MachCNC@groups.io

Re: stepper stall (to Art)

Isak Levinson

Ok, I tried with acceleration of 1. I'm working with mm so it is 1sec for
1mm/sec. It is VERY slow.
The problem persists.
This is what happens:
  The 1st axis accelerates as it should.
  When the 2nd axis changes direction, the firts axis stops emidiatly.
  The backlash compensates for the 2nd axis (I guess that the compensation
process dose not accelerates and decelerates but startst and stops emidiatly
with the correction velocity).
  When the backlash is done the 1st axis imidiatly returns to its previous
velocity.

I think that you may have a problem with the algorithm. Maybe you should
break some moves (which have a direction change) into several seperate
moves.
As I anderstand the CV algorithm defines the way in which the path is
generated at the end of each command.

Thanks, Isak.

Show quoted text

----- Original Message -----
From: "Art" <fenerty@...>
To: <mach1mach2cnc@...>
Sent: Tuesday, August 26, 2003 1:20 AM
Subject: Re: [mach1mach2cnc] stepper stall (to Art)

Isak:

   . You need to decrease your acceleration to about 1 or less to do this
test. Does the axis slow down to stop, then backlash correct, then
accelerate again?  I'm just trying to figure out if the algorithms are
working correctly... An acceleration of 10 is NOT small, it means 1 sec to
get to 10 inches per second. While this is not overly fast, it may be too
fast to tell me what I need to know.

Thanks,
Art
www.artofcnc.ca

To unsubscribe from this group, send an email to:
mach1mach2cnc-unsubscribe@...

Your use of Yahoo! Groups is subject to 

Re: stepper stall (to Art)

Art

#570

Isak:

   . You need to decrease your acceleration to about 1 or less to do this
test. Does the axis slow down to stop, then backlash correct, then
accelerate again?  I'm just trying to figure out if the algorithms are
working correctly... An acceleration of 10 is NOT small, it means 1 sec to
get to 10 inches per second. While this is not overly fast, it may be too
fast to tell me what I need to know.

Thanks,
Art
www.artofcnc.ca

Re: stepper stall (to Art)

Art

#569

Isak:

 Let me check to see whats what. I'll get back to you...

Art
www.artofcnc.ca

Re: stepper stall (to Art)

Isak Levinson

#568

I've set the acceleration to 10 (which is rather small).
Then I issued a "G2 x0y0 i10 j0 f300" command from a x0y0 position.
It was very obvious that there is a sharp stop at each 90 deg.

There was no difference if I issued a G61 or G64 before the command.
Neither was no difference if I set CV on or off in the state menu.

If I turn off the backlash then all is ok.

Thanks, Isak.

Show quoted text

----- Original Message -----
From: "Art" <fenerty@...>
To: <mach1mach2cnc@...>
Sent: Monday, August 25, 2003 9:49 PM
Subject: Re: [mach1mach2cnc] stepper stall (to Art)

Hi Isak:

 Can you descibe this better. Is CV mode turned off, does the unit stop at
each 90 degree boundry of the circle? Have you tried setting acceleration
very low to see the effect better?

Art
www.artofcnc.ca

To unsubscribe from this group, send an email to:
mach1mach2cnc-unsubscribe@...

Your use of Yahoo! Groups is subject to

Constant velocity/Exact stop

cnc_user

#567

Hi Art;

Are the G61 & G64 commands working?
On my machine they don't seem to be working but
setting constant velocity on state page does. 

Would it be possible to have a indicator led
that would show when Constant velocity is turned on,
either through setting on state page or with G64
under program control.

Thanks

Bob Harvey

Re: Mach2 verify problem

Art

#566

Derek:

 On mine, all three axis do the verify. Can you double check the status of
the home LED's on the diags page, does all look normal?

Art
www.artofcnc.ca

Re: RC12 Lathe threading test

Art

#565

Steve:

   What are the Normal and current SpinCounts doing and what does the
netrance trigger say..

   The Normal and current Spin Counts are the number of interrupt period
between pulses from your index. They must be getting screwed up to affect
the Spin Adder so badly... Those numbers would be of great interest to
me....

Thanks,
Art
www.artofcnc.ca

Re: Mach2 verify problem

#564

--- In mach1mach2cnc@..., Art <fenerty@a...> wrote:
Derek:

 Do you have switches on all 3? I haven't used verify for some time, so I
will do a check.

Thanks,
Art
www.artofcnc.ca
yes i do

Re: Mach2 verify problem

Art

#563

Derek:

 Do you have switches on all 3? I haven't used verify for some time, so I
will do a check.

