Dual Z Sync Mod with 852mm belt (Ender 3 and more)

thingiverse

This is a remix of SamTech3D's Dual Z Sync mod, though the parts have not much in common. I've designed this for the Ender 3 V2 with a cheap dual Z mod. It might work for other printers, too. The idea is to put a belt between your two stepper driven Z-rods, so that they stay in sync even without power on the machine. Some prequesits: - Dual Z Mod with two steppers (duh) - top mounting brackets for the Z-rods with floating bearings (see pictures) - enough Z-rod sticking out to fix a belt pulley (about 15mm should do) What you'll need: - 852mm 6mm wide GT2 loop belt - 2x 20 tooth (6mm belt) GT2 pulleys with a 8mm hole for the Z-rods - 2x 20 tooth (6mm belt) GT2 pulleys with a 6mm hole for the printed parts - 1xM5x40 round head bolt (Sometimes comes with printer parts) - 1xM5 hex nut - 1xM5 hex lock nut - 1xM4x14 cylinder head screw - 1xM4 nut for a 2020 extrusion (Spares come with most printers, picture 6) - Some silicone spray I also recommend flexible couplers for your Z-rods and Z-steppers (See last picture). These can help with binding and give you a little more Z-rod sticking out of the top. Now it's time to print out the parts! You will need two of the provided parts. I've printed them standing "up" with the big hole for the M5 head on the print surface. I've printed them in PLA+ at 210/55 with 100% Line infill and a layer height of 0.28 (0.2 first layer)