Sanyo Denki stepper motors

[m_c]

Back to basics, have you used sheilded wiring, and tried to keep power and control wire routing as seperate as possible?
And avoided having them run randomly across each other?

[djk]

Sheilded wiring and power, control wires are seperate,a clean control box

[Swarfing]

Make sure your shields are only connected at one end of the cable?

[m_c]

I did have a link to a document that detailed grounding/sheilding, and how things should be wired, but I can't find it.

Have a read over this thread - GROUNDING - what is the correct way to ground a CNC machine?


Found it - http://www.automation.siemens.com/do.../emv_r.pdf?p=1
Might take you a few reads to digest all the info, but explains things pretty well.

[djk]

Shields are only connected at one end of the cable and the earth is connected to the mains earth.
Thanks for the doc

[djk]

Ok, ripped every thing out of my control box and tested the drivers.
I have 100VAC on the earth and 230V on R+ of the motor connection.( the 3 drives)

[m_c]

Is that with the earth connected?
If it is, I'd be checking the earth on the socket you're using to power it.

[djk]

No just the P&N.
Im taking the measurement from the mains earth to the earth pin on the driver