test pattern, please evaluate

New Home Forum Mostly Printed CNC – MPCNC Advice – MPCNC test pattern, please evaluate

This topic contains 12 replies, has 3 voices, and was last updated by Profile photo of Dalton Porter Dalton Porter 3 weeks, 5 days ago.

Viewing 13 posts - 1 through 13 (of 13 total)
  • Author
    Posts
  • #32613
    Profile photo of Dalton Porter
    Dalton Porter
    Participant

    I’ve used my mpcnc to cut large things (on the scale of inches), but it seems to be not so good at small things. I mainly see the problem with small text. I’m attaching a jpg of a test pattern which has shapes and text. The shapes look pretty good – parallel sides, correct size. The text seems a bit squiggly. I went back and adjusted the gantry as described in the assembly documentation – make sure all bearings are touching, etc.

    Please look at the output and tell me if you think this is as good as I can hope for, or is something clearly amiss?
    I’ll attach the e10 file too if possible.
    Thanks.

    #32623
    Profile photo of Jeffeb3
    Jeffeb3
    Participant

    I only see the input pattern. I’m assuming the e10.jpeg is the e10 file?

    #32624
    Profile photo of Ryan
    Ryan
    Keymaster

    If you have arc commands on turn them off, or if they are on turn them off. See if that helps.

    What speeds are you using, how long is your z axis?

    1 user thanked author for this post.
    #32626
    Profile photo of Dalton Porter
    Dalton Porter
    Participant

    There is a .jpg and an e10.jpg. rename the e10.jpg to just e10 if you want to see the e10 file.

    #32627
    Profile photo of Dalton Porter
    Dalton Porter
    Participant

    In estlcam, arc comands are on. I’ll try turning those off.
    Speed x,y is 12mm/sec.
    z-axis conduit is 14 in. I was planning to also use it as a 3d printer, but that idea is fading.

    #32632
    Profile photo of Ryan
    Ryan
    Keymaster

    I would say your lines are excellent for a working length of 14″, when 4″ is about as tall as you should go without other means of support.

    #32633
    Profile photo of Dalton Porter
    Dalton Porter
    Participant

    correction, speed x,y is 25mm/sec, not 12mm/sec

    #32634
    Profile photo of Ryan
    Ryan
    Keymaster

    I have a 6″ that prints very very well with a mk8 style extruder.

    • This reply was modified 3 weeks, 5 days ago by Profile photo of Ryan Ryan.
    1 user thanked author for this post.
    #32636
    Profile photo of Ryan
    Ryan
    Keymaster

    After you try without arcs, try 12. Only change one thing at a time please.

    Arcs usually only work for very large arcs and saves a lot of lines of code, but for small arcs usually better without.

    #32641
    Profile photo of Dalton Porter
    Dalton Porter
    Participant

    this is the image with arcs turned off in estlcam. It already looks better. The text is less squiggly.
    I’ll also try speed reduction.
    I suppose the last option is cutting down the machine height. I suppose go back to the calculator.
    I want mill two by N dimensional lumber. What do you think the minimum height would be to support that?
    I suppose it depends on the length of my longest bit.

    Thanks.

    #32663
    Profile photo of Jeffeb3
    Jeffeb3
    Participant

    Oh, this is a scan from a pen. I didn’t look closely at it because I thought it was the input file.

    It’s not the pen mount’s fault is it?

    #32679
    Profile photo of Ryan
    Ryan
    Keymaster

    Looks good, at that size it could be your surface, the pen mount, Pen mount tension (should be light try a felt tip), etc. I think it’s pretty good now.

    #32703
    Profile photo of Dalton Porter
    Dalton Porter
    Participant

    I used a ball point pen with Ryan’s printed pen mount – which is also a spring.
    I’ll try it with felt tip as well.

Viewing 13 posts - 1 through 13 (of 13 total)

You must be logged in to reply to this topic.