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Y-axis rework for Anet A8

IMG_0906.JPG Y-axis rework for Anet A8
IMG_2181.JPG Y-axis rework for Anet A8
IMG_3812.JPG Y-axis rework for Anet A8
IMG_3257.JPG Y-axis rework for Anet A8
IMG_2100.JPG Y-axis rework for Anet A8
IMG_0054.JPG Y-axis rework for Anet A8
IMG_6851.JPG Y-axis rework for Anet A8
IMG_2672.JPG Y-axis rework for Anet A8
7fa88737feb9ca8adf85c7e1af9a5f4c.png Y-axis rework for Anet A8
c863deb1426632f730dccd970c721b23.png Y-axis rework for Anet A8
d9b4cd7dd674158b5b36b45bea76547f.png Y-axis rework for Anet A8
a5426884f1ea6907891416bc55a49e16.png Y-axis rework for Anet A8
af49986273df3f3515bd416a14e4cb66.png Y-axis rework for Anet A8
a5f9ef1bfefbaf866db86f945c7556df.png Y-axis rework for Anet A8
Y_belt_bedmount_w_offset.stl Y-axis rework for Anet A8
Y_belt_bedmount.stl Y-axis rework for Anet A8
Y-axis_motor2.1.stl Y-axis rework for Anet A8
Y-axis_belt2.1.stl Y-axis rework for Anet A8
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Creation quality: 5.0/5 (1 vote)
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  • 1.6k views
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  • 20 downloads
  • 3 makes
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3D design format
SCAD and STL Folder details Close
  • Assembly2.scad
  • Y-axis_belt2.1.stl
  • Y-axis_motor2.1.stl
  • Y-axis_motor2.scad
  • Y_belt_bedmount.stl
  • Y_belt_bedmount_w_offset.stl

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Publication date 2021-09-15 at 23:20
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Published to Thingiverse on: 2017-01-18 at 14:03
Design number 520641
matsekberg

matsekberg

3D printer file info

3D model description

Added 2018-05-006:
So finally I uploaded the OpenSCAD files so that you guys can improve this design.

Removed 2017-04-14:
Removed the old versions, now there are files only for the latest version.
I have changed the spec for the threaded rods to 340 and 290 mm.

Added 2017-03-23:
I remade the two endpoints by moving the screws a little bit to the left to make more room for the belt and belt mount. Also made the cylinders where the screws are inserted into less depp for a more easy assembly into the printer. The files have version number "2.1".

Added 2017-02-19:
I have added a lower profile belt tensioner that gives 8mm more Y space in the front, file "Y-axis belt3.stl".
I have also added files for the belt mount under the heat bed, files "Y belt bedmount.stl" and "Y belt bedmount w offset.stl"

The stock design for the Y-axis on a A8 printer is not good. The Y-axis belt is clamped between the front and back of the printer. When the belt is tensioned the front and back will be bent towards each other and the Y Engine mount will rotate slightly. Also when the Y-carriage make direction changes the front and back moves a litte bit in relation to the print head and the frame. This can lead to imperfections on the print.

One solution is to print frame stabilizers to make the front/back more stiff and resilient to bend. However, the principle to have the frame cope with belt tension is wrong.

With this model I'm trying another approach, to decouple the Y-axis belt tension from the frame. The belt, roller, motor is contained in an integrated module. The belt tension is balanced by the two 6mm threaded bars and not by the frame. This module is then only attached to the back frame of the printer.
As a bonus we get a nice belt tensioner for Y.

There are two files for the belt mount under the hot bed. One to use when the hotbed H alu bracket is turned upside down (Y_belt_bedmount_w_offset.stl) and another when the H bracket is mounted with the middle section of the H downwards (Y_belt_bedmount.stl).

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