FT5 Locking Z movement

thingiverse

I set up an interlocking mechanism between left and right side of the bed to ensure consistent Z-height. The pulleys are all made using F625ZZ bearings, with longer bolts through the pulley being M5x30 and fixed in 2040-profile. You will need a long GT2 loop ordered from Adafruit, two 500mm pieces of 2020 profile to carry the rods, one 500mm piece of 2040 profile for the steppers, two straight metal stepper supports, four 100mm pieces of 2020 profile to receive the larger pieces and some corner pieces to fix all 20xx to the chassis. Two extra GT2 pulleys are also needed with an internal diameter of 8mm. Sufficient time and engineering skills are recommended for this project. Mounting recommendations begin by lowering the Y-rails until they match the top of the steel rods, keeping a couple of mm between the rods and the profile. Install the rods with supports and the bed without fixing them, making sure to get the timing belts over the threaded rods beforehand. With the rods in place, run the bed to the top position and fix the top supports to the 2020-profile. Run the bed to the bottom position and align the supports and the supporting 2020-profiles until everything runs smooth. Fix all supports, then install the stepper. Install the pulleys on the 2040 profile with an 80mm 2020 profile. Run the long belt along its path, loosening the locking screws on the GT2 pulleys on the threaded rods and adjust tension with one of the pulleys on the 2040 profile. Avoid overtensioning the belts. Adjust both sides of the bed by measuring from the bed to a point on the X-gantry. Fix the locking screws of the GT2-pulleys for secure alignment.