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[souperdoo]

I think so. I have found that set-up to have plenty of piercing power. I don't know exactly what you intend to do, but I'm hard-pressed to imagine a scenario where it wouldn't be enough. Certainly, for upholstery it is. If you are a leather crafter it might be a different story - If you're making holsters out of veg-tanned leather and are going through a 10mm stack of leather with 207 thread, well, that's a whole different kettle of fish. But then, you'd be over on leatherworker.net...

If you are looking to slow things down it ought to be a good solution. 150 SPM is really pretty slow and, with the servo and controller, doing one stitch at a time can be done with absolutely no talent whatsoever (ask me how I know and appreciate this).

I will ask what the diameter of the pulley is that you currently have on the PFAFF. It may not need to be hanged out and would give you something slower than a minimum of 150SPM.

[CnC]

Won't be doing any leatherwork at all. A couple of auto interiors eventually as well as our boat's canvas (once again, eventually!). All this hinges on how long it takes me to become proficient enough to do all this properly. It would be insulting to those of you who are actually skilled at this stuff to say that I'm going to simply throw this stuff together. But hey, that's why I'm here.

[CnC]

Sorry Superdoo, never answered your question. The new servo motor pulley is 75mm. Can you see any issues "torque-wise" if I change that out to a 45mm? Also, I need the 1/4" and 3/16" welting feet for this thing. Any suggestions?

[souperdoo]

Going to a 45mm pully will slow the machine down by 40% and increase torque, so I don't see a problem if you don't have a needle positioner.

Cutex sells the PFAFF feet for about $20 the pair. They are probably made in the same factory in China as the ones sold on e-bay for $15, but Cutex is a brick-and-mortar in New York and, if you don't like the product, you can send it back for replacement or refund. Feet are feet. If a $20 foot set works, then a $40 foot set won't work better just because it says PFAFF on it. If you really want genuine PFAFF feet, I believe that sewingpartsonline sells them.

[sandmanred]

For a quick fix I have found that oiling the cork of the clutch plate improve speed control a lot on a clutch motor. Almost to the point where I like it as good as my servo drives. My servo drives do have a minimum speed of about 200 rpm and it's just on/off, no feathering from 0-200 rpm at the motor. I use just plain old sewing machine oil padded on to the clutch cork, let it soak for a few minutes and wipe off excess and reassemble. But only do the clutch side of the cork, not the brake side!

[CnC]

Ok so what the heck is that half arc looking cork thing that came with my servo? No instructions so I put it under the cover to stabilize it? It obviously has another purpose?? Couldd someone send me a pic of how/where to install it correctly? Also, should I get welting feet with or without teeth?

[John G]

@CnC I’ve added a 750w servo motor to my Singer. And it is certainly more controllable. I’m happy that I’m driving the machine rather than the machine is driving me. It have it on the slowest setting which I find ok. I think with practise I would have got the control of the clutch motor but for $150 a servo seemed a no brainier. An hour to fit. Very simple upgrade.

[CnC]

Good to hear John. Did your motor come with a small arc'd piece of cork that looks similar to a curved brake puck and if so, how did you mount it?

[John G]

@cnc No. simply bolted to the underside of the table. Motor has the actuator unit fitted to it. Separate control module. I will take some photos tomorrow and post them.

[CnC]

The little half arc is the part I'm referring to? Not sure where it goes?? One other question too regarding the 45mm smaller motor pulley. From what I've been researching the pulleys offered online seem to be for the clutch motors. Is there a specific place that sells them for the servos?

[Adam12]

The cork arc is an extra brake pad, just store it. Give it a shot with the pulley it has, i bet you find its not necessary. And you can always add it later. Get a pic of the pulley and shaft, some of them are threaded with a jam nut, others are on a keyed shaft. The key shaft pulleys i get come from the local hardware store. Also keep in mind that you may need to change belt length to compensate for the smaller pulley if you swap it.

[CnC]

Thanks Adam!