My plan to install the new rectifiers in a twisted orientation to make up for the incorrect pin out worked. After cleaning the heatsink and the IGBT's with IPA to remove the heat transfer compound I applied fresh and reassembled. It turns on but makes a funny crackling sound, turns out this is normal according to some forum posts (one by a Hypertherm employee).
Tomorrow I hope to sort out a proper high amp socket so I can see if she cuts. Will also find out for sure if the softstart relays are switching because if not the NTC resistor is toast!
Almost there now, I hope!
Limited workshop space, unlimited interests... "The Littlest Workshop" the bastard child of "The Little House On The Prairie" and "The Littlest Hobo" TV shows. My interests include EDM, CNC, Camping, injection moulding, welding, inventing, casting, bushcraft, composites, 3D printing, micro-RC, ornithopters, optics, microcontrollers, Ukulele, lock picking, cycling, safe cracking, motorcycle restoration ... Maybe tomorrow my projects will be finished?
I didn't know that India Pale Ale worked as a solvent!
ReplyDeleteDissolves your worries and the liver at least! (IsoPropyl Alcohol)
ReplyDelete