Makerbot Y idler support

This is a piece I built to support the Y idler pulley on my Makerbot.

As shipped, the Y idler on the Makerbot is just a plastic pulley on a bolt screwed into the baseplate. This is really not a good design. The baseplate can flex, which makes it hard to properly adjust the belt tension. The pully is bare plastic turning on a fixed metal axle, without even a bushing, and can after a while get very noisy.

This modification adds a bracing arm which attaches around the end of one of the Y r