logo
NOTICE:  This is the new PunchCAD forum. You should have received an email with your new password around August 27, 2014. If you did not, or would like it reset, simply use the Lost Password feature, and enter Answer as the security answer.
Welcome Guest! To enable all features please Login or Register.

Notification

Icon
Error
Inscribed irregular pentagon - newbie query - To work out pcd of circle for a series of bolt holes
Options
Go to last post Go to first unread
Previous Topic Next Topic
berniesummers  
#1 Posted : Friday, February 5, 2016 6:33:10 PM(UTC)
berniesummers

Rank: Guest

Joined: 12/31/2015(UTC)
Posts: 4
I'm trying to determine the pcd of a circular series of 5 bolt holes irregularly spaced on a casting. I've measured the distance between adjacent bolt holes & want to draw them up to work out the pcd of the bolts. How can I do it? - ViaCAD 2D 3D V9
Thanks, Bernie
Back to top
murray  
#2 Posted : Friday, February 5, 2016 8:42:05 PM(UTC)
murray

Rank: Senior Member

Joined: 9/24/2014(UTC)
Posts: 373
Australia

Thanks: 8 times
Was thanked: 104 time(s) in 85 post(s)
You say "irregularly spaced" which I'm assuming to mean at irregular angles on the same pitch circle. If that's so, three point circle through any three centres will do it.
Back to top
berniesummers  
#3 Posted : Saturday, February 6, 2016 2:15:43 AM(UTC)
berniesummers

Rank: Guest

Joined: 12/31/2015(UTC)
Posts: 4
Thanks Murray but how do I set the 3 points? I have 3 measurements and can draw the lines between them but how do I position them?
Back to top
berniesummers  
#4 Posted : Saturday, February 6, 2016 3:34:20 AM(UTC)
berniesummers

Rank: Guest

Joined: 12/31/2015(UTC)
Posts: 4
Originally Posted by: berniesummers Go to Quoted Post
Thanks Murray but how do I set the 3 points? I have 3 measurements and can draw the lines between them but how do I position them?


What I mean is - how can I position the 3 points so they are all at the measured distances from each other; before I create the 3 point circle?
Back to top
murray  
#5 Posted : Saturday, February 6, 2016 2:10:19 PM(UTC)
murray

Rank: Senior Member

Joined: 9/24/2014(UTC)
Posts: 373
Australia

Thanks: 8 times
Was thanked: 104 time(s) in 85 post(s)
Draw a line with the distance between two holes that have a third between them. Draw circles with radius the distance between outside and middle hole centres, the intersection is on the pitch circle. Those three will give you the pitch circle centre. Use the same two-circle routine to find the remaining holes' centres.
murray attached the following image(s):
layout.JPG (34kb) downloaded 13 time(s).

You cannot view/download attachments. Try to login or register.
Back to top
berniesummers  
#6 Posted : Saturday, February 6, 2016 6:28:12 PM(UTC)
berniesummers

Rank: Guest

Joined: 12/31/2015(UTC)
Posts: 4
Woo hoo!! That did it. Many thanks Murray.
Back to top
Users browsing this topic
Guest (2)
Forum Jump  
You cannot post new topics in this forum.
You cannot reply to topics in this forum.
You cannot delete your posts in this forum.
You cannot edit your posts in this forum.
You cannot create polls in this forum.
You cannot vote in polls in this forum.

Powered by YAF.NET 2.1.2 | YAF.NET © 2003-2024, Yet Another Forum.NET