The Shop > Tools
micro mill electricals problems, help please!!
bertie_bassett:
im thinking that it may still just be the board that's at fault here, it may well have been what actually failed last time and caused the sparks at the motor end.
personally Id persevere with it, but i'm stubborn and hate getting new things when Im sure they can be fixed, plus have equipment and tools to test with.
pmdevlin:
I just called arc euro, who where very helpful, to see if they have returns, refurbs etc that might help. They have offered for a nominal cost to test both motor, and controller actually on machines, so they will be at a working environment. Then will call me to review what faults I have, and what it will all cost, then I can decide on course of action, as Bertie says, it might just be the board, and as Stuart says, no point in throwing £200 at this
steampunkpete:
--- Quote --- ... all was well for a few minutes, then one leg of the fet sparked ...
--- End quote ---
Showing my ignorance again; would a FET actually spark if it failed? I've seen an i.c. with a crater in the top after a stupid amount of power was put through it, but am unaware of transistors sparking when they failed. I could quite imagine a spark at a dodgy solder joint though.
pmdevlin:
yeah it was a spark that was visible even under fluorescent light, on one leg, then after turning off and back on, another leg was emitting what can best be described as a glow!
vtsteam:
That could have been a bad solder joint.
edit, oh well re-reading, a glow is not just a spark, nevermind.....
edit2, well re-re-reading, maybe spark from bad solder joint came first, then glow on powering up afterwards due to resulting circuit fault?
Anyway, nice of the distributor to try to help, and they will certainly figure it out....
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