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

New Topic Post Reply
Options
Go to last post Go to first unread
clarkwr1  
#1 Posted : Thursday, July 20, 2017 7:20:13 AM(UTC)
Quote
clarkwr1

Rank: Guest

Joined: 7/19/2017(UTC)
Posts: 3

How do you draw this arc.
File Attachment(s):
arc 1.vcp (286kb) downloaded 19 time(s).
jdi000  
#2 Posted : Thursday, July 20, 2017 7:38:12 AM(UTC)
Quote
jdi000

Rank: Senior Member

Joined: 7/29/2007(UTC)
Posts: 1,559
United States

Was thanked: 37 time(s) in 37 post(s)
Hello

Are you tracing this from a picture or do you have dimensions available?

Regards

Jason
Windows 10, Win 7
clarkwr1  
#3 Posted : Thursday, July 20, 2017 8:09:05 AM(UTC)
Quote
clarkwr1

Rank: Guest

Joined: 7/19/2017(UTC)
Posts: 3

the dimensions don't really matter. Just draw two circles and try to get the tangent arc to go to the outside as depicted.
L. Banasky  
#4 Posted : Thursday, July 20, 2017 12:39:49 PM(UTC)
Quote
L. Banasky

Rank: Senior Member

Joined: 2/16/2007(UTC)
Posts: 343

Thanks: 13 times
Was thanked: 32 time(s) in 28 post(s)
I don't really know an easy way in ViaCad. We need to add tan,tan,radius to the circle menu
for our Wish List. AutoCAD has had it for decades.
For your drawing I would trace and scale a known dimension.
I know this video won't help, but shows tan,tan, radius.

http://www.screencast.com/t/UqK0rJWTCYx

Here's a link to a traced arc.

http://www.screencast.com/t/N6Sg6Fpqp8


Larry

Edited by user Thursday, July 20, 2017 1:14:32 PM(UTC)  | Reason: Not specified

rokoko  
#5 Posted : Thursday, July 20, 2017 1:30:44 PM(UTC)
Quote
rokoko

Rank: Senior Member

Joined: 9/28/2013(UTC)
Posts: 295

Thanks: 3 times
Was thanked: 28 time(s) in 26 post(s)
you can try a solution with one guide line and the three tangent circle tool

finally you can trim the resulting circle

Edited by user Thursday, July 20, 2017 1:38:25 PM(UTC)  | Reason: Not specified

File Attachment(s):
threetangentcircle.vcp (278kb) downloaded 11 time(s).
viacad pro 10 powerpack, viacad pro 9 german, mac os 10.8, 10.9
24c  
#6 Posted : Friday, July 21, 2017 7:04:35 AM(UTC)
Quote
24c

Rank: Guest

Joined: 7/27/2015(UTC)
Posts: 108

Thanks: 5 times
Was thanked: 6 time(s) in 6 post(s)
..or you can use the Tangents Points Arc tool, twice over to do the same.

1. Draw two circles
2. Draw line, at a tangent off one of the circles, or either perpendicular from a radius
3. Use the Tangent arc tool and create an arc that meets virtually at a tangent on the second circle (I'm sure I can set this to snap by altering something in the preferences)

If you're not happy with this, then create a tangent line off the second circle and use the Tangent Points Arc tool to work back to the first one, and it'll be a little closer to a tangential curve.
Admittedly a fudge, and probably not quite precise enough, but it works OK for me.

24c attached the following image(s):
Screen Shot 2017-07-21 at 13.58.42.png
Quick Reply Show Quick Reply
Users browsing this topic
Guest (2)
New Topic Post Reply
Forum Jump  
You can post new topics in this forum.
You can reply to topics in this forum.
You can delete your posts in this forum.
You can edit your posts in this forum.
You cannot create polls in this forum.
You can vote in polls in this forum.