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Jerk time calculation

1/12/2018 4:33 PM	Rate (0)
BeppeConti Experienced Member Joined: 7/22/2014 Last visit: 3/17/2025 Posts: 68 Rating: (2)	I would need to calculate exactly the time taken by an axis when it performs a positioning movement with with S-ramp enabled (function "_pos" with velocityprofile:=smooth). I know: - start position - end position - max. velocity - max. acceleration e deceleration ramp - Jerk I don't know the algorithm used by simotion and I can't do the calculation. Can someone help me? Thank you Giuseppe

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1/12/2018 6:15 PM	Rate (1)
Jeff Casagrande Posts: 1529 Rating: (203)	Time taken during S = delata a/j Time taken during linear ramp = delta v/a Time taken during linear motion = delta s/v Fairly good summary here https://www.pmdcorp.com/resources/get/mathematics-of-motion-control-profiles-article Or, you can let SIMOTION calculate it for you using the _getAxisStoppingData() command.
Jeff Casagrande Posts: 1529 Rating: (203)	Last edited by: Jeff Casagrande at: 1/12/2018 6:19:53 PM
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1/23/2018 12:32 PM	Rate (0)
BeppeConti Experienced Member Joined: 7/22/2014 Last visit: 3/17/2025 Posts: 68 Rating: (2)	Thanks I solved almost all cases (but not all). Beppe

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