I actually measured the Z home signal on the AUF board just
before the microcontroller.? Its 0V before the axis reaches home
position, and goes to 4.4V when the home position is reached.?
(Thanks George for the schematic!).? What now?? Should I try
reseating the microcontroller in its socket?
On 2/8/2023 11:20 AM, Pathwizard wrote:
toggle quoted message
Show quoted text
I have an update and request for more help.
I finally got the encoder installed and wired so that it looks
like the old one.? I no longer get overflow or underflow alarm.?
When I enable the drives, nothing moves, as it should be.
When I "Home", the z axis slowly moves up, just like it
should.? However, it goes right past home and hits the limit
switch and throws the alarm for Z limit.
I've carefully checked the home and limit switch and its
connections all the way to the AUX board and everything looks
fine.? Home switch is Normal Open and closes correctly.? When
the switch is open, I get about 24V across it, as expected.? I
looked at the AUX schematic and this input is drained down to
about 3 V and fed directly into the 8 bit microcontroller on
that board.? So it would point to a bad microcontroller or AUF
board.? Hopefully not.? Any suggestions?
Thanks
Will Grant
===========================================================
On 2/4/2023 3:19 PM, George
Wroclawski wrote:
First: what your machine is doing is unusual.
Without the drives enabled but the machine On,
none of the Axis should move.
Turn the drives ON and none of the Axis should
move. The control will monitor position and maintain it. The
exception would be if the position loop for an Axis is
compromised/broken/bad. Then it will drift at a speed
relative to how far off your balance pot is. What is unusual
here is that you are getting a dac underflow. The control
would not display this unless it saw uncommanded movement.
If I was there, I would pull the encoder plug
and adjust the balance pot so the z axis will not drift. I
usually pull the belt cover off to watch this drift better.
I would also check the X and y.
Might as well. Next because of the conflicting
observations, I would do a scan disk just to see if there is
corrupted data, and I would probably reload the software.
The wild card here is your encoder. Not sure
the control is happy with it. I do not have a V2XT to play
with near me but I would turn the z and y ballscrew to see
if the display updates position.
Then try the Z axis.?
You have 2 more tricks to try. Swap motors. X
and Z or Y and Z. See if it follows the motor/encoder
assembly. Same for the Z drive board. Swap that with X or Y.
The command signal is typically a +/- 10 volt
DC signal to tell a drive to move in a specific direction
and a velocity relative to that voltage. That command signal
is generated by the control using the G codes and distances
to go that you input. The drive has no position loop. It
does have a velocity loop. Commonly called the tach. It is
in the same connector as the motor armature. The drive is
totally dependent on the control to monitor position and
expectations and convert them to a velocity command.
Thus this command can be a fraction of a volt
to maintain position or 10vdc for a rapid move.
George
Wroclawski
Service Manager
McDaniel Machinery Inc.
On Sat, Feb 4, 2023, 2:39 PM
Pathwizard < willg@...>
wrote:
Thanks George,
I have the maintenance manual and have attached the
relevant chapter here I believe.
I just found and read this chapter after I got your
email.? It does help me understand what you mean by
"command".
Based on this and your previous email, it seems I need
to adjust the balance while monitoring voltage on TP3
(which is also JP1-6 which is not connected on my
machine).? Should I assume the VG and CG should be
left alone?? Can this be done before drives are
enabled?? I'm thinking I should temporarily disconnect
the wire from J1-1 and short that pin to pin 2 while
making the balance adjustment to be sure its voltage is
zero during adjustment?
Is it common for this type thing to just go out of
balance by itself after not being operated for a while?
I notice dust collected on portions of my drivers.? Do
you recommend blowing this off?? Any other recommended?
preventative maintenance?
I'm not sure how I can monitor and record the command
voltage over time.? Maybe my scope if it doesn't change
very fast.
On 2/4/2023 11:09 AM, George Wroclawski via
wrote:
MSI drives.
Let's see what I can send.
JP4 is the encoder for Z?
JP9 is the command
There is a trouble shooting section in the
maintenance manual which i cannot access right now.
I will keep looking.
-----Original Message-----
From: Pathwizard <willg@...>
To: [email protected]
Sent: Tue, Jan 31, 2023 5:38 pm
Subject: Re: [BridgeportMill] V2XT help needed
Thanks again.
Here is a picture of the drive.? Not
sure which type it is.? You can see the
pots in the upper left.
On 1/31/2023 5:16 PM, George Wroclawski
wrote:
I am not at home right now. In TN
installing 2 Kitamura horizontal pallet
changers.
When i get home, i will see what i
have in my?computer in pdf. My boss sold
his building so all my books are in
boxes in my barn. This is all done from
memory. I am assuming you have the MSI
drives. Not the gold chassis Bridgeport
drives. Expect a email on Saturday.
George Wroclawski
Service Manager
McDaniel Machinery Inc.
On Tue, Jan 31, 2023, 6:06
PM Pathwizard < willg@...>
wrote:
Thanks so much
for your help George.? Without it (and
some more to go I'm afraid) I'm going to
have to scrap this old control and
upgrade.? I'd really like to get it
running as is though.? I've had it over
a year and until this, has worked quite
nicely.? Im new to CNC, but I've been
using computers before DOS existed, so
the age doesn't really scare me.? I
program this machine in raw G-code with
good results.
