If you want to download the firmware for geetech printer, find the one for your printer here:
viewtopic.php?f=10&t=17046
for GT2560 please come to here to install the firmware:
viewtopic.php?f=13&t=17181
1. Download arduino 1.0.1,
download link:
http://www.geeetech.com/wiki/index.php ... Resources

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Unzip the file.

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For sanguinololu, you need to copy the folder named "sanguino" to the folder "hardware" of Arduino IDE.
The "sanguino" folder:
Download this file and unzip it and move it to the folder "hardware".

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2. Connect your printer to computer, open "arduino.exe".(There is no content in arduino when you open it, if not, delete the content)

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3. Here take firmware "I3_Sanguinololu" for example.
for GT2560, you can also come to here to install the firmware:
viewtopic.php?f=13&t=17181
Open folder "I3_Sanguinololu"(
files of Marlin firmware), double click the "XXX.ino" file to open the firmware in the arduino.
If you can't find the .ino file, then select
all the files (59 in all) and drag them into arduino.

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4. Choose correct board type.(Tools>Board>Sanguino W/ATmega1284p 16mhz)
(If you use GT2560, choose "Arduino Mega2560 or MegaADK")

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5. Choose correct serial port.(Tools>Serial Port>...(Usually only one choice for Windows)).

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6. Click the icon "→" to upload the firmware to your mainboard.

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waiting for compling and uploading.

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7. When displaying "Done uploading", you have successfully uploaded the firmware to your mainboard.

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