Welcome to the Onshape forum! Ask questions and join in the discussions about everything Onshape.

First time visiting? Here are some places to start:
1. Looking for a certain topic? Check out the categories filter or use Search (upper right).
2. Need support? Ask a question to our Community Support category.
3. Please submit support tickets for bugs but you can request improvements in the Product Feedback category.
4. Be respectful, on topic and if you see a problem, Flag it.

If you would like to contact our Community Manager personally, feel free to send a private message or an email.

# Vertically Symmetric Circular Sketch Pattern

Member Posts: 3
I need to create 5 square holes on a circular arc. They catch is the middle one has to be on the vertical axis. What is the best way to create such a construct so that I can adjust arc angle and radius later?
Tagged:

• Member, Developers Posts: 223 EDU
How's this?

Sketch a square, circular pattern three elements to the right.  Then mirror the two off-center squares into the left side.  The mirror updates as expected if you later change the radius/arc angle.
Arul Suresh
PhD, Mechanical Engineering, Stanford University
• Member, Developers Posts: 223 EDU
The mirror method is robust to changing the number in the pattern, but if the number stays constant, you can also do this, which is a bit easier:

Start with a square at the left edge, remove the horizontal constraint, and constrain it to be oriented with respect to the center. Then pattern 5 elements, and constrain the midpoint of the center element to be vertical to the origin.
Arul Suresh
PhD, Mechanical Engineering, Stanford University

• Member Posts: 66 ✭✭
edited August 2016
If they're all equally spaced you could create the square on the vertical axis and then use the circular pattern tool to create two more squares in the clockwise direction.  Then you could mirror the two created squares along the vertical axis for a total of 5.  I've included an example below.

• Member, Developers Posts: 223 EDU
How's this?

Sketch a square, circular pattern three elements to the right.  Then mirror the two off-center squares into the left side.  The mirror updates as expected if you later change the radius/arc angle.
Arul Suresh
PhD, Mechanical Engineering, Stanford University
• Member, Developers Posts: 223 EDU