Stepper motors and linear scale closed loop setup?

Tuned and tested in the video.



Now the Y axis.

Finishing off the X axis. Aligning the reading head, mounting the cover.
Another of these un-polished videos that show every detail.

Hi Peter.
Re: PID command-deriv pins on all stepgens
Could you elaborate a bit more on this?
Does it apply to open loop PID setups, or both open & closed?

I am on LCNC V. 2.7.14

Thank you!

Ray

The Y axis is now done. The Y axis is in poor mechanical shape with a backlash of 0.2-0.3 mm.
Nevertheless I test to see if the encoder can improve things.



I think the result was interesting, although not perfect. The Y axis will be rebuilt later on.

I test the stepper motors' resolution and try to see if that has an influence on the following error.
The locking screw from from the video is finally added.

Prepare a BK15 bearing block with angular contact bearings for use on the Y-axis.
This will, when mounted, improve backlash and stiffness in the Y-axis.