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Grizzly - The Double-Z I-Beam Ox

Discussion in 'CNC Mills/Routers' started by Retrosmith, Nov 19, 2017.

  1. Retrosmith

    Retrosmith Guest
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    #1 Retrosmith, Nov 19, 2017
    Last edited by a moderator: Jan 12, 2018
  2. Anthony Bolgar

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    Will be following this build. Nice idea.
     
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  3. Bad Sequel

    Bad Sequel Veteran
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    Wow cool build! :thumbsup:
     
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  4. GrayUK

    GrayUK Master
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    This is one I'll be watching. :D
    My next build will be with a fixed gantry and moving platen, and I like the idea of a rising Z axis. :thumbsup:
    I guess you will be running both Z motors to a single port, as you would with the Y axis, so keep an eye on the current demand on your drivers. :rolleyes:
    Please keep us up-to-date with your progress, step by step, as I'm sure many will be checking out your design. :)
    Good Job, :thumbsup:
    Gray
     
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  5. GrayUK

    GrayUK Master
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    Sorry, I didn't see any details on your electrics, but usually the two Y motors are supplied from the same point, with one having its wires reversed because of travel. Likewise, I thought the Z motors would be supplied similarly but without the reversion on the wires. :rolleyes:
    I didn't realise you were set up with individual drivers. Too much reading of control boards with on-board drivers. :)
    My bad. :banghead:
    Gray
     
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  6. GrayUK

    GrayUK Master
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    Just found your other thread about dual slave control :thumbsup:
    Gray
     
  7. gta18

    gta18 New
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    Having separate z motors will introduce unevenness in the level of the gantry unless there is a mechanical bottom stop right?
     
  8. gta18

    gta18 New
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    Yes, once the motors are powered up they will be in sync and wont have any issues but from a standstill no power then u should make sure u have stops on both sides.


    I have this issue on my Mendelmax 3 printer which has separate motors, nowim designing something to mechanically sync both sides either with a belt and pulley system or connect both screws with pulley/belt.

    Just my .2cents.


     
  9. Anthony Bolgar

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    I had the same problem with my spindle, I snapped one off while tightening it. Found 8mm replacements that are much better.
     
  10. GrayUK

    GrayUK Master
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    Hope you sort the problem without too much trouble. :)
    Now...... I did notice that little technical hitch with the black wiring when I saw the picture, but thought it was just sleeving! :banghead::banghead::banghead::banghead:
    You can get little coloured identifying rings which slide onto the cable.
    Good luck :thumbsup::thumbsup:
    Gray
     
  11. JustinTime

    JustinTime Master
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    While wiring can be the reason for your problem it can also be some settings that are too high, like acceleration or motor current, to name a few. Since you have the same problem on all axis' I would have called 'setting' as my first problem.
     
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  12. JustinTime

    JustinTime Master
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    That is correct!
     
  13. GrayUK

    GrayUK Master
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    I know you have probably done this already but, have you tried the tabletop method?
    Just wire up the control board, the drivers and the motors with little flags on them, on the table, and see what works, and what doesn't.
     
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  14. GrayUK

    GrayUK Master
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    Just bits of tape wrapped around the spindles to define direction
     
  15. GrayUK

    GrayUK Master
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    Check out this video.
     
  16. GrayUK

    GrayUK Master
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    Can you check how much you are pushing through it? It sounds a bit too hot to me. Is it going nice and smooth and quiet? Check out this video.
     
  17. GrayUK

    GrayUK Master
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    I tagged a video to my last post
     
  18. GrayUK

    GrayUK Master
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    I'm sure you did, but, you did reverse one pair of wires for each axis because one motor is going in the opposite direction?? :rolleyes:
    I think you must have or it would have locked up.
     
  19. GrayUK

    GrayUK Master
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    Retrosmith.
    Hi. It would be great to see a video of your machine in action. Any chance? :rolleyes:
     
  20. GrayUK

    GrayUK Master
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    Well done!! :thumbsup::thumbsup::thumbsup:
    Video not working though. :(
     
  21. GrayUK

    GrayUK Master
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    Seems pretty solid to me. :D
    Do you get any flex at the very top of your towers? :rolleyes:
    Well done. Good job!!!
    May the chips fly for you!! :thumbsup::thumbsup::thumbsup:
     
  22. GrayUK

    GrayUK Master
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    I see your point, and I like the idea of the fixed dust shoe. I'd take a look a earth magnets, and the good old door draught excluder brush.
     
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