Problem is, routers almost always use series-wound motors (with
brushes), while every bench grinder I've seen uses an induction motor
(no brushes).
Induction motors take an entirely different type of speed control than
series-wound motors. You may be able to achieve a small variation in
speed with your router control (like maybe a 20% reduction from full
speed, with a larger reduction in power), but any attempt to slow it
more will likely result in burning up the motor, the control, or both.
Many grinders, etc. use a starting winding with a centrifugal switch,
which I think will make it pretty much impossible to use a speed control
without modifying the motor.
Randall
Richard Beels wrote:
>
> Anyone ever used one of those $40 RSCs that Toolcrib sells to slow down a
> bench grinder, polisher or wet grinder instead of a router?
>
> It claims to "reduce speed electronically without reducing torque;
> electronic feedback maintains speed by increasing voltage to motor as load
> increases. Adjustable speed from 0 rpm to full speed. Full power & torque
> at all speeds. Works with routers 3-1/4" HP or less. 120-volt,
> 15-amp. Does not work with soft-start routers." Has a 3 position switch
> (variable, off, full speed).
>
> I'm thinking that it should be fine because how does the darn thing know if
> you're using a 1/2 HP bench grinder or a 2 HP router. Start up draw
> shouldn't be too high to fry it, I think....
>
> Cheers!
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