ok, so if i understand this, every time the motor reach the full step position the precision is kinda reset so that you'll never have more than that ±5% of a Full step + whatever the microstepping error might be…

Gezz... took me a while to figure that out wow...

Looks like my delta printed as good as the way it was built... now i feel better...

Microstepping is meant for reducing noise not augment precision. On a Delta, your precision is already off by your inability to accurately measure tower position and angle. If the tower wiggle even just a bit, you'll never be able to print a square so there is no point in buying powerful high precision geared steppers. You need precision in a delta though, because the motor movement does not always translate to the same distance on the bed. Microstepping is then required to at least offset for that. But with a cartesian printer and a 400 step per revolution stepper, its not too hard to get to 0.05mm, i dont see any reason to use microstepping then, especially if it remove precision… i have no idea if a 256 microstepper is precise or not, but i kinda dont want to take my chances.. my delta days are over... i want to leave that nightmare behind me..

sorry to revive an old thread, but i'm considering buying a Duet Ethernet and i'd like to know if its possible to set a Minimum step Increment? I'd like to stay within my steppers Full Step, but while still using 256 microstep… i was lookin into the tmc5130 chip, the datasheet seems to indicate that it could support it, but there is not a single implementation that support more than 1.4A right now(probably more like 1.2A)... And i'm not willing to wait... So, Full steps, at 256 microsteps, can it be done in software?