Sanyo Denki stepper motors

[djk]

With just one driver conected the problem is stil there.
The high voltage side is wired correctly and control is
The negative side of each PLS and DIR input to BOB ground
PLS+ to step
DIR+ to direction
Getting ready to throw every thing out and get a closed loop stepper system

[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.