Newbie First Run Problems!

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Thread: Newbie First Run Problems!

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    Question Newbie First Run Problems!

    After about a year building my first CNC router, using the PalentCNC Mk3/4 as the brain, I finally ran it this evening!
    Started off with a simple square on some scrap MDF, which worked well. Also ran a very simple V-Carve line, to see how it would run with the extra depth of cut, all went well.

    Then tried to V-Carve some text, which went very wrong! Thinking it was me running before I could walk, I went back to cut a simple circle, but it didn't come out at all correctly...

    Basic linear movement and homing in all 3 axes is fine, no obvious jamming on any of the lead screws & even ran above the workpiece in case the cutter loading was causing issues, but it followed a similar path.
    Linear movement is smooth (for such long thin lead-screws) at a feed of up to 1000 (100mm/s), cutting much slower at about 500 (50mm/s).
    Checked that the 36V PSU for the steppers wasn't being shorted out & that seemed fine too.
    Created code from a DXF, through CamBam 0.9.8 and into USBController, all the time the paths looked fine.
    Did a check on SPU & corrected that a while ago.
    Feels like it's something software-ish, steppers not getting the correct pulses, or some part of the

    So i'm a bit lost as to where to start looking to figure out what I've done wrong... Any guidance would be welcome

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    Default Re: Newbie First Run Problems!

    Can you post g-code?



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    Default Re: Newbie First Run Problems!

    Thanks for the reply.

    TEST_001 - Simple Square, cut ok can be seen on the RH side of the photo:
    ( Made using CamBam - CamBam CNC Software )
    ( TEST_001 2/4/2018 3:06:18 PM )
    ( T1 : 6.0 )
    G21 G90 G64 G40
    G0 Z5.0
    ( T1 : 6.0 )
    T1 M6
    ( Engrave1 )
    G17
    M3 S1000
    G0 X20.0 Y20.0
    G0 Z1.0
    G1 F300.0 Z-5.0
    G1 F800.0 Y100.0
    G1 X100.0
    G1 Y20.0
    G1 X20.0
    G0 Z5.0
    M5
    M30

    TEST_004 - Meant to be a 100mm dia circle, but turned into the odd arc shape middle upper of the board:
    ( Made using CamBam - CamBam CNC Software )
    ( TEST_004 2/4/2018 4:48:01 PM )
    ( T99 : 4.0 )
    G21 G90 G64 G40
    G0 Z10.0
    ( T99 : 4.0 )
    T99 M6
    ( Engrave1 )
    G17
    M3 S1000
    G0 X132.1378 Y71.0
    G0 Z2.0
    G1 F300.0 Z-1.0
    G3 F800.0 X44.9311 Y121.3488 I-58.1378 J0.0
    G3 Y20.6512 I29.0689 J-50.3488
    G3 X132.1378 Y71.0 I29.0689 J50.3488
    G0 Z10.0
    M5
    M30



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    Default Re: Newbie First Run Problems!

    TEST_003 - Meant to be an Engrave of the letters 'Will', only partially worked once, the rest was scribble. Also tried the same text using V-Carve, but the file is a bit long...

    ( Made using CamBam - CamBam CNC Software )
    ( TEST_003 2/4/2018 4:44:06 PM )
    ( T99 : 0.1 )
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    G0 Z10.0
    ( T99 : 0.1 )
    T99 M6
    ( Engrave1 )
    G17
    M3 S1000
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  5. #5
    Member jalessi's Avatar
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    Default Re: Newbie First Run Problems!

    GreatScott121,

    Try slowing the feed rate down by 80 percent and see what happens.

    Welcome to the Zone,

    Jeff...

    Patience and perseverance have a magical effect before which difficulties disappear and obstacles vanish.


  6. #6
    Member PlanetCNC's Avatar
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    Default Re: Newbie First Run Problems!

    Did slowing down the feed rate helped in any way?
    Which stepper drivers do you have?



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    Default Re: Newbie First Run Problems!

    Thanks for your comments.

    I've been upgrading to the TNG version of the software, took some time to get all the setting mapped across, so not had a chance to run a second test yet, plus it's freezing in my garage! Ended up logging in remotely in from my study, watching the machine via an old webcam

    I think it might be feed rate, while setting up the new system the steppers would stop turning as the step rate increased, then catch back up as the step rate slowed down again.

    Only using some cheap drivers at the moment, TB6600's I think, kept the project within the budget I had at the time. Planning on upgrading them at some point, might get a faster feed rate.

    Hopefully run a test over the next few days & post up how it all goes



  8. #8
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    Default Re: Newbie First Run Problems!

    All working smoothly now, thanks for the pointers
    Seems to get louder at lower feedrates & has a sweet spot where it almost sings as it moves lol

    Attached image of what I was expecting to come out! Workpiece shifted halfway through so it's not perfect, but it was only a test.

    Attached Thumbnails Attached Thumbnails Newbie First Run Problems!-cnc_run_ok-jpg  


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