Reference geometry (planes, axes, points) in Solidworks - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is a reference plane in SolidWorks?

A reference plane is a flat surface used as a base or guide to create sketches or features. It helps position and align parts in 3D space.

beginner

How do reference axes help in SolidWorks modeling?

Reference axes provide a line in 3D space that can be used for rotation, mirroring, or aligning features. They help control orientation and symmetry.

beginner

What is the purpose of reference points in SolidWorks?

Reference points mark exact locations in 3D space. They are used to position features, measure distances, or create relations between parts.

intermediate

Can you create a reference plane offset from an existing face? How?

Yes, by selecting an existing face and specifying a distance, you create a new plane parallel to that face at the offset distance.

intermediate

Why is using reference geometry important in complex assemblies?

Reference geometry helps organize parts precisely, maintain alignment, and control relationships, making assembly design easier and more accurate.

What type of reference geometry would you use to create a rotational axis?

A Reference plane

B Reference point

C Reference axis

D Sketch line

A reference axis provides a line around which features can rotate or mirror.

How do you create a reference plane parallel to an existing face?

A Create a new part

B Draw a sketch on the face

C Use a reference point

D Select the face and specify an offset distance

You select the existing face and enter an offset distance to create a parallel plane.

Which reference geometry helps mark a specific location in 3D space?

A Reference point

B Reference axis

C Reference plane

D Sketch circle

Reference points mark exact locations useful for positioning and measurements.

Why use reference geometry in assemblies?

A To organize and align parts precisely

B To add colors

C To increase file size

D To create textures

Reference geometry helps keep parts aligned and organized in assemblies.

Which of these is NOT a type of reference geometry in SolidWorks?

A Reference plane

B Reference volume

C Reference point

D Reference axis

Reference volume is not a standard reference geometry type in SolidWorks.

Explain how reference planes, axes, and points help in building a 3D model in SolidWorks.

Think about how each geometry type guides the shape and position of parts.

Describe a real-life example where using reference geometry would make designing an assembly easier.

Imagine building a model car or machine with many parts.

Practice

1. What is the main purpose of creating reference geometry like planes, axes, and points in SolidWorks?

easy

A. To add color and texture to parts

B. To increase the file size of the model

C. To provide invisible guides for sketching and aligning parts

D. To automatically generate 3D animations

Solution

1. Step 1: Understand what reference geometry does

   Reference geometry creates invisible guides such as planes, axes, and points that help in sketching and aligning parts accurately.

2. Step 2: Eliminate unrelated options

   Adding color, increasing file size, or generating animations are unrelated to reference geometry's purpose.

3. Final Answer:

   To provide invisible guides for sketching and aligning parts -> Option C

4. Quick Check:

   Reference geometry = invisible guides [OK]

Hint: Reference geometry guides your design, not decor or animation [OK]

Common Mistakes:

• Confusing reference geometry with visual effects
• Thinking it changes part appearance
• Assuming it creates animations

2. Which of the following is the correct way to create a new reference plane offset from an existing plane in SolidWorks?

easy

A. Right-click the part and select 'Add Axis'

B. Draw a line and convert it to a plane

C. Use the Extrude tool on the existing plane

D. Select the existing plane, then specify the offset distance and direction

Solution

1. Step 1: Recall how to create an offset plane

   In SolidWorks, to create an offset plane, you select an existing plane and specify the offset distance and direction.

2. Step 2: Identify incorrect methods

   Drawing a line or using Extrude does not create planes. Adding an axis is unrelated to creating a plane.

3. Final Answer:

   Select the existing plane, then specify the offset distance and direction -> Option D

4. Quick Check:

   Offset plane = select plane + offset [OK]

Hint: Offset planes start from existing planes with distance [OK]

Common Mistakes:

• Trying to create planes from lines
• Using Extrude tool incorrectly
• Confusing axes with planes

3. Given a part with a default Front Plane and a created reference axis along an edge, what will happen if you create a new plane perpendicular to that axis and passing through a point on the part?

medium

A. A new plane will be created perpendicular to the axis and passing through the point

B. An error will occur because planes cannot be perpendicular to axes

C. The existing Front Plane will be deleted

D. The axis will be converted into a plane

Solution

1. Step 1: Understand plane creation rules

   In SolidWorks, you can create a plane perpendicular to an axis and passing through a point by selecting those references.

2. Step 2: Evaluate the options

   No error occurs; existing planes are not deleted; axes are not converted into planes automatically.

3. Final Answer:

   A new plane will be created perpendicular to the axis and passing through the point -> Option A

4. Quick Check:

   Plane perpendicular to axis + point = new plane [OK]

Hint: Planes can be perpendicular to axes through points [OK]

Common Mistakes:

• Thinking planes can't be perpendicular to axes
• Assuming existing planes get deleted
• Confusing axes and planes

4. You tried to create a reference axis by selecting two points, but SolidWorks did not create the axis. What is the most likely reason?

medium

A. The two points are coincident or the same point

B. You need to select three points to create an axis

C. Axes cannot be created from points in SolidWorks

D. You must create a plane first before creating an axis

Solution

1. Step 1: Understand axis creation from points

   To create an axis from two points, they must be distinct and not coincident.

2. Step 2: Analyze the problem

   If the points are the same or coincident, SolidWorks cannot define a direction for the axis, so it fails.

3. Final Answer:

   The two points are coincident or the same point -> Option A

4. Quick Check:

   Distinct points needed for axis [OK]

Hint: Two distinct points needed to create an axis [OK]

Common Mistakes:

• Selecting the same point twice
• Thinking three points are needed
• Believing axes can't be made from points

5. You need to create a reference plane that is angled 45 degrees to the Front Plane and passes through a specific edge of your part. Which steps should you follow?

hard

A. Draw a sketch on the Front Plane and extrude it at 45 degrees

B. Select the Front Plane, then select the edge as the rotation axis, and set the angle to 45 degrees

C. Create a new axis first, then create a plane offset 45 degrees from the Top Plane

D. Select the edge and convert it directly into a plane

Solution

1. Step 1: Use the Front Plane and edge as references

   To create an angled plane, select the Front Plane as the base and the edge as the rotation axis.

2. Step 2: Set the angle to 45 degrees

   Specify the angle of 45 degrees to create the new reference plane at the desired orientation.

3. Final Answer:

   Select the Front Plane, then select the edge as the rotation axis, and set the angle to 45 degrees -> Option B

4. Quick Check:

   Plane angled 45° = base plane + edge axis + angle [OK]

Hint: Angle planes by rotating base plane around edge axis [OK]

Common Mistakes:

• Trying to convert edges directly into planes
• Using wrong base plane for angle
• Skipping axis creation step