Reverse Sewing Machine Motor?

[Michael GilliganParticipant @michaelgilligan61133]

Posted by Michael Gilligan on 05/12/2020 10:55:40:

Posted by ega on 05/12/2020 09:46:59:

[…]

Can you point to a description of the GHT version? […]

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I may be able to confirm/refute that later today [need to locate the book] … but it’s worth mentioning that the part number (YM260A-9) is very widely used in Sewing Machines [so Ricca might be something of a Red Herring]

MichaelG.

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As I seemed to recall … GHT used a Parvalux motor, and the cover of the book clearly illustrates the belt run.

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QED

MichaelG.

[egaParticipant @ega]

Michael Gilligan:

It's good to see the great man at work.

I suppose Parvalux motors may well have been used on some sewing machines but my impression is that it is the small domestic sewing machine motors that the OP asked about.

PS The Parvalux I have on my Quorn is readily reversible.

Edited By ega on 05/12/2020 17:26:19

[Roderick JenkinsParticipant @roderickjenkins93242]

Perhaps this photo and text from the book is more relevant:

Rod

[Michael GilliganParticipant @michaelgilligan61133]

Posted by ega on 05/12/2020 17:25:07:

[…]

I suppose Parvalux motors may well have been used on some sewing machines but my impression is that it is the small domestic sewing machine motors that the OP asked about.

[…]

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Be that as it may … I don’t recall there being ANY reference to the use of Sewing Machine motors in the book.

I will check on that forthwith !!

The OP being our esteemed Editor, who was trying to assist with a telephone enquiry … I suspect he was acting upon information [good or bad] received.

MichaelG.

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Edit: I have just read Rod’s post … That saves me the bother of checking.

Another Edit: Presumably Rod and I have different editions of the book, as in mine the friend’s motor details are referenced at Appendix A 33 … with the referencing text being on p128 and sans illustration.

Sewing machine motor and controller: Make, Y. K. D. Model No. YM 260A-9. 240v. 90 watts. .45 amps. 6000 rpm

 

Edited By Michael Gilligan on 05/12/2020 18:20:01

Edited By Michael Gilligan on 05/12/2020 18:30:16

Edited By Michael Gilligan on 05/12/2020 18:52:58

[Michael GilliganParticipant @michaelgilligan61133]

Rather than making yet another edit:

For info. This appears to be the ‘genuine’ YDK motor [albeit made in Taiwan, not Japan], Advertised by an English supplier. **LINK**

https://www.bsk.co.uk/ydk-sewing-machine-motorfoot-control-2456-p.asp

[quote]

FITS Brother – Elna – Janome – New Home – Singer – Toyota – Riccar etc

[/quote]

MichaelG.

[BufferParticipant @buffer]

Michael It does say in the book about using sewing machine motors.

Ega here you go

[Michael GilliganParticipant @michaelgilligan61133]

Posted by Buffer on 05/12/2020 18:42:07:

Michael It does say in the book about using sewing machine motors.

 

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Yes … I have already recognised that; and the fact that there is more than one edition of the book; and that the motor is still available; etc.

I must emphasise though, that the opening post is wrong, on several counts, when it states: “The issue is that the Ricca motor (YM260A-9) originally used by GHT for his pillar tool is no longer available”

MichaelG.

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Edit: just for completeness: http://www.ydk.jp/motor/global/

Edited By Michael Gilligan on 05/12/2020 19:17:09

[BufferParticipant @buffer]

If you put it underneath you need this one

**LINK**

[egaParticipant @ega]

Buffer:

Thanks for the very clear photos; I think GHT would have approved!

With this approach, direction of rotation seems to depend upon which way up the motor is fixed. Another development would be that suggested by Hopper above.

[duncan webster 1Participant @duncanwebster1]

Series wound motors have very poor speed/torque curves. Shunt wound and permanent magnet are a lot better, induction motors better still. With modern feedback controllers shunt/permanent can be made very good, and variable speed, but you lose power as you slow it down.

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