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CNC Bridgeport retrofit

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  • CNC Bridgeport retrofit

    Figured I would post up some pictures of my retrofit project. Not going to post up huge amounts of detailed commentary, happy to answer questions however.

    It started a couple months ago when I found it for sale somewhat locally, couple hours away.

    Been wanting a cnc mill for a long time and this thing is exactly what I wanted.

    Pic at its last home



    Brought it too my work, took enough of the head apart to get it under my garage door. Grabbed a skid from my local machine tool dealer, added eye bolts and strapped it down.



    I wussed out and hired riggers to move it





    my neighbours think i am crazy
    Last edited by legendboy; 02-20-2012, 03:49 PM.
    https://www.flickr.com/photos/csprecision

  • #2




    https://www.flickr.com/photos/csprecision

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    • #3
      Started doing lots of reading on different controls and drives.

      Ended up deciding on Granite VSD-XE drives and USBCNC from edingcnc.com

      It took me a while to get the drives bench tuned properly but I had some help and finally got it figured out.





      Last edited by legendboy; 02-20-2012, 03:52 PM.
      https://www.flickr.com/photos/csprecision

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      • #4






        https://www.flickr.com/photos/csprecision

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        • #5


          Enough work for one night

          I was not looking forward to cleaning it. Couple saturdays ago my wife had to work so I called grandma to come watch the kiddies so I could have the day to dig in.

          7 hours, 10 cans of brake cleaner and 5 pounds of rags later



          https://www.flickr.com/photos/csprecision

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          • #6
            I took the old cabinet that housed the drives and had it sandblasted. Had buddy at my work spray it with baked enamel finish.

            Making some modifications







            I was really hoping to get more done this weekend. I bought a bag of pc case standoff's and screws but as it turns out the screws are too big for the mounting holes on the drives. Hopefully I can find some smaller ones locally tomorrow.
            https://www.flickr.com/photos/csprecision

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            • #7
              Snagged this ACS350 on ebay a couple years ago for $100 buy it now.

              Finally have a use for it



              I had another ABB drive that I used on my lathe. They seem like good units
              Last edited by legendboy; 02-20-2012, 03:54 PM.
              https://www.flickr.com/photos/csprecision

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              • #8
                Here is a screen shot of my first design of the control interface. I am going send the final flat patterns out and have them laser cut.

                I bought a 15" panel mount ELO touch screen on ebay. Came out of a photo booth kiosk.

                Also grabbed a really nice panel mount Indukey KS7236 membrane keyboard on ebay for $50. (retail is 550 Sterling!)

                Also purchased Intel D525MW atom, Intel solid state HD

                I think i want to have the keyboard angled slightly up so this will likely change.

                https://www.flickr.com/photos/csprecision

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                • #9
                  any tricks to getting the wires in the 3rd pic up to bend to my will. they are also a bit short for what i had planned

                  they have zero memory

                  i could strip the outer insulation off as soon as the cables enter the enclosure but the drive manual says bring insulated cable right to the drive.

                  the wire type is 5 twisted pairs each with their own foil shield and drain wire in moulded cover/insulation

                  i am not sure if i will run into all sorts of emi issues if i do that, anybody have any insight on tha



                  oh yea i am going to be posting tons of questions here so please help me out
                  Last edited by legendboy; 02-20-2012, 11:56 PM.
                  https://www.flickr.com/photos/csprecision

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                  • #10
                    Have the wires lost their flexibility? You could heat them up with a heat gun. Just don't go crazy. Or replace the cable back from the encoders.

                    As long as you don't have the encoder wires next to power wires, especially the motor ones, you should be fine.

                    A friend is probably going to buy the granite drives to replace the geckos on his router. Hopefully they work better. Also looking at using one of the kflop controllers.

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                    • #11
                      Originally posted by macona
                      Have the wires lost their flexibility? You could heat them up with a heat gun. Just don't go crazy. Or replace the cable back from the encoders.

                      As long as you don't have the encoder wires next to power wires, especially the motor ones, you should be fine.

                      A friend is probably going to buy the granite drives to replace the geckos on his router. Hopefully they work better. Also looking at using one of the kflop controllers.
                      I will try the heatgun once I get them ready for their final path. I would like to use all the existing cable if i can. Is it ok I to add length to individual wires if needed? they would be soldered and shrink wraped
                      https://www.flickr.com/photos/csprecision

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                      • #12
                        Solder and shrink wrapped. Keep them twisted and paired all the way up to the driver if possible.

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                        • #13
                          Originally posted by legendboy
                          any tricks to getting the wires in the 3rd pic up to bend to my will. they are also a bit short for what i had planned

                          they have zero memory

                          i could strip the outer insulation off as soon as the cables enter the enclosure but the drive manual says bring insulated cable right to the drive.

                          the wire type is 5 twisted pairs each with their own foil shield and drain wire in moulded cover/insulation

                          i am not sure if i will run into all sorts of emi issues if i do that, anybody have any insight on tha



                          oh yea i am going to be posting tons of questions here so please help me out
                          I also used the original bridgeport cables. Even though your manual says to bring the insulated cable right to the drive, the outer jacket is electrically non functional, I stripped it and bundled with tie wraps. As for the motor power cable, you can strip the insulation but need to maintain the shield.

                          I have the exact same VFD as you bought. It has worked fantastic, one of the nicer vfd's I have seen. I put external braking resistors into use.

                          Good luck, looks like your coming along nicely.

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                          • #14
                            What I may do is bring the original bridgeport cable just inside wire ducting, tie it down and then switch to new 2 conductor shielded for each pair to run where I need it to go.

                            My local electronics place has shielded shrink tubing i could use to cover the exposed transition area for extra isolation. Sounds like this may be over kill tho.

                            Have my first evening class at SAIT "intro to cnc controllers" tonight, pretty excited.
                            https://www.flickr.com/photos/csprecision

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                            • #15
                              One thing you should add to the control panel is a MPG. It is so, so, so much better for jogging and touching off than the keyboard.

                              http://www.cnc4pc.com/Store/osc/prod...roducts_id=163

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