A common question from new users is "How do I reduce oozing from the hot end?". This article addresses two separate, but related issues.
- Melted filament "gobbing" or "oozing" out of the nozzle before a print begins, often times causing problems with the initial layers.
- Stringy traces of melted filament between certain points on a finished print, as a result of "oozing" during the print.
Issue 1: Melted filament dripping or "oozing" from the hot end as it is coming to temp before a print is normal. To reduce the effects of the ooze on your first couple of layers, try increasing the "line count" in Cura. If you went through the Cura Machine/Configuration Wizard, your line count is probably set at 2. Increasing this setting really helps to "prime the pump" and clear the excess melted filament off of the tip of the nozzle.
You can increase your line count in Cura by going to Expert/Open expert settings/Expert config/Skirt/Line count. Try increasing the count from 2 to 4. Click "OK" to save the setting.
Issue 2: Perhaps you are not having trouble with your first couple of layers, but rather the finished print. If you are tired of pulling little strings and strands of cooled filament off of your castles, columns, and towers, try the steps below. For a really informative article from Matterhackers on retraction and reducing ooze on your prints, click here.
- Increase your non-print Travel speed: Cura/Advanced/Travel speed (mm/s). *Note: Increasing your speed too much can create a whole new bunch of problems. Monitor and adjust in small increments (increase ~10mm/s at a time).
- Increase your Retraction Distance: Cura/Advanced/Retraction/Distance. DO NOT set this value higher than 5mm. It will cause clogging. *Note: "Retraction Distance" is not the same as "Retraction/Minimum travel" in the expert settings menu. Be sure that you are adjusting the Retraction Distance.
Increase your print speed first and then your retraction distance until you have found an optimal setting for your printer.