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S120 - EPOS - Reduce Jerk Time

Created by: rbresca at: 11/12/2013 2:32 PM (3 Replies)

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11/12/2013 2:32 PM	Rate (0)
rbresca Advanced Member Joined: 9/2/2008 Last visit: 10/1/2024 Posts: 20 Rating: (0)	Hello everybody, I'm trying to reduce as much as possible the velocity S curve . I wasn't able to find any parameter to do the job. The attached picture shows a typical MDI movement of my axis. The green line is the speed. As you can see the speed has a S-curve behavior even if the speed reference (yellow) doesn't. The p2575 parameter is FALSE. Is there a way to reduce jerk time? I want to reach the end point as soon as possible. The image shows that I arrive "near" the setpoint in about 600ms but, then, I need 300 ms more to reach the setpoint. Attachment avanzamento positivo.jpg (190 Downloads)

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11/12/2013 9:00 PM	Rate (0)
zako_ Gold Member Joined: 5/22/2012 Last visit: 3/24/2022 Posts: 895 Rating: (67)	I suppose you haven`t activated the position controller precontrol. I would set it to 100%.

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11/12/2013 11:11 PM	Rate (0)
rbresca Advanced Member Joined: 9/2/2008 Last visit: 10/1/2024 Posts: 20 Rating: (0)	Could you explain which parameter should I set? I wasn't able to find "position pre-control" in the list manual. Thank you

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11/13/2013 2:30 PM	Rate (0)
rbresca Advanced Member Joined: 9/2/2008 Last visit: 10/1/2024 Posts: 20 Rating: (0)	Today, in front of my system, I was able to find the relevant parameter. The parameter is p2543[0]. I've set it to 100% as suggested. Now the actual speed follows very well the desired profile. I've also activated the jerk control (p2575=1) to smooth the angles of the speed profile. Thank you again for the support!

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This contribution was helpful to 1 thankful Users zako_

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