v0.94 Update pulley tooth count (2021/09/12)
Print 6 belt clamp sticks and 1 fixed mount of kinematic coupler in less than 1 hour.
Download STLs here.
Pre-assemble pulley housings. They act as frame brackets too.
Adjust aluminum extrusion positions.
Attach carriages, belts & springs.
Configure the firmware.
The instructions later show steps for 1 belt drive. Make 3 identical belt drives.
Drive carriage
1 drive carriage
1 inner carriage plate
2 2GT 20T idlers without teeth
2 round head bolt m5 x 35
10 thin nuts m5
L-shape bed carriage
1 flat L-shape bed carriage (you have the other 2 already)
4 bolts m3 x 10
Actions
Assemble the drive carriage as shown in the picture.
Place the new flat L-shape bed carriage at the left rear Z drive.
1 top pulley housing
1 round head bolt m5 x 35
1 belt clamp base
2 thin nuts m5
1 2GT 20T idler with teeth
Attach housing to frame
Rounded head bolt m4 x 8
T-nut m4
Use the requested hardwares above if the hardwares in the picture (an early stage prototype) don't align the description.
1 spring housing
Smaller spring 1.0kg
1 Round head bolt m5x40
2 thin nuts m5
Larger spring 1.5kg
1 Round head bolt m10x45
2 thin nuts m10
Attach housing to frame
Rounded head bolts m4 x 8
T-nuts m4
1 stepper mount
1 2GT 16T pulley
1 belt clamp base
1 stepper NEMA17 (you already have one)
2 bolts m3 x 8
2 washers m3 x 8 x 0.8
Attach housing to frame
Rounded head bolt m4 x 8
T-nut m4
T-nuts m4
Round head bolt m4 x 8
Top pulley housing
Stepper mount
Actions
The distances shown here are for SK-Go² 9-point leveling bed frame.
You don't have to follow this layout, just configure your measurement in the firmware settings.
2 printed belt clamp sticks
Bolt m3 x 12
Nut m3
Wash m3 x 8 x 0.8
Actions
To ease the pressure to the belts, the round edges of printed belt clamp sticks should face the steel belt clamp base. Pass the belt through pulleys and leave each end 5~10 cm for easy access.
The belt tension is high enough as long as no tooth skipping happens under the weight of bed.
Bolt m3 x 10
Nut m3
Wash m3 x 8 x 0.8
Actions
Pull the spring out and hold it with a plier, attach it to the drive carriage as shown in the picture.
Bed
9-point leveling bed (you already have it)
2 nylon tube 7x3x14
3 bolt m3 x 08
3 nut m3
3 steel balls 8mm with thread
3 washer m3 x 8 x 0.8
Printed fixed mount of Kelvin coupler
Fixed mount (STL here)
Bolt m3 x 10
Nut m3
Wash m3 x 8 x 0.8
Actions
Attach steel balls to the 9-point leveling bed frame as shown in the pictures.
Replace the original nylon tubes at 3 & 9 o'clock with the new longer 14mm ones.
Attach the printed triangle fixed mount to the left front L-shape bed bracket.