Retrofitting a 1986 Maho MH400E

I got the EXE 602D wired up to the Z axis encoder. It is working fine with the output scale correct. I am having some trouble with the PID tuning, but will sleep on it.
Mark

Dumb question, but how do I reverse a servo axis? Z is moving reversed. Going up when it should go down.

Running this slow (0.2 output scale) moves smoothly and moves the correct distance, up to 1mm when commanded, but the following error is moving out to 1mm, and then slowly returns once the axis stops.



Mark

RotarySMP wrote: Dumb question, but how do I reverse a servo axis? Z is moving reversed.

Change the sign on the encoder scale so that the counter counts in the right direction, and then _also_ swap the sign of the PWM (or analog) output scaling.

Thanks Andy, that makes the motion sense correct, but I still have the following error = distance moved. The encoder is working and the 1mm move stops after exactly 1mm,

Cancel that, it was a HALosci user error. Now I have a usable setup and can continue with the PID tuning.

PID tuning Z went smoothly, once I relearned the use of the HALOscilloscope. The Z reference mark of the Heidenhain is at the bottom of travel and it's set up worked first time.

So it was time to crank it up and and make some chips...



Way cool machine, if a little scary for someone who has only ever used smaller machines. It sure blasts chips everywhere, so I'll need to get some replacement X waycover bellows, and install the housing before I do any serious work with it.

There is still a fair bit of work to do, to finish wiring the user control module and get all the buttons and knobs working.
Mark