I only use it for cutting pcb, very rarely for fiber glass, 1 minute into operation, almighty squeal and a minute whiff of slight smoke, blade still spinning then – dead as a dodo.
Soooo, I opened it up, took the motor out and stripped it down. I thought these things suppose to have oil or grease in – nuffing at all like that, dry as a bone. Armature looks OK so did the field coils no smell of varnish as I was expecting.
One of the tiny chokes in series with the brushes was open circuit, I was about to un solder it and one leg fell off so I removed the heat shrink sleaving to find the coil intact a load of soot in the area just above a RFI capacitor that had one leg missing.
I only bought it early January last year so the warranty has just about expired, so I made my feelings known at Proxon, and doubt it's worth paying some £72.50 for a new motor… and the flimsy 'Splitter Wedge' as Proxon calls it that always seem to jam no matter what blade is being used.
I reckon some arching at been going on to create the soot, but what do you reckon on seeing no lubricant…. not even in the bearings? No over current or temperature sensor at all, 85Watt motor straight on to mains AC via a 1 pole switch.
Dave
Edited By Sparks on 13/08/2020 23:18:38