tlawson Posted March 2, 2008 Share Posted March 2, 2008 Hi to all I am trying to stretch a frame with diagonal braces while maintaining their parallel distance (file attached). Can anyone help??? Using AutoCAD 2008 Stretch Frame.dwg Quote Link to comment Share on other sites More sharing options...
GE13579 Posted March 3, 2008 Share Posted March 3, 2008 Can you save the drawing down to '06 please I'm interested in having a look?.. Quote Link to comment Share on other sites More sharing options...
chrisdarmanin Posted March 3, 2008 Share Posted March 3, 2008 hmm... i think you can achieve that with chaining... not sure though... i'll give it a try Quote Link to comment Share on other sites More sharing options...
chrisdarmanin Posted March 3, 2008 Share Posted March 3, 2008 here you go GE13579 Stretch Frame.dwg Quote Link to comment Share on other sites More sharing options...
GE13579 Posted March 3, 2008 Share Posted March 3, 2008 Thanks Chris! Just trying to work out what is required? A simple stretch in the x direction? Or a mirror type of stretch? Or am I way off track?? Quote Link to comment Share on other sites More sharing options...
chrisdarmanin Posted March 3, 2008 Share Posted March 3, 2008 the problem i think is that when he stretches along the x axis the width of those 2 crossing beams (or whatever they are) gets thinner. that's why there is that magenta circle in the middle. its diameter is 50. Quote Link to comment Share on other sites More sharing options...
GE13579 Posted March 3, 2008 Share Posted March 3, 2008 Will the horizontal beams then move in the Y direction like a scissor lift? I think this is a little bit beyond my basic understanding of dynamic blocks, but I'll be interested to hear a step by step solution?.. Quote Link to comment Share on other sites More sharing options...
dbroada Posted March 3, 2008 Share Posted March 3, 2008 I have to admit to having trouble with this but mostly because I don't know how I would do it in autocad. The stretching part is easy but keeping the arms a set distance is beyond me at present. If I was drawing it from scratch I would construct the arms to be either trimmed or extended to size and wouldn't try to modify an existing item. Quote Link to comment Share on other sites More sharing options...
tlawson Posted March 3, 2008 Author Share Posted March 3, 2008 Nice response so far guys. Chris seems to have a good understanding of what I need. I can stretch the top and bottom rail of the frame with a linear stretch and can stretch one diagonal line with a polar stretch but to stretch all 4 diagonals (with my limited knowledge) I would need 4 polar stretches. I am hoping it is possible to chain some of these actions together. Drawing this manually I use my snaps (tangent to pass the circle) (tangent intersection to connect to the top or bottom rail) Quote Link to comment Share on other sites More sharing options...
tlawson Posted March 9, 2008 Author Share Posted March 9, 2008 Not ideal but this does work using 3 grips and some tidying up with the trim command. 1. Stretch the frame with the top linear grip (range is set at 400-2000mm) 2. Next click a grip located at one end of a diagonal, drag the grip and snap it to the RED line. 3. Repeat for the other diagonal I hope this will give someone a few ideas. Can anyone improve on this???? Stretch Frame V2.dwg Quote Link to comment Share on other sites More sharing options...
AutoNewbie Posted March 10, 2008 Share Posted March 10, 2008 Like this? Use the right arrow to stretch the entire frame with the cross braces staying attached and parallel. Corrected Sissor.dwg Quote Link to comment Share on other sites More sharing options...
tlawson Posted March 10, 2008 Author Share Posted March 10, 2008 Thanks for having a look but just using a linear stretch does not work. The diagonal bracing is set 50mm apart. This needs to remain constant. The further you stretch the frame in the X axis the closer the diagonals become to each other. Quote Link to comment Share on other sites More sharing options...
AutoNewbie Posted March 10, 2008 Share Posted March 10, 2008 Ahh, I see. The Cross braces need to maintain thier width...I knew it couldn't be that simple.. Quote Link to comment Share on other sites More sharing options...
5arahm Posted October 29, 2008 Share Posted October 29, 2008 Just a suggestion, have you tried making a block out of a frame? Then using block editor to apply a stretch frame across the side you want to stretch across? This turns it into a dynamic block, which you may not be looking for but it works keeping everything parallel. on the attachment ive done this. Stretch%20Frame[1].dwg Quote Link to comment Share on other sites More sharing options...
dbroada Posted October 29, 2008 Share Posted October 29, 2008 your attachment repeats the original problem. If you stretch it a long way you can see that the width of the X bars narrows. Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.