RE: [CAD_CAM_EDM_DRO] gecko and power sources

Sounds like a lot of power on a Sherline. Are you planning to use these
motors as a spindle motor or actually drive the axis's? I am using 62 vdc
with some big NEMA 42 sized motors on Bridgett (a 5000+ lbs Bridgeport
series II) and I would seriously doubt if I am drawing much over 5 amps on
an ongoing basis. It would take a lot of Sherline machines to equal the
weight that is getting moved. I run my Shoptask on G320 drives with a 24 vdc
power supply and again, the table weighs more than a Sherline.



Tim
[Denver, CO]

> -----Original Message-----
>
> I have just recieved 2 servo motors off e-bay, and the prelim tests
> suggest that 10 amps of current at 50-90 volts should be about right.
> My problem is that I seem to be having difficulty finding a power
> supply that can deliver. I would like to use g340 amps but cant seem
> to find a transformer that can deliver that sort of performance
> easily. There are 2 designs I am running around in my head ( the
> system is a cnc sherline with emc/parallel interface ) System 1 is
> a ~ 60 volt transformer, which can deliver 10 amps, running through
> a rectifier with a big capacitor to yeild ~90 vdc, The second idea is
> a 60 volt but cheap, 2 amp, transformer which charges a nimh/lead-
> acid battery which supplys the current for short times of more than 2
> amp draw.
> So the question is : does anyone know of a cheap source for 10 amp
> 60volt secondary transformers, or does the battery/low current
> transformer sound viable?
>
>
> Thanks in advance for any help
> Bill H
>
> P.S. I haven't bought the drives yet so if anyone has another
> idea i'm all ears but the gecko drives sounded the most economical
>
>
> Addresses:
> FAQ: http://www.ktmarketing.com/faq.html
> FILES: http://groups.yahoo.com/group/CAD_CAM_EDM_DRO/files/