It is a delta. X/Y/Z errors are all tied together. It is enough to perfectly level the bed the old way and also your X/Y dimensions will be correct (or at worst all scaled by the same constant). And you can level the bed without printing anything. But notice you cannot use Johann's matrix based auto-levelling. You must level purely by adjusting endstops, diagonal rod length, and delta radius (or tower positions if you do not have the towers symmetrically placed).
Errors in calibration parameters lead to errors of about the same magnitude in the printed parts. So roughly: if you want about 0.1 mm precision in the printed parts then the calibration parameters must have about 0.1 mm precision too.
Errors in calibration parameters lead to errors of about the same magnitude in the printed parts. So roughly: if you want about 0.1 mm precision in the printed parts then the calibration parameters must have about 0.1 mm precision too.
