Today I had to make many prototype printing. This mean design, heat printer, print. Repeat as many times as needed. The nozzle cool down very fast, but not the PTFE. At the end of the Day, it start to leak. The bottom is bigger than before. and I was unable to print because too much ABS go in the PTFE and the printer cannot melt it again.
I had to disassemble the Heater. Doing that, i broke my thermistor :-(
I installed a copper tube on the PTFE to help not blowing anymore. The problem is that copper take all the heat. To help dissipating that heat, I added 2 small heatsink on it. Hope this will help.
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