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
Tangent Point Circle tool alternate solution
Options
Go to last post Go to first unread
Previous Topic Next Topic
Art Smith  
#1 Posted : Thursday, March 1, 2018 1:10:51 PM(UTC)
Art Smith

Rank: Senior Member

Joined: 1/16/2015(UTC)
Posts: 351

Thanks: 49 times
Was thanked: 43 time(s) in 30 post(s)
how do I force the "Tangent Point Circle" tool to provide the alternate solution? without regard to where I select the two circles, the "Tangent Point Circle" tool provides the same solution................

Art
[email protected]
Art Smith attached the following image(s):
tangent point circle tool question.jpg (40kb) downloaded 9 time(s).

You cannot view/download attachments. Try to login or register.
Back to top
rockyroad_us  
#2 Posted : Thursday, March 1, 2018 2:47:11 PM(UTC)
rockyroad_us

Rank: Senior Member

Joined: 9/12/2009(UTC)
Posts: 600
Man
United States
Location: In my place

Was thanked: 52 time(s) in 46 post(s)
Wit the three tangent circle command, you can do it but you need a vertical line away from circle 1 and 2 in the region of the big circle away from the dashed circle. It will give tangents to both small circles. I suppose you need to explore how big you need that dash circle by moving the vertical line to adjust.
FX 7-FXPro14-1650
MacPro 11.7.4
2x2.8GHz Quad Xeon 32GB
NVIDIA 4 K5000 4GB
Work
Back to top
WWW
rokoko  
#3 Posted : Thursday, March 1, 2018 2:57:58 PM(UTC)
rokoko

Rank: Senior Member

Joined: 9/28/2013(UTC)
Posts: 345

Thanks: 4 times
Was thanked: 57 time(s) in 45 post(s)
three point circle tool will do the job. hold down option key while picking the tangent points of circle #1 and circle #2. finish with an 3rd click. later you can change the diameter (the tangent points will stay aligned)
viacad pro 10 powerpackpro, viacad pro 9 german, mac
Back to top
thanks 1 user thanked rokoko for this useful post.
Art Smith on 3/4/2018(UTC)
Art Smith  
#4 Posted : Thursday, March 1, 2018 3:33:00 PM(UTC)
Art Smith

Rank: Senior Member

Joined: 1/16/2015(UTC)
Posts: 351

Thanks: 49 times
Was thanked: 43 time(s) in 30 post(s)
looking for the explicit solution versus a very good "trial & error" solution. I can get it close with "trial & error" but the answer is destined for a tool path.....

what is the Windows equivalent for the Mac's "option key" ??

the exact solution I'm looking for is the circle whose center is on the second line AND that's tangent to both of the given circles! if the "Tangent Point Circle" tool would cooperate, a spline curve could be used to connect a number of centers of circles with difference diameters. the intersection of spline curve and the second straight line should be the answer. this is one of those constructions I don't remember running into in Descriptive Geometry ........

Art
[email protected]
Back to top
Art Smith  
#5 Posted : Thursday, March 1, 2018 7:26:30 PM(UTC)
Art Smith

Rank: Senior Member

Joined: 1/16/2015(UTC)
Posts: 351

Thanks: 49 times
Was thanked: 43 time(s) in 30 post(s)
workable answer in hand, still interested on how to get "Tangent Point Circle" to cooperate!!

Art
[email protected]
Art Smith attached the following image(s):
tangent point circle tool question 2.jpg (61kb) downloaded 11 time(s).

You cannot view/download attachments. Try to login or register.
Back to top
murray  
#6 Posted : Saturday, March 3, 2018 1:36:54 AM(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)
This is the geometric solution if you know the diameter of the circle you want to draw. I don't know how to relate it to the tangent point circle tool.

Edited by user Saturday, March 3, 2018 1:38:49 AM(UTC)  | Reason: Not specified

murray attached the following image(s):
tangential but incidental.PNG (44kb) downloaded 8 time(s).

You cannot view/download attachments. Try to login or register.
Back to top
Art Smith  
#7 Posted : Saturday, March 3, 2018 12:14:40 PM(UTC)
Art Smith

Rank: Senior Member

Joined: 1/16/2015(UTC)
Posts: 351

Thanks: 49 times
Was thanked: 43 time(s) in 30 post(s)
Murray-

thanks! as it turns out R3 is not known... but your solution/approach could be used as a means to plot a range of centers for fitting with a spline curve to find the unknown radius whose center in on the second line; essentially a descriptive geometry substitution for "Tangent Point Circle"

Art
[email protected]
Back to top
murray  
#8 Posted : Sunday, March 4, 2018 6:12:48 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)
Rokoko is right, rather nice actually. ctrl is windows option key.
Back to top
Art Smith  
#9 Posted : Sunday, March 4, 2018 7:44:15 PM(UTC)
Art Smith

Rank: Senior Member

Joined: 1/16/2015(UTC)
Posts: 351

Thanks: 49 times
Was thanked: 43 time(s) in 30 post(s)
rokoko Posted: 3 days ago

three point circle tool will do the job. hold down option key while picking the tangent points of circle #1 and circle #2. finish with an 3rd click. later you can change the diameter (the tangent points will stay aligned

murray Posted: about an hour ago

Rokoko is right, rather nice actually. ctrl is windows option key.


"Three Tangent Circle" isn't working for me....... I've tried selecting the first and second curves with "ctrl" also pressed and a 3rd click with and without "ctrl" pressed to no avail; SharkCAD Pro waits for me to select a third curve................. is there something special about where the 3rd click is done??

Art
[email protected]
Back to top
murray  
#10 Posted : Sunday, March 4, 2018 7:58:25 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)
Not three tangent, three POINT circle, hold ctrl to snap to tangents of the initial two circles, random LMB click for the arbitrary size. As Rokoko said, when you resize, it follows the tangents, until you release selection focus. Nice.

Edited by user Sunday, March 4, 2018 8:13:15 PM(UTC)  | Reason: Not specified
Back to top
thanks 1 user thanked murray for this useful post.
Art Smith on 3/4/2018(UTC)
murray  
#11 Posted : Monday, March 5, 2018 6:24:50 AM(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)
But, looking over the thread and what your exact requirement is, the answer is to mirror either of the two circles across the line and use the three tangent circle.
Back to top
thanks 1 user thanked murray for this useful post.
Art Smith on 3/5/2018(UTC)
Art Smith  
#12 Posted : Monday, March 5, 2018 9:31:45 AM(UTC)
Art Smith

Rank: Senior Member

Joined: 1/16/2015(UTC)
Posts: 351

Thanks: 49 times
Was thanked: 43 time(s) in 30 post(s)
Murray-

outstanding, that's exactly what I was looking for and couldn't see!!! thanks

Art
[email protected]
Back to top
Users browsing this topic
Guest
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