It did not accelerate to max velocity.?
It moved medium speed down but only
about 1 or 1.5 inches and then stopped
with the alarm.
1) How do I monitor the command going to
the drive?
2) To make sure the count is correct,
somehow I need to count the pulses while
rotating the motor by hand and I should
get 250 rising signals on A with one
turn.? Is this what you're suggesting??
I can probably rig up a counter of some
kind to do this.
3) In principle, I understand your
instructions for balancing the drive.?
Sounds a bit scary though.? Each drive
has what appears to be 3 pot adjustments
on the front.? All have a dot of red
paint to act as a security? lock I
suppose.? Are these what is used for
this balancing?? Is there any
documentation available to help me know
which and how to adjust?
Thanks again for the help.
|
I have an update and request for more help.
I finally got the encoder installed and wired so that it looks
like the old one.? I no longer get overflow or underflow alarm.?
When I enable the drives, nothing moves, as it should be.
When I "Home", the z axis slowly moves up, just like it should.?
However, it goes right past home and hits the limit switch and
throws the alarm for Z limit.
I've carefully checked the home and limit switch and its
connections all the way to the AUX board and everything looks
fine.? Home switch is Normal Open and closes correctly.? When the
switch is open, I get about 24V across it, as expected.? I looked
at the AUX schematic and this input is drained down to about 3 V
and fed directly into the 8 bit microcontroller on that board.? So
it would point to a bad microcontroller or AUF board.? Hopefully
not.? Any suggestions?
Thanks
Will Grant
===========================================================
On 2/4/2023 3:19 PM, George Wroclawski
wrote:
toggle quoted message
Show quoted text
First: what your machine is doing is unusual.
Without the drives enabled but the machine On,
none of the Axis should move.
Turn the drives ON and none of the Axis should
move. The control will monitor position and maintain it. The
exception would be if the position loop for an Axis is
compromised/broken/bad. Then it will drift at a speed relative
to how far off your balance pot is. What is unusual here is
that you are getting a dac underflow. The control would not
display this unless it saw uncommanded movement.
If I was there, I would pull the encoder plug
and adjust the balance pot so the z axis will not drift. I
usually pull the belt cover off to watch this drift better. I
would also check the X and y.
Might as well. Next because of the conflicting
observations, I would do a scan disk just to see if there is
corrupted data, and I would probably reload the software.
The wild card here is your encoder. Not sure the
control is happy with it. I do not have a V2XT to play with
near me but I would turn the z and y ballscrew to see if the
display updates position.
Then try the Z axis.?
You have 2 more tricks to try. Swap motors. X
and Z or Y and Z. See if it follows the motor/encoder
assembly. Same for the Z drive board. Swap that with X or Y.
The command signal is typically a +/- 10 volt DC
signal to tell a drive to move in a specific direction and a
velocity relative to that voltage. That command signal is
generated by the control using the G codes and distances to go
that you input. The drive has no position loop. It does have a
velocity loop. Commonly called the tach. It is in the same
connector as the motor armature. The drive is totally
dependent on the control to monitor position and expectations
and convert them to a velocity command.
Thus this command can be a fraction of a volt to
maintain position or 10vdc for a rapid move.
George
Wroclawski
Service Manager
McDaniel Machinery Inc.
On Sat, Feb 4, 2023, 2:39 PM
Pathwizard < willg@...>
wrote:
Thanks George,
I have the maintenance manual and have attached the
relevant chapter here I believe.
I just found and read this chapter after I got your
email.? It does help me understand what you mean by
"command".
Based on this and your previous email, it seems I need to
adjust the balance while monitoring voltage on TP3 (which
is also JP1-6 which is not connected on my machine).? Should
I assume the VG and CG should be left alone?? Can
this be done before drives are enabled?? I'm thinking I
should temporarily disconnect the wire from J1-1 and short
that pin to pin 2 while making the balance adjustment to
be sure its voltage is zero during adjustment?
Is it common for this type thing to just go out of
balance by itself after not being operated for a while?
I notice dust collected on portions of my drivers.? Do
you recommend blowing this off?? Any other recommended?
preventative maintenance?
I'm not sure how I can monitor and record the command
voltage over time.? Maybe my scope if it doesn't change
very fast.
On 2/4/2023 11:09 AM, George Wroclawski via wrote:
MSI drives.
Let's see what I can send.
JP4 is the encoder for Z?
JP9 is the command
There is a trouble shooting section in the
maintenance manual which i cannot access right now.
I will keep looking.
-----Original Message-----
From: Pathwizard <willg@...>
To: [email protected]
Sent: Tue, Jan 31, 2023 5:38 pm
Subject: Re: [BridgeportMill] V2XT help needed
Thanks again.
Here is a picture of the drive.? Not sure
which type it is.? You can see the pots in
the upper left.
On 1/31/2023 5:16 PM, George Wroclawski
wrote:
I am not at home right now. In TN
installing 2 Kitamura horizontal pallet
changers.