Thanks,
Art
www.artofcnc.ca

Re: RC12 Lathe threading test

Art

#562

Steve:

 Ouch, that sucks. But your desciption is very helpfull. I'll look in the
code to see what can cause this and let you know what I find. I like the
description of the adder, it will probably lead me to the trouble.

Thanks,
Art
www.artofcnc.ca

Re: Question for Art

Art

#558

Bob:

  Very soon an OEM macro will be created as well as seom more system
specific macro's. They are next on my list so hopefully by next version.

Thanks,
Art
www.artofcnc.ca

Re: M2 jump some lines

Art

#560

Daniel:

 Sorry for the problem, can you send me the actual file, sometimes its a
strange problem with the comments themselves. Send me the file and I'll
check it out right away.

Thanks,
Art
www.artofcnc.ca

Re: stepper stall (to Art)

Art

#559

Hi Isak:

 Can you descibe this better. Is CV mode turned off, does the unit stop at
each 90 degree boundry of the circle? Have you tried setting acceleration
very low to see the effect better?

Art
www.artofcnc.ca

Re: Not fully Zeroing positions - Mach2

Art

#561

Thanks Jeff:

   I'll let you know what I find....

Art
www.artofcnc.ca

Mach2 verify problem

#557

Hi Art
When I click on verify only the z axis moves. X and Y remain 
stationary but give out a count.

Derek

Re: Test Screen

#572

Hi:

 I just uploaded a file called 1024.set as a test screen 
layout. It is a simplified test screen of 4 axis and fewer 
controls now that primary development is to the point of 
cleaning up the screens.

Comments welcome...

Art
www.artofcnc.caArt,

It needs the Zero individual axis and Zero All buttons on the jog
screen. It does not need them on the MDI screen. For me the normal use
on a machine without home switches is to jog to the position I want as
the origin and then zero all. I can't do that on this test screen. When
in MDI mode I don't use the zero buttons, but instead do a G92 x0y0z0a0
if I want to zero all. 

As I am sure you are aware, I am also not an advocate of having jog on
the program run screen. I will just keep chanting to myself, modal,
modal, modal and deleting buttons as I go.

Tim
[Denver, CO] 
Beat the Sherline Oct 1 price increase, buy now! 
Sherline & Taig products at Deep Discount 
Mach1 & DeskCNC with credit card ordering 
www.KTMarketing.com/Sherline 
e-mail me at Timg @ KTMarketing.com for items not yet listed

RC12 Lathe threading test

Steve Blackmore

#556

Hi Art - bit of a disaster testing threading.

Program runs 10 increments, on first it pauses for ages - looking at
thread diags, spind adder climbs into the millions, then goes negative
and spindle starts, but correction is over compensating and it slows
appreciably. On each sucessive attempts it goes slower and slower
until it stops.

Actual spindle speed when not threading is within 10rpm (worst case)
of selected speed.

--
Steve Blackmore

Question for Art

cnc_user

#555

Hi Art;

Have you given any more thought to being able to execute
a OEM code from a macro call?

Thanks

Bob Harvey

Re: Post Processor for Mach2

Robert Campbell

#554

Luis,

Try the Fanuc post.  If you have a problem, I should be able to create a
special post.

Bob Campbell

Show quoted text

----- Original Message ----- 
From: "Luis Serrano" <serrano@...>
To: <mach1mach2cnc@...>
Sent: Monday, August 25, 2003 1:46 AM
Subject: [mach1mach2cnc] Post Processor for Mach2

Hi all,

This is an easy question for all of you. I just purchase a
Visualmill 4.0 from Bob and I need to know the better post to be
used for Mach2. I cant see anything generic in the list.

Thanks for your help.

p.d. I have also tried to find this answer in the other forum
archive but failed.

Luis.

To unsubscribe from this group, send an email to:
mach1mach2cnc-unsubscribe@...

Your use of Yahoo! Groups is subject to

Re: Home/limit switches reset/recovery problem Mach2/RC11

Daniel Maioli Padua

#553

--- In mach1mach2cnc@..., "mehmetgogus2003" 
<mehmetgogus@d...> wrote:
Hi all,

I want to use home/limit switches to zero machine coordinates. I run 
into them causing them to trigger, however I can't move backwards 
because the switches remain in triggered state, and Mach2 would not 
let me move/jog. Hi Mehmet,

Try OverRide Limits at Corrections page.

Rgrds,
Daniel.

开云体育