Recent content by Rob45327

Thanks Jim. I'm going to give it a week and if I don't find a dead motor, I'll rewire this one. The white lead has bare conductor very close to stacked steel plates of the field core. Anything I do in this area isn't going to be pretty. One thing I might be able to is remove the cracked...

Thanks Jim, I think it might be magnet wire or something like that. If I ever find a dead motor I'll find out. If I can't find one soon I'll have to make this one work as is. I have the manuals to the machine assuming you have 15-91. It could be 201 also. They both used the same motor. When...

Hi Jim, This is stuff I put on the gears. There seems no solids in this grease. Some greases have clay or lithium and it just cakes up over time. For the wicks you can use petroleum jelly. The Featherweight Shop also has a grease they sell which I bought. It was pricey though I think I might...

Hey guys. Yup that's the area I'm worried about. Never saw one this bad. If I can't find a coil to reverse engineer, I'll have to do something like what you're suggesting. The black stuff on the spring is actually carbon and grease. It gets everywhere. I cleaned the motor body but not the...

Hi Jim, To remove the screws under the hand wheel you just need a good fitting screwdriver to start with. With the sewing machine in it's normal orientation, align the screwdriver with the screw and give it a moderate whack with a hammer. It sounds stupid but I've done this 3 times and have...

Here are picks of the motor finally. The motor is a direct drive with no belt. There is a worm gear inside the motor when assembled. It drives a helical gear on the hand wheel. There are two windings in the field core. One connects to line and the other connects to neutral. Each winding also...

Thanks Jim. I will post a picture later today. My phone is dead and I have go to an interview.

I disassembled the motor and cleaned it The brushes are half used up. The commutator was black with carbon which I removed using lapping film. I didn't think to check for roundness. I'll do that next with calipers. I don't have a way to check for offset relative to the bearings. The motor brush...

What does the field core do? I'm a mechanical guy and only vaguely understand motors.

I was thinking 18 gauge! I'm sorry I didn't mention that varying mechanical resistance is normal because it's a sewing machine. Normally these motors are such good shape I don't have to do anything but put on a new power cord. This motor is more beat up due hard use and bad servicing.

The site that sells the wire says the the wires were for 5 to 12 volts and didn't mention current. The brush leads are fabric covered and I'm trying to redo the motor with vintage type stuff. Although I'm going use copper leads instead of steel for ease of soldering. All I know is it's a 1 amp...

Summary: I'm rewiring an antique 1 amp universal motor (AC or DC). The two field coils need new brush leads so I have to buy new wire for them and I don't know the voltage. If the motor is running on 110 Volts is it 110 volts at the brushes? The motor is speed is variable and mechanical...