When i get home, i will see what i have
in my?computer in pdf. My boss sold his
building so all my books are in boxes in
my barn. This is all done from memory. I
am assuming you have the MSI drives. Not
the gold chassis Bridgeport drives. Expect
a email on Saturday.
George Wroclawski
Service Manager
McDaniel Machinery Inc.
On Tue, Jan 31, 2023, 6:06 PM
Pathwizard < willg@...>
wrote:
Thanks so much for
your help George.? Without it (and some
more to go I'm afraid) I'm going to have
to scrap this old control and upgrade.?
I'd really like to get it running as is
though.? I've had it over a year and until
this, has worked quite nicely.? Im new to
CNC, but I've been using computers before
DOS existed, so the age doesn't really
scare me.? I program this machine in raw
G-code with good results.
It did not accelerate to max velocity.? It
moved medium speed down but only about 1
or 1.5 inches and then stopped with the
alarm.
1) How do I monitor the command going to
the drive?
2) To make sure the count is correct,
somehow I need to count the pulses while
rotating the motor by hand and I should
get 250 rising signals on A with one
turn.? Is this what you're suggesting?? I
can probably rig up a counter of some kind
to do this.
3) In principle, I understand your
instructions for balancing the drive.?
Sounds a bit scary though.? Each drive has
what appears to be 3 pot adjustments on
the front.? All have a dot of red paint to
act as a security? lock I suppose.? Are
these what is used for this balancing?? Is
there any documentation available to help
me know which and how to adjust?
Thanks again for the help.
|
thanks for your help.
I unplugged the encoder on Z and enabled the drives.? Nothing
moved and I balanced Z and Y using a volt meter on TP3.? They were
not far off already.? largest deviation was about .12 Volts, but I
was able to get that down to .01 volts or less.
Then I plugged in the encoder and enabled the drives and Z began
to drift up (it went down before) and threw a Z DAC Overflow
alarm.? My conclusion here is that when it goes up it throw
Overflow and when it down down it throws Underflow.?? Anyway the
speed it had coming up I'd classify as "medium" - not slow.? So at
this point I hooked a scope to the command terminal and captured
the command that happened during enable.? I've attached the
picture.? The command goes to +10V for about 7ms, and sharply down
to -10 for 6ms and then back to zero.? I'm not sure if this is
normal.
I have other tests that I want to do.? I want to monitor the
encoder output while this is happening and I want monitor the
command signal on the other axis during the enable.? Depending on
what I find, I'll probably switch the motors between z and y and
see what happens. Before switching motors, I may try monitoring
encoder on both Z and Y to compare. ? Switching motors is not
trivial, but I think it would be insightful.? With enough work,
and your guidance, I'm sure I can get to the bottom of this.? More
to come tomorrow.
Thanks again.
Will Grant
On 2/4/2023 3:19 PM, George Wroclawski
wrote:
toggle quoted message
Show quoted text
First: what your machine is doing is unusual.
Without the drives enabled but the machine On,
none of the Axis should move.
Turn the drives ON and none of the Axis should
move. The control will monitor position and maintain it. The
exception would be if the position loop for an Axis is
compromised/broken/bad. Then it will drift at a speed relative
to how far off your balance pot is. What is unusual here is
that you are getting a dac underflow. The control would not
display this unless it saw uncommanded movement.
If I was there, I would pull the encoder plug
and adjust the balance pot so the z axis will not drift. I
usually pull the belt cover off to watch this drift better. I
would also check the X and y.
Might as well. Next because of the conflicting
observations, I would do a scan disk just to see if there is
corrupted data, and I would probably reload the software.
The wild card here is your encoder. Not sure the
control is happy with it. I do not have a V2XT to play with
near me but I would turn the z and y ballscrew to see if the
display updates position.
Then try the Z axis.?
You have 2 more tricks to try. Swap motors. X
and Z or Y and Z. See if it follows the motor/encoder
assembly. Same for the Z drive board. Swap that with X or Y.
The command signal is typically a +/- 10 volt DC
signal to tell a drive to move in a specific direction and a
velocity relative to that voltage. That command signal is
generated by the control using the G codes and distances to go
that you input. The drive has no position loop. It does have a
velocity loop. Commonly called the tach. It is in the same
connector as the motor armature. The drive is totally
dependent on the control to monitor position and expectations
and convert them to a velocity command.
Thus this command can be a fraction of a volt to
maintain position or 10vdc for a rapid move.
George
Wroclawski
Service Manager
McDaniel Machinery Inc.
On Sat, Feb 4, 2023, 2:39 PM
Pathwizard < willg@...>
wrote:
Thanks George,
I have the maintenance manual and have attached the
relevant chapter here I believe.
I just found and read this chapter after I got your
email.? It does help me understand what you mean by
"command".
Based on this and your previous email, it seems I need to
adjust the balance while monitoring voltage on TP3 (which
is also JP1-6 which is not connected on my machine).? Should
I assume the VG and CG should be left alone?? Can
this be done before drives are enabled?? I'm thinking I
should temporarily disconnect the wire from J1-1 and short
that pin to pin 2 while making the balance adjustment to
be sure its voltage is zero during adjustment?
Is it common for this type thing to just go out of
balance by itself after not being operated for a while?
