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Editing Step 18 —

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Plug the printer in to power and connect the USB cable to a computer running the Arduino IDE. (supported lib versions: 1.0.6 | 1.6.12 | 1.6.13 | 1.6.5-r5 | 1.6.9 | 1.8.1 | 1.8.2 [lib\version.txt])

Open the Marlin firmware and navigate to the Configuration.h file.

On line 125, change the 0 to a 5. The line should read:

#define TEMP_SENSOR_0 5

To print materials that require temperatures higher than 275° C (like polycarbonate), you'll also need to edit line 150:

#define HEATER_0_MAXTEMP 300

Compile/Verify Marlin. Install the Teensy 2.0++ Libraries if required (AT90USB 1286).

Upload the new firmware to the Printrbot Simple Metal.

Your contributions are licensed under the open source Creative Commons license.