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# Configuration for Kossel k800 XL
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This example configuration is for a Kossel XL with a printable bed diameter of 280mm and a height of 380mm. It also has the auto bed leveling probe (with an endstop switch) and the heated bed activated.
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## Configuration
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You might need (or want) to edit at least the following settings in `Configuration.h`:
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* `MANUAL_Z_HOME_POS` - The available height of your printing space. Auto Bed Leveling makes it less important to have the exact value.
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* `DELTA_PRINTABLE_RADIUS` - The printable radius is how far from the center the nozzle can reach.
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* `DEFAULT_AXIS_STEPS_PER_UNIT` - Steps-per-millimeter for the delta steppers, and for the extruder [to optimize the amount of filament flow](http://zennmaster.com/makingstuff/reprap-101-calibrating-your-extruder-part-1-e-steps).
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### Fine tuning
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* Increase `DELTA_RADIUS` if the model comes out convex (with a bulge in the middle)
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* Increase `DELTA_DIAGONAL_ROD` if the model comes out larger than expected
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### [http://reprap.org/wiki/PID_Tuning](PID Tuning)
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* `DEFAULT_Kp` - The proportional term
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* `DEFAULT_Ki` - The integral term
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* `DEFAULT_Kd` - The derivative term
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### PSU Options
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* The power supply is configured to 2 (to use a relay to switch 12V on and off)
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* It is configured to be off by default
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