Alpha-Dave
Established Member
Hi all,
Old machinery apears to be an emotional rollercoaster:
I picked up a Wolf bench grinder for £30 from Facebook, it turned out to be the 8” version rather than 6”, which was good.
The seller plugged it in (having put on a temporary plug) and it ran ok. It ate some metal so all was good, I assumed, although the switch was a little gritty.
Getting it home and starting to clean it up, I removed the base to check the wiring to see how to add a new lead. It was quite crusty and corroded inside, and removing the large starting capacitor flexed some wires that have not been moved since 1950 (according to the date on the cap)!
Now looking at the insulation, it is crumbling away on the wires from the motor. Two of the 4 wires go to the switch, and 2 go to the capacitor.
Using a continuity tester: the capacitor is continuous across its terminals, which seems bad. All 4 of the motor wires are connected to each other. None connect to the case (fortunately). Therefore I’m wondering if the insulation has completely broken down between the switch & cap and the motor, or is it possible it is wired ok?
Any thoughts welcome!
Many thanks!
Old machinery apears to be an emotional rollercoaster:
I picked up a Wolf bench grinder for £30 from Facebook, it turned out to be the 8” version rather than 6”, which was good.
The seller plugged it in (having put on a temporary plug) and it ran ok. It ate some metal so all was good, I assumed, although the switch was a little gritty.
Getting it home and starting to clean it up, I removed the base to check the wiring to see how to add a new lead. It was quite crusty and corroded inside, and removing the large starting capacitor flexed some wires that have not been moved since 1950 (according to the date on the cap)!
Now looking at the insulation, it is crumbling away on the wires from the motor. Two of the 4 wires go to the switch, and 2 go to the capacitor.
Using a continuity tester: the capacitor is continuous across its terminals, which seems bad. All 4 of the motor wires are connected to each other. None connect to the case (fortunately). Therefore I’m wondering if the insulation has completely broken down between the switch & cap and the motor, or is it possible it is wired ok?
Any thoughts welcome!
Many thanks!