The 1" thick circle is very flat and was held down with 6 clamps. 1/4" DC 2 flute end mill being the first, clearance toolpath and 1/16" up-cut for the second pass. The clearance pass is dead on 0.125" deep. The second pass appears to be 2 to 3 thousands deeper. If the 1/16 bit slipped in the collet the pass would be shallower rather than deeper.
I'm wondering if there is a way to raise Z in Mach3 after the 1/16" tool change and zeroing before "Cycle Start".
Bob aka MoHawk & Gigawatt
CNCRP Pro4824, Aspire 9.5, Mach3
Last edited by MoHawk; 02-06-2019 at 04:28 PM.