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Hi, Thanks for your further development. I have been away from Ethercat for a long time. In the past I have been experimenting with designing a +-10V PWM for my analog spindle. It works but I have not tested it in practice. I will add this circuit to the Ethercat board. 

Or just pull again - I got it fixed.

One step closer. mmmm. motors being so much smaller gives a lot more room in the enclosure too which is nice.
Z has no brake, but being shorted to the resistor in the drive lets the spindle drop very slowly now, so nothing bad will happen from a sudden power cut. now... to make it run!

 

I see the basic problem.
The original vismach updates every 100ms but only if something changes.
Qtvcp updates every 100 ms no matter what.

I'm looking into what library options there are to correct this.
In the mean time, you can increase the buffer in qt_vismach.py
look for:
self.plotlen = 16000

Not sure what all types of laser heads this will work with but I'm about to stick a diode laser on a PnP machine I built but shelved. I'll be doing that in the next few days, I could stick this thing on it while I'm converting it over if that's the type of testing you're looking for.

I use a custom carrier board for a Mesa 7i92. Not sure what other kind IO capabilities that thing has but I think the only suitable input I have is an "SmartSerial" port. That's a 2.5Mbaud RS422 port which is what people tend to use around here for stuff like this since Mesa cards are the king of the hill. I could also swap the RS422 transceiver for a dual RS422 receiver to make it a quadrature encoder input.

If you are using a custom .ui file then load it in designer and save it again.
If you are using a default .ui, then pull again, the fix has been pushed.