This is also the sort of problem I see when I set the extrusion multiplier too low in Slic3r.by Justin Andrews - General
Could it be your USB messing up the connection? Try using a different computer. From your description it seems all that has changed is your computer, and the weak link there is the USB connection.by Justin Andrews - General
Step ONE: Start here. or here Those two sites were all I needed to build my printrbot clone. Once your up and running, then I can recommend Faberdashery for filiament if you are in the UK. (Not the cheapest, but good) Oh, and don't forget to say "printerus assembulous" when you wave your wand... >:-)by Justin Andrews - General
Traumflug Wrote: ------------------------------------------------------- > Ahem. There's the G4 command, which pauses > execution. Not very popular in the RepRap > community, but inserted after each layer, it > should solve cooling problems of small parts. With > or without fan. A G4 P20000 pauses for 20 seconds. As an aside thought, if you are pausing for more than a couple of sby Justin Andrews - General Mendel Topics
I'd imagine that over a certain size you'd also start having to address warping issues as well. Which might require engineering solutions not commonly seen on repraps (such as heated build chambers)by Justin Andrews - General
Try adding a fan across the cooling fins of the J-Head? I did this and it really improved the ooze comming out of the extruder. Mind you that was PLA, which is quite different from ABS I guess.by Justin Andrews - Printing