Heating hotend before Y calibration oozes a bit on the bed before each print
I'm not sure if this is intentional, or a fault in my print. But whenever I start a new print, the hotend/bed gets heated up first, then the printer performs quick Y calibration, and then it starts printing.
The problem is that while the hotend is heated up, a small portion of the filament oozes from the nozzle. This means that the Y calibration sometimes leaves a tiny small drop on the heatbed. Sometimes the little drop doesn't completely detach and there's a very thin string to the next drop.
Why isn't the Y calibration done before heating up the nozzle/bed? That way the calibration would be done with a cold nozzle, avoiding all the possible drippings.
Re: Heating hotend before Y calibration oozes a bit on the bed before each print
Same bothers me too. Theoretically, it should be possible to resolve this by reordering the G-code snippets in the Slic3r printer settings.
I'm not entirely sure though whether heating up the hotend affects Z calibration.
Re: Heating hotend before Y calibration oozes a bit on the bed before each print
Why isn't the Y calibration done before heating up the nozzle/bed? That way the calibration would be done with a cold nozzle...
The Z-calibration would most probably fail with hard residue of filament at the nozzle from the print before.
As a S3D user you could use my profile provided here https://shop.prusa3d.com/forum/original-prusa-i3-mk2-f23/simplify3d-print-settings-august-30-2016--t938-s300.html#p57617
or at least extract the commands from start and end code using the windows editor.
At the end of the print my tool lifts to 10cm for easy accessability for cleaning the nozzle.
Similar happens after bed levelling, it lifts some 6 cm for 3 secons for nozzle and bed cleaning.
Those tiny drops for me have never been a problem at all, at print start I always have a kitchen paper and a small scraper at hand.
Re: Heating hotend before Y calibration oozes a bit on the bed before each print
The lulzBot has a brush that the extruder rubs over before starting tbe print... .
Maybe we need something similar...
It may be memory. But...
It sems to me, that the new extruders ooze more than the old extruders used to.
I have had a mk1 and mk2 with the single drive wheel.. which seemed to dribble less than the mk2 mmu and the mk3
Mk2mmu is bowden with bondtech drive
Mk3 is direct with bondtech...
But i cant imagine any way these differences could influence dribble potential. Directly.
Regards Joan
I try to make safe suggestions,You should understand the context and ensure you are happy that they are safe before attempting to apply my suggestions, what you do, is YOUR responsibility. Location Halifax UK