On Monday, September 22, 2014 4:43:37 AM UTC-7, ADRTE wrote:
> I Have A Ryobi R163 Router And I'm Looking To Add A Speed Control Unit
> To My Router Table To Use With It. I've Read That In Time Some Speed
> Control Units May Ruin The Router Motors.
Speed controls for universal motors (the kind with brushes) are useful,
and relatively easy to build. The simplest (but not the cheapest) is
a vvariable autotransformer (Variac, Powerstat, lots of other brands).
A ten-amp unit will cost $200 or so (and will be useful for many other
tasks). Heavy, expensive: not a great solution.
Easier, is an electronic switching version, and many routers have
such systems already built in. Buying a second router is the easy
fix here.
External 'dimmer box' type speed controls are available, BUT they aren't
generally considered good practice, because they're not sized for
the motor, and because the switched signal generates RF hash.
I've seen these in the $10 to $50 range, but they are all 'buyer-beware'
items, IMHO. You MUST NOT USE A LIGHT DIMMER, that 'resistive
load only' warning is serious.