Question

1 Please refer to the picture below to understand what a cantilever looks like. - What are the stiff directions of this cantilever? - Explain what influences this stiffness L = 30 mm W = 5 mm I = 0.1 mm 2 Strength Please refer to the picture below to understand what a Wire-spring looks like. - Explain the failing mechanism of the wirespring applying a force in +Y direction. - Explain the failing mechanism of the wirespring applying a force in -Y direction. - What influences the strength of the wirespring applying a force in Z direction. 3 Elastic guidance - Point out the functional part of this elastic guidance and explain why that's the functional part. 4.1 Situation The design consists of a structure A(stainless steel) and a Mass M(Quartz). By turning the 3mm-bolt you can move the mass M. With the interferometer you can measure the distance with an accuracy of 1 nm. The goal is to position the mass M with an accuracy of 5 um. Questions 1. Which aspects/parameters of this design affect the accuracy 2. Draw the free body diagram 3. Is it possible to reach the accuracy of 5 um 4. How can you improve the design so you can reach a higher accuracy 4.2 1. Which aspects/parameters of this design affect the accuracy 2. Draw the free body diagram 3. Is it possible to reach the accuracy of 5 um 4. How can you improve the design so you can reach a higher accuracy 5 Bending Place sectionviews a, b and c in order of bending stiffness in Z-direction. (from high to low stiffness) Sectionviews are made in the X-Z plane

1 Please refer to the picture below to understand what a cantilever looks like.
- What are the stiff directions of this cantilever?
- Explain what influences this stiffness
L = 30 mm
W = 5 mm
I = 0.1 mm
2 Strength
Please refer to the picture below to understand what a Wire-spring looks like.
- Explain the failing mechanism of the wirespring applying a force in +Y direction.
- Explain the failing mechanism of the wirespring applying a force in -Y direction.
- What influences the strength of the wirespring applying a force in Z direction.
3 Elastic guidance
- Point out the functional part of this elastic guidance and explain why that's the functional part.
4.1 Situation
The design consists of a structure A(stainless steel) and a Mass M(Quartz). By turning the 3mm-bolt you can move the mass M. With the interferometer you can measure the distance with an accuracy of 1 nm. The goal is to position the mass M with an accuracy of 5 um.
Questions
1. Which aspects/parameters of this design affect the accuracy
2. Draw the free body diagram
3. Is it possible to reach the accuracy of 5 um
4. How can you improve the design so you can reach a higher accuracy
4.2
1. Which aspects/parameters of this design affect the accuracy
2. Draw the free body diagram
3. Is it possible to reach the accuracy of 5 um
4. How can you improve the design so you can reach a higher accuracy
5 Bending
Place sectionviews a, b and c in order of bending stiffness in Z-direction.
(from high to low stiffness)
Sectionviews are made in the X-Z plane

Added by Renee B.

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