I notice dust collected on portions of my drivers.? Do
you recommend blowing this off?? Any other recommended?
preventative maintenance?
I'm not sure how I can monitor and record the command
voltage over time.? Maybe my scope if it doesn't change
very fast.
On 2/4/2023 11:09 AM, George Wroclawski via wrote:
MSI drives.
Let's see what I can send.
JP4 is the encoder for Z?
JP9 is the command
There is a trouble shooting section in the
maintenance manual which i cannot access right now.
I will keep looking.
-----Original Message-----
From: Pathwizard <willg@...>
To: [email protected]
Sent: Tue, Jan 31, 2023 5:38 pm
Subject: Re: [BridgeportMill] V2XT help needed
Thanks again.
Here is a picture of the drive.? Not sure
which type it is.? You can see the pots in
the upper left.
On 1/31/2023 5:16 PM, George Wroclawski
wrote:
I am not at home right now. In TN
installing 2 Kitamura horizontal pallet
changers.
When i get home, i will see what i have
in my?computer in pdf. My boss sold his
building so all my books are in boxes in
my barn. This is all done from memory. I
am assuming you have the MSI drives. Not
the gold chassis Bridgeport drives. Expect
a email on Saturday.
George Wroclawski
Service Manager
McDaniel Machinery Inc.
On Tue, Jan 31, 2023, 6:06 PM
Pathwizard < willg@...>
wrote:
Thanks so much for
your help George.? Without it (and some
more to go I'm afraid) I'm going to have
to scrap this old control and upgrade.?
I'd really like to get it running as is
though.? I've had it over a year and until
this, has worked quite nicely.? Im new to
CNC, but I've been using computers before
DOS existed, so the age doesn't really
scare me.? I program this machine in raw
G-code with good results.
It did not accelerate to max velocity.? It
moved medium speed down but only about 1
or 1.5 inches and then stopped with the
alarm.
1) How do I monitor the command going to
the drive?
2) To make sure the count is correct,
somehow I need to count the pulses while
rotating the motor by hand and I should
get 250 rising signals on A with one
turn.? Is this what you're suggesting?? I
can probably rig up a counter of some kind
to do this.
3) In principle, I understand your
instructions for balancing the drive.?
Sounds a bit scary though.? Each drive has
what appears to be 3 pot adjustments on
the front.? All have a dot of red paint to
act as a security? lock I suppose.? Are
these what is used for this balancing?? Is
there any documentation available to help
me know which and how to adjust?
Thanks again for the help.
|
Re: Bridgeport 1.5 hp Vari head motor - how remove plastic fan, how trace wires?
The fan is a press on fit. Yes, it has a key. I pry it off. If it breaks, they are cheap (or used to be).
-----Original Message-----
From: aribert2 <aribert@...>
To: [email protected] < [email protected]>
Sent: Sat, Feb 4, 2023 8:32 pm
Subject: [BridgeportMill] Bridgeport 1.5 hp Vari head motor - how remove plastic fan, how trace wires?
I have a new
to me 1.5 hp motor off of a Vari-drive J-head that is not playing nice when I hook it up to a 3 hp static phase converter (with a 3 hp idler running). I have no issues running? different Bridgeport 1.5 & 2 hp motors on the same set up so I want to trace the
motor wires (not all of them were tagged).
How do I remove the plastic
fan on the top of the motor to proceed to dismantle the motor? Image of motor/fan attached.? It appears the fan is just pressed on the shaft.
Once I have the motor end
bell off, how do I determine which wire goes where - in other words which wires need to be combined for 220v if they are not tagged? I have the chart on the side of the motor to tell me which wire numbers are to be combined.? Is there any chance the wires
might have a second tag on them inside the motor?
|
Bridgeport 1.5 hp Vari head motor - how remove plastic fan, how trace wires?
I have a new
to me 1.5 hp motor off of a Vari-drive J-head that is not playing nice when I hook it up to a 3 hp static phase converter (with a 3 hp idler running). I have no issues running? different Bridgeport 1.5 & 2 hp motors on the same set up so I want to trace the
motor wires (not all of them were tagged).
How do I remove the plastic
fan on the top of the motor to proceed to dismantle the motor? Image of motor/fan attached.? It appears the fan is just pressed on the shaft.
Once I have the motor end
bell off, how do I determine which wire goes where - in other words which wires need to be combined for 220v if they are not tagged? I have the chart on the side of the motor to tell me which wire numbers are to be combined.? Is there any chance the wires
might have a second tag on them inside the motor?
|
First: what your machine is doing is unusual. Without the drives enabled but the machine On, none of the Axis should move. Turn the drives ON and none of the Axis should move. The control will monitor position and maintain it. The exception would be if the position loop for an Axis is compromised/broken/bad. Then it will drift at a speed relative to how far off your balance pot is. What is unusual here is that you are getting a dac underflow. The control would not display this unless it saw uncommanded movement. If I was there, I would pull the encoder plug and adjust the balance pot so the z axis will not drift. I usually pull the belt cover off to watch this drift better. I would also check the X and y. Might as well. Next because of the conflicting observations, I would do a scan disk just to see if there is corrupted data, and I would probably reload the software. The wild card here is your encoder. Not sure the control is happy with it. I do not have a V2XT to play with near me but I would turn the z and y ballscrew to see if the display updates position. Then try the Z axis.? You have 2 more tricks to try. Swap motors. X and Z or Y and Z. See if it follows the motor/encoder assembly. Same for the Z drive board. Swap that with X or Y.
