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Reverse Sewing Machine Motor?

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Neil Wyatt10/01/2019 17:03:15
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16287 forum posts
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I've just had a telephone query about how to reverse a sewing machine motor.

The issue is that the Ricca motor (YM260A-9) originally used by GHT for his pillar tool is no longer available, but plenty of people have had success using sewing machine motors with variable speed foot switches.

The down side is that these require a crossed belt for a neat installation.

The question I was asked is, are these motors easily reversible and if so, how, which would allow the use of a toothed or poly-v belt?

I am sure a source for the original motor would also be of interest.

Neil

<edit> it seems the original motor 'number' is actually for a 1960s Singer sewing machine.

Edited By Neil Wyatt on 10/01/2019 17:04:21

Joseph Noci 110/01/2019 17:17:14
524 forum posts
829 photos

Yes, reverse either the connections to the rotor ( brushes) OR the end connections to the field coil, as per any universal motor.

Joe

Keith Long10/01/2019 17:40:39
789 forum posts
10 photos

Most likely NOT reversible from experience. The motor that I bought in the last 3 years or so has offset brushes so is optimised for single direction operation. Also to get at the connections for the brushes or the coil would have needed some serious surgery to moulded plastic parts. The motors are sold as unidirectional but you can get either clockwise or anti clockwise versions. I sourced my motor from a sewing machine and spares supplier via EBay and bought the uprated (100 watt) version rather than the normal 60/70 watt type.

Howard Lewis11/01/2019 12:42:50
2156 forum posts
2 photos

If anyone wants a sewing machine motor, with speed control pedal, PM me for how to come and collect from East Anglia.

Howard

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