precision

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This topic contains 12 replies, has 3 voices, and was last updated by  mcmasterp 2 years, 1 month ago.

Viewing 13 posts - 1 through 13 (of 13 total)
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  • #3503

    mcmasterp
    Participant

    I am starting the printing now. What kind of precision can we expect? Has anyone measured? My old mydiycnc monster machine is terrible, way to much slop.

    #3527

    Ryan
    Keymaster

    Shouldn’t be any different that most 3d printers. Mine is in constant use printing plastic parts for sale in the shop.

    #3531

    mcmasterp
    Participant

    Thanks for getting back to me, and thank you so much for the mpcnc.

    I was actually thinking more about cnc uses.

    My current machine is a diy minster that I’ve been trying to get up to snuff to work reliable. Mine has wiggle at the endmill thanks to problems all over. It’s cut size is only 30″ x14″ but its based on a terrible kit called mydiycnc. I replaced so much and dumped so much cash into it.

    Have you measured tolerances? Whats an idea of plunge rates or inchs per minute for feedrate?

    #3534

    Ryan
    Keymaster

    I have not found a way to measure the tolerances well.
    The hardest part for most people will probably just getting the machine really square. This cnc I made has blown away the expectations I had for it, so I have not pushed it too its limits yet, in speed or precision.
    Best I can say is you should have zero worries about tolerances in wood. Metal is where things start to change. In metal the expected tolerances increase dramatically. Not that they can not be obtained, you just need a good understanding of machining to get there. Not necessarily having to even do with the mpcnc.

    #3535

    Ryan
    Keymaster

    As for the plunge rates, I am still out of state. I can check what I use when I get home. It is pretty slow, this where a realnlead screw could help. Speed of the z axis. To me they are not worth the money.

    #3536

    mcmasterp
    Participant

    OK thanks. I do only wood so far.

    Any info helps. Especially feedrates

    #3537

    Ryan
    Keymaster

    All my videos have feedrates, just not plunge rates.

    #3538

    mcmasterp
    Participant

    Oh OK I’ll have to watch them. My current machine is limited to 15″/min. Not sure if that’s fast or slow lol.

    #3552

    Curt
    Participant

    I just finished my machine and I am TRULY impressed with the quality. I cut a rather complicated logo recently and used a 1/32″ endmill and it required three passes to get the depth I desired. I used this as a test to see how well it tracked in the same path and I can not see any “layers” in the cuts from the multiple passes.

    #3555

    mcmasterp
    Participant

    Good to hear clocey. Can we see pics or video?

    #3556

    Ryan
    Keymaster

    That sounds awesome! Such a tiny bit, any inconsistencies should have shown up or broken the bit. Sounds like you have a solid build for sure.

    Lets see it.

    #3567

    Curt
    Participant
    #3578

    mcmasterp
    Participant

    oh yeah thats repeatability right there.

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