Sailrite LSZ-1 motor upgrade?

[IvoryCreek]

up to maybe 4? you think poor speed control has to do with the type of material I sew?

[sandyt]

I have never owned a Sailrite. So I am just guessing, sorry. But from what I have read about them, it's possible you are just asking to much from this little motor. 

Are you using a sharp and correct leather point needle with the correct thread size? This could also help a lot if it's wrong.

Sounds to me the motor is struggling to punch through at low speed (less power).

But again, I never owned a Sailrite.

Sandy.

 

[Wizcrafts]

Again, the Monster II wheel should help get the machine going when you sew leather. Call Matt at Sailrite and talk to him.

[IvoryCreek]

will do that Monday

[ZigZag]

The buzzing sound is Common and is the machine struggling to get through the material. I would say you are finding the limits of the machine with 4 layers of 3oz leather. It's possible there simply isn't enough torque from the motor to punch through that material at slow speeds.

As a test I would suggest trying just 2 layers of something like jean fabric and see how well the slow speed control works. If you are still having trouble, then almost certainly a pedal issue. On fabrics like that men has a nice linear speed control that progressively gets faster with pedal pressure.

[dikman]

Just looked at the specs. for the motor and at 1/10th HP and 1.5 A I would consider it on the puny side for driving needles through leather. Probably not much different to the motor on my domestic Singer, and that buzzes (and stops) if I try to make it do too much.

[Wizcrafts]

4 hours ago, dikman said:

Just looked at the specs. for the motor and at 1/10th HP and 1.5 A I would consider it on the puny side for driving needles through leather. Probably not much different to the motor on my domestic Singer, and that buzzes (and stops) if I try to make it do too much.

The Sailrite portable machine motors feed a small speed reducer pulley that mounts on the right end of the machine, hidden by the flywheel. It looks to be at least 3:1 reduction. But, as you pointed out, the combination is still weak compared to a half horsepower industrial motor, especially if that motor feeds a 2:1 reducer. Torque is multiplied by the same ratio as the speed reduction.

[dikman]

Thanks Wiz, there's no way I could have figured that out from the photos. Quite a neat setup, in that case, but yeah, that motor is still essentially a domestic machine  motor. I guess they had little choice, though, in trying to make it a compact, portable machine.

[Wizcrafts]

I suspect from reading the description on Sailrite's web page for the Monster II wheel that it is bigger around than the Power Plus wheel. Unfortunately, they don't list the diameters of those "balance" wheels (flywheels). The Monster II Wheel weighs 7 pounds. That, coupled with a probable larger circumference, would make for more punching power at startup speeds. Now, it's up to the OP to contact Sailrite about these differences and let us all know the outcome.

[IvoryCreek]

Thank you for the analysis. I've called up Sailrite and they also think what I'm describing may indicate the pedal control is faulty. I'm waiting for their technical specialist to call me back with the troubleshooting instructions. I will update again then.