??? ??? ??? off the wall & just for kicks , set yer date back
a week or so
??? ??? animal
On 1/29/2020 10:42 AM, John Dammeyer
wrote:
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I went down this
morning and switched on the machine.? As soon as Windows was
up I ran MACH3.? ??As soon as MACH3 was up
I sent it to find the home switches.
?
I then sent it to
work coordinates zero which is about 4" up from the bottom
of the knee travel and mid point for X/Y.? As it started moving up
at the exact same instant that the little balloon came up
telling me that my windows might be out of date and doesn't
have virus protection, the Z axis locked up with noisy
rattling.? And of
course it lost position.? I
left the balloon in place and re-homed. ?Then repeated the goto 0.? At a much higher point
it locked it up again.
?
After that no matter
how many times I tried it worked perfectly.? This was different from
the machine reporting an ESTOP event and stopping
completely.
?
So.? Machine cold?? Z axis binding at 25
ipm?? Or Microsoft
running crap in the background that interrupts the GECKO
with 60VDC supply to a 1200 oz-in motor using 4:1 belt drive
to the mill Knee shaft which is 0.25" per rev.? Conversion is 24,000
with the GECKO 10 micros steps per step.? Ie.? 2000 steps is 0.25" and
it needs 3 turns to move 0.25" so that's 6000 steps per
0.25" or 24,000 steps
?
Just went down, tried
it again booting from scratch.?
This time the XY motion, which is DC Servos faulted
with a following error at the same time the balloon
appeared.? The Z axis
moved smoothly at 8 IPM toward the switches and then 20 IPM
(I changed it) up to the work coordinates 0 position.
?
So I think first
thing is to disable completely that test by the OS so the
balloon never shows up.? So
it doesn't even have the virus icon on the task bar.? This system isn't even
on a network.
?
More and more I'm
suspecting the OS here.? Which
also explains why it never shows up with Linux.
?
John
?
?
?
There is nothing worse than a machine that
you can't trust.? I feel your frustration.?
I have an ethernet Smooth Stepper that has
done 14 hour jobs and never missed a beat.
Sent from my Samsung
Galaxy smartphone.
-------- Original message
--------
Date: 29/01/2020 5:44 pm
(GMT+00:00)
Subject: Re: [MachCNC]
Electrical Noise
And mine is this
one:
?
For all I know this
is causing a problem during homng.
E-Stop,
Fault, ERR/RST, and "Charge Pump" timeouts turn off all
outputs without assistance from host software
?
If
for some reason the Fault or E-Stop inputs have a spurious
pulse then I could see it stopping on homing Z. ?
?
Or
if the MACH3 Homing Z software does something odd
occasionally with the charge pump this would also cause
issues.? And some
sort of WIN-XP issues could cause the charge pump to vanish
shortly after booting WIN-XP.
?
That
would also explain why the problem never shows up on
LinuxCNC with the parallel port or the MESA Ethernet 7i92H.? If it comes back I may
just 'borrow' the USB Smooth Stepper from my CNC router.? Another option is to
set the dip switch on the PMDX-126 to disable Charge Pump. ?
?
May
not be electrical at all.
?
John
?
?
?
?
No.? Some are straight though...
But read the spec on this one...
Sent from my Samsung Galaxy
smartphone.
-------- Original message
--------
Date: 29/01/2020 5:14 pm
(GMT+00:00)
Subject: Re: [MachCNC]
Electrical Noise
I have been following this thread but not
carefully because I didn't think I had a problem. Now I
am thinking that some minor drift I have over time could
be missed steps not mechanical as I thought.?
Is there any problem setting the debounce
time as 10 or 20 us??
if this is input debouncing then what
signals are being considers as noise sources, limit
switches? there is no position feedback?
also, aren't all break out boards opto
issolated?
Best regards, Spencer Chase
67550 Bell Springs Rd.
Garberville, CA 95542 Postal service only.
Laytonville, CA 95454 UPS only.
Spencer@...
Spencer@...
Spencer@...
(425) 791-0309
(707) 223-8212
------ Original Message ------
Sent: 1/29/2020 6:00:22 AM
Subject: Re: [MachCNC] Electrical Noise
I've posted my solution to electrical
noise on this forum a few times and no one has come
back and said it did or didn't work for them, but
when I had random missed steps? and spent a long
time trying to find the fault... I fitted an Opto
isolated BOB and I've never had a missed step since.
Problem solved.
Sent from my Samsung
Galaxy smartphone.
-------- Original message
--------
Date: 29/01/2020 12:55 am
(GMT+00:00)
Subject: Re: [MachCNC]
Electrical Noise
> chuck via Groups.Io
> have you tried the debounce input setting in
general config? had a similar
> issue long time ago and debounce cured it. don't
remember what I had to set
> it at but it worked.
> haven't used Mach3 for quite a while.
> Chuck
Just tried that.? And the problem with working on
these types of issues is what I just ran into.? I set
it to 10x40uS.? Quit. Restarted MACH3 and homed over a
4" distance.? No problem.? Perfect.? Moved the knee
back up. Set the debounce back to 0.? Shut down.?
Restarted MACH3 and homed again over a 4" distance.?
No failure.? Now it won't fail.
Sigh.? I think I'll leave it at 5x40uS and see what
happens while I fab up a new cable and connector that
lets me deal with the shield better.
If all was working right (as in wrong)? it would fail
repeatedly without a debounce but succeed with a
debounce.? Then I could change wiring, add ferrites
etc. and watch the problem vanish.? But no.? It's
going to be stubborn.
John
>
