Accuracy: Expectation vs Reality

[ScrumdyBum]

@bar

When we came up with the test pattern it was intended to be a way to give us a single number (well really two numbers) so that we could test if a change was making things better or worse.

The idea was to average the error on each of the long cuts and each of the short cuts to give a score.

@bar

After finishing the calibration process I immediately ran the test pattern and got a score of 0.96-0.71 which is pretty good.

A good thread to follow

What must be adjusted to correct out of round circles

Have run several circle tests, and they are slightly out of round… In the center towards the top, 6" wide x 5 7/8 " high In the center towards the bottom, 6" wide x 5 15/16" high 30" either side the error narrows to 6" wide x 5 31/32" high What measurement errors cause this problem? FWIW, I used the machine to measure top beam length, and the result was 3004.57… used this for the temp sled calibration. When I calibrated using the new sled, I used a steel rule to measure the distance between…

BenchmarkAccuracyTest.xlsx (10.1 KB)