The command signal is typically a +/- 10 volt DC signal to tell a drive to move in a specific direction and a velocity relative to that voltage. That command signal is generated by the control using the G codes and distances to go that you input. The drive has no position loop. It does have a velocity loop. Commonly called the tach. It is in the same connector as the motor armature. The drive is totally dependent on the control to monitor position and expectations and convert them to a velocity command. Thus this command can be a fraction of a volt to maintain position or 10vdc for a rapid move.
George Wroclawski
Service Manager
McDaniel Machinery Inc.
On Sat, Feb 4, 2023, 2:39 PM Pathwizard < willg@...> wrote:
Thanks George,
I have the maintenance manual and have attached the relevant
chapter here I believe.
I just found and read this chapter after I got your email.? It
does help me understand what you mean by "command".
Based on this and your previous email, it seems I need to adjust
the balance while monitoring voltage on TP3 (which is also JP1-6
which is not connected on my machine).? Should I assume the VG
and CG should be left alone?? Can this be done before drives
are enabled?? I'm thinking I should temporarily disconnect the
wire from J1-1 and short that pin to pin 2 while making the
balance adjustment to be sure its voltage is zero during
adjustment?
Is it common for this type thing to just go out of balance by
itself after not being operated for a while?
I notice dust collected on portions of my drivers.? Do you
recommend blowing this off?? Any other recommended? preventative
maintenance?
I'm not sure how I can monitor and record the command voltage
over time.? Maybe my scope if it doesn't change very fast.
On 2/4/2023 11:09 AM, George Wroclawski
via wrote:
MSI drives.
Let's see what I can send.
JP4 is the encoder for Z?
JP9 is the command
There is a trouble shooting section in the maintenance
manual which i cannot access right now.
I will keep looking.
-----Original Message-----
From: Pathwizard <willg@...>
To: [email protected]
Sent: Tue, Jan 31, 2023 5:38 pm
Subject: Re: [BridgeportMill] V2XT help needed
Thanks again.
Here is a picture of the drive.? Not sure which
type it is.? You can see the pots in the upper left.
On 1/31/2023
5:16 PM, George Wroclawski wrote:
I am not at home right now. In TN installing 2
Kitamura horizontal pallet changers.
When i get home, i will see what i have in
my?computer in pdf. My boss sold his building so
all my books are in boxes in my barn. This is all
done from memory. I am assuming you have the MSI
drives. Not the gold chassis Bridgeport drives.
Expect a email on Saturday.
George Wroclawski
Service Manager
McDaniel Machinery Inc.
On
Tue, Jan 31, 2023, 6:06 PM Pathwizard < willg@...>
wrote:
Thanks so much
for your help George.? Without it (and some more
to go I'm afraid) I'm going to have to scrap this
old control and upgrade.? I'd really like to get
it running as is though.? I've had it over a year
and until this, has worked quite nicely.? Im new
to CNC, but I've been using computers before DOS
existed, so the age doesn't really scare me.? I
program this machine in raw G-code with good
results.
It did not accelerate to max velocity.? It moved
medium speed down but only about 1 or 1.5 inches
and then stopped with the alarm.
1) How do I monitor the command going to the
drive?
2) To make sure the count is correct, somehow I
need to count the pulses while rotating the motor
by hand and I should get 250 rising signals on A
with one turn.? Is this what you're suggesting?? I
can probably rig up a counter of some kind to do
this.
3) In principle, I understand your instructions
for balancing the drive.? Sounds a bit scary
though.? Each drive has what appears to be 3 pot
adjustments on the front.? All have a dot of red
paint to act as a security? lock I suppose.? Are
these what is used for this balancing?? Is there
any documentation available to help me know which
and how to adjust?
Thanks again for the help.
|
Thanks George,
I have the maintenance manual and have attached the relevant
chapter here I believe.
I just found and read this chapter after I got your email.? It
does help me understand what you mean by "command".
Based on this and your previous email, it seems I need to adjust
the balance while monitoring voltage on TP3 (which is also JP1-6
which is not connected on my machine).? Should I assume the VG
and CG should be left alone?? Can this be done before drives
are enabled?? I'm thinking I should temporarily disconnect the
wire from J1-1 and short that pin to pin 2 while making the
balance adjustment to be sure its voltage is zero during
adjustment?
Is it common for this type thing to just go out of balance by
itself after not being operated for a while?
I notice dust collected on portions of my drivers.? Do you
recommend blowing this off?? Any other recommended? preventative
maintenance?
I'm not sure how I can monitor and record the command voltage
over time.? Maybe my scope if it doesn't change very fast.
On 2/4/2023 11:09 AM, George Wroclawski
via groups.io wrote:
toggle quoted message
Show quoted text
MSI drives.
Let's see what I can send.
JP4 is the encoder for Z?
