Torque - How Much Do You Need For A Heavy Stitcher?

[amuckart]

I've been looking at various options for motors, and one of the things I'm curious about is just how much torque you need to drive a heavy stitcher like a 441 clone or an Adler 205.

Does anyone have torque/rpm graphs for the various servos people are selling, or even ballpark figures? Am I looking in the 1.5Nm range or in the 10-20Nm range?

Thanks.

[jimsaddler]

Hi Al

Simple answer is: it depends on the reducer? I drtve the 441s and the 205 with as little as 400 watts easily with a 6" reducer and 1 1/2" Pulley on the Servo Motor. I might add that the large 12" Flywheel on the Cowboys make this very easy to do. Others have a Smaller Fly Wheel so seem to need more Grunt to penetrate Heavier Leathers. Lately I have been using the 550 Watt Servo adjustable Speed Motors at very low speeds (500 revs) with the 6" reducers and the results have been very good. As slow as 1 Stitch in 3 seconds, pushing through 3/4" of Harness Leather without effort and that is slow Power and accuracy.

Motors have gone ahead in leaps and bounds in the last few years. So it is hard to keep up with the new trends, but I keep trying and get pleasant surprises always. Actually by mounting the Motor in front near your Knee it is easy to switch the speed up or down while stitching. So it is nearly as good as my old Singer Back pedal Treadle Stand to use for control of stitching.

Please have a Good Day.

Kindest Regards.

Jim Saddler.

I've been looking at various options for motors, and one of the things I'm curious about is just how much torque you need to drive a heavy stitcher like a 441 clone or an Adler 205.

Does anyone have torque/rpm graphs for the various servos people are selling, or even ballpark figures? Am I looking in the 1.5Nm range or in the 10-20Nm range?

Thanks.

[Techsew Ron]

Torque usually depends on the motor, flywheel and reducer being used.

Our SmartServo motor is 600W, 4/5HP with a 2" pulley on it and the size of the flywheel on the Techsew 5100 is 12".

[Cobra Steve]

Torque usually depends on the motor, flywheel and reducer being used.

Our SmartServo motor is 600W, 4/5HP with a 2" pulley on it and the size of the flywheel on the Techsew 5100 is 12".

Hi amuckart. I use the same as Ronnie uses, and we have had no problems. I also agree with Jim regarding the motors, they are much better today then they were 3 years ago, with that said,just about any speed reducer or hand wheel will work on the 600W servo motors. Thanks, Steve

Edited June 29, 2011 by Cobra Steve