Hello ,
you need to change the motor direction of the X axis. please refer to these.
1. download the firmware here for your printer model. www.geeetech.com/forum/download/file.php?id=2819
2. change the motor direction according to this instruction: http://www.geeetech.com/forum/viewtopic.php?f=17&t=17037-
2. upload the firmware for GT2560 control board http://www.geeetech.com/forum/viewtopic.php?f=20&t=17181-
as to the use of Repetier, please refer to the user manual of this printer, you can download it at the document section of this page.
If you need further help, please feel free to contact us.
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