I have a treadmill that lost 80% of its power. When i put any load on it (walk on belt), it starts arcing quite a bit and makes noise in proportion with the speed. The motor runs seemingly fine without load at all speeds. At lowest speed I can stall the motor with just a single finger on the belt. But if I rev up the motor to say 50% of its max speed (running speed), I can then do walking pace as the motor labors.
I took the motor apart and did not find anything apparent. The commutator is a little dark, but i can still tell its copper.The segment partitions are black, very narrow. 0.6mm maybe. Brushes are large, 1.5cm in length still, a little charred on one edge. Winding seems ok, but a little dark in some area. I can't tell if that is from lacquer or what. It never smelled burnt. Reed looks ok too. The motor has permanent magnet, spec sticker states 17.5 A, 145 VDC, 5700 rpm, external fan.
Both walking and drive belt tension is just above slipping at this point. I wanted to make sure it wasn't tensioning.
I took the board out, just to give it a visual inspection. I didn't see any resistor charred.
I could use some suggestions. How do I isolate the problem.
I took the motor apart and did not find anything apparent. The commutator is a little dark, but i can still tell its copper.The segment partitions are black, very narrow. 0.6mm maybe. Brushes are large, 1.5cm in length still, a little charred on one edge. Winding seems ok, but a little dark in some area. I can't tell if that is from lacquer or what. It never smelled burnt. Reed looks ok too. The motor has permanent magnet, spec sticker states 17.5 A, 145 VDC, 5700 rpm, external fan.
Both walking and drive belt tension is just above slipping at this point. I wanted to make sure it wasn't tensioning.
I took the board out, just to give it a visual inspection. I didn't see any resistor charred.
I could use some suggestions. How do I isolate the problem.