Advanced mates (angle, width, path) in Solidworks - Real Business Scenario

Scenario Mode

👤 Your Role: You are a mechanical design engineer working on an assembly in SolidWorks.

📋 Request: Your manager wants you to create an assembly where parts move with precise angular relationships, maintain specific widths between components, and follow a defined path for motion simulation.

📊 Data: You have an assembly with multiple parts including shafts, plates, and sliders. You have access to the parts' geometry and need to apply advanced mates to control their relative positions and movements.

🎯 Deliverable: A SolidWorks assembly file demonstrating the use of angle mates, width mates, and path mates to control part positioning and motion, along with a report explaining the mate configurations and their effects.

Sample Data

Part Name	Type	Key Features	Initial Position
Shaft A	Cylindrical	Diameter 20mm, Length 100mm	Horizontal, at origin
Plate B	Rectangular	Width 50mm, Height 100mm, Thickness 5mm	Vertical, 30mm from Shaft A
Slider C	Block	Width 20mm, Length 40mm, Height 10mm	Aligned with Plate B, movable
Guide Rail D	Linear rail	Length 150mm, Width 15mm	Horizontal, below Shaft A

1

Step 1: Apply an angle mate between Shaft A and Plate B to set a 45-degree angle.

Select cylindrical face of Shaft A and planar face of Plate B, apply Angle Mate, set angle to 45 degrees.

Expected Result

Plate B is positioned at a 45-degree angle relative to Shaft A.

2

Step 2: Use a width mate to center Slider C between the two faces of Plate B.

Select the two parallel faces of Plate B and the central face of Slider C, apply Width Mate.

Expected Result

Slider C is perfectly centered between the two faces of Plate B.

3

Step 3: Apply a path mate to constrain Slider C to move along Guide Rail D.

Select the edge of Guide Rail D as the path and the corresponding face or edge of Slider C, apply Path Mate.

Expected Result

Slider C can only move along the length of Guide Rail D.

4

Step 4: Test the assembly motion by dragging Slider C along the Guide Rail D and observe the angular relationship with Shaft A and Plate B.

Use SolidWorks Move Component tool to drag Slider C along the path.

Expected Result

Slider C moves smoothly along Guide Rail D, maintaining the 45-degree angle between Shaft A and Plate B, and remains centered between Plate B faces.

Final Result

Assembly Dashboard
------------------
| Shaft A (Horizontal) |
|       |              |
|      /|  Plate B (45°)|
|     / |              |
|    /  |              |
| Slider C (Centered, moves along Guide Rail D) |
|-----------------------------------------------|
| Guide Rail D (Horizontal path)                 |

✓Angle mate successfully sets Plate B at 45 degrees to Shaft A.

✓Width mate centers Slider C between Plate B faces precisely.

✓Path mate restricts Slider C movement along Guide Rail D.

✓Combined mates allow controlled motion and positioning in assembly.

Bonus Challenge

Add a limit mate to restrict Slider C's movement range along Guide Rail D to 100mm.

Show Hint

Use Limit Distance Mate on Slider C relative to Guide Rail D edges to define min and max travel.

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