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z axis moves twice as far

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z axis moves twice as far as its commanded in manual jog. and when printing does not seem to move at all .

recently replaced stepper driver . not sure what else need to alter

printer is teacup . but runs with reprap 5d driver . and marlin v1.0 firmwware

cheers mark


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he does not have a UM. Anyway there are jumpers somewhere that specify double stepping or something. You could mess with that and fix it in hardware. Or you can fix it in software. For example build Marlin here:


And specify the steps/mm.

Or if you already have marlin installed you can update this parameter only (steps/mm for z axis) using only pronterface and gcodes. When you first connect with pronterface it will tell you the current steps/mm for each axis. You can change this value and save (you must save or you will lose the next time you power cycle).

For example M500 does the save.

gcodes explained:



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