Issue after nozzle change
Posted Nov 10, 2019, 5:57 PM UTC
724
You could also have a leak at the nozzle. After a nozzle change, if the nozzle and the heatbreak do not meet snugly inside the heatblock, material can ooze out, burn, and drop down on your print.
3
This. I've had exactly this problem before: globs of plastic dripping onto the work from around the nozzle or above the heater block due to a loose nozzle.
The problem is that if you tighten the nozzle when the heater block is cold, when you heat up the block it expands, so the connection gets looser. Make sure the heat break is far enough in that the nozzle tightens up against the heat break rather than bottoming out against the heater block, and tighten it while it's hot.
2
Best way to check? Will I see plastic on the heat break?
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If you look where the nozzle meets the heatblock, you may see material there. You may need to remove the nozzle and if there is material in the threads you know you have a leak.
3
Joy. It was painful enough putting the thing in.
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Couldn't see anything, but I tightened the heat break just in case and Im doing z layer calibration now
1
You could also try tightening the nozzle a bit more while it is hot, to ensure a snug fit. Good luck.
2
Can anyone point me in the right direction of where I have gone wrong here? Is my z too low, so the nozzle heat has impacted the extruded layers, or have I broken it in some other way?
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Interestingly I have a solid bottom layer, with the text just visible through it
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Update: So I tightened everything up and dan z level calibration. After dialing it back a bit I got a good layer and the benchy came out with only a minor error near the top of one of the arches. I'm chalking this up as a win for tonight. Thank you to everyone who gave advice.
1
What material nozzle? If it has lower conductivity you'll have to increase the temp a little bit.
Its the e3d nozzle X
Edit, which seems to be some sort of hardened steel
Yup. Pump up the heat by 5-10° and see how it does.
So that would be prusament PETG at 260.
Haven't used prusament but wow that's hotter than I expected. I get decent results with my lower quality steel nozzle and matterhackers petg at 240 ish.