I've run into an interesting problem. The short question is: Is there a way to adjust how far the filament is getting pulled back during a move?

Under a normal print, I'm not having any problem. This particular part has a lot of little "islands" or posts that are around 1mm in size, so from one post to the next, the filaments retracts as it should during a move. I have one color that works perfect fine and is 1.75mm, my other color is bit off so it's 1.68 on average so I adjust slic3r for that difference.

During the print, It's very evident that the filament is stuck in the extruder and it actually takes a lot of effort to manually remove it. My theory is that I'm getting a little molten backflow inside the extruder head and it's cooling and sticking. With the large number of retractions for the little posts, this is compounding the problem since it would keep pulling the heated filament backwards a lot.

Without having to reprogram the firmware, does anyone know if there's a setting where I can reduce the "pull back" amount so I can see if I can solve it with this method. Obviously, changing filament to the correct size is the easy way out! ;-)

I'm using a MakerFarm Pegasus 10", Titan e3d-v6 hot end, Repetier with Slic3r, and 3D solutions PLA filament.

Thanks!