RE: [CAD_CAM_EDM_DRO] ANYBODY know somebody???

Hi Dave and All:
       
     Thanks for your reply. Yes, I have a local electrician who did check

the incoming power for voltage and also the phase order.  He also

checked the wiring to the machine control transformer and varified

the phase by checking the rotation of the coolant pump.  The Electrical

Schematic Diagram for the machine Shows the terminal strip above

the Randtronics 10HP DC Spindle Motor supply and it checked out OK to

the print.  This print does not show any information on the board.  I

have studied the motor control board and found the jumper wire which

is just a solid wire coming out of the board and goes back into the board

and is soldered on the back of the board.  They are located in the lower

left corner when you are facing the unit.  The power supply has two

wires that go to the motor field and two wires to the motor armature.

I will get a picture today if possible.  THANKS FOR ALL YOUR HELP!!!

The machine is ready to try out I just need to set these jumpers.

                                           GOD'S BLESSINGS
                                                               Bill Thomas

On Sun, 27 Feb 2011 23:58:21 -0800, Dave Halliday wrote

>  
>
> 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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