@tkln I guess, that's not doable right now, but you could try sensorless homing for one of the motors on each tower.

@dog said in Flsun Q5 delta printer, poor dimensional accuracy:

Decided to go with altering the rod lengths, because that seemed to work and I kinda understood how it affects the print when it comes to dimensions. (measured length / desired length * rod length = new rod length ish) basically if the print is too small, shorten the rod, if too big, lengthen it.

I've used a piece of carbon paper over a piece of paper and did a heated nozzle tap (takes less force to mark) to do basically the same thing. It can speed up the process without doing a full print and having to account for anything other than just movement simply measuring from the outside of one dot to the inside of the other.

@breed No need for a heated bed I am printing ceramics

@dc42 I checked the belts and they all seem tight. My joints are these plastic ball cup arms and seem to have no binding to them when moved. I think it might be my carriages or the motors. I emailed seemecnc to see if they had any suggestions.

I’m at my wits end with this. I have tried to run the mesh with the hotend off and on. Tried adjusting the delta radius and arm length but I keep seeing these ridges caused by backlash somewhere. I just can’t quite figure out where

Sure, if using the wrong rod length gives you a flat bed height map and good linearity, go with it. It's probably helping to compensate for a geometrical error elsewhere in your printer.