More testing and toolhead connector

We continue with the printer testing in rastering mode.

Every time we obtain better results.

We also designed a bus connector case.

We are using a 15 wire cable and a DB15 connector for carry all the signal and power lines that any tool might need. The idea is that every toolhead will use that DB15 connector with a standard pinout. In this way,  It will be easy toolhead substitution.