JP9 is the command
There is a trouble shooting section in the maintenance
manual which i cannot access right now.
I will keep looking.
-----Original Message-----
From: Pathwizard <willg@...>
To: [email protected]
Sent: Tue, Jan 31, 2023 5:38 pm
Subject: Re: [BridgeportMill] V2XT help needed
Thanks again.
Here is a picture of the drive.? Not sure which
type it is.? You can see the pots in the upper left.
On 1/31/2023
5:16 PM, George Wroclawski wrote:
I am not at home right now. In TN installing 2
Kitamura horizontal pallet changers.
When i get home, i will see what i have in
my?computer in pdf. My boss sold his building so
all my books are in boxes in my barn. This is all
done from memory. I am assuming you have the MSI
drives. Not the gold chassis Bridgeport drives.
Expect a email on Saturday.
George Wroclawski
Service Manager
McDaniel Machinery Inc.
On
Tue, Jan 31, 2023, 6:06 PM Pathwizard < willg@...>
wrote:
Thanks so much
for your help George.? Without it (and some more
to go I'm afraid) I'm going to have to scrap this
old control and upgrade.? I'd really like to get
it running as is though.? I've had it over a year
and until this, has worked quite nicely.? Im new
to CNC, but I've been using computers before DOS
existed, so the age doesn't really scare me.? I
program this machine in raw G-code with good
results.
It did not accelerate to max velocity.? It moved
medium speed down but only about 1 or 1.5 inches
and then stopped with the alarm.
1) How do I monitor the command going to the
drive?
2) To make sure the count is correct, somehow I
need to count the pulses while rotating the motor
by hand and I should get 250 rising signals on A
with one turn.? Is this what you're suggesting?? I
can probably rig up a counter of some kind to do
this.
3) In principle, I understand your instructions
for balancing the drive.? Sounds a bit scary
though.? Each drive has what appears to be 3 pot
adjustments on the front.? All have a dot of red
paint to act as a security? lock I suppose.? Are
these what is used for this balancing?? Is there
any documentation available to help me know which
and how to adjust?
Thanks again for the help.
|
MSI drives.
Let's see what I can send.
JP4 is the encoder for Z?
JP9 is the command
There is a trouble shooting section in the maintenance manual which i cannot access right now.
I will keep looking.
-----Original Message-----
From: Pathwizard <willg@...>
To: [email protected]
Sent: Tue, Jan 31, 2023 5:38 pm
Subject: Re: [BridgeportMill] V2XT help needed
Thanks again.
Here is a picture of the drive.? Not sure which type it is.? You
can see the pots in the upper left.
On 1/31/2023 5:16 PM, George Wroclawski
wrote:
I am not at home right now. In TN installing 2
Kitamura horizontal pallet changers.
When i get home, i will see what i have in
my?computer in pdf. My boss sold his building so all my books
are in boxes in my barn. This is all done from memory. I am
assuming you have the MSI drives. Not the gold chassis
Bridgeport drives. Expect a email on Saturday.
George
Wroclawski
Service Manager
McDaniel Machinery Inc.
On Tue, Jan 31, 2023, 6:06 PM
Pathwizard < willg@...>
wrote:
Thanks so
much for your help George.? Without it (and some more to go
I'm afraid) I'm going to have to scrap this old control and
upgrade.? I'd really like to get it running as is though.?
I've had it over a year and until this, has worked quite
nicely.? Im new to CNC, but I've been using computers before
DOS existed, so the age doesn't really scare me.? I program
this machine in raw G-code with good results.
It did not accelerate to max velocity.? It moved medium speed
down but only about 1 or 1.5 inches and then stopped with the
alarm.
1) How do I monitor the command going to the drive?
2) To make sure the count is correct, somehow I need to count
the pulses while rotating the motor by hand and I should get
250 rising signals on A with one turn.? Is this what you're
suggesting?? I can probably rig up a counter of some kind to
do this.
3) In principle, I understand your instructions for balancing
the drive.? Sounds a bit scary though.? Each drive has what
appears to be 3 pot adjustments on the front.? All have a dot
of red paint to act as a security? lock I suppose.? Are these
what is used for this balancing?? Is there any documentation
available to help me know which and how to adjust?
Thanks again for the help.
|
Thanks again.
Here is a picture of the drive.? Not sure which type it is.? You
can see the pots in the upper left.
On 1/31/2023 5:16 PM, George Wroclawski
wrote:
toggle quoted message
Show quoted text
I am not at home right now. In TN installing 2
Kitamura horizontal pallet changers.
When i get home, i will see what i have in
my?computer in pdf. My boss sold his building so all my books
are in boxes in my barn. This is all done from memory. I am
assuming you have the MSI drives. Not the gold chassis
Bridgeport drives. Expect a email on Saturday.
George
Wroclawski
Service Manager
McDaniel Machinery Inc.
On Tue, Jan 31, 2023, 6:06 PM
Pathwizard < willg@...>
wrote:
Thanks so
much for your help George.? Without it (and some more to go
I'm afraid) I'm going to have to scrap this old control and
upgrade.? I'd really like to get it running as is though.?
