KP3S Pro S1 Dual Z Axis mod

NOTICE:

This MOD is based on the KP3S PRO S1 dual rail Z-axis MOD and all precautions apply the same. However, it was designed based on the premise of using M4 bolts without drilling. 
 

*Additional design references

https://cafe.naver.com/makerfac/188461

THANK YOU!!

1. Printing parts

1) - 1x dual_z_motor_mount(or Front-cut version, option)

2) - 1x motor_spacer

3) - 1x 2040_spacer

4) - 1x 2040_cover

5) - 1x mgn12h_base

6) - 1x f688zz_holder

7) - 1x f688zz_holder_2(Print out if the top is completely covered with the 2020 profile.)
*If the profile covers the entire top, the screw heads may interfere with assembly.

8) - 2x mgn12h alignment zig

9) - 2x 2020profile_corner_bracker

 

*No need support 
*wall loop 5
*Infill 30% or more recommended
*Rotate 117 degrees around the z-axis
*Recommended to use brim

2. The other Parts 

1) 1x MGN12H 250mm

2) 1x Tmc motor driver(2225or2208or2209)

3) 1x F688ZZ flange bearing(If both ff688zz_holder are used as printouts, 2 bearing are required.)

4) 1x D19L25 5x8 coupling (Can replace coupling of similar diameter *D16~23)

5) 1x Lead screw(pitch2 lead8) 300mm

6) 1x Lead screw bracket (lead8) 

7) 1x 2040 profile 350mm

8) 1x 2020profile 220mm or 300mm or 260mm~

*220mm fits snugly inside, and 300mm is the appropriate length to mount on the top.

And as long as it is over 260mm, there is no problem.

9) 1x Nema17 40mm motor

3. Bolts and nuts

-To attach the dual_z_motor_mount
6x M4x20mm
18x M5 wide washers
12x M4 nuts

-To attach the motor_spacer and Nema17 motor
4x M3x16mm
4x M3 washer 
4x M3 spring washer

-To attach the 2040profile_cover
4x M4x8mm  

-To attach the 2040profile(Tighten as many as necessary.)
6x M5x45mm 
3x M5x16mm
9x M5 T-nut for 2020 profile

-To attach the mgn12h
8x M3x8mm
8x M3 T-nut for 2020 profile

-To attach the mgn12h_base
2x M4x10mm 
2x M4 washer 
2x M4 spring washer
4x M3x10mm
4x M3 washer 
4x M3 spring washer

-To attach the lead_screw_bracket
2x M3x8mm 
2x M3 spring washer
2x M3 nuts

-To attach the ff688zz_holder
4x M3x5mm

-To attach the 2020profile_corner_bracker
8x M5x8mm
8x M5 T-nut for 2020 profile
 

4. UART setting(non_essential)

https://github.com/nehilo/Klipper-KingRoon-Printers

https://3dpmisosiru.blogspot.com/2022/01/kp3s-orbiter-extruder-mount.html

*I used two tree's 2209 TMC driver and wrote the cfg as below.

[stepper_z1]
step_pin: PA6
dir_pin: !PA1
enable_pin: !PA3
full_steps_per_rotation: 200
microsteps: 32
rotation_distance: 8

#####################################
#               TMC                 #
#####################################
[tmc2208 stepper_x]
uart_pin: PA5
run_current: 0.650
stealthchop_threshold: 0
interpolate: true
sense_resistor: 0.110
driver_TBL: 2
driver_TOFF: 3
driver_HEND: 3
driver_HSTRT: 0
driver_PWM_GRAD: 8
driver_PWM_LIM: 9

[tmc2208 stepper_y]
uart_pin: PC13
run_current: 0.650
stealthchop_threshold: 0
interpolate: true
sense_resistor: 0.110
driver_TBL: 2
driver_TOFF: 3
driver_HEND: 3
driver_HSTRT: 0
driver_PWM_GRAD: 8
driver_PWM_LIM: 9

[tmc2208 stepper_z]
uart_pin: PC7
run_current: 0.650
stealthchop_threshold: 0
interpolate: true
sense_resistor: 0.110
driver_TBL: 0
driver_TOFF: 3
driver_HEND: 2
driver_HSTRT: 0
driver_PWM_GRAD: 8
driver_PWM_LIM: 10

[tmc2209 stepper_z1]
uart_pin: PA9
run_current: 0.650
stealthchop_threshold: 0
interpolate: true
sense_resistor: 0.110
driver_TBL: 0
driver_TOFF: 3
driver_HEND: 2
driver_HSTRT: 0
driver_PWM_GRAD: 8
driver_PWM_LIM: 10

[tmc2208 extruder]
uart_pin: PA10
run_current: 0.500
sense_resistor: 0.110
stealthchop_threshold: 0
interpolate: true
sense_resistor: 0.110

This mod attaches an additional lead screw and stepper motor to the KP3S PRO S1 dual rail Z-axis MOD.