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Dremel scroll saw speed control board
"James Sweet" wrote in message
news:eGGvf.455$ww5.161@trnddc01... wrote: My first action would be to contact the mfgr and see what replacement parts are available and costs, etc. Also ask for a schematic. Try Googling on the model number. H.R.(Bob) Hofmann If they sanded off the numbers they most certainly won't supply a schematic. I'd first suspect cracked solder joints, if those are all ok then look into the power component, almost certainly a triac which controls power to the motor. If all else fails you could build a new speed control from scratch, they need not be very complicated. J is correct ... of components - look first at the Triac .. most TO-220 versions are 400 V or 600 V models at no more than 4 to 8 amps. gb |
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