Geeetech

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first of all，i‘m sorry. we change the z axis motoer‘s stepper driver mapping。
you should change the pin’s setting in “pin.h” file
#define DIGIPOT_CHANNELS {4，5，3，2，1} // Ｘ　Ｙ　Ｚ　ＥＯ　Ｅ１

you don't need to clean the hot end each 1-2printings,the problem isthat the choke is not tightened

The upper screw‘s function is choke，the other one is Fixed Laying head

our board‘s bootloard support windows os 。
here is arduino IDE‘s link：http://www.geeetech.com/wiki/images/0/0 ... -1.0.1.zip
here is firmware’s link ：http://www.geeetech.com/wiki/images/9/9 ... rinter.zip
here is Printrun ’Introduction and how to install：http://reprap.org/wiki/Printrun

sorry to hear that,i suggest you can conect with our Sales staff

1.heating the hotend
2.Release the screws in your hotend 3.Unscrew your hotend and clean up your abs（keep heating）
4.Tighten the hotend
5.Tighten the Release the screws
now you can enjoy printing

1.heating the hotend
2.Loosen the screws 3.then clean up your material
4.Tighten the hotend（be careful ）
5.Tighten the screws，the job is done，then you can enjoy your printing