Announcement

Collapse
No announcement yet.

Denford Orac CNC

Collapse
X
 
  • Filter
  • Time
  • Show
Clear All
new posts

  • Denford Orac CNC

    Hi

    I wonder if you coud advise me on this one.
    I have a 1985 Orac CNC complete with auto tool changer etc. The lathe is still in good working order, however I cannot source any data storage tapes and the old BBC computer is now defunct. I wonder if anyone could point me in the direction of more modern software that will run on a PC and that would not require the use of the data tapes.
    I would not wish to do a full conversion of the electronics at this stage as I don't have the spare funds or time, and it would be a shame to scap stuff that is still working.
    I suppose I am looking for a program that will hep me generate the G code and transfer it using the existing RS232 link and not require the data tape.

    thanks in advance
    Offbeat

  • #2
    If it is plain RS232 link then try the free single use version of Cadem lite.
    http://www.cadem.com/dnc.htm
    You have to register now to run it, but it is a nice little program.
    Otherwise anything from the old DOS Modem programs, Qmodem etc, to Windows Terminal, now it is Hyper-terminal which is a bit of a Pain.
    Max.

    Comment


    • #3
      Thanks Max, I shall download a copy and give it a try.
      In the longer term I intend to convert it to modern electrics but this might do for now.
      On reading my original post I think my keyboard needs a blow out with the air line to get all the biscuit crumbs from under the keys!!!!
      Offbeat.

      Comment


      • #4
        Have you looked around on the Denford forum? There are ORAC modification threads in several forums but the guys over there are probably the most active with them.

        Here's a link to the ORAC forum but look around on the rest of the site as well & you may find what you're needing. http://www.denfordata.com/bb/viewforum.php?f=43 If there's a way to hack into the controller and get straight onto the step & direction pins you can control it with Mach3 through the parallel port on an XP PC and get away from all the proprietary software. There's at least 2 very good support sites for Mach3 which helps a lot.

        I have an ORAC retrofit close to being finished but I started with just the bare lathe and a picked clean lower cabinet so my experiences wouldn't be any help to you.

        Sure wish I had your ATC.
        Milton

        "Accuracy is the sum total of your compensating mistakes."

        "The thing I hate about an argument is that it always interrupts a discussion." G. K. Chesterton

        Comment


        • #5
          Yes I landed lucky there, only paid £80 for the complete machine a few years back, it was ex-college and probably never done more than a few hours work since new.
          The ideal situation would be to get an interface board to work with the old stepper drivers, but I think there might be some issue with the control signal voltage or so I read somewhere.
          I already have a copy of Mach3.

          Will follow up your links.

          Would be keen to see your conversion.

          Comment


          • #6
            Here's a link to my ORAC conversion and another one to Jim Glass's.

            http://bbs.homeshopmachinist.net/thr...highlight=ORAC

            http://bbs.homeshopmachinist.net/thr...hlight=denford
            Milton

            "Accuracy is the sum total of your compensating mistakes."

            "The thing I hate about an argument is that it always interrupts a discussion." G. K. Chesterton

            Comment


            • #7
              Hi excuse me jumping in here I just got orac cnc lathe myself but it has no chuck. Can anyone tell me what the spindle nose taper is so I can look for a chuck to suit. Also I need a key to reset the emergency stop button anyone got a spare.

              Appreciate any help.

              Comment


              • #8
                The ORAC is based on the Emco Compact 8 manual lathe and has a somewhat unique spindle nose taper. All that I could find in past searched is "similar to DIN 55021."

                Unfortunately, the only stuff you'll find anywhere that'll bolt on is original Compact 8 or ORAC parts and are expensive. I put an ER32 collet chuck on mine that was originally meant to fit a Sieg mini-lathe. I had to drill 3 holes to fit the ORAC flange but otherwise it bolted right on.
                Milton

                "Accuracy is the sum total of your compensating mistakes."

                "The thing I hate about an argument is that it always interrupts a discussion." G. K. Chesterton

                Comment


                • #9
                  If there's anyone in the UK that needs help converting a denford machine, or need one converted. PM me and i'll give you my contact details. I've converted hundreds of denford machines to mach3.

                  Comment

                  Working...
                  X