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Example - Multiple Move Sequence
Required Motion Profiles:
X-Axis 2000
counts
Position
15000
count/sec Speed
500000 counts/sec2
Acceleration
Y-Axis 100
counts
Position
5000
count/sec Speed
500000 counts/sec2
Acceleration
This example will specify a relative position movement on X and Y axes. The movement on each axis
will be separated by 40 msec. Fig. 6.1 shows the velocity profiles for the X and Y axes.
Instruction
Interpretation
#A Begin
Program
PR 2000,100
Specify relative position movement of 2000 and 100 counts for the X and Y axes.
SP 15000,5000
Specify speed of 15000 and 5000 counts / sec
AC 500000,500000
Specify acceleration of 500000 counts / sec
2
for all axes
DC 500000,500000
Specify deceleration of 500000 counts / sec
2
for all axes
BG X
Begin motion on the X axis
WT 40
Wait 40 msec
BG Y
Begin motion on the Y axis
EN End
Program
VELOCITY
(COUNTS/SEC)
20000
10000
5000
15000
20
40
60
80
TIME (ms)
100
X axis velocity profile
Y axis velocity profile
0
Figure 6.1 - Velocity Profiles of XY
Notes on fig 6.1: The X axis has a ‘trapezoidal’ velocity profile, while the Y axis has a ‘triangular’
velocity profile. The X axis accelerates to the specified speed, moves at this constant speed, and then
decelerates such that the final position agrees with the commanded position, PR. The Y axis
accelerates, but before the specified speed is achieved, must begin deceleration such that the axis will
stop at the commanded position. Both axes have the same acceleration and deceleration rate, hence,
the slope of the rising and falling edges of both velocity profiles are the same.
58
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Chapter 6 Programming Motion
DMC-14x5/6
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