I changed out all the original drives because DMM told me it was a software problem and sent me 4 replacements!!!!!
What is so hard to understand about that?
I contacted the company, described a fault and then followed their recommended course of action.
Has anything that has followed proved that the wiring was at fault? No. Could the wiring of been the issue? I suppose, hence why I have changed it!
The recommendation of only sending back the damaged/faulty drives is what I have been asking DDM for the last week with no reply and is why I have consistently asked about your affiliation. The answer to which you have only just given me (you'd previously stated that you make some prototype parts for DMM and not that you directly represent them).
I'd also like to point out that in the first replies to this thread you stated that you had never seen this issue before yet now you are categorically stating the reason for this fault.
I'm not completely clueless to electronics, yes I did miss the fact that the drives have no isolation and that tying the grounds together could then cause noise and spikes on the drive input wiring.
But tying signal/earth and chassis grounds together is a common practice to avoid noise issues (granted in this case with non-optoisolated drives it was incorrect).
However I don't think its far fetched to believe that the consequences to this incorrect grounding would be either killing a drive dead or killing the input pins. And not causing random EEPROM issues.
Whatever you say you cannot deny that I have been told that this is a software issue.
Could it be the wiring yes. But I do not want to be in this situation again.
I question how you have come to such a categorical decision as to the reason for this fault without ever seeing it before and whilst at the same time dismissing what the manufacturer has already told me?
All that being said I have changed out the faulty drive with the old X axis driver and so far no problem.
Hopefully I wont have to pull it back out when DMM come back to me.
FYI, I CAN UNDERLINE THINGS TOO!