RE: [CAD_CAM_EDM_DRO] ANYBODY know somebody???

Hi William

You should be able to find someone locally with a multi-meter to trace out
the inputs to the transformer and figure out the jumpers.

Generally, there are two isolated 110 volt input (primary) windings on your
power transformer. You connect them in parallel for 110 operation and move
the jumpers to connect them in series for 220.

Is this just a control circuit board or do these jumpers feed power to the
motors. Are they large or small?

If this is just the power to a control board, you could also use a
220-to-110 step-down transformer.

If you could take a close-up photo of the jumper section of the board, we
would have a lot more information.

Dave

> -----Original Message-----
> From: CAD_CAM_EDM_DRO@yahoogroups.com
> [mailto:CAD_CAM_EDM_DRO@yahoogroups.com] On Behalf Of William Thomas
> Sent: Sunday, February 27, 2011 11:45 PM
> To: CAD_CAM_EDM_DRO@yahoogroups.com
> Subject: Re: [CAD_CAM_EDM_DRO] ANYBODY know somebody???
>
> Hi all:
>     Does anybody know somebody still living that would still
> have records of past machine controls from 1975?
>  
> I have looked on Google and contacted some but can't find
> anyone local in Michigan to check this board out.  I am trying
>
> not to ship the 35 year old circuit board 2/3 the length of
> the USA twice just to find out how to trim the two jumper wires
>
> on the board to set it for 220 volt 3 phase.  I have located
> the original importer and talked to a service man who saw the
>
> last two or three of the Model 100 NC Cadillac lathes when he
> first started to work at the company but he started his
>
> work on the model 1000 which is a CNC with all the controls
> (both the machine and spindle motor) build by Fanuc.
>
> Does anyone have any experience (good or Bad) with the
> following companies that say they do work on Randtronics?
>
> I have not contacted these companies yet.
>
>                                Phoenix Systems - Greensboro, NC
>        
>                                Industrial Electronic Repair -
> Rural Hall, NC
>
>                                Any other Companies you have
> experience with?
>
>                                CADILLAC NC-100 LATHE
>               
>                    With General Numeric System 5T-2 Microprocessor
>
>        Made in Taiwan by Yam    Model #2233      Mfg # 867354
>
>        Motor Control by Randtronics Inc 1975  Assy
> #3432-240-512  SN - 665EA
>
>         
>                          WARNING NOTE ON TAPE READER
>
>                       Jumper R17 & R22 on motor drive
>
>                       See Dwg #3432   MUST CHANGE FOR 220V ! ! !
>
>                                                               
>          GOD'S BLESSINGS
>                                                               
>                  Bill Thomas
>          
>
>
>
> [Non-text portions of this message have been removed]
>
>
>
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