Do you like this Speed Control?

[Mark842]

I run both types, brushed and brushless. Brushed are inexpensive for the pro and IMO in low torque applications actually have smoother control (could just be a brand thing). The con is if you do a ton of sewing you have to change the brushes. I run a brushless on a Cobra 4 that sees a lot of high torque low sewing and is being run on average 4 hours a day, 6 days a week. All my other machines are smaller for sewing garment thickness leather and I run brushed on them all. Those are all low use, maybe 2-3 hours a week. I 've never really timed the stitch speed on my cobra but I can sew incredibly slow with tons of torque. Most of that machines life is spent sewing 3 and 4 layers of 9-10 latigo.

[Gymnast]

Thank you for your answers kgg and Mark842.

I just like to say, that this low speed torque, that you like the motor to have for heavy leather work, is a matter of the electronics, and not the brushes. A brushed DC motor can provide high torque at low speed, if it have got internal sensors measuring the speed and electronics control the motor current, so same speed is maintained. But it is my impresion, that all the brushed DC motor servo drives sold for sewing machines do not have this kind of electronics build into them.

I saw this supplier selling 4 types of servo motors looking like my Picture above. And the seller argue, that they perform different. Brushed DC motors with no extra Electronics can of cause have smaller differences in torque/speed caracteristics. So if someone using this kind of motors says it have good low speed torque and easy controlled speed, the electronics for it may be inside. https://www.sewingmachinegallery.com/best-sewing-machine-servo-motor/

Edited August 22, 2019 by Gymnast