Advanced mates (angle, width, path) in Solidworks - Practice Problems & Coding Challenges

Challenge - 5 Problems

🧠 Conceptual

intermediate

Understanding Angle Mate Behavior

In SolidWorks, you apply an angle mate between two faces. What happens if you change the angle value after the mate is applied?

A The faces stay fixed and the angle value cannot be changed after applying the mate.

B The two faces rotate relative to each other to maintain the new angle value.

C The software automatically removes the mate if the angle is changed.

D The angle mate converts to a coincident mate when the angle is changed.

💡 Hint

Think about what an angle mate controls between two parts.

An angle mate controls the relative rotation between two faces. Changing the angle value rotates the faces to maintain that angle.

❓ dax_lod_result

intermediate

Calculating Width Mate Constraint Result

You have a width mate between two parallel faces with a width value of 50 mm. If the faces move and the distance between them becomes 60 mm, what will be the result of the width mate constraint?

A The width mate will force the faces to stay 50 mm apart, overriding the 60 mm distance.

B The width mate will allow the faces to be 60 mm apart because it only suggests a width.

C The width mate will break because the faces moved beyond the set width.

D The width mate will automatically adjust to 60 mm to match the new distance.

💡 Hint

Consider what a width mate enforces between two faces.

A width mate enforces a fixed distance between two parallel faces. If the faces move, the mate forces them back to the set width.

🔧 Formula Fix

advanced

Diagnosing Path Mate Failure

You applied a path mate to a component to follow a curved edge, but the component does not move along the path as expected. Which of the following is the most likely cause?

A The component is fixed and cannot move along the path.

B The angle mate conflicts with the path mate causing the failure.

C The width mate is overriding the path mate movement.

D The path curve is not a valid edge or sketch entity recognized by SolidWorks.

💡 Hint

Think about what entities SolidWorks accepts for path mates.

Path mates require a valid edge or sketch curve. If the path is invalid, the component won't move along it.

❓ visualization

advanced

Visualizing Combined Mates Effect

You have a component constrained by an angle mate of 45 degrees and a width mate of 30 mm between two faces. What will the component's position look like?

A The component is rotated 45 degrees relative to the reference and the faces are exactly 30 mm apart.

B The component is rotated 45 degrees but the faces can be any distance apart.

C The component is not rotated but the faces are 30 mm apart.

D The component is free to move and rotate because the mates conflict.

💡 Hint

Consider how angle and width mates control rotation and distance.

The angle mate controls rotation, and the width mate controls distance between faces. Both constraints apply simultaneously.

🎯 Scenario

expert

Designing a Complex Assembly Movement

You need to design an assembly where a slider moves along a curved path while maintaining a 30-degree angle relative to a fixed base and keeping a constant width of 20 mm between two faces. Which combination of mates will achieve this?

A Use an angle mate set to 30 degrees and a coincident mate on the path edge.

B Use two coincident mates and a width mate set to 20 mm only.

C Use a path mate for the curved movement, an angle mate set to 30 degrees, and a width mate set to 20 mm.

D Use a width mate set to 20 mm and a parallel mate without angle or path mates.

💡 Hint

Think about how each mate controls movement, rotation, and spacing.

A path mate controls movement along the curve, the angle mate controls rotation, and the width mate controls spacing between faces. Together, they achieve the required constraints.

Practice

1.

What is the main purpose of using angle mates in SolidWorks assemblies?

easy

A. To create a path for a part to follow

B. To control the rotational angle between two components

C. To lock the position of a part in all directions

D. To fix the distance between two parts

Solution

1. Step 1: Understand the function of angle mates

   Angle mates specifically control the rotational angle between two parts, allowing precise angular positioning.

2. Step 2: Compare with other mate types

   Distance mates control linear spacing, fixed mates lock all movement, and path mates guide movement along a path.

3. Final Answer:

   To control the rotational angle between two components -> Option B

4. Quick Check:

   Angle mates = control rotation [OK]

Hint: Angle mates set rotation, not distance or fixed position [OK]

Common Mistakes:

• Confusing angle mates with distance mates
• Thinking angle mates fix all movement
• Mixing path mates with angle mates

2.

