3 Wheel X carriage attachment and X belt adjuster for the Tarrantula

thingiverse

Tevo Tarrantula Left Hand 3 Wheel X Carriage Attachment with an X Belt Tensioner. I created this 3 wheel belt tensioner after struggling to remove play in my X carriage using the original off-center adjustments. I borrowed ideas from various other 'Things' to create this design. The 'Things' that inspired me are - https://www.thingiverse.com/thing:2034743 (Modular X Carriage) https://www.thingiverse.com/thing:1704100 (Belt Tensioner) Hardware Needed: 4 M4x10mm Countersunk Bolts 5 M4x35 either Button Head or Cap Head Bolts 1 M5x25 Cap Head Bolt 2 M5x35 Cap Head Bolts 1 M4X20 either Button Head or Cap Head Bolts 1 M4x40 Cap Head Bolt 10 M4x10 either Button Head or Cap Head Bolts 6 M4 Nuts 2 M5 Nuts 10 M6 Washers 2 M5 Washers 8 M4 T-Nuts. 4 Wheels. Don't be discouraged by this list, as some of the hardware can be recovered from the original X carriage mounting assembly. Assembly: 1. Loosely connect the center plate to the X carriage with countersunk 4mm bolts and T-nuts. 2. Assemble 2 wheels to the RH plate using long 5mm bolts (Place washers under the screw heads). 3. Attach the RH plate and wheels to the center plate using 5mm bolts and 5mm nuts. 4. Insert spacers between the RH and center plates, loosely attaching them with 4 4mm bolts and nuts (Don't forget to place a 4mm nut into the recess on the bottom). 5. Insert the 3rd wheel into the 'Saddle' and secure it with the short 5mm bolt and a nut. 6. Insert the Saddle assembly between the RH and center plates, secure it with a 4mm bolt and nut. 7. Use the 20mm long 4mm bolt to tighten the saddle against the 20mm V channel which should pull the other 2 wheels into contact with the opposite side of the 20mm V channel. 8. When all 3 wheels are in contact with the V channel, tighten the inner 2 4mm Countersunk bolts using a Hex key through the holes in the RH plate. When they are tight and the center plate is secure to the X carriage, remove the 20mm long bolt from the saddle and ease the saddle away from the V channel. This will give you access to the outer 2 4mm Countersunk bolts through the holes in the RH plate. Once all are tightened, replace the 20mm bolt and ensure all 3 wheels are making contact with the V channel. 9. The remaining assembly is straightforward.