Different max velocity
06 Jul 2015 20:50 #60471
by thewho
Different max velocity was created by thewho
Hello
Had some trouble with high following error on my Z axis and found out that Linuxcnc ignores "Z max_velicity" when doing manual rapids. Or if I increase jog velocity above Z max.
I'll lower "MAX_LINEAR_VELOCITY" for now but I would like to have X&Y at their max speed.
So what am I doing wrong?
Had some trouble with high following error on my Z axis and found out that Linuxcnc ignores "Z max_velicity" when doing manual rapids. Or if I increase jog velocity above Z max.
I'll lower "MAX_LINEAR_VELOCITY" for now but I would like to have X&Y at their max speed.
So what am I doing wrong?
![:silly: :silly:](/media/kunena/emoticons/silly.png)
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06 Jul 2015 22:31 #60474
by PCW
Replied by PCW on topic Different max velocity
Can you post your hal and ini files?
Sounds like the Z axis velocity is not being set properly
Sounds like the Z axis velocity is not being set properly
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06 Jul 2015 23:33 #60476
by thewho
Replied by thewho on topic Different max velocity
As requested
![:) :)](/media/kunena/emoticons/smile.png)
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06 Jul 2015 23:56 #60479
by cmorley
Replied by cmorley on topic Different max velocity
in the [TRAJ] section,
change MAX_LINEAR_VELOCITY=
to MAX_VELOCITY=
and try that
Chris M
change MAX_LINEAR_VELOCITY=
to MAX_VELOCITY=
and try that
Chris M
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07 Jul 2015 01:50 #60481
by thewho
Replied by thewho on topic Different max velocity
That works but it ignores that max velocity is lower on Z.
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07 Jul 2015 02:25 #60483
by PCW
Replied by PCW on topic Different max velocity
Are you sure you dont have rather crazy max velocities?
8000 mm/sec sounds a bit scary to me
8000 mm/sec sounds a bit scary to me
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07 Jul 2015 02:42 #60486
by thewho
Replied by thewho on topic Different max velocity
Well that seems like a funny pncconf bug
(probably my fault for not reading something right
)
That surely fixes my problem, gonna try it tomorrow
![:lol: :lol:](/media/kunena/emoticons/grin.png)
![:blush: :blush:](/media/kunena/emoticons/blush.png)
That surely fixes my problem, gonna try it tomorrow
![:) :)](/media/kunena/emoticons/smile.png)
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07 Jul 2015 02:45 #60487
by cmorley
Replied by cmorley on topic Different max velocity
ahh yes I see now - Peter has a point.
in the AXIS gui looks like you asked for MAX_LINEAR_VELOCITY = 133.334 or 8000 mm per minute
in the z axis: MAX_VELOCITY = 8000 or 48000 mm per minute
in the other axes MAX_VELOCITY = 10000 or 600000 mm per minute
so effectively even at max jog velocity that the gui will allow you to select, you are never even close to the axes max velocity.
seems likely the axis max velocity were entered as units per minute rather the the require units per second.
This config was built with pncconf have you hand edited it? what version of linuxcnc are you using?
Chris M
in the AXIS gui looks like you asked for MAX_LINEAR_VELOCITY = 133.334 or 8000 mm per minute
in the z axis: MAX_VELOCITY = 8000 or 48000 mm per minute
in the other axes MAX_VELOCITY = 10000 or 600000 mm per minute
so effectively even at max jog velocity that the gui will allow you to select, you are never even close to the axes max velocity.
seems likely the axis max velocity were entered as units per minute rather the the require units per second.
This config was built with pncconf have you hand edited it? what version of linuxcnc are you using?
Chris M
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07 Jul 2015 02:47 #60489
by cmorley
Replied by cmorley on topic Different max velocity
can you post your config's .pncconf file so I can investigate.
Thanks Chris M
Thanks Chris M
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