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motor reverse

Peter Whitehead

Nov 29, 2015
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Nov 29, 2015
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I need to put a new motor on my little lathe, looking round i find a sewing machine motor is about right. they come with a foot speed control, can it be made to reverse easily, i am a novice so please keep the answer simple!
thank you
Peter
 

BobK

Jan 5, 2010
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You want to match the speed (RPM) and torque of the original motor.

Bob
 

Minder

Apr 24, 2015
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What do you call 'Little'?
Small/older sewing machine motor are usually Universal motors and rev pretty high.
Also IF it is a Universal motor, you have to swap the field windings WRT the armature to reverse.
M.
 

Peter Whitehead

Nov 29, 2015
2
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Nov 29, 2015
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Hi Bob, yes the torque is the same & the RPM goes up to 7000 like the original does,

Hi M, the motor I need would have to go forward, stop then reverse, sorry I should have made this clearer,

Peter
 

Minder

Apr 24, 2015
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If you have a S.M. motor there you need to state the motor technology, Perm. Magnet field or series wound field.
M.
 

Bluejets

Oct 5, 2014
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Try this......... top is original.....below that is alteration to wiring.....to the left of that is adaption of reversing switch. Advise getting qualified electrician to make changes.
motorReverse.jpg
 

duke37

Jan 9, 2011
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The sewing machine motors I have seen are mains AC motors and I would not advise a novice to play with them for safety reasons.

A DC motor with permanent magnet field can be reversed without getting into the motor just by swapping the wires over. I have used motors from car radiator cooling fans with a 12V supply. Controlling the voltage to the motor will control its speed.
 
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