National Instruments NI-Motion User Manual page 131

Chapter 10 Electronic Gearing and Camming
Slave
Master Cycle
Begins to Repeat
Master
Ratio Ratio Ratio Ratio Ratio Ratio
1 2 3 4 1 2
Figure 10-6. Multiple Camming Gear Ratios
An example of a motion control system that can benefit from the flexibility
of electronic camming is welding parts as they travel on a conveyor belt.
Figure 10-7 shows that the welding point moves to the first position, and
then welds the material for a couple of seconds. Because the conveyor belt
keeps moving at a constant rate, the welding point must follow the material
at the same speed as the conveyor belt during the weld process. When the
welding process is finished for one item, the welding point must quickly
return to its initial position and the process repeats.
© National Instruments Corporation 10-9 NI-Motion User Manual