Servo-driven Z-axis for pen

thingiverse

Lifts swiftly upwards, directly perpendicular to the surface. In contrast, many other servo-driven pen axes rotate when lifting the pen. Provides approximately 10 mm of travel. Used in the pen plotter that earned the Oslo Innovation Award in 2016. Successfully printed a diploma live on stage during the award ceremony. Required components: Microservo. The SG92R or equivalent with the same size head is recommended, available at https://www.adafruit.com/product/169. Low-friction tape. UHMW PE or Teflon are ideal options. Kapton can be used as a substitute. Two M3x30 screws and two M3 hex nuts for attaching the pen to the slider. Two M3x30 screws for adjusting tension on the slider. Accommodates pens with diameters ranging from 8-15 mm. This design can be adapted by using a 3D-printed pen body that includes a spring for smooth pressure, such as the one available at http://www.thingiverse.com/thing:1836797.