My "new" Singer 211G166

[dikman]

I think I've finally got this thing to where it should do what I want (the phrase "famous last words" sprang to mind when typing this!), courtesy of my speed reducer. The servo motor has a 45mm (1 3/4") pulley, going to a 120 mm (4 3/4") pulley which drives another 45 mm which goes to the handwheel (about 3" I think). This lot, coupled with the servo, lets me run about 1 stitch per second and can drive through 1/4" hard veg with no effort at all. I'm pretty sure it will do 3/8" (if I want to) but the limiting factor is probably going to be the height of the presser foot.

No matter, it should be more than adequate for my needs.

[Skylark53]

I just received my servo motor last Friday (Consew Premier 550w)... I haven't installed it yet as I'm still restoring the table top (new Arborite) but the reason I got it was because I had read on here that they can be run very slowly and still retain power (torque?)...

Do you think mine will need a reduction setup?

Thanks Dikman

Skylark53

[dikman]

Skylark, it's hard to say. Servos certainly let you run slow and with much better control than a clutch motor just as they are. Mine was actually quite usable without fitting the reducer, but I decided that I wanted it as slow as possible to suit my needs (and abilities). You will have to try it first and see how it feels. Fitting the smallest pulley possible on the motor helps a lot, and I believe the best way to reduce it further is to replace the handwheel with a larger pulley. Worked well on the Pfaff, but unfortunately it would be a major job to fit one to the Singer.

Pulley reducers are pretty expensive to buy, and if I hadn't been able to make one I would have just used the servo as it is. (All I had to buy were the two pulleys - cheap on ebay - the rest is from my accumulated scrap stuff).

Edited November 3, 2015 by dikman