These are pictures of my Bridgeport CNC Conversion.

The mill is a 1963 J-Head Step Pulley Mill that was a Government
Surplus mill. The CNC Conversion consists of the following elements:

1200 oz/in Stepper Motors (X and Y)
G201 Gecko Stepper Drives (X and Y)
PMDX-135 Power Prep Module
PMDX-131 Breakout Motherboard
60V Toridal Transformer
HP eVectra Computer
Hitachi VFD

I was very fortunate that my mill had a NEMA Enclosure attached
to it that used to house all of the large contactors. I gutted 
this box and installed all of my components. The VFD is actually
fastened to the back of the NEMA enclosure.

Image 1 shows the Mill Milling a new Drive Tube to replace the
hand milled tubes.

Image 2 shows the inside of the NEMA enclosure housing the CNC
control.

Image 3 is the new drive tube ready to install.

Image 4 is the drive tube after it was removed from the mill.


Mike Hoffman
     of
Hoffman Mechatronics

mike_hoffman at verizon.net