I've had it over a year and until this, has worked quite
nicely.? Im new to CNC, but I've been using computers before
DOS existed, so the age doesn't really scare me.? I program
this machine in raw G-code with good results.
It did not accelerate to max velocity.? It moved medium speed
down but only about 1 or 1.5 inches and then stopped with the
alarm.
1) How do I monitor the command going to the drive?
2) To make sure the count is correct, somehow I need to count
the pulses while rotating the motor by hand and I should get
250 rising signals on A with one turn.? Is this what you're
suggesting?? I can probably rig up a counter of some kind to
do this.
3) In principle, I understand your instructions for balancing
the drive.? Sounds a bit scary though.? Each drive has what
appears to be 3 pot adjustments on the front.? All have a dot
of red paint to act as a security? lock I suppose.? Are these
what is used for this balancing?? Is there any documentation
available to help me know which and how to adjust?
Thanks again for the help.
|
I am not at home right now. In TN installing 2 Kitamura horizontal pallet changers. When i get home, i will see what i have in my?computer in pdf. My boss sold his building so all my books are in boxes in my barn. This is all done from memory. I am assuming you have the MSI drives. Not the gold chassis Bridgeport drives. Expect a email on Saturday. George Wroclawski
Service Manager
McDaniel Machinery Inc.
On Tue, Jan 31, 2023, 6:06 PM Pathwizard < willg@...> wrote: Thanks so much for your help George.? Without it (and some more to go I'm afraid) I'm going to have to scrap this old control and upgrade.? I'd really like to get it running as is though.? I've had it over a year and until this, has worked quite nicely.? Im new to CNC, but I've been using computers before DOS existed, so the age doesn't really scare me.? I program this machine in raw G-code with good results.
It did not accelerate to max velocity.? It moved medium speed down but only about 1 or 1.5 inches and then stopped with the alarm.
1) How do I monitor the command going to the drive?
2) To make sure the count is correct, somehow I need to count the pulses while rotating the motor by hand and I should get 250 rising signals on A with one turn.? Is this what you're suggesting?? I can probably rig up a counter of some kind to do this.
3) In principle, I understand your instructions for balancing the drive.? Sounds a bit scary though.? Each drive has what appears to be 3 pot adjustments on the front.? All have a dot of red paint to act as a security? lock I suppose.? Are these what is used for this balancing?? Is there any documentation available to help me know which and how to adjust?
Thanks again for the help.
|
Thanks so much for your help George.? Without it (and some more to go I'm afraid) I'm going to have to scrap this old control and upgrade.? I'd really like to get it running as is though.? I've had it over a year and until this, has worked quite nicely.? Im new to CNC, but I've been using computers before DOS existed, so the age doesn't really scare me.? I program this machine in raw G-code with good results.
It did not accelerate to max velocity.? It moved medium speed down but only about 1 or 1.5 inches and then stopped with the alarm.
1) How do I monitor the command going to the drive?
2) To make sure the count is correct, somehow I need to count the pulses while rotating the motor by hand and I should get 250 rising signals on A with one turn.? Is this what you're suggesting?? I can probably rig up a counter of some kind to do this.
3) In principle, I understand your instructions for balancing the drive.? Sounds a bit scary though.? Each drive has what appears to be 3 pot adjustments on the front.? All have a dot of red paint to act as a security? lock I suppose.? Are these what is used for this balancing?? Is there any documentation available to help me know which and how to adjust?
Thanks again for the help.
|
You have to understand the alarms.
DAC overflow means the control commanded a move but did not see encoder pulses. Did the motor move? If yes you have a position loop problem. If not, you have a motor, drive, or cable problem.
DAC underflow means the control did NOT command a movement but saw one. At that point I need to see how it moves. Did it accelerate to maximum velocity? If the tachometer loop (velocity loop) is reversed, it will increase the current to achieve the correct count in the correct direction. This also goes for the position loop. If the count is reversed, it will also run away trying to achieve the correct position. Lastly, reversing the armature wires can create a runaway.
However, just turning the drives ON, no move is commanded. What you are seeing is a drift. It must be seeing some encoder count because it knows it moved and thus gave the underflow alarm. It should hold position. I believe you have the BMDC version.? You need to monitor the command going to the drive. I would also boot the machine and move the ball screw by hand to make sure the count is correct. Later pull each encoder plug out. One at a time. That axis will drift but not fault out. Adjust the balance pot on the drive so the drift stops. Do not forget to home the machine after doing this.
On Mon, Jan 30, 2023, 3:16 PM Pathwizard < willg@...> wrote: I had a problem? with my V2XT where the z axis wouldn't home and it seemed to be overshooting.
In my ignorance and brazenness, I broke the encoder on Z axis.
I've since replaced the encoder with one that should have the same output (250 lines, TTL Quadrature).? There were some things I wasn't sure of (A leads B on CCW rotation, and index pulse direction) but I put a scope on Y axis and confirmed mine has the same shape and lead etc.? So, in theory I'm back to the place where the original failure occurred.
However, when I try to enable the drives, the Z axis immediately begins to travel down, and very soon throw a message "Z DAC underflow".? Note that this happens during Enable, not during homing.? I've captured the output of the encoder at this point and have attached a picture here.
