RE: [CAD_CAM_EDM_DRO] Dead encoder???

Hi Marcus

There seem to be several suggestions that heat in the servo amp may be part
of the problem.

You can get temperature sensitive labels, which latch when a temperature has
been exceeded.

Popping a few of these on the servo card heatsink areas might help give you
some indication to temperature, especially short term hot spots.

Most electronics suppliers do them



Regs Mark

_____

From: CAD_CAM_EDM_DRO@yahoogroups.com
[mailto:CAD_CAM_EDM_DRO@yahoogroups.com] On Behalf Of Marcus
Sent: 15 October 2006 06:23
To: CAD_CAM_EDM_DRO@yahoogroups.com
Subject: Re: [CAD_CAM_EDM_DRO] Dead encoder???



Hi Jon:
My next plan is to move two axes together and see if I can make it fault
that way.
Since the problem began, it's typically run for an hour before faulting.
The cutting load was very low (3/64" dia ball mill, 0.002" DOC, 8000RPM, 20
IPM finishing cut in Tellurium copper).
The EDM electrode I was cutting involved complex surfacing, so all three
axes were in motion together, with lots of short moves and direction
reversals.
Todays testing was air cutting only, one axis at a time, slow feedrates and
relatively long moves.
Jon, I really appreciate the time you're taking to help me sort this out.
Thank you!
Cheers

Marcus





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