How good is this?

[Griff (Well crap, my hypometric precursor device is blown…)]

Might want to try this:

Tutorial: Calibrating axis belt stretch on SO3 with a caliper

Seems like a fair number of people have trouble with belt calibration, so here’s another shot at a tutorial using a different method. You need a digital caliper (at least 6"), some clamps, and a block. You don’t need to cut any material like you would with a square-cut type test. Here’s a handy spreadsheet for doing the calculations: GRBL-Calibration.zip (8.2 KB) Getting Set Up: (1) PUT A FRESH BATTERY IN YOUR CALIPER! If you paid less than $100 for your caliper, it almost surely loses c…

I do this monthly, also any time I replace a v-wheel. Sooooo easy once you’ve done it a few times.