Can someone provide me with some guidance on getting the extruder calibrated for a 0.15mm nozzle.
I was able to dial it in on a 0.35mm nozzle use the OHAI Instructions. http://ohai-kit.alephobjects.com/project/extruder_calibration/
I started out extruding 100mm at 100mm/min with the 0.15mm nozzle. With the 0.35 nozzle I was calibrated with an Estep of 863, so I backed it down to 750 and the hobbed bolt just ate the filament. I assumed that I was trying to push too much through the small nozzle so I dropped it way down to 300 on the Estep and was able to get it to extrude with out the bolt chewing up the filament.
So with the temp at 230C 100mm /100mm/min I started extruding, trying to get to 100mm
Estep 300 Extruded 32mm
Estep 325 Extruded 38mm
Estep 375 Extruded 51mm
Estep 425 Extruded 60mm
Estep 480 Extruded 72mm
Estep 525 Extruded 75mm
Estep 550 Extruded 68mm ( I think here I’m taking to large of a step and the nozzle is backing up)
Estep 600 Extruded Bolt ate the filament again.
So seeing that I was moving in the right direction but couldn’t get a large enough Estep to give me the 100mm extrusion without the hobbed bolt eating the filament I decided to only extrude 50mm at 50mm/min
Estep 600 Extruded 30mm
Estep 650 Extruded 70+mm (It printed past my mark)
Estep 625 Extruded 32mm (Ran it twice 32mm both times)
Estep 640 Extruded 34mm
Estep 660 Extruded 37mm
Estep 700 Extruded 37mm
Estep 750 Extruded 51mm (Over shot by 1mm)
Estep 745 Extruded 38mm
Estep 749 Extruded 40mm
Estep 755 Extruded 42mm
Estep 775 Extruded 49mm
Estep 778 Extruded 38mm??? Reextruded 40mm (Magically Lost 9mm of extrusion)
Estep 780 Extruded 41mm
Estep 800 Extruded 55mm
Estep 790 Extruded 34mm?? Lost 20mm of extrusion, Reextruded 70mm+ extruded past my mark, 3rd time 41mm
Estep 775 Extruded 25mm Reextrude 40mm Reextrude 40mm
So needless to say after 2.5hr of trying to get it to behave and zero in the extruder I gave up. Does anyone currently use a 0.15mm nozzle if so what is your Estep value?