@@ -19,52 +19,8 @@ What you need
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2020Assembly
2121--------
22- (see illustrations at http://wiki.fablab-nuernberg.de/w/Ding:Plotclock#Zusammenbau )
2322
24- # Use the plotclock PDF file for lasercutting acrylic 3mm or
25- use the plotclock SKP file for alternative 3D-Parts.
26-
27- The blackend area in the PDF are to be engraved, not cut. This improves grip
28- for the servo hubs.
29-
30- # swee.stl (a wiper) for 3D printing the cap of the pen with the eraser.
31- This can also be constructed from cylindrical parts.
32-
33- # Some holes are 2.5mm only, cut M3 threads there.
34-
35- # Assemble the servo arms. Gently adjust the counternuts so that the joints
36- under the screw heads just have enough play for smooth movement.
37-
38- # Load the Arduino software (check the comments).
39- http://playground.arduino.cc/Code/time is used as a clock library.
40-
41- # Glue a piece of cloth to the wiper with doublesided tape.
42-
43- # Connect the servo signal lines to pins 2, 3, and 4 of the Arduino board.
44- Employ a small daughterboard for powering the servos, if needed.
45-
46- # Test drive the software without mounting servo arms.
47-
48- # Complete the assembly as shown in the illustrations. Widen the holes for
49- servo mounting if needed. Acrylic is brittle and easily breaks wen the
50- mounting holes are to small. Only push the servo arms onto their hubs, don't
51- secure them with screws! For initial calibration do not mount the resting
52- clip for the wiper (danger of collision with the pen). Glue or screw the
53- servo arms to the acrylic parts.
54-
55- # When you connect the Arduino, it will first run a calibration routine. The
56- arms move between 2 positions, which correspond to exaxtly 90° servo
57- movement.
58-
59- The calibration values SERVOFAKTOR, SERVOLEFTNULL, and SERVORIGHTNULL allow
60- to adjust the actual positions to the ideal ones. Please take care that the
61- servos allow sufficient range and do not hit their internal end stops. If
62- needed move the servo arms on the hubs.
63-
64- # Finally mount the pen and wiper rest. Uncomment the #define CALIBRATION in
65- the Arduino scetch or remove the line.
66-
67- # Adjust the current time in the Arduino program and you are ready to go.
23+ See: http://www.thingiverse.com/thing:248009/#instructions
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