What about the fixed v wheels on the top

[gwilki]

Here is the most recent post by Chris on the subject:

LongMill V-wheel Tuning Video

Hi everyone - by popular demand we have made a video explaining how to tune eccentric nuts and V-wheels! V-wheels are fickle things; too tight and it impedes motion, too loose and it causes inaccurate cuts. They can be the cause of many movement-related issues such as: Y-axis skewing Inaccurate cuts One side of the Y-axis moving faster than the other Machine losing its zero See Chris go through the process, with extra diagrams and notes to guide you along the way. Let us know your thoughts! …