LM8UU bushing for standard Prusa i3 y carriage with

by euphy, published

LM8UU bushing for standard Prusa i3 y carriage with by euphy May 26, 2013
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Don't know why, but building my Prusa i3 (lasercut in nominally 6mm ply), after zip-tying the bearings into the Y-carriage, I found it bumped into, and was pushed up over the y motor at it's far end. Not much, maybe less than a millimetre, but that won't do.

The Y carriage is designed to have the LM8UUs zip-tied in and has holes 20mm apart to put the ties through and a slot to hold the bearing straight.

The other LM8UU bushings (such as the one this is based on) have wider spaced holes than the holes intended for the zip ties, so that's the modification here. I moved the holes closer in, which means fitting is tight, but not impossible, even with the bearing already zipped in.

The bushing gives a rise of a couple of mm, which is enough to allow the carriage to move without crashing into the motor.

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Hi Euphy, seeing how Vis0r link is down I design a belt holder for the Prusa i3 with higher length to match the added height that the bearing shoe creates You can share or not its up to you , and thanks for the lm8uu holders! they work! http://www.thingiverse.com/thing:993480

carriage bed belt compensation
by tibuck

I designed an extended y belt holder because of the height these bushing holders add to the bed. This causes the belts to stretch at the end of the y Axis. The Extended y Belt Holder is a single printed piece, where the spacer gives you the option to use your exiting part.

Thank Vis0r I notice that to and was hoping some did something about it.