Hi all,
Just pulled out an old hoover motor, 240V 1000W XH-100, complete with original smoothing capacitor, switch etc.
Plugged it into the mains and started it up to check it still worked. Started arcing across the brushes pretty quickly.
I disassembled it, cleaned up the commutator and abraded it gently with emery cloth, brushes were in good nick (thing looked hardly used) but slightly chipped and a few small grooves in the contact surface, which was worn to match the commutator. Decided it may be a good idea to try and clean them up so wrapped emery cloth around the commutator and gently rotated against the brushes. Then rounded off the corners to help prevent chipping.
Reassembled the thing, fired it up and it jolted into life. Nice, clean high-pitched sound, minor radial orange sparking from commutator (figures it was wearing in) and so let it run under observation. Sparking increased and about a minute in the arcing returned. Pitch dropped indicating a change in angular velocity (?) and when powered down motor shaft, face plate and especially brushes were warm to the touch.
Rotating by hand gives smooth motion.
There seems to be minor discolouration on one of the stationary coils but looks surface and possibly just blackening from the sparks?
Unsure where to go from here, I’d really appreciate any advice. Thank you!
Just pulled out an old hoover motor, 240V 1000W XH-100, complete with original smoothing capacitor, switch etc.
Plugged it into the mains and started it up to check it still worked. Started arcing across the brushes pretty quickly.
I disassembled it, cleaned up the commutator and abraded it gently with emery cloth, brushes were in good nick (thing looked hardly used) but slightly chipped and a few small grooves in the contact surface, which was worn to match the commutator. Decided it may be a good idea to try and clean them up so wrapped emery cloth around the commutator and gently rotated against the brushes. Then rounded off the corners to help prevent chipping.
Reassembled the thing, fired it up and it jolted into life. Nice, clean high-pitched sound, minor radial orange sparking from commutator (figures it was wearing in) and so let it run under observation. Sparking increased and about a minute in the arcing returned. Pitch dropped indicating a change in angular velocity (?) and when powered down motor shaft, face plate and especially brushes were warm to the touch.
Rotating by hand gives smooth motion.
There seems to be minor discolouration on one of the stationary coils but looks surface and possibly just blackening from the sparks?
Unsure where to go from here, I’d really appreciate any advice. Thank you!