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kino edited this page Jan 20, 2017 · 1 revision

Z axis

The Z axis is driven by a Nema17 motor with a 3mm pitch leadscrew on a 2:1 reduction gear. The Z Axis has a step resolution of 0.00046875 mm (0,47 micrometers).

Suggested Layer Heights

Helps you to select layer height in a way, that Z axis moves only by full step increments. Z axis isn't usually enabled during inactivity. If the axis is disabled during micro-step, axis jumps to the closest full step and intorduce error. This effect is occuring to some extent even while leaving the Z axis motors enabled. This is most usefull to machines with imperial leadscrews but also for unusual layer heights with metric leadscrews.

From Prusaprinters.org/calculator

Suggested layer heights for optimal quality ,using Microstepping, are:

Typical Suggested
0.1 mm (100microns) 0.1003 mm or 0.09984 mm
0.15 mm (150 microns) 0.1505 mm
0.20 mm (0.2 microns) 0.2002 mm or 0.2006 mm

missing old wiki zsteps.jpg image

Layer height Error over 10cm Number of steps Step length
0.0075 0mm 1 0.0075mm
0.015 0mm 2 0.0075mm
0.0225 0mm 3 0.0075mm
0.03 0mm 4 0.0075mm
0.0375 0mm 5 0.0075mm
0.045 0mm 6 0.0075mm
0.0525 0mm 7 0.0075mm
0.06 0mm 8 0.0075mm
0.0675 0mm 9 0.0075mm
0.075 0mm 10 0.0075mm
0.0825 0mm 11 0.0075mm
0.09 0mm 12 0.0075mm
0.0975 0mm 13 0.0075mm
0.105 0mm 14 0.0075mm
0.1125 0mm 15 0.0075mm
0.12 0mm 16 0.0075mm
0.1275 0mm 17 0.0075mm
0.135 0mm 18 0.0075mm
0.1425 0mm 19 0.0075mm
0.15 0mm 20 0.0075mm
0.1575 0mm 21 0.0075mm
0.165 0mm 22 0.0075mm
0.1725 0mm 23 0.0075mm
0.18 0mm 24 0.0075mm
0.1875 0mm 25 0.0075mm
0.195 0mm 26 0.0075mm
0.2025 0mm 27 0.0075mm
0.21 0mm 28 0.0075mm
0.2175 0mm 29 0.0075mm
0.225 0mm 30 0.0075mm
0.2325 0mm 31 0.0075mm
0.24 0mm 32 0.0075mm
0.2475 0mm 33 0.0075mm
0.255 0mm 34 0.0075mm
0.2625 0mm 35 0.0075mm
0.27 0mm 36 0.0075mm
0.2775 0mm 37 0.0075mm
0.285 0mm 38 0.0075mm
0.2925 0mm 39 0.0075mm
0.3 0mm 40 0.0075mm
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