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too much extrusion - what to modify in configuration.h ? (2 replies)

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Sorry for this simple question..
Have assembled a very nice coreXY printer
Had to modify the home- and max- parameters to get the movements right.

First print was okay but the extruder stepper seems to push to much filament.
It is making this clicking noise when the gear-wheel slips..
When i slow down the printing, the clicking gets less.

Don't know what nozzle size is currently mounted. Reduced the size to 0.1mm in Repetier Host. No change.

Should i play with the "89" in
#define DEFAULT_AXIS_STEPS_PER_UNIT   {XYZ_STEPS, XYZ_STEPS, Z_STEPS, 89} //XYZ_STEPS       E 84-95

What other lines might be worth a try ? I am new to Marlin :-/

ideas welcome.
I am tired now and have to shut down. Am dreaming that you light my day when i come back tomorrow :-)

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