Before easter I tried to print some presents for my daughter and her cousin.
To make it personal I printed her names on the designated presents.
Text on things comes out better when printing with 0.2 mm slice thickness.
The printed objects looked quite ok, but I was wondering why there was a strange repeating relief on the side of the objects.
This relief results from a little wobbling of the z-axis.
One can only see this when printing with high quality.
After re-centering the z axis the wobbling disappeared for a while.
At the end of the print the z axis was wobbling again.
It was caused by the high printing speed.
When printing very small parts the printer shakes very much.
Because the z axis is only fixed at the bottom, the top has enough space to move out of the center.
A quick look at thingiverse showed I was not the only one having this problem.
Thing no. 4101 was exactly the kind of fixation I was looking for.
The original part is a substitute to one z-axis clamp. Also it didn't have anything to fix the z axis.
Some little changes for perfect fit, a hole for a 608 bearing and the possibility for an upgrade without disassembling the z axis and my mendel was fixed.
The holes were perfect - I even didn't need any screw to fix the bearings.
The wobbling is much better now and the relief is also reduced but still visible.
If anybody also needs this part - you can download the design on thingiverse.
Greetings from the lake of constance