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weak bearing holder on x-carriage

Posted by acc

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acc

weak bearing holder on x-carriage
December 08, 2012 02:56AM

Registered: 11 years ago
Posts: 29

Hi,

the side near the gantry, with one bearing looks like this, when generated for 12mm ball bearings:

20121207215100small.jpg

A while ago I pushed my extruder "a bit" smiling smiley

to clean it, and... the connection broke:

20121207215139small.jpg

Is there any reason to have a gap there? Why not to fill it, the same way it is one the other side with 2 bearing holders? It will be much stronger.

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nophead

Re: weak bearing holder on x-carriage
December 08, 2012 11:16AM

Admin
Registered: 17 years ago
Posts: 7,879

It allows the bearing to float horizontally but not vertically so that it is not over constrained. I.e. the connection is thin in one direction and thick in the other.

Perhaps the depth of the carriage should increase when using larger bearings. Why are you using 12mm bearings?

[www.hydraraptor.blogspot.com]

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acc

Re: weak bearing holder on x-carriage
December 08, 2012 12:19PM

Registered: 11 years ago
Posts: 29

I have 12mm rods everywhere on XYZ (450mm, next printer 500mm); I found 8mm too weak in my first Prusa printer...