National Instruments NI-Motion - Manual (Page 135)

Chapter 10 Electronic Gearing and Camming
© National Instruments Corporation 10-13 NI-Motion User Manual
2,000 counts in the opposite direction of the conveyor belt at half the speed
that the conveyor belt is traveling at. Figure 10-10 shows the move profile
of the first and second move segments.
Figure 10-10. First and Second Move Segment Profile
Table 10-1 shows the camming table that corresponds to the move profile
in Figure 10-10
.
Table 10-1 shows that the camming cycle is 6,000 counts and is divided into
equal length segments.
Tip Because the camming cycle is 6,000 counts, the master cycle must also be
6,000 counts.
Table 10-1. Welding Application Cam Table
Time
(seconds)
Master
Position
(counts) Slave Position
(counts) Ratio*
0 0 0 —
2 2000 2000 1
4 4000 1000 –0.5
6 6000 0 –0.5
* Ratio =
∆SlaveDistance / ∆MasterDistance
Slave
Master
2000
1000
2000 4000 6000
Segment 1
Segment 2