Aluminum Wafers (3)
3mm steel balls (24)
Grease, as lubricant and glue
L-shape bed support (1)
Bolt M3 x 20 (3)
Washer M3 x 8 x 0.8 (3)
Nyloc nut M3 (3)
Wafers should wobble freely so don't fasten the nyloc nuts. 😁
Fill some grease in the grooves on the wafers. Grease acts as a lubricant and sticks the steel balls to the grooves. Put 3 steel balls in each groove and stack the wafers.
Carefully attach the stacked to the bed bracket. Only 3 holes are used due to dimension limitation but it's enough. The nyloc nuts don't have to be fastened. Adjust the nuts so they won't fall out and allow the wafers to wobble freely.
Take the distances below as a reference to install and adjust your Z frame pieces. These distances are not fixed, because the rear left leg and the right leg of the bed are floating, and only the front left Z frame piece is more relative to the origin (0, 0) of your extruder setup.
You can also design and modify the fixed bed mount to slightly change your location of origin.
Bearing block KFL08
RH bolt M5 x 10 (2)
Nut M5 (2)
Z stepper
Bolt M3 x 06 (4)
2GT 20T pulley, 5mm bore (1)
Steel Z stepper mount
RH bolt M4 x 08 (2)
T-nut M4 (2)
Lead screw
2GT 20T pulley, 8mm bore (1)
Lead screw nut
Bolt M3 x 06 (4)
Printed spacer (1, STL here)
Make 3 sets. Setup 2 drives at the left and 1 at the right.
To prevent interference with the frame, the two Z stepper mounts located at the left side of frame are different. Also be ware of the pulley orientations.
In case that some kits don't contain enough M3 x 06 bolts, please use a longer bolt with nuts as shortener. (Eg. one M3 x 10 with two M3 nuts.) The bolts should not touch the middle wafer.