I think they misuse the term 'repeatability'. Their demo shows it moving back and forth 50 microns, with minimal backlash (which is cool). But repeatability mea

I think they misuse the term 'repeatability'. Their demo shows it moving back and forth 50 microns, with minimal backlash (which is cool). But repeatability means you should be able to send it to the same coordinates and get the same position ± 50 μm every time. Anything made out of plastic will have far more thermal variation than that. Even in a controlled environment, the motors heat up. There's an official standard for measuring it: ISO 9283.