Different max velocity

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?

Can you post your hal and ini files?

Sounds like the Z axis velocity is not being set properly

As requested

in the [TRAJ] section,
change MAX_LINEAR_VELOCITY=
to MAX_VELOCITY=

and try that

Chris M

That works but it ignores that max velocity is lower on Z.

Are you sure you dont have rather crazy max velocities?

8000 mm/sec sounds a bit scary to me

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

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

can you post your config's .pncconf file so I can investigate.

Thanks Chris M