Unable to square gantry/x, y axis

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This topic contains 5 replies, has 2 voices, and was last updated by  Gary 6 days, 2 hours ago.

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  • #97017

    Gary
    Participant

    Hi,

    I’m having trouble getting my gantry/x and y axis square.

    The parts were purchased from Ryan, so no issues with the print.

    Tension bolts A, B, and C are all loose (say nuts a couple of mm from the plastic pieces.)

    In the pic is a cast iron milling square fixture (it is the squarest thing I own I use it regularly on my milling machine) gap i about 1.5mm and the milling square is 65mm long, so there seems to be a significant out of square condition.

    I have tried tightening tension bolt B to no effect.

    I have also tried various tensions on tension bolts A and C also to no effect.

    I have assembled it and disassembled several times, but it always shows the same error in the same direction.

    The conduit fits well, and is the correct size – 25.4mm. It moves smoothly through the bearings…

    Help please…..please!!

    TIA

    Garysquare

    Attachments:
    #97039

    Ryan
    Keymaster

    A few more pictures would help, I can’t really check your build or see what is going on with that one.

     

    The other suggestion is from the FAQ’s, use it for a bit, see if it “breaks in” some.

    #97040

    Ryan
    Keymaster

    The only thing that could actually be assembled wrong is the Z axis. A twist, or just improper spacing is possible (hard to do but possible).

    #97067

    Gary
    Participant

    Hi Ryan,

    Thanks for replying.

    checked the z axis – looks Ok.

    Extra pics attached. Not able to figure out what is going on – the out of square is significant – if 1.5 mm at 65mm, then over 600mm (my build size) I’m looking at over half an inch 🙁

    None of the tension screws seem to make any difference.

    Don’t see how I could cut anything close to square….Let me know if the pics don’t show you what you need to see…

    cheers

    Gary

     

    Attachments:
    #97073

    Ryan
    Keymaster

    Go through the instructions again. You can not check anything without all 6 rails in place, the 2.5″ do need some tension.

     

    There are a ton of things you need to learn before you have to cut perfect exact squares. At least drawing a crown or five. What happens is some of the bolts move a bit (to a more correct position, some even get less tension) and things tend to work better after a little use. No idea why this happens for some people but it does.

    A full build picture really helps, at least the complete center assembly, as I said it has to be complete before you can check or adjust anything.

     

    #97080

    Gary
    Participant

    Thanks Ryan,

    I won’t worry about it at this stage then. I had removed the z axis from the centre assembly for the pictures. Fully assembled the whole centre unit shows the error. Have taken it apart and put it back together multiple times …

    Will complete the build of the whole device and check it out then. Was just trying to complete this stage as well as possible before proceeding.

    cheers

    Gary

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