Parametric pen holder for CNC
Description
This Is A Pen Holder For Your Cnc. There Is No Moving Parts (Hence No Mechanical Play), No Spring Needed As It'S The Abs Part That Is Acting As A Spring. It'S Designed To Be Sturdy In X And Y Direction But Flexible In Z. It Can Be Preloaded With A An Ajustable Screw (As Seen In The Photo Between The Bottom Leg And The Extruded Aluminium). I Preloaded Mine At 5 Grams, That'S Enough To Write With My Pen, And Thanks To This Preloading I Only Need To Move My Z Axis By 0.3Mm Up And Down To Write And Stop Writing. But If You Go Further Down It Doesn'T Damage Anything As The Abs Part Will Bend And Keep A Moderate Pressure On The Pen. I Tried To Go Down 1Mm After Contact And The Force Increase From 5 To 10 Grams. So You Don'T Need To Have A Perfectly Accurate Machine To Draw Consistently. Openscad Model Included So You Can Adapt It To Your Machine.
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