I do understand how those settings work, but why didnt i see this problem in the earlier version ?
Also do you have any PLA printing advice ? I have to turn off combing because nozzle wipes too much causing filament to get pulled out so when it starts to print, nozzle is empty and does not print until later.
I tried using retraction, but it makes the filament to bend before extrusion and stops feeding so i have it off as well as combing but then i have lots of mess and strings.
I tried 190-220 temps, speed 40. Could my PLA be bad ? Could it be the type of PLA i have ? Personally i have no clue what type it is. I bought it on AMAZON at http://www.amazon.com/gp/browse.html?ie=UTF8&marketplaceID=ATVPDKIKX0DER&me=A34DFZFYEZZ8FF
Retraction is controlled by three settings in the Expert Settings dialog.
The minimum travel is the largest move that WON'T have retraction. If you set that to zero, it will retract on every move. If you set it to 5mm, it will retract whenever it has to move more than 5mm. Set it to whatever amount makes sense, so that moves between parts of your print get retractions, and moves within parts, don't.
The minimal extrusion setting is the minimum amount of filament that has to be extruded (measured in mm of raw filament) after one retraction, before another will happen. Set this to a small, but non-zero, amount to avoid having the filament get retracted on the same spot over and over.
Finally, the 'enable combing' checkbox - when that it set, Cura will try to make all moves inside the print, and not cross boundaries - and when it does, it won't retract. With that off, then it takes the shortest route to move, and retracts according to the other two settings.
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