Thread: how to bypass dremel tool internal variable speed control?
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Claude Desjardins Claude Desjardins is offline
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Default how to bypass dremel tool internal variable speed control?
wrote:
I'm on my second electronic variable speed control inside my Dremel
model 395 tool. This one just crapped out with the same temperamental
symptoms as the last one. I need to use the tool tomorrow night, and
would like to bypass the internal variable speed circuitry to simplify
it; maybe buy an external control later.

There aren't any wiring diagrams I could find on the Dremel site. I'm
thinking if I had one for the model 275 tool (single speed) and the
395 (electronic variable speed), I might be able to make the 395 into
a 275 by just jumpering some wires. I'll probaqbly need to at least
retain the variable speed assembly, since the brushes fit into it.

Can anyone help?



Hi

Just take it apart, I'm pretty sure it's just a "potentiometer"
(variable resistor) so it would only have 3 leads, one from the external
wire to the pot., one from the pot to the motor, and one from the other
external wire to the other lead of the motor.

Cut things off, plug the external leads directly to the motor.

You can make yourself something that would do the same with a variable
light controller (those you have to control your house lights) Get one
of these, one wall plug unit and one extension cord.

PWR IN (1) to VARIABLE (1)
VARIABLE (2) to PWR OUT (1)
PWR IN (2) to PWR OUT (2)

it would be an awesome idea to tape everything together to cover the
connections once you're done so you don't get shocked everytime you want
to slow it down or speed it up

Have fun


(PS I also have one of the new Dremel units and it smokes too ... Uh.)
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