Ender 5 Triple Z (E5TZ)

V2 is now available at this printables page.

If you want to print fast, I recommend looking at V2

NEW: step file for V1 (May 2023 version) added 

MAY 2023 UPDATE TO V1

• Reinforced arms
• M3x4mm heatset insert supported - if you use heatset inserts use the round holes on the face that the screws enter, otherwise put the usual hex nuts on the nut traps on the other side
• full set is now indeed a full set(thanks
   @Ixian_67258)
• tighter grip with arm and bed carrier

Simple, budget(-ish) and effective triple Z implementation for the ender 5 that doesn't block access to the front of the printer like pretty much every dual Z mod

I've done a speedboatrace on it with a corexy motion system @20000mm/s^2 here and the bed barely shakes (unlike my first speedboatrace attempt with just super struts)

What to print: 

• I recommend printing full_set.stl since it has all the parts on one bed and orientated correctly to avoid supports. It is located in May 2023 latest version/full_set.stl
• There are also files for individual parts if you need just one of the parts

Features:

• Independent control of all 3 lead screws - if you add a stepper expansion board you can do Z tilt adjust(klipper recommended)
• Very rigid if you use a denser infill
• Uses original Ender 5 bed carrier and rear Z system
• You probably have most of the parts lying around anyways

Bill of materials:

• 2x NEMA 17 steppers - I used these and were the right length
• 2x T8*4 350mm lead screws and nuts
• 2x 8mm 370mm linear rods
• 8x M3*8mm socket head screws
• 2x 5mm to 8mm couplers
• 2x LM8UU linear bearings
• 10x M4*8mm socket head screws
• 10x M4 drop in T nuts
• Stepper motor extension cables - length depends on where your electronics are

Mods:

• REQUIRED Rear electronics case mounting
• EITHER Klipper and secondary motherboard OR daisy chain two stepper splitters
• RECOMMENDED rotate the heat bed 90 degrees anticlockwise so cable exits through the rear, zip tie the cable to the Z offset screw

Instructions for install:

1. Attach stepper motors to left and right stepper mount
2. Attach both stepper modules to left and right front corners 
3. Insert LM8UU bearing into the bearing slots
4. Use 4 M3*15mm bolts and 4 m3 nuts for attaching lead screw nuts
5. Detach bed cables
6. Unscrew bed leveling knobs and remove heat bed
7. Put left and right arm under bed
8. Put left and right clamp on top of carrier, aligning holes
9. Put 8 M3*35mm bolts through the holes
10. Use 8 M3 nuts on the bottom sides, don't tighten all the way
11. Insert the linear rod from the top down through the linear bearing into the stepper module
12. Add the lead screw into the nut until about 5cm of it is below the arm
13. Attach the lead screw couplers and tighten
14. Keep rotating the lead screw until the coupler sits tight against stepper shaft
15. Tighten 5mm side of coupler
16. Attach Z top parts - first load it with T nut and M4 bolt, attach to linear rod, rotate so nuts face the front extrusions and tighten bolts
17. Tighten bolts on the arms
18. Reattach bed and cable
19. Move the bed to touch the nozzle in the rear back point
20. Move nozzle to front left and rotate the front left lead screw so it also contacts
21. Repeat for front right
22. Plug in stepper cables
23. Put some PTFE grease on the lead screws and run it up and down a few times
24. (Recommended) Use these cable clips to tidy up wires

Photos for reference

Print settings:

• ≥50% grid infill
• 0.25 layer height
• 4-5 walls
• 6 solid layers top and bottom
• Recommended: PETG, 250 degs C