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Default microstepping settings and direct extruder


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Posted · Default microstepping settings and direct extruder

Hi,

I am unable to find out what microstepping is used for which axis by default and what settings to use for direct drive 1.75mm extruder (airtripper v3).

My guess is x and y are 1/16 and z is 1/8. No idea what the default for ultimaker extruder is.

Can someone advise please?

Regards,

 

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    Posted · Default microstepping settings and direct extruder

    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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    Posted · Default microstepping settings and direct extruder

    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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    Posted · Default microstepping settings and direct extruder

    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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