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Default microstepping settings and direct extruder

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Yes, it's 16 for x, y and e. 8 for z. One full revolution of the motors is 200 (full) steps.

The default number of steps per mm is 78.74 for X/Y; 1600/3 for z; 832 for e. The first 3 are defined by the mechanical properties of the pulleys and lead screw. The last on has room for a little variability depending on the pressure of the spring, and the softness of the filament, which affects the effective diameter of the drive bolt.


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Well, based on the diameters of the drive parts, and the gearing used, you should be able to arrive at a theoretical value. 3200 (micro steps) will rotate the motor once, so figure out roughly how far one rotation will drive the filament, in mm, and divide that into 3200 to get the steps-per-e value.

In addition, or instead, you can simply send a gcode to feed 100mm of filament (when disconnected from the print head), and measure how far the filament actually moves, and then adjust the current steps-per-e value accordingly.


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or instead, you can simply send a gcode to feed 100mm of filament


That's what I did a while back. I put the filament only a little into the bowden tube and then marked it >100mm below the extruder and measured it exactly, then ran it for 100mm and measured where the mark had moved up to


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