My Very First (Almost) Homemade Sewing Machine

[catskin]

Isn't calling this DIRECT drive false, it is BELT driven. Direct drive would be with the motor coupled directly to the machine shaft.

[Trox]

Hi Lucas, Takk for sist.

I did not see your topic before now. I happy to see your project was a success, very nice built. And that a 90 W motor is proven enough is a bit of surprise, but I see the gear ratio. The time you where visiting I had no sewing machine set up with a converter, but I have had many before. I have used them mainly on 3 phase clutch motors because the lack of such power in my workshop. Even on 3 Ph old Efka variostop`s ( position clutch motor with electronic brake and clutch) They always have worked out great. I haven't had any use for the pedal (pot meter) on any of them, I only limited the top speed on the converter and used the clutch. I could alway go as slow as I wanted on the regular clutch motors, a stitch an hour if I wanted to. On the Efka variostop`s they only worked as converters because the motor control box regulate 6 to 12 pre set speed on the pedal and will compensate for any speed limitations set on the frequency converter (in the lower speed end that is). I recognize the humming you talk about, thats just the wrong frequency (speed) on the motor. Then I just set the hertz a bit different, some hertz up or down and it disappeared. I understand that can be difficult on zero, but then I guess the problem must be the pedal. Perhaps an adjustment or changing it will get rid of it. I am glad the Global worked out well to, it looks like a very nice machine. Overall a job very well done.

Tor

[Gregg From Keystone Sewing]

That's one heck of a setup, glad that you are happy with that. Just so that folks here know and to add to the conversation, Efka for example has on thier DC1250 and DC1550 motor control boxes an input for a external potentiometer for speed limitation, among other things, that would operate in the same way Bikemanic has it here. Not that Bikemaniac would have it any other way, but just to put that out there, and again, thanks for sharing.

Edited February 26, 2015 by Gregg From Keystone Sewing

[Trox]

Thats right Gregg, and I have moved up to using the Efka DC 1550 on my 441 machine. Very happy with it, more than enough power and a time saving setup. Expensive, but no need for a speed reducer and life time support.

I also use the older DC 1600 on a smaller machine (a DA 267), a very good motor too but not for sale anymore. You will understand why these motors cost more when you use them and get free support by Efka on Skype (if needed).

[Gregg From Keystone Sewing]

Thats right Gregg, and I have moved up to using the Efka DC 1550 on my 441 machine. Very happy with it, more than enough power and a time saving setup. Expensive, but no need for a speed reducer and life time support.

I also use the older DC 1600 on a smaller machine (a DA 267), a very good motor too but not for sale anymore. You will understand why these motors cost more when you use them and get free support by Efka on Skype (if needed).

That's the case, Efka support is pretty awesome for sure. I don't know about prices, but I would think the Efka DC1250 with control box in the $700USD range is not a bad option for most here. Not everyone, as you know, has your level of technical knowledge to put something like this together. Thanks again.