Page 74 - Robot Builders Source Book - Gordon McComb

Exercises 63

is controlled by the system's computer 4. The ultraviolet beam generated by means of
laser 5 is focussed with the aid of a mirror 6, which is also controlled by a computer,
so that the beam moves on the surface of the liquid according to a given program. As
a result of this operation, a thin plane layer is created with a predetermined shape. In
the next step, the plate 3 moves down for a distance corresponding to the thickness of
one layer, and the procedure is repeated. At this point in the process, the trajectory of
the beam may be changed according to the configuration of the new layer. Thus, the
body grows, layer by layer, to form a model of the desired shape. Figure 2.19b) shows
examples of possible units produced in this way.

Exercises

Try to design the kinematic layout of a:
1. Sewing machine.
2. Machine for producing the chain shown in Figure 2.1 in accordance with the
production layout given in Figure 2.2.
3. Internal combustion engine.
4. Domestic dough mixer (dough kneader).
5. Typewriter.
6. Mechanical toy, spring or electrically driven.
7. Machine gun.
8. Automatic record player.
9. Photocopying machine.

TEAM LRN