Which of the following is the correct syntax to create a width mate between two faces in SolidWorks?

1. Select both faces
2. Choose Width Mate
3. Select the center plane
4. Confirm

easy

A. Select one face and one edge, then apply width mate directly

B. Select two edges, then select a reference axis to define the width mate

C. Select two faces, then select a center plane to define the width mate

D. Select two faces only, width mate applies automatically

Solution

1. Step 1: Identify the correct selection for width mate

   Width mates require selecting two faces and a center plane or axis to define the width constraint.

2. Step 2: Eliminate incorrect options

   Edges alone or one face and one edge do not define width mates properly; automatic application without center reference is incorrect.

3. Final Answer:

   Select two faces, then select a center plane to define the width mate -> Option C

4. Quick Check:

   Width mate = two faces + center plane [OK]

Hint: Width mates need two faces plus a center reference [OK]

Common Mistakes:

• Selecting edges instead of faces
• Skipping the center plane selection
• Assuming width mate applies automatically

3.

Given an assembly where a path mate is applied to a slider component along a curved edge, what will happen if the path is a closed loop?

medium

A. The slider will move continuously around the loop without stopping

B. The slider will stop at the start point and cannot move further

C. The slider will move back and forth along the path

D. The slider will detach from the path and float freely

Solution

1. Step 1: Understand path mate behavior on closed loops

   Path mates constrain movement along a defined path. If the path is closed, the component can move continuously around it.

2. Step 2: Analyze other options

   Stopping or detaching does not occur unless additional mates or limits are applied; back and forth motion requires limits or motors.

3. Final Answer:

   The slider will move continuously around the loop without stopping -> Option A

4. Quick Check:

   Closed path mate = continuous motion [OK]

Hint: Closed path means endless movement along it [OK]

Common Mistakes:

• Assuming slider stops at start point
• Thinking path mate causes back and forth by default
• Believing slider detaches without extra mates

4.

In an assembly, a user tries to apply an angle mate between two faces but receives an error. What is the most likely cause?

medium

A. The angle mate requires a reference axis which is missing

B. The faces are coincident and angle mate is redundant

C. The two faces are parallel and angle mate cannot be applied

D. The faces belong to the same part and mates require different parts

Solution

1. Step 1: Check mate requirements

   Mates in SolidWorks connect different parts; applying mates between faces of the same part is invalid.

2. Step 2: Evaluate other options

   Angle mates can be applied to parallel faces; coincident faces do not cause errors; reference axis is not always required.

3. Final Answer:

   The faces belong to the same part and mates require different parts -> Option D

4. Quick Check:

   Mates connect parts, not faces on same part [OK]

Hint: Mates only work between different parts [OK]

Common Mistakes:

• Trying to mate faces on the same part
• Assuming parallel faces block angle mates
• Thinking reference axis is always needed

5.

You need to assemble a robotic arm where the forearm must rotate exactly 45 degrees relative to the upper arm and slide along a curved track. Which combination of advanced mates should you use?

hard

A. Angle mate for rotation and path mate for sliding along the track

B. Width mate for rotation and angle mate for sliding

C. Path mate for rotation and width mate for sliding

D. Distance mate for rotation and path mate for sliding

Solution

1. Step 1: Identify mate for rotation control

   Angle mates precisely control rotation between parts, perfect for setting 45 degrees between forearm and upper arm.

2. Step 2: Identify mate for sliding along curved track

   Path mates constrain movement along a curve, ideal for sliding motion along the track.

3. Step 3: Eliminate incorrect options

   Width mates control width, not rotation or sliding; distance mates control linear spacing, not rotation.

4. Final Answer:

   Angle mate for rotation and path mate for sliding along the track -> Option A

5. Quick Check:

   Rotation = angle mate, sliding = path mate [OK]

Hint: Use angle for rotation, path for curved sliding [OK]

Common Mistakes:

• Using width mate for rotation
• Confusing distance mate with angle mate
• Applying path mate for rotation