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X-carriage with fore & aft fan mounts

by Wired1, published

X-carriage with fore & aft fan mounts by Wired1 Sep 8, 2012

Description

My take on this popular item to design. This time in Heekscad and this time with dual fan mounts fore and aft to maximise X axis travel.
I have retained the same fan mount used on Jonas Kühling's carriage to suit existing fan holders.
Uses 4 x LU8UU bearings held with my machine screw holders and set up for a T5 or XL belt.
Also features a convenient loom anchor point to tidy up the wiring.
Loosley based on many other carriages around at the moment but originally from the Mendel Prusa v2 by Josef Průša :)

Recent Comments

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OK, it's raining here today... so I've added a version for the LME8UU bearings. I fattened up the holders to take the extra width and the bearings will protrude 1mm as I didn't want to redraw the whole carriage.
Yes they are also 16mm dia and 25mm long for the 8mm variety. Will have to look into them for the next printer :)
I don't know if they are better. It's just what I happen to have available. :) At some point I'll probably buy some Igus RJMPs instead though.

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Instructions

Print it out, uses 4 metres of 3mm PLA and will take about 3.5 hours to print. 0.35mm nozzle, 0.25 layer height, 2 perimeters, 2 layers, 25% fill and 45 degree fill angle.
Set the extruder on the back 22.5 degree angle (not sure why we keep putting all the extruder holes in there - the back angle gives the best clearance).

Two versions now:
XC1 for the LM8UU linear bearings, and
XC2 for the LME8UU bearings.

Use one or two of these fan holders and VGA fans thingiverse.com/thing:29158
What about an LME8UU version?
OK, it's raining here today... so I've added a version for the LME8UU bearings. I fattened up the holders to take the extra width and the bearings will protrude 1mm as I didn't want to redraw the whole carriage.
Lol, there is always another improvement isn't there. I had never heard of them until you just mentioned them. They are only another mm in diameter and 1mm longer so it should be possible just to sneak another half mil here or there... are they significantly better than the LM8UU's?
I don't know if they are better. It's just what I happen to have available. :) At some point I'll probably buy some Igus RJMPs instead though.
Yes they are also 16mm dia and 25mm long for the 8mm variety. Will have to look into them for the next printer :)
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