[HankMcSpank]

Hello,

Does anyone have a schematic for the DC motor speed control board that is shipped with the Sieg C2A300 mini lathe ...I'd rather repair the broken board I have vs buying a new board!

tks,
Hank.

[AndrewE]

The following site will repair the board for half the cost of a new board.
http://www.repaircontrol.com/

http://www.repaircontrol.com/SCRControl.htm shows a basic diagram, but I have not yet found a circuit diagram.

http://www.mini-lathe.com/Mini_lathe...ot/trshoot.htm says the Mosfets are the likely culprit. Simply replacing both of them may fix the problem.

If you ever do find the circuit diagrams, let me know.

[HankMcSpank]

Many thanks...just to give some closure here - that board was completely toast ...the Ebay seller was very shrewd - he didn't say it was completely nuked & only photographed it from the top - which looked fine. However when I saw the bottom, it had obviously been subjected to a major amount of voltage/current - all the silicon was short - many of them melted - some PCB tracks gone & the board swollen around many tracks. I picked up a Danfoss DC motor control board for £20 - which isn't meant for the Sieg but was cheap enough to spend an hour or so adapting!