Cheap Roller Carriage for DLT-180(Chinese Kossel 2020) with 20x20 M3 mount (same as on common linear rails) by Djhg2000

Last crawled date: 3 years ago

I wanted the magnetic carriages made for the FolgerTech Kossel by jartz, but my Sintron Kossel Mini lacked the proper mounts. This remix adds M3 screw mounts in a 20x20 mm square pattern.
The pattern is offset 3.5mm from center due to the mount pattern being too large for the original design but from my testing it doesn't make a difference. In theory the effector should be slightly rotated around the Z-axis but rotating the hotend has no effect on the printing and the rotation isn't visible to the naked eye (I doubt it could even be accurately measured). Furthermore tightening the adjustment screw will decrease this offset. Even so I'm trying to figure out a way to make it perfectly centered without changing the fundamental design, but it's a low priority change.
Update 2016-09-02:
I have modified the roller in an attempt to eliminate the 3.5mm offset, however I haven't had the time for a test print yet. The adjustable side may need some structural reinforcements but if you print slowly or print these with a lot of infill then it should be fine.
One of the nuts will probably need to be held in place by hand while assembling, but inserting this screw first and tightening it last should cause the least trouble. Since the nut lacks support for horizontal movement it may want to skew the assembly if it's tightened before the others.
Version 2 has only been assembled in theory for the moment, but I realize releasing this contributes a lot more to the community than holding off for another few weeks until it's all tested. It may work just fine or it may break on the first print, proceed with caution (but please leave feedback if you do!) and feel free to examine and improve on my design.