[Shop-talk] Need to find a speed controller for a 220v 1hp motor

[eric at megageek.com]

Actually, I have a treadmill motor.  But how do I slow that down?  (I 
don't have any of the treadmill.)

I can get another one if I need the whole thing.

Thanks!


Sent from my Commodore 64 on a 2400 Baud Modem.
Tech Viper
"Be as beneficent as the sun or the sea, but if your rights as a rational 
being are trenched on, die on the first inch of your territory." Ralph 
Waldo Emerson 



From:   "Randall" <TR3driver at ca.rr.com>
To:     <eric at megageek.com>, <Shop-talk at autox.team.net>
Date:   12/10/2017 21:28
Subject:        RE: [Shop-talk] Need to find a speed controller for a 220v 
1hp motor



I think you're probably going to have to find a different motor for it.

Most single phase AC motors are simple induction motors, and they don't 
like
being slowed down much.  You might be able to get 20 or perhaps even 30%
without losing too much torque (or having the start switch close); but for
cutting metal on a woodcutting bandsaw, you're probably looking for more
like 90% reduction.

Another option might be to add a jack shaft and pulleys to step the speed
down.  ISTR several articles in HSM on that topic.

As a side note, there are lots of tread mills (exercise machines) being
thrown away with perfectly good 1 or 2 hp DC motors in them.  Generally 
it's
the controller that fails, not the motor.

-- Randall 


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