hello all, I've recently moved and now finally have convenient access to a
220V outlet. I have a Sanyo Denki BL Super servo power supply and amps and
motors from the machine I bought nearly a year ago now, and i really want to
get around to getting them all running. I'm wondering how safe on the power
unit it is to run it off of 2 phase, for both testing and on the machine
running. where the machine is, there is 2 phase service and i have a
home-built rotary phase converter with a 7.5 hp motor. This was built to
run the lathe on, which also has a 7.5 hp motor in it (non CNC)
For testing, i want to go buy a cord that'll plug into the outlet in the
garage and run the power supply and vfd off of it for testing.
Would you guys think it'd be safe to try it with only 2 phases? Or should I
reverse engineer the initial stages of the power supply to determine how it
handles the input. I'm figuring it probably just rectifies the 3 phases to
a single DC supply, but im not sure. to my knowledge it's output is 180V,
and the 3 axes are 1.2,1.2, and 2.8KW power ratings, per the mills manual.
for testing, I'll only be playing with 1, maybe 2 amps on it at a time and
no load on the motor shaft except maybe a laser pointer taped onto it. If I
had to, it seems I could put in bigger rectifiers and all to step up the 2
phases of the input, if thats what it does with it.
The VFD is a mitsubishi freqrol, i think the spindle is 7.5 hp as well, and
im not sure how often i'd ever hit anywhere near this much power. If anyone
knows where to find documentation for the sanyo denki or mitsubishi stuff,
I'd love to know. I havnt managed to find anything on the net, and the
print stuff i have that looks to be a datasheet for the servo amps is in
japanese.
thanks for all suggestions and advice
Jim Coleman
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