ok, you asked. these are triac based controls that duty cycle modulate the
input AC power - basically they delay the turn on of the AC to the motor
until a desired phase angle is reached - the later the turn on (each half
cycle) the less power is delivered to the motor. It's the same as a lamp
dimmer, but with a few parts (and a more rugged triac) to accommodate the
reverse voltage from the inductance of the motor. I have a few spare
controls scrapped from drills - if you want one, I'll send you one for a
couple of $$ postpaid.
"James P Crombie" wrote in message
...
I can't vouch for their use on a drill, but I bought my dad one to use
with larger bits in his 3hp router. Seems to work well with the router.
Jack Erbes wrote:
Someone asked if this router speed control would be okay to use with a
typical non-variable speed 1/2" drill motor (5 Amps or so).:
http://www.mlcswoodworking.com/shops...l/pages/speedc
on.html
I called to get a little more info and the seller says that it is for
use with "brush type motors of up to 15 Amps" and that it is a
"voltage sensitive device that maintains constant torque".
If I understand it right, this must do more than simply drop the
voltage. I wonder if this is like a VFD in that it can vary speed
without overheating the windings? Anyone want to venture a guess on
how this works?
I'm reluctant to tell someone to do something that might fry their
drill motor. If it works as they say, for $24 and free shipping, I
might get one myself.
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James P Crombie
Summerside Machinist
Prince Edward Island Amateur Astronomer
Canada 3D Designer
E-mail
Astronomy webpage http://www.jamescrombie.com
Rhinoceros 3D webpage http://www.jamescrombie.com/rhino/
Mirror Grinder page http://www.jamescrombie.com/pics/
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