[Sterob]

Thanks John,
That makes sense.
I will have a play and see how I go.:cheers:

Steve

[Sterob]

Hi John,
I've had some success today. I used your wiring, and had to change the output high/low setting in Mach 3 as you said.
Its working but its not very accurate. I can get *one* point accurate but not *all* of them. I do not seem to be able to get the full 10v output as well. Not sure whats going on yet. Maybe I'm not getting the full 5V for the PWM signal. I'll check tomorrow.
It all suggests the VSD is outputing what it is being asked to. Voltage is low so the output speed is low.

I've tired calibrating the output at mid scale as well as full scale but that does not work. it shifts the error but doesn't fix it either. I wonder if I can use the 10V output from the VSD to step down to 5V for the input?
The AKZ250 getting is power from the USB port so maybe I am drawing too much current...dunno,
The AKZ250 documents say the board can be externally powered but does not say where form. I assume via the 5V & Ground terminals adjacent to my speed signals come from.
Will do some more testing tomorrow.
Steve

Attachment 381898
Steve