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  • V2.4r2

V2.4 Z Drive Motor Tensioner Mod

by Dr-Info

v2 · source 8e5067f · 18 files

Braced motor tensioner for z drive

Download all (.zip), 7.7 MBView source on GitHub
4,330 views315 downloadsupdated

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STL models (12)

STL models: Show or hide 12 files
  • STLs/Skirts/250/250_front_rear_skirt_a_x2mod.stl
    STLs/Skirts/250/250_front_rear_skirt_a_x2mod.stlSTL324 kBDownload
  • STLs/Skirts/250/250_front_rear_skirt_b_x2mod.stl
    STLs/Skirts/250/250_front_rear_skirt_b_x2mod.stlSTL324 kBDownload
  • STLs/Skirts/300/300_front_rear_skirt_a_x2mod.stl
    STLs/Skirts/300/300_front_rear_skirt_a_x2mod.stlSTL281 kBDownload
  • STLs/Skirts/300/300_front_rear_skirt_b_x2mod.stl
    STLs/Skirts/300/300_front_rear_skirt_b_x2mod.stlSTL281 kBDownload
  • STLs/Skirts/350/350_front_rear_skirt_a_x2_mod.stl
    STLs/Skirts/350/350_front_rear_skirt_a_x2_mod.stlSTL354 kBDownload
  • STLs/Skirts/350/350_front_rear_skirt_b_x2mod.stl
    STLs/Skirts/350/350_front_rear_skirt_b_x2mod.stlSTL354 kBDownload
  • STLs/[a]_2.4_base_plate_a_mod_x2.stl
    STLs/[a]_2.4_base_plate_a_mod_x2.stlSTL471 kBDownload
  • STLs/[a]_2.4_base_plate_b_mod_x2.stl
    STLs/[a]_2.4_base_plate_b_mod_x2.stlSTL471 kBDownload
  • STLs/[a]_base_plate_a_mod_x2.stl
    STLs/[a]_base_plate_a_mod_x2.stlSTL150 kBDownload
  • STLs/[a]_base_plate_b_mod_x2.stl
    STLs/[a]_base_plate_b_mod_x2.stlSTL150 kBDownload
  • STLs/z_motor_mount_a_mod_x2.stl
    STLs/z_motor_mount_a_mod_x2.stlSTL460 kBDownload
  • STLs/z_motor_mount_b_mod_x2.stl
    STLs/z_motor_mount_b_mod_x2.stlSTL462 kBDownload

CAD files (3)

CAD files: Show or hide 3 files
  • CAD/[a]_2.4_base_plate_a_mod_x2.stepSTEP248 kBDownload
  • CAD/[a]_2.4_base_plate_b_mod_x2.stepSTEP249 kBDownload
  • CAD/v2.4_z_drive_motor_tensioner_mod.stepSTEP21 MBDownload

Documents (1)

Documents: Show or hide 1 file

Images (2)

Images: Show or hide 2 files

README

V2.4 Z-Drive Motor Tensioner Mod

This mod was originally submitted by edwardyeeks on August 25th 2020 and was graciously adopted by Dr-Info on February 18th 2024

Mod that replaces the motor tensioner assembly in the z drive to make it better braced and eliminates chance to rotate/twist when you tension and potentially when the drive operates. The stock motor tensioning had the tendency to flex if not tightened/installed carefully, causing the closed loop belt to easily rub against the pulley flanges. I prefer being able to lock down the entire z drive as a single unit, hence the design choices.

Unfortunately, the skirt geometry changes, so you will have to reprint the front skirts entirely. Besides that, you only need to reprint the motor bracket and the base plate for this mod.

For this reason, this mod is entirely OPTIONAL. Perhaps consider it if you are starting a new build or you wish to improve over the current z drives and are willing to print more plastic.

Installation & Parts Required.

Installation_Guide

In the image, the heatset inserts are inserted from the top of the motor mount; you can easily install this from the bottom as well.

Extra parts that you will need (2x per drive, therefore 8x in total):

  • 8x M3X12mm bolts
  • 8x M3X5X4mm heatset inserts (the specced ones in Vorons)
  • 8x 1mm M3 washers/shims (7mm OD max, optional)

Tensioning process is the same as stock V2.4, with exception of needing to tighten down two more bolts once you are done. For the skirts, the hole placement for the bottom panel clips are shifted compared to the original; however, you only need to adjust the bottom clip position relative to the bottom panel. The bottom panel remains unchanged and does not need any tweaking. There are bolt access holes to allow you to reach the grub screws of the pulley from below, but note that due to the skirt and belt cover, you will need to remove those for access.

-edwardyeeks (edwardyeeks#6042)

Change log

2024-02-18 - Dr-Info - Mod adopted 2022-05-10 - skohls - Added compatibility for v2.4r2 with updated versions of the bottom plates

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