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Servo motor "screams"

Created by: AutoGen_1076725 at: 2/22/2023 1:01 PM (3 Replies)

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2/22/2023 1:01 PM	Rate (0)
AutoGen_1076725 Regular Member Joined: 11/16/2020 Last visit: 5/17/2024 Posts: 11 Rating: (0)	I have a problem with a servo motor that "screams". There is a metalic wheel attatched to the motor shaft. This metalic wheel starts to vibrate and gives a high tone noise. It is the same noise for all rpm, even if the motor is at zero rpm it screams and vibrates. If I remove the metallic wheel from the servo motor the noise disappeares. It seems like there is a resonance frequency between the servo motor feedback and the metalic wheel. Can the motor be tuned so this screaming noise disappeare? I have tried to change the P and I parameters but the noise is still there.

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2/22/2023 1:33 PM	Rate (0)
qwazee Platinum Member Joined: 3/30/2020 Last visit: 9/15/2025 Posts: 5451 Rating: (1064)	AutoGen_1076725 I have a problem with a servo motor that "screams". There is a metalic wheel attatched to the motor shaft. This metalic wheel starts to vibrate and gives a high tone noise. It is the same noise for all rpm, even if the motor is at zero rpm it screams and vibrates. If I remove the metallic wheel from the servo motor the noise disappeares. It seems like there is a resonance frequency between the servo motor feedback and the metalic wheel. Can the motor be tuned so this screaming noise disappeare? I have tried to change the P and I parameters but the noise is still there. To help us to help you, I am going to help you help with some more detail. Please tell us what in this equation are Siemens devices and which are not. Go ahead and give us the part numbers, firmware versions and any other detail which reveals what you have. Where was this P and I parameter adjusted? PLC code / Servo drive / Motion Controller / ..?
	Activities of this user is voluntary. There is no obligation or liability placed on this user. Though optional, your 'please' and 'thank you' is highly valued.
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2/22/2023 2:02 PM	Rate (0)
AutoGen_1076725 Regular Member Joined: 11/16/2020 Last visit: 5/17/2024 Posts: 11 Rating: (0)	It is a SINAMICS S120 servodrive and Siemens 1FT7084-1AH71-1CG1 servo motor It is a closed loop regulation so P and I is in the servo drive Attachment image.png (330 Downloads)
	Last edited by: AutoGen_1076725 at: 02/22/2023 14:21:03 Last edited by: AutoGen_1076725 at: 02/22/2023 14:31:43 Last edited by: AutoGen_1076725 at: 02/22/2023 14:32:17 Last edited by: AutoGen_1076725 at: 02/22/2023 14:35:01
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2/22/2023 3:09 PM	Rate (0)
jacek d Platinum Member Joined: 9/23/2005 Last visit: 9/15/2025 Posts: 5116 Rating: (768)	The drive requires optimization. Start with procedures described in the chapter 13.
	Last edited by: jacek d at: 02/22/2023 15:13:06 Regards, Jacek What is confusing you is the fact that you never see a number but always its digit representation. So you end up thinking that the number is the representation. - Andrej Bauer Any claims against me - based on whatever legal reason - resulting from the use of any code and/or ideas presented on this forum shall be excluded. #StayWithUkraine
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This contribution was helpful to 1 thankful Users qwazee

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