Mach3 VFD PWM signal...

[Graeme]

Make sure you don't have the lead plugged into the current connectors marked "A" or "mA" - For voltage they should be plugged into "COM" and "V". Its very easy to forget.
Graeme

[Clive S]

Make sure you don't have the lead plugged into the current connectors marked "A" or "mA" - For voltage they should be plugged into "COM" and "V". Its very easy to forget.
Graeme

Yes but good meters don't let you do that. But good point. Dave: By capacitance I meant from the leads they act as a capacitor if they are very close.

[Davek0974]

Thanks guys,

Definitely on the volts, this meter only has three sockets - V/mA, Com, 10A and i only used the Com and V/mA ones 99% of the time.

I can't see lead capacitance having any effect here, surely it should be a measurable 0 to 10v Dc signal going to the VFD?

I know 4-20mA can be a pain to measure sometimes unless its loaded properly but 0-10v?