Measuring arm

thingiverse

The Seca model 220 is a vertical ruler used to measure patients' height in clinics like the nonprofit where I work. The old models at my clinic have a weak point on the folding arm, which tends to break over time due to wear and tear. To solve this problem, I designed a new arm in Sketchup and printed it using a 3D printer. Since the printed piece was larger than my printer's build area, I had to print it in two parts that needed gluing together with an ABS/Acetone slurry. The design is intended to benefit other low-budget nonprofits as well. To use the replacement arm, print it in white ABS using a 240°C hot end temperature and a 110°C bed temperature. Set the layer thickness at 0.2mm, with three perimeters and 40% infill, without support. Glue the two parts together using an ABS/acetone slurry, applying it to the bevels facing each other and letting them set overnight. You may need to file down the holes in the ears to fit them onto the nubs properly. For clinics in hot environments, I recommend using ABS instead of PLA, as PLA can warp in high temperatures.