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Product description
Festo – GDCP-CMMO-ST-EA-SY-EN – 2017-05c – English
47
2.5.7
Positioning mode
Positioning mode makes it possible to position to a specified target position (point-to-point position
ing), with the option of reduced torque.
Variants
Description
Absolute
Position, referenced to the axis zero point
Relative to the setpoint position
Distance referenced to the last setpoint position
Relative to the actual position
Distance referenced to the current position (actual position)
Tab. 2.40 Order variants in positioning mode
For certain applications (e.g. axis of rotation) an endless mode can be parameterised to enable the
actuator (for example) always only to move in the positive direction. The software limit stops must be
disabled for this.
Course of path
The controller computes a new path course from the parameterisation of the command to activate the
motor. The calculated path track remains unchanged until the end of the order. While carrying out an
order, the deviation between setpoint position based on path characteristics and the actual position
should be calculated and monitored (
è
Chapter 2.7.1, following error).
Parameters
Description
Position
Target specification (variants
è
Velocity
Maximum value for velocity (speed)
Acceleration
Maximum value for acceleration
Retardation
(deceleration)
Maximum value for deceleration
Jerk acceleration
(jerk in acceleration)
Acceleration change at start and end of the acceleration phase.
Lower values result in gentler movement. The value “0” means
that no reverse limiting is enabled.
Jerk in deceleration
(jerk in deceleration)
Change in acceleration at the start and end of the deceleration
phase. Lower values cause gentler braking action. The value “0”
means that no reverse limiting is enabled.
Final speed
2)
Final speed of the order (standard = 0)
1)
Separately adjustable in FCT if the asymmetric ramp generator has been enabled. Otherwise identical to acceleration.
2)
Parameterisation for record linking (binary profile)
Tab. 2.41 Parameter for influencing the track characteristics