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To much soldering for me so i decided to make a much more simple electronic.
Therefore i use a CNCshield V4 and made some changes:

  1. You have to remove the jumpers for the stepper drivers, cause the shield sets them to ground instead of 5VDC
  2. solder the pins together and make a bridge to VDD on the stepper driver
  3. put a 4,7 micro condensator between GND and RST
  4. the servo plug has to be splitted to get the "input" alone. 5VDC and GND can stay together

Now you can use the shield for the eggbot.

Software changes:
eggduino.ino
rotational stepper Step goes pin 5, direction goes pin 2 and enable goes to 8
Pen stepper Step goes pin 6, direction goes pin 3 and enable goes to 8
Servo Pin goes to pin 12
microsteps i gues i put to 8 ... not 100% sure. have to look later ;)

eggbot_conf.py
changed the Scale to "1"

ebbserial.py
i put my COM port there cause got problems in auto searching... so i put there "COM4"

Hope this helps someone... much more easy