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My CNC Router Built Around The New C-Beam Rail

Discussion in 'CNC Mills/Routers' started by Robert Bailey, May 30, 2015.

FRANKINATOR -- My CNC Router Built Around The C-Beam Rail

FRANKINATOR -- My CNC Router Built Around The C-Beam Rail

Discussion in 'CNC Mills/Routers' started by Robert Bailey, May 30, 2015.

I started this build about 2 weeks after the c-beam hit the store. I purchased a single bundle and ordered a TinyG to run it. where I work I have Hardware, Software and Mechanical engineers and they all got sucked into my project. they want one to do prototyping at the office, once they see mine...

My CNC Router Built Around The New C-Beam Rail
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  1. David the swarfer

    David the swarfer OpenBuilds Team
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    Definitely some sort of bug, might be related to pocketing faces that are very small. Pretty much the wrong tool for such small faces though. I tried the inside cut tool instead and it works just fine for many of those holes, but the right tool is the plunge hole tool. Easier and quicker to set up and does a better job of making holes than any other tool.
     
    #181 David the swarfer, Jun 30, 2016
  2. Robert Bailey

    Robert Bailey Well-Known
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    Well me and my buddy in crime worked on the new hold down and spoil board Saturday, we both looked at is and decided we over thought the peg holes. we just needed the corners on the spoil board
    and the peg holes on it since the material being cut will be on it. we surfaced it down 1/32 but still have about 10 thou rise from left to right. and we still cant get any help out of the blonde.
     

    Attached Files:

    #182 Robert Bailey, Jul 3, 2016
    GrayUK likes this.
  3. gwandad

    gwandad Well-Known
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    Well, on closer inspection, I was already on 800, so I went to 400,with some small improvement.
    I tried putting the current up,2.8 up to 3.2A, no different.
    In desperation I replaced the 24volt supply with the 48 volt supply I have ready for the new machine.
    That helped, but even with a cut of .2mm it would only get about 3mm or so in depth before breaking a bit or going off line.
    I have calibrated it as best I can, but i still get slightly oval holes.
    Before this some holes were more rectangular than round
    The only reason I am cutting aluminium is to get the plates for my new machine.
    A new package of bits arrived & performance lifted.
    I now have the 2 gantry plates which will be serviceable if not pretty.
    The new machine is a lot like Frankinator, so I'll be able to cut new ones. I have reached the conclusion that my beloved OX is only for light work.
    I don't believe the steppers are powerful enough & the flex is on the high side as well.
    I don't have the hard wheels.
    Basically I an asking far too much from it in its current form.
    I finished the cuts with Estlcam with the trochoidal cut which is a lot more forgiving to a bit of flexing, but it needed manual intervention in spots.
    I wouldn't go through this again for anything!
    Thanks for all your assistance.
    I hope to start publishing the new machine soon & then I'm sure you will see the results.
     
    #183 gwandad, Jul 5, 2016
    Bwillie likes this.
  4. Robert Bailey

    Robert Bailey Well-Known
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    I am using the nema 23 steppers from the store and a 24v 10amp supply and cutting aluminum. every machine is different. I broke bits because the plunge rate was to high, I think I was using about 5 inch per min
    when not ramping.
     
    #184 Robert Bailey, Jul 6, 2016
  5. David the swarfer

    David the swarfer OpenBuilds Team
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    Always ramp in aluminum.
     
    #185 David the swarfer, Jul 6, 2016
  6. Robert Bailey

    Robert Bailey Well-Known
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    yep I second that...learned the hard way:(
     
    #186 Robert Bailey, Jul 6, 2016
  7. gwandad

    gwandad Well-Known
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    I've got the earlier Nema 23 steppers which are half the torque of the ones you are using. I've got the big ones for the new machine.
    I am very jealous of you on a few points. You have a buddy that works with you...Gold!
    You can get assistance at work ie. someone to talk to...more Gold.
    You have a blonde "Lay About"...more Gold.
    I'm in a retirement village where nobody is interested in tech stuff, so I work alone with my limited skill set.
    I don't know anyone outside the village who is interested either
    Pets aren't allowed here, so no blonde!
    I'm not complaining, just explaining why I envy your situation & so much appreciate the input from you & David.
     
    #187 gwandad, Jul 6, 2016
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  8. Moag

    Moag Veteran
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    G'Day @gwandad ,I'm in Bairnsdale mate, can't help with the "Blonde Lay About" though mate.;)
     
    #188 Moag, Jul 6, 2016
  9. Robert Bailey

    Robert Bailey Well-Known
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    here is the files we used to create the hold down and the waste board. I tried the cheap board but after a little cutting oil they swell up. I picked up 3/4 inch
    sanded plywood for this round. then we mounted the spoil board and surfaced it 1/32".
     

    Attached Files:

    #189 Robert Bailey, Jul 8, 2016
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