Description

This is another Y-Carriage for the Tevo Tarantula. This replaces both acrylic parts of the Y-Carriage. The part is designed for those people who are using either the stock roller hardware or a MGN12H Linear Rail for the y-Axis.

This Y Carriage is part of my Heat Bed Assembly:

• Precision Thumb Wheel: https://www.thingiverse.com/thing:2782455
• Flexible Corner Clips for Glass Plate: https://www.thingiverse.com/thing:2842383

Functional Design

The carriage is designed to remove the common stress points for other designs, which occur commonly at the point of attachment (corners of the mounting plate). It also uses the engineering concept of the I-beam to provide maximum stiffness along each arm, while reducing the overall weight of a printed part to be as close to the original acrylic part as convenient to the design.

This design achieved greater stiffness than even a 4mm Aluminum Plate (though could not improve on Alu's weight reduction).

Printed Parts

1x Lower Plate
2x Top Plate (or) Top Plate_NoSupp

Non-Printed Parts

8x M3x15 Bolts
8x M3 Nuts
All original Y hardware for rollers/linear rail
Optional - 8x M3 Washers

Supports/No Supports

The original version included fillets in the design and these created drastic overhangs that ended up with significant stringing. However, it was not unusable, as the printed version shown in the pictures is the original design. But in an effort to reduce potential problems or at a minimum to reduce the requirement for post-processing, I have switched the fillets to chamfers and the angle should be less than 45deg. This is true for all models.

The top plate was redesigned to remove the embedded holes for the screws/bolt. I did this to remove the required support material for those sections (it was horrible to remove). It should look much cleaner now, and the design has ample room for the screw heads to show above.

However, there was a design issue that I could not resolve. I wanted to ensure that my design maintained the original print profile and did not increase the height of the print surface. This requires a small section at the tips of the top plate to be printed with supports. However, I have also included in the files a no support version, but to remove the requirement for supports, I had to increase the height of the build plate by 5mm. I don't know if people will care, so I included both files.