Parker
Hannifin
Example 1
Two axes are set to different acceleration, deceleration, and
velocities, and are moved the same distance.
JOG ACC X1000 Y500
JOG DEC X1000 Y500
JOG VEL X25 Y50
JOG INC X10 Y10
Figure 4 looks at the commanded motion of the X axis. In the upper
graph (velocity motion profile),
JOG ACC
and
JOG DEC
determine
the acceleration and deceleration values, which always graph as
ascending and descending slopes, respectively.
JOG VEL
always
graphs as a horizontal line once the axis is up to speed. The area
under the velocity profile graph is the distance traveled.
Figure 4 X-Axis Velocity and Position Profiles
In the lower graph (position motion profile) of Figure 4, the curve between
t
0
and
t
1
shows the change in position during the time it takes for the X axis to
accelerate from zero to the target velocity. Likewise, the curve between
t
2
and
t
3
shows the change in position during deceleration to zero. (The actual
acceleration and deceleration curves shown are approximated due to the
resolution of the graph.) The straight line between points
P
1
and
P
2
is where the
X-axis movement is a constant velocity.
Making Motion 67
