SeeMeCNC Rostock MAX v2 Assembly Manual page 314

Rostock MAX v2 Assembly Guide
pulley is located. Pull the acrylic covers occasionally to check for this.
Another issue that will cause the problems shown above is known as "The Delta Arm Blues".
What happens is that one or more of the delta arm joints have a little bit of extra friction to them. When
the delta platform changes direction, this tiny amount of drag will cause a positioning error resulting in
the infill not completely meeting the perimeter. If you're seeing this kind of issue and your belts are in
good shape, it's time to test each u-joint for fit. If you've got a tight u-joint even after applying a TINY
amount of lithium grease or dry lubricant to it, you may have an axle problem. Contact SeeMeCNC
support for further direction.
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