IslaWW wrote:mtylerfl wrote:Have you tried lead-in ramp cuts? You should be able to avoid ruining your top surface by allowing the bit to go to the appropriate depth prior to getting to the cut for the “good” portion of the material cutout.
Yes, I use lead-in ramps on all cuts, but this still does not resolve the problem.
If the first cut leads in to a depth of 1/8" , I'm still upcutting the top edge.IslaWW wrote:Your pass depths need to be deeper than the upspiral portion of the bit. 1/4" or more. In most cases compression bits are made to cut material in a single pass. Many smaller machines are not rigid enough to accomplish this accurately. If your machine cannot handle cutting the material in 2 passes, then you will have to use a different bit
mtylerfl wrote:Yes, that is what I was referring to also. You gotta get that bit to proper depth before it starts cutting the “good part” of the material so the upcut portion of the bit isn’t “ripping up” the top of it.
For 0.5” thick material, it shouldn’t be a problem cutting full-depth anyway. I cut up to 0.75”-thick Pine and Poplar at full-depth on the CarveWright CNC when using a 0.125” dia. EM. Hardwoods do require shallower pass depths...I’ll set pass depths at 0.3” or 0.4” on the CarveWright. I’ve broken only two 0.125” dia. bits in 11 years doing it this way!
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