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Old Tue 26 June 2012, 08:38
Just call me: Kart
United States of America
pmdx 133 fried

2 boards same place. These are at the x and slave motors. PMDX thinks it might be a part failure. Anybody else seen this? Comments?
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Last edited by Kart; Tue 26 June 2012 at 08:41..
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Old Tue 26 June 2012, 09:15
Gerald D
Just call me: Gerald (retired)
Cape Town
South Africa
If your motors hadn't turned before, and the burn happened at first attempt to power motors, then I think your motor wiring is incorrect and something had to give.

Did you unplug the green connectors off the board? If you do this too many times, the friction grip loosens and could start a burn point.
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Old Tue 26 June 2012, 09:48
Just call me: Danilo #64
Novi Sad
Lots of dust... fire hazard

the wires look like they'r cooked, so it must have been some "short". Do drives still work?
might been that they put out some voltage across those wires
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Old Tue 26 June 2012, 09:53
Just call me: Mike
Columbiana AL
United States of America
How are your motors wired at the other end of the cables?

This shows the pairing for parallel configuration. (Of course this is during the table project and your pairs will be out on the end of your wires at the motors.)

Also I agree you need to check for a short somewhere in the wiring.

What part number wiring is that?
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Old Tue 26 June 2012, 09:56
Just call me: Danilo #64
Novi Sad
oh.. haven't seen that its a Motherboard for Geckodrive. That those are the wires directly to the motors. Something really wrong happened here
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Old Wed 27 June 2012, 04:58
Just call me: Andrew (Duckie)
new south wales
133 wiring

huge current there, are there any other motors hooked up and working? please give us more info like, power supply, motors, when it happened first power on or during use? open the drive and see if there is any damage visible. might give clues
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Old Wed 27 June 2012, 07:30
Just call me: Mike
South Jordan, UT
United States of America
Unless the PMDX-133 was defective, it looks to me like a wiring error occurred. The wiring diagram (Table 2 in section 3.1 of the PMDX-133 manual) shows how to connect the wiring for the A, /A, B and /B connections to the Gecko stepper drives.

To get enough current to produce the kind of heat that caused that much damage means that a short occurred somewhere. I cannot imagine that Steve at PMDX would not have tested his products before shipping, especially something as obvious as a dead short between terminals. It could happen, but I've never seen that kind of error escaping quality control.
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Old Sun 19 August 2012, 13:18
Just call me: Jason
United States of America
Get the multimeter out and see whats going on.
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