Mine just failed.
Fairly certain its the primary of the transformer but a schematic would certainly help.
Anyone found one?
Anyone know of an alternative controller for the existing motor of a 220v X2 mill
Thanks for the link! I will use it when I give up on trying to repair the board. At this point I'm selecting new N-channel power MOSFETS from International Rectifier. I'm not sure which is more important, power dissipation or Vds.
IR doesn't make 500V and 600V MOSFETS anymore. I'm probably dealing with a poor circuit design anyway (my first clue was the early failure).
Here's a link to the schematic of the thru hole FC350 http://anivo.com/reed/G8689_cont/g8689_cont.htm The surface mount version is the same circuit with surface mount components and the pwm geneartor on the main board rather than on a daughterboard. In the UK you can get the KB electronics controllers used by Real Bull and Weiss from amadeal. Much more reliable than the Sieg controllers and give more torque at low rpm.