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08-11-2017 #11
Problems my PSU stopped working (Possibly unrelated but one of my AM882 had a solid red light the other 3 flashing green, I wonder if this had something to do with it or if I have a bad AM882).
99% certain it can be traced to a short I caused at weekend when electrician set my ameter up wrong and I shorted across my PSU output never realised it'd done this damage.
They were plugged into the left connectors I just cut the wiring put new terminals and tried it in the terminals next door to see if I had gotten lucky but I hadn;t.
There was a pop/bang and spark from roughly where the capacitors are.
I've ordered 3 new capacitors and a new rectifier (Sure this is fine but £1 so just did it) and replacement barrier terminals.
What's the best way to test the transformers to make sure it's ok? I was thinking unplug the capacitors and then test the voltage going into the rectifier in AC mode to see what I'm getting and then test the output of the rectifier in DC mode to see if that's working does this sound like a plan?
Do you think I might have damaged my AM882's (I really hope not can't afford to replace this side of xmas)? And if I have a bad AM882 will be fun trying to sort with the Chinese (Bought 2nd hand) and will have to put a temp cheap driver to get going whilst I source a replacement.
I can afford to replace one Am882 but not 4.
How do I discharge the capacitors before I unsolder them to replace them and also how do I test which one(s) blown?
I just realised I have a picture of my AM882 that was always red and it was green last week!
Since I have AM882h could I not ditch the rectifier and capacitors altogether and just connect the output of the transformer (50v) to the drivers?Last edited by Desertboy; 08-11-2017 at 05:36 PM.
http://www.mycncuk.com/threads/10880...60cm-work-area My first CNC build WIP 120cm*80cm
If you didn't buy it from China the company you bought it from did ;)
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