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CNC3AX

Discussion in 'General Driver Card Chat' started by marcomartim, Oct 6, 2010.

  1. marcomartim

    marcomartim Member

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    I use a modified version of CNC3AX created by Laurent Fouga
    She is a board of low cost, supports 3 "steep motor unipolar to 5A - 80V
    There are many colleagues in another forum I attend, using the modified CNC3AX very successfully.
    The original FETs, were replaced by IRF640, with 12V power
    Electrolytic capacitors have been changed to 100V

    I am very pleased with it.

    Double-sided version (original) PCB
    http://mac1.ifrance.com/cnc3ax/pcb_s.PDF
    http://mac1.ifrance.com/cnc3ax/pcb_c.PDF

    Parts List
    http://mac1.ifrance.com/cnc3ax/lisezmoi.txt

    face - simple
    http://www.guiacnc.com.br/index.php?action=dlattach;topic=67.0;attach=336

    Tests
    http://www.4shared.com/document/B3iKvfVp/Diagnstico_CNC3AX.html

    scheme
    http://go2.wordpress.com/?id=725X1342&site=areacnc.wordpress.com&url=http%3A%2F%2Fareacnc.files.wordpress.com%2F2009%2F05%2Fcnc3ax_sch.pdf&sref=http%3A%2F%2Fareacnc.wordpress.com%2F2009%2F05%2F14%2Fesquema-da-placa-cnc3ax%2F

    other links:
    http://search.4shared.com/q/1/cnc3ax

    Vídeos:


    Hugs
     
  2. TigerPilot

    TigerPilot Well-Known Member

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    The only problem that I have with it is that it is unipolar. Your stepper can give more power if it is connected in bipolar. There are many boards for unipolar but I personally never considered them just because of this limitation.
     
  3. kyyu

    kyyu Active Member

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    marcomartim, thanks for the info. I will definitely check that out. I have been looking at various diy designs lately.

    @TigerPilot,
    I used to think that way about unipolar, but it's not 50% less torque. It supposedly gives 70% of bipolar. Also, 5A is double the current of the stock phlatprinter board, so that's actually a more powerful board. I personally would seriously consider using unipolar, and even contemplate getting one of the hobby cnc kits to try out and also practice soldering up a board.

    -Kwok
     
  4. marcomartim

    marcomartim Member

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    Indeed, in the unipolar drive there is a loss of torque, but has a higher rotation. With a higher voltage, the loss of torque is not very significant.

    If you have engines 5,6,8 wires, can call in unipolar or bipolar

    Hugs
     
  5. marcomartim

    marcomartim Member

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    I had a router, X axis = 950mm, Y = 750mm, Z = 90mm. 3 engine with steep 15kgf.cm
    I used it to CNC3AX changed (since this machine was sold).

    I'm building a table for (the plasma cutting) X 3000mm Y = 1650mm Z = 150mm.
    I'm with CNC3AX assembled and test very successfully engines 15kgf.cm = 208 ozf.in (Z axis), 32kgf.cm = 445 ozf.in (Y axis) and 42kgf.cm = 583 ozf.in (X axis)

    On that machine I intend to use Sketchup + Phlatscript. When you have more progress, I comment here.

    Hugs
     
  6. kyyu

    kyyu Active Member

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    I spit the discussion of Unipolar vs Bipolar to another thread: viewtopic.php?f=127&t=2236 We can talk specifically about the CNC3AX driver board here.

    -Kwok
     
  7. kram242

    kram242 Administrator Staff Member

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    Thank you Kwok
     

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