Laboratory equipment for teaching STEM in schools PART 9 - angle scales

### Laboratory equipment for teaching STEM in schools PART 9 ### sm_pb 08/2019 thing:3793474 I have developed a tripod system for teaching STEM in schools. For more information see: Part 1: thing 3433683 Part 2: thing 3469091 Part 3: thing 3469411 Part 4: thing 3477316 Part 5: thing 3481788 Part 6: thing 3694510 Part 7: thing 3761004 Part 8: thing 3761008 Here are some angle scale discs. 21a, 21b, 21c, 21d, 21e_angle_scale_240mm: The diameter of this discs is 240mm. There are different versions. The hole in the middle has a diameter of 10mm. The version with the 9 holes fits exactly to the square table "09_square_tabel" from Part 3. I recommend printing the scale with the display facing down. Support is not necessary. 22a, 22b, 22c, 22d, 22e_angle_scale_120mm: The diameter of this discs is 120mm. There are again different versions. The hole in the middle has a diameter of 10mm. The version with the 5 holes fits exactly to the round table "08_round_tabel" from Part 3. I recommend printing the scale with the display facing down. Support is not necessary. The print itself is very demanding in this component, since the scale marks only have the width of the nozzle used. It is hardly possible to print an even smaller discs. I recommend to print it all with 80% infill and a layerhigh of 0.2mm