I’m back to making plastic (calibrations are sticking), and plan on repurposing the printer parts for an ingentis build…but before I do that, I’ve got to get it dialed in enough to print the parts!
So my 40mm test cube is actually pretty close-ish, the average is about 40.75 in one direction and 39.7 in the other…its a little Wavy, and the Z-height is waaay off - 32.56 INCLUDING the raft.
Do I just scale Z in the slicer?
Set up your firmware with the proper steps/mm values instead - use http://calculator.josefprusa.cz/ to figure them out.
I thought I did! First run had the e-steps at around 53.1, one iteration later I’m using about 45.something, but I’m not seeing anything in the Marlin/Delta firmware that lets you actually calibrate vertically. Unless it’s a factor of extrusion?
Configuration.h, line 440 (in Marlin):
#define DEFAULT_AXIS_STEPS_PER_UNIT {78.7402, 78.7402, 200.08/3, 7601.1}
is the default line, which defines X, Y, Z and E steps/mm. Use the values from Prusa’s calculator along with the your empirically calibrated E steps/mm and you should see better results instantly.
But its a delta…I thought those correlated to absolute movements of the servos? I typoed one once and it had the z servo pushing 1/3 as much as X and Y
Ah, ok. I don’t know how deltas work in this regard. Though @Richard_Horne and @ThantiK do.
Believe me, it’s why I’m considering an Ingentis next.
@Mike_Miller Move your Z 40mm (all three carriages move as one), then measure on the pillar how much did the carriage actually move. It should be exactly 40mm as well. Then change the DEFAULT_STEPS_PER_UNIT until you get that 40mm. Then your X/Y scale will probably be way off, to fix that you’ll have to change DELTA_DIAGONAL_ROD. (look here - http://minow.blogspot.ca/)
thaaat makes sense. And pisses me off a little. 
The phrase ‘then go back and recalibrate everything else’ sure does seem to occur a lot.
Recalibrate is 3D printing’s middle name.
@Shachar_Weis thanks for the clue, printer is very close to dialed in after your advice.
The good old cube, I was back on that too in the early hours with some new PLA. I always check to see how you’re prints are getting on. Don’t give up @Mike_Miller
I’m not giving up, I’m just realizing the limitations of what I currently have, and the gap between it and where I want to be.
