motor reverse

[Peter Whitehead]

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]

You want to match the speed (RPM) and torque of the original motor.

Bob

 

[Minder]

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]

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]

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

 

[Bluejets]

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.

 

[duke37]

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.