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I've designed dual Z mod for my TwoTrees Sapphire Pro. This mod helps a lot with bed shaking while fast printing and printing with high accelerations, it provides better stability for heatbed. You can also use dual z leveling with this addon.

I printed some calibration cube's with 7k acceleration to compare printer with and without the mod.

Parts:

3D Print:

4x - Profile_Mount_Bracket
1x - Stepper_motor_mount
1x - Main_Z_Plate
1x - Bed_Plate_Drill_Guide (To drill 5mm holes in printer's bed plate)

To buy:

x12 - 3x14mm Screw (to mount linear bearings and lead screw nut)
x12 - 3mm Nut
2x - Linear Bearing LMK8UU
2x - 8mm Linear Shaft 300mm
4x - 8mm Linear Shaft Support SK08
1x - Tr8x2 Lead Screw with Nut
2x - 375mm 2020 Aluminum Profile
1x - Usongshine Nema 17 17HS4401 Stepper Motor (with cable and stepstick)
4x - 3x6mm Screw (to mount stepper motor)
19x - 4mm V-Slot Nut
8x - 4x9mm Screw (to mount shaft supports)
11x - 4x6mm Screw (stepper mount and profile brackets)
1x - Stepper Motor Coupler
3x - 5x15 (or longer) Screw
3x - 5mm Nut
6x - 5mm washer

You can also use this mod only with lead screw, it will still work pretty well.

Print Settings:

All parts must have enough stiffness and strenght so I printed them with ABS.

Infill - 40% Cubic
Perimeters - 3
Top & Bottom layer - 4
I recommend using brim while printing with ABS
No supports

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Sapphire Pro Dual_Z Mod

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