Ok folks, printing head construction is bad. Why? Is not simple to maintain. If everything is ok no pain. But if you have some problems... you need to struggle. First, one electric connector for all cables (main connector), second high-temperature resistant also. My connectors are little melted... after printing ABS. Not easy to remove. Second extruder motor... if you get jam is not easy to remove filament debris. Next filament sensor. Should be simpler also and without closed spaces...
Rear part and cables are easy to puncture by mounting bolts. It should be reconstructed.
I'm working in automotive industry above 20 years. I built many racing machines in past. Simplicity is an answer.
Please post your suggestions for hardware features
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