Re: [CAD_CAM_EDM_DRO] How to blow a Gecko 320

Here's how to blow a 320....don't check the brand new stepper motor brush
wires for shorts to ground :-)
The motor ran fine on the bench, then "let out the smoke" of the Gecko in
short order when installed on the machine.
Result: (1) of the PMOS transistors was blown, cost a whole $0.95 from
Allied Electronics. Installed it in 2 minutes and within 5 minutes running
fine - AFTER fixing the short circuited brush wire. Sometimes things just
work out fine....
Regarding shutdown method...I installed (2) DC circuit breakers on my power
supply, accessible from the front - they power the 2 big DC supplies for the
motors...use them to remove the power after hitting the emergency stop
switch to pull the ERR/RESET line on the gecko low.


R. William Kichman, P.E.
Kichman Engineering Associates
103 Old Furnace Road
Cornwall, PA 17016-0643
tel/fax 717/270-0714

----- Original Message -----
From: "cnchomeman" <cnchomeman@...>
To: <CAD_CAM_EDM_DRO@yahoogroups.com>
Sent: Tuesday, July 22, 2003 10:19 AM
Subject: [CAD_CAM_EDM_DRO] How to blow a Gecko 320


> I haven't yet. I am wondering how to best shut down my machine.
> Right now, I just shut down the AC power, which shuts everything down
> at once. Is this safe? Is it better to disable the geckos first by
> taking the err/res pin to ground?
>
> Eric
>
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