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P8X32A 4 axis CNC controller (G-Code) — Parallax Forums

P8X32A 4 axis CNC controller (G-Code)

scottascotta Posts: 168
edited 2007-04-04 12:20 in Propeller 1
Google video of a 4 axis CNC controller based on the Parallax P8X32A.

It is driven by G-code from Windows or Linux.

Two axis system shown:

video.google.com/videoplay?docid=3676939654724547603

Comments

  • Graham StablerGraham Stabler Posts: 2,510
    edited 2007-03-27 08:34
    neat

    What's the strange noise?

    Graham
  • scottascotta Posts: 168
    edited 2007-03-27 12:25
    The camera recording it's own auto-focus noise...
  • Graham StablerGraham Stabler Posts: 2,510
    edited 2007-03-27 12:39
    wow that's loud.

    What piece of equipment did you whip the 2-axes from, it looks like it would make one half of a nice hot-wire cutter?

    Graham
  • scottascotta Posts: 168
    edited 2007-03-27 12:52
    [noparse]:)[/noparse] KODAK would like to sell you a camera, but not a video camera...

    The machine itself is very quiet.

    X axis is a single 1/2 inch THK rail from an old pick and place machine,
    the y axis is a printer. (Your Mother Was A Hamster And Your Father
    Smelled Of Elderberry! - Monty Python)

    I would love to cut foam propeller blanks, then wrap them with carbon
    thread passing through an epoxy tank.
  • Graham StablerGraham Stabler Posts: 2,510
    edited 2007-03-27 13:16
    Neep!

    Filament winding is something I'm interested in, I've got a thing for carbon fibre [noparse];)[/noparse]

    Graham
  • scottascotta Posts: 168
    edited 2007-03-27 13:22
    Same here... Actually carbon is a little over the top for a wind mill.
  • JTCJTC Posts: 60
    edited 2007-03-27 13:23
    Scotta,

    · Did you do the programmng ? I am very impressed. I have a long way to go learning

    the language before I could tackle a project like that.

    Great job with a great chip.

    Jim
  • scottascotta Posts: 168
    edited 2007-03-27 13:31
    Thanks !

    Can you tell what the 2 axis machine is plotting from the video [noparse]:)[/noparse]

    It's all assembler, except for the spin wrapper. It started out as a wood burner
    control back in December (the month my first chip showed up). Its my
    first project in assembler.

    I would recommend prototyping in Spin, it saves a lot of time.

    Here is the breakdown on cog usage:

    '1-spin
    '2-serial
    '3-encoder
    '4-pid
    '5-pwm
    '6-profiler
    '7-lcd
    '8-unused
  • babinda01babinda01 Posts: 54
    edited 2007-04-04 07:36
    Hi,

    Great looking project.

    Can you please let me know the make encoder counts per sec you can handle with your system.

    I have been toying with the idea for a hobby milling machine, but have always been a bit worried of running out of top end speed.· Does the one prop chip handle all 4 axis?

    Regards

    Andrew
  • scottascotta Posts: 168
    edited 2007-04-04 11:29
    Its doing 3 now, 4 is not out of the question but the PWM frequency is very
    audible.

    At 60 inches a minute the motors are only turning a few revs/second.
    With 900 line encoders (3600 ppr), the encoder routine will not miss
    counts.

    Milling aluminum at 60 inches a minute takes a pretty stiff machine.

    Scott
  • Graham StablerGraham Stabler Posts: 2,510
    edited 2007-04-04 12:03
    Scott, I meant to ask this earlier, is this going to be a product or is it just for you?

    Graham
  • scottascotta Posts: 168
    edited 2007-04-04 12:20
    It should be a commercial product soon.
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