Linear and rotary movement of a shaft

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SUMMARY

The discussion focuses on designing a parallel plate rheometer, specifically addressing the challenges of vertically moving the top plate while maintaining a precise gap of 0.8mm to 0.9mm and ensuring parallelism within microns. The top plate is driven by a servomotor attached to a shaft, and the proposed solution involves using an optical stage with a screw-jack mechanism for precise vertical movement. This method is recognized for its accuracy, although further insights from the community are encouraged.

PREREQUISITES
  • Understanding of parallel plate rheometry
  • Familiarity with servomotor operation
  • Knowledge of optical stage mechanisms
  • Experience with precision engineering and micrometer adjustments
NEXT STEPS
  • Research screw-jack mechanisms for precise vertical movement
  • Explore optical stage designs used in holography
  • Learn about servomotor control techniques
  • Investigate methods for achieving micrometer-level parallelism
USEFUL FOR

Engineers and researchers involved in rheometer design, mechanical engineers focusing on precision movement, and anyone interested in advanced fluid mechanics applications.

harshith
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hi
i am going to design a parallel plate rheometer as a part of my project.in parallel plate rheometer, the fluid is sandwitched between the plates and rotation is given to the top plate.top plate is made with shaft, rotation is provided to the shaft by servomotor and for placing the fluid and removing the fluid,the top plate has to move up and down.here my problem is how to move the plate up and down , how to maintain the gap (0.8mm ,0.9mm)precisely and how to maintain parallelism of two plates with in microns.
please help me in this.very urgent.
 
Engineering news on Phys.org
Welcome to PF, Hargarbageh.
My first thought in this matter would be an optical stage as used in holography. The drive is usually by a screw-jack mechanism, and can be incredibly precise. I'm afraid that I don't know enough to give you more information. I'm sure that others here can, though.
 

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