Yellow is A, Blue is B and magenta is index.
I've confirmed continuity from encoder to the AXSBOB for all lines.
Any idea what the problem could be and suggested next step?
Thanks for any guidance.
Will Grant
George Wroclawski
Service Manager
McDaniel Machinery Inc.
Mobile : 1-205-937-2066
|
Would the problem not be with the limit switch and or the home switch?
On Mon, Jan 30, 2023 at 12:16 PM, Pathwizard <willg@...> wrote: I had a problem? with my V2XT where the z axis wouldn't home and it seemed to be overshooting.
In my ignorance and brazenness, I broke the encoder on Z axis.
I've since replaced the encoder with one that should have the same output (250 lines, TTL Quadrature).? There were some things I wasn't sure of (A leads B on CCW rotation, and index pulse direction) but I put a scope on Y axis and confirmed mine has the same shape and lead etc.? So, in theory I'm back to the place where the original failure occurred.
However, when I try to enable the drives, the Z axis immediately begins to travel down, and very soon throw a message "Z DAC underflow".? Note that this happens during Enable, not during homing.? I've captured the output of the encoder at this point and have attached a picture here.
Yellow is A, Blue is B and magenta is index.
I've confirmed continuity from encoder to the AXSBOB for all lines.
Any idea what the problem could be and suggested next step?
Thanks for any guidance.
Will Grant
|
I had a problem? with my V2XT where the z axis wouldn't home and it seemed to be overshooting.
In my ignorance and brazenness, I broke the encoder on Z axis.
I've since replaced the encoder with one that should have the same output (250 lines, TTL Quadrature).? There were some things I wasn't sure of (A leads B on CCW rotation, and index pulse direction) but I put a scope on Y axis and confirmed mine has the same shape and lead etc.? So, in theory I'm back to the place where the original failure occurred.
However, when I try to enable the drives, the Z axis immediately begins to travel down, and very soon throw a message "Z DAC underflow".? Note that this happens during Enable, not during homing.? I've captured the output of the encoder at this point and have attached a picture here.
Yellow is A, Blue is B and magenta is index.
I've confirmed continuity from encoder to the AXSBOB for all lines.
Any idea what the problem could be and suggested next step?
Thanks for any guidance.
Will Grant
|
I should mention that EMI was modifying the AXSBOB and the AUXBOB boards with fuses. Might be a good idea to replace them. Also the original BMDC boards that were not surface mount had a piece of wire as the L1. George Wroclawski
Service Manager
McDaniel Machinery Inc.
On Thu, Jan 26, 2023, 9:39 AM Pathwizard < willg@...> wrote: If I had a part number I'd be good.? This is apparently a well known issue that happens when the 5V shorts.? Seems that this is a sacrificial component.? Although I've seen this referenced a number of times on the forums, I've never seen a replacement value.
If I can't find any other info, I'll just order a 100uH with about 1 amp capacity.? Probably it doesn't matter that much.? Probably the most important feature is that it burns before other components are damaged, so less is probably better.
|
Common issue. Starting with the cutler hammer controls on the EzTraks, the power goes through a piggy back board with circuit breakers. This protects the BMDC. To get people running, I used to take 5vdc from the logic power supply, fuse it, and connect it to the tantalum capacitor + lead in the corner of the AXSBOB board. That back feeds the encoders and related circuits. You are running again. George Wroclawski
Service Manager
McDaniel Machinery Inc.
On Thu, Jan 26, 2023, 9:39 AM Pathwizard < willg@...> wrote: If I had a part number I'd be good.? This is apparently a well known issue that happens when the 5V shorts.? Seems that this is a sacrificial component.? Although I've seen this referenced a number of times on the forums, I've never seen a replacement value.
If I can't find any other info, I'll just order a 100uH with about 1 amp capacity.? Probably it doesn't matter that much.? Probably the most important feature is that it burns before other components are damaged, so less is probably better.
|
If I had a part number I'd be good.? This is apparently a well known issue that happens when the 5V shorts.? Seems that this is a sacrificial component.? Although I've seen this referenced a number of times on the forums, I've never seen a replacement value.
If I can't find any other info, I'll just order a 100uH with about 1 amp capacity.? Probably it doesn't matter that much.? Probably the most important feature is that it burns before other components are damaged, so less is probably better.
|
Post a photo, also regulator number if available. Usually 5V circuits are 1 amp or less with the occasional 1.5 or 5 amp reg. Guesstimate value, 50uh-100uh.
toggle quoted message
Show quoted text
On Jan 26, 2023, at 9:09 AM, Pathwizard <willg@...> wrote:
My BMDC has been damaged by 5V short, which burned L1.? Does anyone know what part I need to replace it with? Its surface mount.? (What L value and what current capacity?)
Thanks for any guidance.
Will Grant
|
My BMDC has been damaged by 5V short, which burned L1.? Does anyone know what part I need to replace it with? Its surface mount.? (What L value and what current capacity?)
Thanks for any guidance.
Will Grant
|
Re: Bridgeport M head questions
Here's the parts of the self ejecting drawbar. My mill came to me with a drawbar made of a nut welded on some all thread, pretty crappy!
|
comstock_friend
