Quote from mc-maniago.it on 26 March 2025, 17:03

Hello again,
as mentioned in https://en.cs-lab.eu/forum/topic/z-axis-loosing-steps-on-a-maho-mh-600-t-simcnc-and-delta-drives, I am now trying to get the glass scales work with the system (at least on the two Axis that don't have any backslash).

My machine is mounting Heidenhain LS 403 glass scales with a sinusoidal output signal. I've bought from the system reseller a sinusoidal to ttl converter to have them work with the CSMIO, and I've also sent to them the glass scales to be checked among with the converter in question: they are said to work perfectly.

The glass scales have a grating period of 20μm, that I believe means 50 "pulses" every mm; pulses that become 200 for SimCNC due to the A-A/ B-B/ (or at least this is what I've understood). In any case, whether I put 50 or 200 or 5000 in "pulses per unit", when I start the autotuning the Axis keep going only in one direction and doesn't do the classical back and forward; but it starts with little movements and then keep increasing them, slowing down or stopping instead of reversing until, after a while and not always, we can say at random, it start reversing and keep increasing in the opposite direction, then it fails or I have to stop it because it is too near to the limit. (here you can see a video ).

Everything I was suppose to do was: move the axis in a confortable position, switch the cable from the drive encoder to the glass scale output and start the autotuning. But it never worked...

Any suggestion would be really appreciated
Regards