Merge branch 'master' of https://gitlab.fabcity.hamburg/hardware/open-lab-starter-kit

docs/machines/desktop_cnc/Rationale.md

@@ -114,3 +114,9 @@ Make base plate holes 5.5mm to allow some play.
 Make pockets to fit not well cut linear guides of the base.
 
 Side holes of the Y plate are not necessary. The Y plate is already well attached to the shoulder supports.
+
+Fix the attachment of the Z Axis ball screw.
+
+The Y sensor can be attached directly to the machine frame.
+
+The Y plate must make space for the Y back bearing holder!