Tune an S-Curve Profile
Use this procedure to balance the smoothness and cycle time of motion that uses an S-curve profile.
When to Do This Procedure
Do this procedure when you want to decrease the cycle time of an S-curve motion profile, but keep some of the profile’s smoothness.
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To use this procedure, your application must meet these requirements.
- The controller is at revision 16 or later.
- One of these instructions produces the motion.
- Motion Axis Move (MAM)
- Motion Axis Jog (MAJ)
- Motion Axis Stop (MAS)
- The instruction uses an S-curve profile.
To tune an s-curve profile
NOTE:
In this procedure, you increase the jerk. This increases the stress on the equipment and load. Make sure you can identify when the equipment or load has reached its jerk limit.
- Are the Jerk Units set to % of Time?If the Jerk Units AreThen% of TimeContinue with step 2.% of MaximumA. Change the Jerk Units to % of TimeUnits per sec3B. Continue with step 2.
- Set the Jerk values to 50% of Time.Example:
- Test your equipment and observe its jerk.
- Adjust the jerk values.If There IsThenWhich Results InNOT too much jerkReduce the % of TimeToo much jerkIncrease the % of Time
- Repeat steps 3 and 4 until you have the desired balance between smoothness and cycle time.
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