I just started playing with a Roland Modela MDX-40A about a week ago and have been using VCarve Pro to explore 3D contour milling in various materials. So far I have tried insulation foam, cutoffs of 2x4' pine studs and some blocks of basswood meant for carving. So far, all of my wood projects have been covered in a lots of tiny, fuzzy bits of wood (burrs?), and I'm trying to figure out what is causing it and how to fix it. Pictures are attached of some of the attempts so far.
For all of my projects so far I am using 2-flute, ball nose, upcut end mills stepping progressively down from 1/4" diameter to 1/8" and finally with 1/16". I believe the spindle is running at roughly 40-50IPM and 12,200RPM, though I think I brought the movement speed down really far (40% or so) after experiencing some plunging problems.
From my initial research it sounds like this fuzziness could very likely be the result of using upcut mills rather than downcut - the set of endmills I have access to is upcut only. Would this be the most likely culprit for this problem? If so, can someone point me towards a source where I can buy some 1/8" and 1/16" end mills from? If not, what else could I look into as possible causes?