On 2013-09-25, azotic wrote:


"Ignoramus20545" wrote in message
...
As part of a scrap deal, I purchased a nonworking Anca Fastgrind CNC
tool and cutter grinder, a coolant tank with numerous pumps and
motorized screen, and a Boyar Schultz 612 Deluxe surface grinder with
a dust collector and an electromagnetic chuck. The total cost was
$150 for everything, I had to remove.

Anyway, supposedly, the only thing wrong with the Boyar-Schultz
grinder is that "the EM chuck does not work". I tried to diagnose it a
bit today. I found out that the chuck itself works, if I apply DC
current to it from a power supply, it becomes magnetic. So, my
thinking goes, the power supply is bad. If so, what alternatives do I
have? Would any 90v DC power supply work, if it can provide enough
current? Is there anything special about the magnet's power supply?

i

Nothing special. Does the switch to the chuck also have a de-magnatize
position? If it does that position provides AC to the chuck to de-magnatize
the part being held. Just keep track of the wiring and you should be ok.

Best Regards
Tom.

OK, that's good to know, I will check it out.

Thanks

i