Hey folks,
I came up with a formula that provides a more accurate result than the one used in the “XY Skew Calculator221”.
Here’s the formula:
-ASC((AC² - BD²) / (4 × AD × AB))
The result of this formula should be inserted after the M1005 I command.
The key difference is that Calculator221 uses an average value for AB, while my method requires measuring AB directly — which increases accuracy. So in total, you need to measure four values: both diagonals (AC and BD) and both sides (AD and AB).
You can find the Google Sheet here:
And here’s the exact formula you can plug into the sheet:
=-ASC((D15^2 - D16^2) / (4 * D17 * {YOUR AB}))
If anyone knows how to contact the original author of Calculator221, I’d appreciate a tip — I haven’t been able to find any info.
Cheers!