Section 4.7 Wiring the Extruder

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• Connect the extruder motor with the remaining motor cables of 1 meter long.

• Label all the wires in such a way that you will know which connector belongs to which wire.

  • Note: the left extruder is numbered "0", the right extruder is numbered "1".

  • Label all four heater cables as HE0 or HE1

  • Label the motor cables as E0 and E1

  • Label the termistor cables as T0 and T1

  • Label the Active fan as A-Fan

  • Label the Extruder cooler fans as E-Fan

• Lead all the wires through the thick braided sleeve.

• Fix the braided sleeve onto the extruder unit with a zip tie.

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• Lead the cable into the RUMBA case through the side inlet.

• Connect the wires accordingly to the picture above. Detailed pictures will follow below.

• Connect the heaters to the HE0 and HE1.

  • Polarity is not important.

• Connect the thermistors to T0 and T1.

  • Polarity is not important

• Connect the extruder motors to E0 and E1.

  • Note that the connectors are in a mirrored ordered.

  • In case the brand of the extruder motor is "Moons" note that the wire order is black red green blue or red yellow grey green.

• Connect the Active Fan to the Fan 0

  • Note that the red wire is on the positive and the negative on the black

• Connect the Extruder Fan(s) to the 12V output.

  • If you are building a dual extruder you will probably see a double wire for each pin.

  • Connect the red wire to the positive and the black to negative.

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• Put the extruder unit on a heat resistant surface.

• Turn on the printer.

• In the display menu push the button once and turn it to navigate to Control.

• Continue to Temperature and Nozzle 0. And set the temperature to 150 degrees Celsius. Push the button once more to confirm.

• The nozzle heats up now (be careful).

  • Note the first time the extruder heats up it produces some burning smells. This is nothing to worry about and also something that will soon go away.

• Wait until the temperature is stable for some minutes. Then increase the temperature to 280°C.

• Wait until the temperature is reached and carefully fix the nozzle with a 17mm and 8mm wrench as shown above.

• Let it cool down. Now test again if the heater still works (sometimes they break) by putting the temperature to 150°C (the nozzle should be colder than 150°C of course). If it heats up than everything is fine. If not, you’ll have to replace the heat cartridge.

• Do the same for the right hand extruder.

• remember the teflon inliner from the section 3.4: Assembling the Extruder? Once you are done unscrew the cooler body from the heatbreak and insert the teflon inliner.

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1x Active Cooling Duct

• Slide the Active Cooling duct into the air outlet of the radial fan.

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2x M3x40 screw

• Put the extruder unit onto the X-Carriage.

• Make sure that the cavity on the back of the cooling duct stands on the notch of the X-Carriage

• Fix the unit with the two screws

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	1x Cable Holder
	1x Cable Holder Cover

• Put the braided sleeve into the opening of the Cable Holder.

  • Take care that the length is enough so the extruder can reach easily to the far right.

• Put the cable holder onto the X-Motor

• Join the wires of the X into the braided sleeve.

• If the wires are entangled too much, reconnect them in such a way that all cables are neatly organized.

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