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1510 produces double cut.

Discussion in 'CNC Mills/Routers' started by Philip Browne, Jun 11, 2020.

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  1. Peter Van Der Walt

    Peter Van Der Walt OpenBuilds Team
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    Yeah MDF is compressed dust
     
    #31 Peter Van Der Walt, Jun 29, 2020
  2. Philip Browne

    Philip Browne New
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    When I jog and its on 1mm it moves at least 10mm. I think that I had better start again. Have refreshed and now the columns are blank
     
    #32 Philip Browne, Jun 29, 2020
  3. Peter Van Der Walt

    Peter Van Der Walt OpenBuilds Team
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    Did you remember to close EaselHost (the part of easel running in the systemtray?) something seems to be hijacking your serial data

    Old settings are in your screenshots above luckily
     
    #33 Peter Van Der Walt, Jun 29, 2020
  4. Philip Browne

    Philip Browne New
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    Just deleted and uploaded openbuilds again and $110 and $111 are showing at 500. Should I try at these settings or put them up to 5000 each as you suggested?
     
    #34 Philip Browne, Jun 29, 2020
  5. Peter Van Der Walt

    Peter Van Der Walt OpenBuilds Team
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    Your screenshot had 10000 in them yesterday, which is definately too high
    Grbl default is 500, see gnea/grbl but 500 is super slow (many jobs run faster) - so yeah, set it to 5000
     
    #35 Peter Van Der Walt, Jun 29, 2020
  6. Philip Browne

    Philip Browne New
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    Thanks Peter
     
    #36 Philip Browne, Jun 29, 2020
  7. Philip Browne

    Philip Browne New
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    OK changed settings. Do I have to SAVE TO FIRMWARE? When I do this all the settings change
     
    #37 Philip Browne, Jun 29, 2020
  8. Peter Van Der Walt

    Peter Van Der Walt OpenBuilds Team
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    Yes you have to, but it wont change all your settings. Just the ones you modified
     
    #38 Peter Van Der Walt, Jun 29, 2020
  9. Peter Van Der Walt

    Peter Van Der Walt OpenBuilds Team
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    Alternatively, send the commands manually, again, read the Grbl Wiki: gnea/grbl
     
    #39 Peter Van Der Walt, Jun 29, 2020
  10. Brett Sutherland

    Brett Sutherland New
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    Very normal for MDF it is just dust held in a board form with resins cannot speak to the Aluminum sounds about right though.
     
    #40 Brett Sutherland, Jun 29, 2020
  11. Philip Browne

    Philip Browne New
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    Hi Peter

    Just found that the default settings for $110 and $111 is 1000 and for $120, $121 and $122 is 150.
     
    #41 Philip Browne, Jun 29, 2020
  12. Philip Browne

    Philip Browne New
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    I meant 10000
     
    #42 Philip Browne, Jun 29, 2020
  13. Peter Van Der Walt

    Peter Van Der Walt OpenBuilds Team
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    Not the default, the OBControl 1510 profile. But thats too high (you skip steps), Set it to 5000 please.
     
    #43 Peter Van Der Walt, Jun 29, 2020
    Last edited: Jun 29, 2020
  14. Philip Browne

    Philip Browne New
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    Hi Peter

    Just finished another cut and it's still the same but not as bad as it has been.
     
    #44 Philip Browne, Jun 29, 2020
  15. Peter Van Der Walt

    Peter Van Der Walt OpenBuilds Team
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    Turn it down some more then.
     
    #45 Peter Van Der Walt, Jun 29, 2020
  16. Philip Browne

    Philip Browne New
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    Thanks Peter

    Will do. When I have sorted this problem I will want to send you something for your trouble.
     
    #46 Philip Browne, Jun 30, 2020
  17. Philip Browne

    Philip Browne New
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    I'm also finding that the router bit is being hammered and needs replacing often
     
    #47 Philip Browne, Jun 30, 2020
  18. Philip Browne

    Philip Browne New
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    which of the settings do I have to reduce please?
     
    #48 Philip Browne, Jun 30, 2020
  19. Peter Van Der Walt

    Peter Van Der Walt OpenBuilds Team
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    Moving (Feedrate) too fast can ruin bits. But also moving too slow (causes heat build up)
    Clearing chips and cooling the endmill much prolonga life. If you have an air compressor, a small nozzle blowing out the chips and cooling the endmill is a quick win
     
    #49 Peter Van Der Walt, Jun 30, 2020
  20. Philip Browne

    Philip Browne New
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    The last cut I made the edges were very rough. Can you point me in the right direction on this one please?
     
    #50 Philip Browne, Jun 30, 2020
  21. Philip Browne

    Philip Browne New
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    I have a very good extractor so that there is very little waste under the dust shoe
     
    #51 Philip Browne, Jun 30, 2020
  22. Peter Van Der Walt

    Peter Van Der Walt OpenBuilds Team
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    - Speed and feeds
    - endmill type (o-flute, upcut, downcut)
    - use a finishing pass in your CAM
    - pictures help :) - so we can see whats up
     
    #52 Peter Van Der Walt, Jun 30, 2020
  23. Giarc

    Giarc OpenBuilds Team
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    Try using a straight flute endmill/router bit. I use only double straight fluted endmills for wood and I do not get tear out/rough edges. You should ramp into the material. For my depth of cut in wood and some plastics (HDPE) i use 1/2 the endmill diameter. So, for a 6mm endmill I cut 3 mm deep. For wood I cut at 2500mm/minute and it works well. Maybe you should try starting at 2000mm/min, or less, because your machine is larger and most likely not as rigid as mine.

    As Peter said, lead a small amount for a finishing path. When I do a finishing path I will leave about 0.2- 0.3 mm and I will cut it at full material depth. This cleans it up nicely and removes endmill marks from the roughing passes.
     
    #53 Giarc, Jun 30, 2020
  24. Philip Browne

    Philip Browne New
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    #54 Philip Browne, Jul 1, 2020
  25. Philip Browne

    Philip Browne New
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    Thank you so much. I am a complete novice but boy have I got the bug!!

    Keep safe from your friend in the UK
     
    #55 Philip Browne, Jul 1, 2020
    Giarc likes this.
  26. Philip Browne

    Philip Browne New
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    After adjusting feed and plunge settings, checking all of the belts and making sure that all is tight most of the problem has gone. I am still getting around 0.25mm over cut on the x axis. I have tightened belts and have noticed the following.

    Y AXIS.
    Undone belts and moved gantry forward and back without any problem. After connecting belts it is the same.

    X AXIS
    Undone belts and moved gantry forward and back without any problem. After connecting and tightening belt there is some juddering depending on the speed that I move the gantry from left to right and back again. There is no juddering when moving at low speed. Have checked the belt and the pulley wheel. No issues with either. Could it be an issue with the motor?

    Thanks guys.
     
    #56 Philip Browne, Jul 6, 2020
  27. Rob Taylor

    Rob Taylor Master
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    Juddering at speed is usually improperly set eccentrics on the wheels.
     
    #57 Rob Taylor, Jul 6, 2020
  28. Philip Browne

    Philip Browne New
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    Thanks Rob
     
    #58 Philip Browne, Jul 6, 2020
  29. Philip Browne

    Philip Browne New
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    It feels like the pulley is slipping on the belt though
     
    #59 Philip Browne, Jul 6, 2020
  30. Philip Browne

    Philip Browne New
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    Thinking about it you are probably right. Thanks again
     
    #60 Philip Browne, Jul 6, 2020
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