Accuracy, Repeatability
I just finished 4 identical parts on my IH CNC and thought I would share the measurements I took on these parts. To me, it's quite impressive.
They are 1/2" 6061T6, designed to be 4.25" long and .640 wide. The following are the measurements of the width on each end and the length of the part.
Part1
.64005
.64085
4.2505
Part2
.64060
.64065
4.2510
Part3
.63990
.63970
4.2510
Part4
.64175
.64150
4.2510
Part4 seemed to be viabrating on the final cut so that may explain why this one was off more than the others. Ignoring Part4, the average deviation from design on width is +.0004, and on length is +.0083. Close enough for government work.
Noncarborundum Illigitimus