Mesa 7i77 and linear encoder tuning PID.

P=5 zoomed

sorry ... P=5

P=50

P=50

OK so even with a gain of 5 its unstable (this is likely the velocity loop in the drive)

New drives ...?
New servos ......?
Weeks of re-engineering mountings for different servos – I could cry!

It really sounds like there is some filtering in the drive that needs to be turned off

I’ve systematically y gone though turning things on and off, gradual changes in most of the parameters that seem to be relevant, eliminating what seems to be relevant and what’s not and nothing seems to make any difference.

Maybe an email to Omron ......

Maybe an email to Omron ......

May you give me a link to the PDF user manual of this servo to see what can i do.. I do not promise you anything
It will help if you simplify the system using only the encoders of the motor (LinuxCNC => Mesa card => Drive => Motor. Motor encoder => Drive => Mesa card => LinuxCNC) instead of adding the linear scales.
It will help also if you could get the software to auto tune the drive (without conection to the mechanics)

Some bed time reading VNR .... www.f1-2000.co.uk/Datasheets/omron-reduced.pdf


Thank you so much ......


If you look at this page,

www.f1-2000.co.uk/index.php?f=hardinge_hxl2

You’ll understand my woe with regard to changing motors!