Where on the workspace you are cutting will also affect the errors you see. In particular, the errors tend to be worse at the top center and lower corners. The following links may or may not be useful:
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…
Definition and the Calibration Model
It’s important to make sure you use the correct language when describing your issues and the definitions of accuracy and precision are often confused.
Accuracy is how close a measured value is to a desired value. You want to cut a 12-inch square and you get an 11-inch square, you accuracy is poor.
Precision is how close multiple measured values are. You want to cut a 12-inch square and do so in 5 passes around the plywood and each cut perfectly overlaps t…
I was explaining the issues we are fighting with for accuracy to someone and started enumerating all the potential sources of error. I thought it would be good to go through them all and list how they are (or are not) being addressed as of the beginning of Nov 2018.
This assumes that the chains, sprockets, chain slack are all kept in the same plane so that there is no error from the chain attempting to skip or the efforts to prevent it from skipping.
This is assuming triangular kinematics (usi…
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