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Fixing my 3D printer's Missed Steps problem due to broken bearing supports

Tiertime UpBox Y Axis bearing supports broken [ Known problem !!] replaced with Aluminium

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The Novice Engineer27/09/2020 17:15:07
73 forum posts
47 photos

My printer [A Tiertime UpBox+ with an enclosed and heated chamber] had a problem with a Y Axis layer offset that ruined the print.

 

Examination of the printer revealed the Y axis belt was loose.

img_3583.jpg

img_3585.jpg

This was due to the Plastic Bearing support for the Y Axis drive shaft had broken. This is a known problem with this and similar printers in the range.

img_3589.jpg

The previous owner had reinforced the supports with a 3D printed cover. However the Left hand support had completely fractured into 3 bits. The Manufacturer has these plastic supports available for ~$3  from China ... a 2 week wait !

img_3587.jpg

Since I have modified my printer to keep the enclosure temperature up to around 60-70 C to prevent ABS prints distorting I decided that the Plastic bearing supports should be replaced with something a little more substantial in Aluminium.

I removed the 2 supports and measured up the good one, fortunately the dimensions came up to whole numbers so machining was going to be a bit easier. A Tee slot cutter was used to cut the recess for the bearing

img_3588.jpg

After a couple of hours on the milling machine and a bit of fettling with a file and emery cloth I had a working machine again.

img_3592.jpg

 

Edited By The Novice Engineer on 27/09/2020 17:21:03

Edited By The Novice Engineer on 27/09/2020 17:32:13

Jeff Dayman27/09/2020 18:11:34
1896 forum posts
45 photos

Great looking repair! hope it sorts out the Y axis issue for you.

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