Cable Chain for Z axis

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This topic contains 8 replies, has 6 voices, and was last updated by  Barry 1 month, 3 weeks ago.

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  • #52739

    Teo Nordström
    Participant

    Hello. My MPCNC has been put away for a couple of weeks now as I have had other things to do but I want to start working with it again soon. I Want to use Cable chains to make it look more “slick” and I have fixed a rest for the Z Cable chain. I had an idea of how I wanted the Cable chain fastened, but then I remembered the thing that is said in the Z axis build guide: “Please do not attach anything to this assembly above the tool mount“. I have seen Pictures of this (for example this one from Martin S)

    If this is strictly forbidden, how do people do to fasten the Cable chains? If i put them in the gantry the chain won’t be able to move with the z axis and the wire will be pulled with it.

    I have a couple ideas of how I would go around this problem but I would like to see how other people are doing.
    Thanks!

    #52952

    Mike
    Participant

    I used the z_mount_fixed.stl part from the following thingiverse project. It attaches to the top XYZ part with a single bolt to clamp it in place, no drilling or anything. It is great for twist-tying power cables, etc. to and has worked very well for me so far.

    https://www.thingiverse.com/thing:2301104

    ZChainHolder-1

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    1 user thanked author for this post.
    #53435

    RandyS
    Participant

    I’m with you on needing to clean up the wiring on the Z-axis.  The X and Y axes can also use cable chains to good advantage.  This was my design and can also be found at https://www.thingiverse.com/thing:2743770 .  I think it would be worthwhile making provisions for an attachment in any future revs of the XY blocks for sure.

    #84140

    David Doyle
    Participant

    I used the z_mount_fixed.stl part from the following thingiverse project. It attaches to the top XYZ part with a single bolt to clamp it in place, no drilling or anything. It is great for twist-tying power cables, etc. to and has worked very well for me so far.

    https://www.thingiverse.com/thing:2301104

    I just printed this for my build.  Before I munge something together did you by any chance design a mount for NEMA 17 motors? 🙂

    #84381

    Jutoto
    Participant

    20190118_1952-1

    for the moment I fixed mine on the z tube.

    I think the advice: “Please do not attach anything to this assembly above the tool mount” is especially valid for the suction system which are much heavier and deported from the Z axis. In addition these systems usually add mass on the same side as the spindle and so add force where there was already.
    the chain support does not add much strength and in addition it is opposed to the strength of the spindle.

     

    • This reply was modified 2 months ago by  Jutoto.
    • This reply was modified 2 months ago by  Jutoto.
    #84443

    Barry
    Participant

    It really should be attached to the XY part and not the Z.  Any wobble up there will be magnified at the end mill.  Your build is pretty short though, so might be alright.  Just keep this in the back of your mind if you get weird cuts.

    1 user thanked author for this post.
    #84456

    Jutoto
    Participant

    ok, thank you.
    also I have a very short Z height, the minimu 2.8′, but I will keep it and see when I will work on accuracy for the moment I have so many thing remaining before completely finish the machine.
    This let me time to find some thing better

    • This reply was modified 2 months ago by  Jutoto.
    #84930

    Jutoto
    Participant

    It really should be attached to the XY part and not the Z. Any wobble up there will be magnified at the end mill. Your build is pretty short though, so might be alright. Just keep this in the back of your mind if you get weird cuts.

    Do you think that my Z chain support will interfere more than this vacuum system?

    #85013

    Barry
    Participant

    It really should be attached to the XY part and not the Z. Any wobble up there will be magnified at the end mill. Your build is pretty short though, so might be alright. Just keep this in the back of your mind if you get weird cuts.

    Do you think that my Z chain support will interfere more than this vacuum system?

    That’s mine, the hose and cords are hanging down from the ceiling at the center of the cuttable area, so no side loads.  It’s also not like that anymore either, the tube on the new spindle is a lot shorter.  My lowrider does the same thing.  The vac hose, stepper wiring, and router power are mounted to a swing arm that follows the gantry around, so there’s nothing pulling on it.  That was 3 years ago.  I’ve learned a lot since then!

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