Operation Theory
75
4.1.4 S-curve profile motion
This mode moves a single-axis motor to a specified position (or
distance) with an S-curve velocity profile. S-curve acceleration
profiles are useful for both stepper and servomotors. The smooth
transitions between the start of the acceleration ramp and transi-
tion to constant velocity produce less wear and tear than a trape-
zoidal profile motion. The smoother performance increases the life
of the motor and the mechanics of the system.
There are several parameters that need to be set in order to make
a S-curve move. These include:
Pos:
target position in absolute mode, in units of pulses
Dist:
moving distance in relative mode, in units of pulses
StrVel:
start velocity, in units of PPS
MaxVel: maximum velocity, in units of PPS
Tacc:
time for acceleration (StrVel -> MaxVel), in units of seconds
Tdec:
time for deceleration (MaxVel -> StrVel), in units of seconds
VSacc: S-curve region during acceleration, in units of PPS
VSdec: S-curve region during deceleration, in units of PPS
Normally, the accel/decel period consists of three regions: two
VSacc/VSdec curves and one linear. During VSacc/VSdec, the
jerk (second derivative of velocity) is constant, and during the lin-
ear region, the acceleration (first derivative of velocity) is constant.
In the first constant jerk region during acceleration, the velocity
Summary of Contents for MPC-8164
Page 4: ......
Page 12: ......
Page 14: ...2 Introduction Figure 1 1 PCI 8164 block diagram ...
Page 50: ...38 Installation ...
Page 70: ...58 Signal Connections ...
Page 74: ...62 Signal Connections 3 17 1 Isolated input channels 3 17 2 Isolated output channels ...
Page 75: ...Signal Connections 63 3 17 3 Example of input connection ...
Page 76: ...64 Signal Connections 3 17 4 Example of output connections ...
Page 109: ...Operation Theory 97 ...
Page 110: ...98 Operation Theory ...
Page 111: ...Operation Theory 99 ...
Page 112: ...100 Operation Theory ...
Page 113: ...Operation Theory 101 ...
Page 148: ...136 Operation Theory Users can use this function to check if auto trigger is running Results ...
Page 280: ...268 Connection Example Figure 7 2 Connection of PCI 8164 with Panasonic Driver ...
Page 287: ...Connection Example 275 7 3 3 Mechanical Dimensions ...
Page 297: ...Connection Example 285 7 5 2 Mechanical Dimensions ...
Page 300: ...288 Connection Example 7 6 Wiring with DIN 814M J3A ...
Page 304: ...292 Connection Example 7 7 Wiring with DIN 814Y ...
Page 308: ...296 ...