Quote Originally Posted by paulus.v View Post
..and finally making chips after a 3 year journey! Congratulations!

I would be grateful if you could measure the stiffness in the x and y directions.

What breakout board/ controller are you using? Does it have optocouplers on the inputs? I had the same problem feeding 24v signal to 5v bob. In my case the signal was fed to the optocoupler through a current limiting resistor with a value calculated for 5v input. I just had to replace the resistor with one calculated for 24v.
Thank you Paulus. Great to have it working like it should.

I was planning to measure the stiffness and compare to my old machine, plus a typical commercial stiffness. Depends on when I can get another slot in the workshop. Probably a bit rude to do it when the in-laws are here - although . . .

The breakout board was free with the drivers and is very basic. I think it is called a DB-2505. ?
From memory it has black chips near the inputs which I always assumed were optocouplers. Replacing the resistor sounds interesting.