Where do I place the brass piece the lead screw of the gantry on the CNC?

New Home Forum Mostly Printed CNC – MPCNC Advice – MPCNC Where do I place the brass piece the lead screw of the gantry on the CNC?

This topic contains 7 replies, has 2 voices, and was last updated by  Stuart Smith 2 years, 7 months ago.

Viewing 8 posts - 1 through 8 (of 8 total)
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  • #24481

    Stuart Smith
    Participant
    #24482

    Barry
    Participant

    That’s for the lowrider, which that part hasn’t been uploaded yet, and the 3d printer. For the mpcnc we use a piece of allthread.

    #24485

    Stuart Smith
    Participant

    I would much rather implement this in than to use a piece of allthread. It’s stainless and and a much smoother thread. Although I wonder if the Gcode already written would be different because of the travel difference? Or is it the same? I don’d have any 5/16 laying around to compare.

    #24487

    Stuart Smith
    Participant

    Can you at least tell me where the nut is secured for the 5/16 althread?

    #24488

    Barry
    Participant

    You’d need to modify the z axis then. I’m not sure if there’s an easy way. The allthread works really well though.
    https://goo.gl/photos/5ti6Fh9K1KpKKjDD6
    https://goo.gl/photos/2Z8c4yDWyo1qTQrs9
    https://goo.gl/photos/DNGo4sCzVbkX3YNu6
    Then there was this. Poor thing went up and down several thousand times in about 20 hours.
    https://goo.gl/photos/sLooSqcD1Rxz2NgQ7

    I’ve recently pulled the Z assembly apart to swap out the Dewalt 660 for a DC spindle and there’s really not a lot of wear on it. With it running down inside the parts it’s not picking up much dust either. I lubed it with some lithium grease when I put it together and just relubed it for the first time when I put it back together with the new spindle. Other than that, I’ve not really messed with it.

    Here’s the middle assembly instructions.

    Middle

    #24493

    Stuart Smith
    Participant

    Very impressive. I’ll go ahead and use the althread then. I finally saw where the nut goes. I was looking in the gantry section. Thanks for your help.

    #24496

    Barry
    Participant

    No worries. If it fits down the channel you might be able to attach the bearing to the bottom with screws. Not sure how well it would hold though.
    https://www.v1engineering.com/wp-content/uploads/2015/07/IMG_20160527_130356.jpg

    #24516

    Stuart Smith
    Participant

    I only printed at 40% infill. So I don’t think that will do unless I print a new one at 24 hours LOL.

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