CAD CAM EDM DRO - Yahoo Group Archive

Power supply wire lengths

Posted by andygeppert
on 2001-12-17 11:17:39 UTC
This is my first post on this newsgroup, and I'd first like to say
thanks to everyone who contributes. I have found a lot of good advice
here.

I am working on a CNC Mill retrofit using an old Well-Index 810. I am
using the original power supply components and motors/encoders. I
will use a PC and Gecko G320s to control the system.

My question has to do with the location of the power supply
components, and the wire lengths between them. Yes, I have read the
Power Supply information Mariss wrote on the GeckoDrive page, but I
still have questions. Maybe this has been covered before, and someone
can point me to the original posts.

I'd like to do the following:

1) Use the existing transformer(240VAC in, 35VAC out), rectifiers,
and capacitor (7800mfd, 150VDC) to get 50VDC. These components would
be located in a cabinet that has other A/C relays and control in it,
on the mill.

2) From the above cabinet, I would run two wires (14g, 6 feet long)
that carry the 50VDC to my control box which houses the servo drives
and other electronics. The 50VDC supply wires would connect to a
33,000mfd, 60VDC capacitor. From there I would split the power three
ways, going through fuses, and finally to the servo drives (with
1000mfd caps on them).

Is this viable? Overkill? Or trouble? I know you're supposed to keep
leads short, but from where? I'd like to keep as much (or all) of the
AC components away from my control box.

Thanks in advance,
Andy

Discussion Thread

andygeppert 2001-12-17 11:17:39 UTC Power supply wire lengths Paul Amaranth 2001-12-17 11:43:12 UTC Boss-8 Programmer's manual wanted Doug Fortune 2001-12-17 12:45:12 UTC Re: [CAD_CAM_EDM_DRO] Power supply wire lengths