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load inertia ratio

Created by: saeedplc at: 5/15/2012 6:18 PM (6 Replies)

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5/15/2012 6:18 PM	Rate (0)
saeedplc Posts: 288 Rating: (4)	hello all friends. there is something with name of"load inertia ratio" in some of servo drive manuals what is "load inertia ratio" parameter? what effect does it have on performance of servo drive and servo motor if it adjusted too low or too high? best regards.
saeedplc Posts: 288 Rating: (4)
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5/15/2012 6:26 PM	Rate (0)
Vithani Platinum Member Joined: 7/8/2009 Last visit: 6/7/2025 Posts: 1977 Rating: (479)	Hey I just work around Google, and I found nice answers for your questions Here I found some you may be interested in http://answers.yahoo.com/question/index?qid=1006022804188 http://www.control.com/thread/1229665601 Regards Devesh Vithani
	I dont Like people driving Fast, thats the reason I overtake them ;)
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5/16/2012 8:51 AM	Rate (0)
Ajay Gupta Posts: 58 Rating: (19)	Dear Saeed, The parameter for Servo/Vector control in S120 for "load inertia ratio"is p0342. The parameter influences mainly the acceleration/decelaration time and the pre-control. Please refer the attachment. Regards Ajay Gupta Attachment p342.pdf (981 Downloads)
Ajay Gupta Posts: 58 Rating: (19)
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5/16/2012 9:07 AM	Rate (0)
matthias000 Posts: 26 Rating: (2)	Hi everybody, how does this parameter influence the ramp-function generator? Will STARTER give an error, when the time (p1120[0],p1121[0] and p11235[0])is too short? I have currently no possibility to check it. best regards, matthias000
matthias000 Posts: 26 Rating: (2)
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5/16/2012 10:19 AM	Rate (0)
Vithani Platinum Member Joined: 7/8/2009 Last visit: 6/7/2025 Posts: 1977 Rating: (479)	matthias000 Hi everybody, how does this parameter influence the ramp-function generator? Will STARTER give an error, when the time (p1120[0],p1121[0] and p11235[0])is too short? I have currently no possibility to check it. best regards, matthias000 No Starter will not give any error for setting this values You have to check their effects on performance of Servo by your self Regards, Devesh
	I dont Like people driving Fast, thats the reason I overtake them ;)
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This contribution was helpful to 1 thankful Users matthias000

5/16/2012 10:36 AM	Rate (0)
matthias000 Posts: 26 Rating: (2)	Thanks for your answer. But then the load inertia ratio parameter seems senseless to me. Am I right or where is my mind mistake?
matthias000 Posts: 26 Rating: (2)
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5/16/2012 10:58 AM	Rate (0)
Ajay Gupta Posts: 58 Rating: (19)	matthias000 Thanks for your answer. But then the load inertia ratio parameter seems senseless to me. Am I right or where is my mind mistake? Dear Matthias, We can calculateand enter the valuein p342 manually if we already know the moment of inertia of the load about its rotating axis. This is recommended if we cannot perform automatic rotating measurement using starter due to restriction of movement of load or to avoid any damage to mechanics. If there is no such issue or restriction for automatic measurement then it is recommended for p342 toget automatically calculated during the test. Regards Ajay Gupta
Ajay Gupta Posts: 58 Rating: (19)
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This contribution was helpful to 1 thankful Users matthias000

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