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super precision rotating mechanism
- Thread starter MH500
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- #3
This mini conveyors dimention is 250x100x10 mm.
The super precision means that, this is a scaling conveyor and the scale tolerance is 0.1 gram.
It means that any unwanted vibration affets on scaling precision.
I khow that nothing is perfect but I want to reach smooth movement as much as possible.
The super precision means that, this is a scaling conveyor and the scale tolerance is 0.1 gram.
It means that any unwanted vibration affets on scaling precision.
I khow that nothing is perfect but I want to reach smooth movement as much as possible.
What is the size and weight of the items being weighed?
What is the conveyor speed, and is it variable speed and/or incremental start-stop?
What is the motor and drive?
What is the power transmission?
What is the conveyor belt, and how is it driven by roller or sprocket?
Don't forget about torsional vibrations! Don't forget to preload the precision ball bearings!
Walt
What is the conveyor speed, and is it variable speed and/or incremental start-stop?
What is the motor and drive?
What is the power transmission?
What is the conveyor belt, and how is it driven by roller or sprocket?
Don't forget about torsional vibrations! Don't forget to preload the precision ball bearings!
Walt
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- #5
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- #6
What do you mean by backlash in the bearings? I've never heard backlash used in relation to bearings, only gears and such... Do you mean radial/axial play? This can mostly be removed with adequate pre-load. I'd recommend that you pick a bearing manufacturer and talk to their technical sales or applications engineering department, this is what those guys are there for.
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- #8
I wanted to know is there any other way for rotation without ball bearings?
The ball bearings are some unsteady.(or radial/axial play as you said)
It's very low but it is and preload can't remove it perfectly.
I was thinking about grinding shaft and use submersible Brass bush or something like this instead of ball bearings.
Do you have any experience about that?
The ball bearings are some unsteady.(or radial/axial play as you said)
It's very low but it is and preload can't remove it perfectly.
I was thinking about grinding shaft and use submersible Brass bush or something like this instead of ball bearings.
Do you have any experience about that?
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- #10
Hi MH500,
I understand there is probably language and possibly cutltural differences at play here.
"If you don't know the solution , there is no need to post a comment."
Like others, I respectfully submit that a "solution" requires first knowing, and defining "the problem."
Do you believe you have defined your problem ?
"The NASA’s BEST Engineering Design Model serves as a foundation for all BEST activities. BEST Activity Guides were designed to teach students the Engineering Design Process (EDP) as an iterative process that engineers use to guide them in problem solving. NASA Engineers ask questions, imagine solutions, plan designs, create and test models, and then make improvements. These steps all contribute to mission success and may be described as follows:
ASK: Students identify the problem, requirements that must be met, and constraints that must be considered..................."
I understand there is probably language and possibly cutltural differences at play here.
"If you don't know the solution , there is no need to post a comment."
Like others, I respectfully submit that a "solution" requires first knowing, and defining "the problem."
Do you believe you have defined your problem ?
"The NASA’s BEST Engineering Design Model serves as a foundation for all BEST activities. BEST Activity Guides were designed to teach students the Engineering Design Process (EDP) as an iterative process that engineers use to guide them in problem solving. NASA Engineers ask questions, imagine solutions, plan designs, create and test models, and then make improvements. These steps all contribute to mission success and may be described as follows:
ASK: Students identify the problem, requirements that must be met, and constraints that must be considered..................."
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- #13
Good luck with that, try talking to a bearing manufacturer with the information you have and you will see how little info you have.
“Do not worry about your problems with mathematics, I assure you mine are far greater.” Albert Einstein
“Do not worry about your problems with mathematics, I assure you mine are far greater.” Albert Einstein
The answer to the current question is just simple: No, you cannot do it. Elastic materials with imperfections always have some vibration when they are in motion. Fluid film bearings also have sources of vibration. Just as we can't *eliminate* friction, we can't *eliminate* vibration in moving parts.
You could try to describe the actual vibration limits (.0001", .00001" displacement peak to peak for example). Or you could try to describe the existing attempts and we can try to offer relevant suggestions to improve on it. Or you could hire a consultant with precision machine design to assist.
You could try to describe the actual vibration limits (.0001", .00001" displacement peak to peak for example). Or you could try to describe the existing attempts and we can try to offer relevant suggestions to improve on it. Or you could hire a consultant with precision machine design to assist.
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- #16
This is the answer that I was looking for.
So there is no way to eliminate vibeartion totally.
It seems l have to use high precision series of ball bearings.
This project is prototype and I don't know the the allowed limit of vibration yet.
Thank u and the others for your help
So there is no way to eliminate vibeartion totally.
It seems l have to use high precision series of ball bearings.
This project is prototype and I don't know the the allowed limit of vibration yet.
Thank u and the others for your help
Michael-Lu
Mining
Vibration during movement is important. It affects the measurement of the load cell.
Supply Forever Global Industry Co., Ltd.
Supply Forever Global Industry Co., Ltd.
Michael-Lu
Mining
This is the answer I have been looking for.
Thank you and others for your help.
Supply Forever Global Industry Co., Ltd.
Thank you and others for your help.
Supply Forever Global Industry Co., Ltd.
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