X/Y calibration.

[rebekah_harper 60]

Does the X/Y calibration procedure on the UM3 recognise the cores fitted and adjust accordingly or do they have to be both 0.4mm ones. 
 

it wouldn’t make sense if it didn’t but I know from a while ago it didn’t adjust for smaller nozzle size.

[Smithy 1,141]

If you have different cores you have to calibrate each combination. From the serial or GUID number of the core, the printer knows if you have a new uncalibrated core or not. I am not sure if you have to recalibrate the cores if you swap the positions, but I guess yes you have to do it.

[CarloK 202]

The XY calibration adapts for the different core diameters by adjusting the amount of material extruded and adjusts the brim pattern too.

 

@rebekah_harper When you say there are problems, can you elaborate?

Looking at the code it seems to always print at 0.3mm which for a 0.25 nozzle better would be lowered to 0.2mm.

[rebekah_harper 60]

the xy cal doesnt adjust to current setup.

with 0.25 nozzle i get the extruder skipping and if i have anything other than pla i have to adjust temp as well as flow rate during the process.

 

how can i lower the nozzle diameter for an internal process on the machine

[CarloK 202]

During the printing of the XY-calibration pattern you can adjust the flow and temperature like with any other print, but our goal is that for all Ultimaker approved materials this should be working out of the box.

 

The 0.25 nozzle is not as well tested as the 0.4 nozzle and I will test again to see if I can find some grinding related problems.

[robinmdh 99]

Discussed with @CarloK

While the XY calibration does re-calibrate for the smaller nozzle the print still happens with a static layer height, maybe the max mm/s that is pushed trough the nozzle is exceeded causing grinding.

 

I could generate the gcode for the XY calibration with a smaller layer height, would you be willing to test that?