PSU Open-X re-design

by PSUReprap, published

PSU Open-X re-design by PSUReprap Apr 12, 2012
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This version of open X was re-designed to better hold on the rods. This design eliminates the carriage's tendency to walk up off one of the rods. This design also reduces rattle in the carriage. This was accomplished by changing the angle at which the arm holds the bearings.


If you already have an open X, the only parts that have changed are the arm and the bracket. The new pieces will attach to the carriage you already have. If your REPRAP x-axis is built out of the laser-cut wood pieces from Techzone, then print the Techzone specific carriage. The rods are spaced closer together in this configuration, so the standard carriage will not fit properly.

Parts list:

Printed Parts:
1 Open X Carriage
1 Open X Arm
2 Open XY Brackets

Purchased Parts:
10 1/2" O.D. bearings
14 M4 bolts
14 M4 nuts
26 3/8" O.D. washers (optional)

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I like the bracket, it positions the bearing much better without resorting to a stack of washers.

I had problems with the arm though: even printed at almost solid fill using PLA, the arm tends to flex which allows the carriage to scew during transit. Perhaps beefing it up a bit will sort that.