by Woodsmoke, published
This is the carriage for a personalised Mendel90 currently under construction. The smaller carriage will accept a multi-material bowden extruder or perhaps a smaller direct drive.
The flexors connecting to the third bearing mount are shorter than they should be. But remodelling has been postponed until I learn openSCAD. Meanwhile the corresponding 40mm fan duct is on the drawing board and will be published soon.
The carriage is designed to accept LM8UU bearings, GT2 and T5 timing belts.
UPDATE: A trapped nut pocket (for the belt tensioner) is in the wrong place. If you still want to make use of the carriage, I recommend using a soldering Iron to melt a nut into the wall at the right place on the part. I will correct the file as soon as I can.
UPDATE 29/03/13: Trapped nut now on the correct side. Third mounting bolt socket included (consider it's position above the X axis bars when installing). A version for T5 timing belts has also been added.