Sash

Hi! I'm an owner of an Ultimaker 2, i installed the 2+ upgrade-kit (stepper, feeder, Olson-Block,...) and at first it works pretty well. Now i want to print a big plate with a high of 5mm, but that's a big problem for my printer! At this time I use a 0,4mm nozzle, Olson-Block (i have tested 220°C,225°C,230°C,235°C,240°C,...) and Innofil-Filament. The Printer beginns to print...everything looks perfect. 5 minutes later the printer has extrusion-problems. - Remember, bevore this printjob, everything (little printjobs,...) works very good! I changed the nozzle, the bowden-tube, and the heatbreak is brand new, too. Nothing of that solved the problems! I tested a lot of thinks, but the results are realy bad...and I was spend to much of time in solve these problems! Now I have no idea what is wrong. THX for help!