I have a problem with stringing. The Marvin model comes out almost perfect, but there’s a maze of strings between the two leg perimeters until they join. Printing two Marvins is a disaster, one has an untidy “beard” on the left side, the other on the right.

My material is PLA, not famous for this problem.

Printing temp is 190C, not much of a margin on the cold side.

Bed temp? Heating is off from layer 3 on.

Retraction? 3mm at 1800, more than recommended safely.

Print speed is pretty low, 30 seconds a layer, otherwise overhangs warp upward creating a mess.

What else can I do to reduce stringing?

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You need to continue to work on your retraction settings, including how much is retracted, how fast you can retract, etc. You can also try printing the model from outside in or inside out.

You have to get to the point that when your printer is finished with a layer, there is enough reverse pressure to suck that filament up into the extruder and hold it there.

Printer, slicer, and photo would be helpful here…

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The printer is he3d i3 (pretty much the same as Tevo Tarantula, a variant of Prusa i3). I’m using Simplify3d for its flexibility regarding layer ranges.

Most of my confusion is about how much retraction is safe. There are warnings of nozzle clogging with any settings above 1mm, especially with low temperature prints, and that looks like my case. I have a suspicion this number is right for direct drive extruders, and bowdens are different.

What are the settings to play with to get retraction timing/amount right? Just the retraction amount and speed? Wiping the nozzle is an option in Simplify3d, but I don’t see it in action. Free movement speed, does it make sense to try increasing it?