Friday, 18 May 2012

Rectifiers in

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!


  1. I didn't know that India Pale Ale worked as a solvent!

  2. Dissolves your worries and the liver at least! (IsoPropyl Alcohol)