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Y-Bushing Spacer for Mendel, Parametric

by karmavore, published

Y-Bushing Spacer for Mendel, Parametric by karmavore Feb 6, 2013
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Summary

If you find yourself wanting to raise your bed off of the LM8UU Y-Bushings in your mendel, you can use this thing to do it.
A commenter wisely notes that this isn't technically necessary, because one could just move the y-smooth rods above the crossbar. This, however, sacrifices a non-trivial quantity of build volume on the z-axis.
So I created this for my switch from the two-build-plate design of the Prusa Mendel to the single-build-plate design approach, and I needed to get that single bed higher than the crossbars.

My thanks to Prusa and his y-bushing design, from which this item was derived. Thanks, too, to Triffid Hunter, whose bar clamp allowed me to make my spacer somewhat shorter.

Instructions

Print and put between your bed and your y-bushings.
????
Profit.

If the bottom of your heated bed gets hot, you might be wise to print these out of ABS to avoid issues down the road.

Of course, you should use your own configuration.scad and metric.scad, but mine are included here for completeness.

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No need to fear breaking things to me. :) I went this way to reclaim as much z-space as possible. Looking at your photo, it saved me perhaps 15 millimeters of height on cool things like Wolfie Howls. So flipping the news-breaking on its head, there is no longer any need to move your Y smooth rods above the cross bar. ;)

I hate to break it to you, but this part is not required. On the V2 prusa you simply mount the Y axis smooth rods above the cross bar. Have a look at this thing here, You can see the arrangement of the bars...

http://thingiverse-production.s3.amazonaws.com/assets/8d/f4/bc/af/02/Simplified_Y_axis.JPGhttp://thingiverse-production....

Incidentally, I wish the v2 Prusa instruction on the Wiki actually said this. It's still touting the lower-print bed and higher-print bed approach.

No need to fear breaking things to me. :) This approach reclaims as much z-space as possible. Looking at your photo, it saved me perhaps 15 millimeters of height on cool things like Wolfie Howls. So flipping the news-breaking on its head, there is no longer any need to move your Y smooth rods above the cross bar. ;)

I see what you mean :)

I hate to break it to you, but this part is not necessary. In the V2 version you mount the y-axis smooth rod above the cross bars. Have a look at the pictures... http://www.thingiverse.com/thing:23094http://www.thingiverse.com/thi... and http://www.thingiverse.com/thing:21503http://www.thingiverse.com/thi...

You can see the arrangement there :)

Prusa Y-Axis Torsion Motor Mount
Prusa V2 Y-Axis Corner Nut Traps

See above.

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