Figure 6.12: Electronic Cam Example
This disengages the slave axis at a specified master position. If the parameter is outside the master cycle, the
stopping is instantaneous.
To illustrate the complete process, consider the cam relationship described by
the equation:
Y = 0.5
*
X + 100 sin (0.18
*
X)
where X is the master, with a cycle of 2000 counts.
The cam table can be constructed manually, point by point, or automatically by a program. The following program
includes the set-up.
The instruction EAX defines X as the master axis. The cycle of the master is
2000. Over that cycle, Y varies by 1000. This leads to the instruction EM 2000,1000.
Suppose we want to define a table with 100 segments. This implies increments of 20 counts each. If the master
points are to start at zero, the required instruction is EP 20,0.
The following routine computes the table points. As the phase equals 0.18X and X varies in increments of 20, the
phase varies by increments of 3.6°. The program then computes the values of Y according to the equation and
assigns the values to the table with the instruction ET[N] = ,Y.
Chapter 6 Programming Motion • 101 DMC-40x0 User Manual
Master X4000
2250
2000 6000
3000
1500
0
To Next Page
Loading...
