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Squaring of the X-Gantry - gap at one side

Original WorkBee Z1+

I have completed all steps in the assembly up to and including 6. Y-Gantry Assembly, step 5. Problem is I have noticed a 3mm gap between the Y-plate assembly and the base frame as the gantry is pushed as far as it can go to the front and to the back. When the gantry is at the front this gap is on the left and when at the back it moves to the right. I have tried loosening and retightening everything on the gantry while in place countless times. I have taken the gantry off to see if I could find a problem with the gantry or the base but I can’t find anything wrong. I have now reassembled everything again and have the same 3mm gap. It seems like something (I was thinking the base) is not square but I have checked for square when putting the base together and it was fine, I rechecked when I took it all apart and it was still good.

There is also no binding when moving the gantry, it moves freely along the whole length front to back.

I can close the gap with mild force but it springs back when released. I could maybe shim something but obviously this is not the ideal solution.

Can anyone suggest what the problem is/what to look for/what to adjust? I have attached a pic of the gap, the opposite side with no gap and then the whole setup.

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Thanks

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Hi Dennis,

Thanks for your email.

This is either due to the base frame not being square. Measure the diagonals to check if it is exactly square.

Or if you carry on with the guide, once everything is tensioned there is a step that squares the gantry up: 2. Testing Your WorkBee

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I have the same problem closer to 4 or 5 mm. My base is exactly square, as are my y gantry end plates, measured multiple times in various places on the diagonals. I understand the solution offered in the guide but this will force a correction and put an unnecessary strain on the leadscrew nuts etc. Is there a more acceptable solution?? Thanks.

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Hi Mik, correcting it on the flexible couplers and lead screws is correct. Because it could just be one side is on a different point of the thread to the other.

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Author avatar Dennis Chamberlain will be eternally grateful.
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