robrodd Posted February 24, 2011 Share Posted February 24, 2011 why does my triangle twist when i attempt to sweep it along the helix to cut a thread???? Quote Link to comment Share on other sites More sharing options...
Sittingbull Posted February 24, 2011 Share Posted February 24, 2011 did you check the twist option? Select objects to sweep or [MOde]:Select sweep path or [Alignment/Base point/Scale/Twist]: twist Enter twist angle or allow banking for a non-planar sweep path [bank/EXpression]: Quote Link to comment Share on other sites More sharing options...
robrodd Posted February 25, 2011 Author Share Posted February 25, 2011 must i put a twist in it? i've selected yes for the alignment option and base point is the top of the triangle. the turn height is 1.5001 and the isoceles triangle has sides of 1.5. don't know what i'm missing! Quote Link to comment Share on other sites More sharing options...
robrodd Posted February 25, 2011 Author Share Posted February 25, 2011 here's an isometric of it Quote Link to comment Share on other sites More sharing options...
Sittingbull Posted February 25, 2011 Share Posted February 25, 2011 (edited) I don't think the twist is what's bothering you, but maybe the bank option. What options are you getting at the command prompt? Something like this: Select objects to sweep or [MOde]:Select sweep path or [Alignment/Base point/Scale/Twist]: twist Enter twist angle or allow banking for a non-planar sweep path [bank/EXpression]: or something like that: Select objects to sweep or [MOde]:Select sweep path or [Alignment/Base point/Scale/Twist]: twist Enter twist angle or allow banking for a non-planar sweep path [bank/EXpression]: Could you eventualy upload the file, please? Regards, SB Edited February 25, 2011 by Sittingbull quote Quote Link to comment Share on other sites More sharing options...
robrodd Posted February 25, 2011 Author Share Posted February 25, 2011 here it is Screw2.dwg Quote Link to comment Share on other sites More sharing options...
Sittingbull Posted February 25, 2011 Share Posted February 25, 2011 (edited) Like i said, it's the banking. Select sweep path or [Alignment/Base point/Scale/Twist]: twistEnter twist angle or allow banking for a non-planar sweep path [bank/EXpression]: Edited February 25, 2011 by Sittingbull pict Quote Link to comment Share on other sites More sharing options...
Organic Posted February 25, 2011 Share Posted February 25, 2011 Why the twist in it? Quote Link to comment Share on other sites More sharing options...
Sittingbull Posted February 25, 2011 Share Posted February 25, 2011 Why the twist in it? To get to the banking option part? Quote Link to comment Share on other sites More sharing options...
robrodd Posted February 25, 2011 Author Share Posted February 25, 2011 what do i set the banking angle to or do i sweep in different plane? Quote Link to comment Share on other sites More sharing options...
Sittingbull Posted February 25, 2011 Share Posted February 25, 2011 ... Command: sweepCurrent wire frame density: ISOLINES=4, Closed profiles creation mode = Solid Select objects to sweep or [MOde]: 1 found Select objects to sweep or [MOde]: Select sweep path or [Alignment/Base point/Scale/Twist]: t Enter twist angle or allow banking for a non-planar sweep path [bank/EXpression]: 0 Select sweep path or [Alignment/Base point/Scale/Twist]: What is not clear here? Quote Link to comment Share on other sites More sharing options...
ReMark Posted February 25, 2011 Share Posted February 25, 2011 Did you try setting it to "0"? Quote Link to comment Share on other sites More sharing options...
robrodd Posted February 25, 2011 Author Share Posted February 25, 2011 sorry, only read your response properly now.... i set me banking / twisting angle to 0, but it still twists Quote Link to comment Share on other sites More sharing options...
ReMark Posted February 25, 2011 Share Posted February 25, 2011 That's OK. Try this experiment. Scale the triangle you want to extrude using a scale factor of 99% then extrude it. Does it still twist? Just curious. Quote Link to comment Share on other sites More sharing options...
Sittingbull Posted February 25, 2011 Share Posted February 25, 2011 (edited) I managed to do it with your file though. As the the turn height is 1.5001 and the isoceles triangle has sides of 1.5, it does the trick. I wonder what parameter would make that triangle twist. Can you make a screenshot of the shape you're getting? Or use jpgout. Regards, SB Edit: Ooooops... My bad, it does twist actualy...$ Back to the drawing board... Edited February 25, 2011 by Sittingbull Dang Quote Link to comment Share on other sites More sharing options...
Sittingbull Posted February 25, 2011 Share Posted February 25, 2011 Ok, finaly got it. It's not realy twisting, see. It 's only rotated on 90°. You have to realign it on the same ucs than the helix. Sorry if i got u confused. Regards, SB Quote Link to comment Share on other sites More sharing options...
robrodd Posted February 25, 2011 Author Share Posted February 25, 2011 you've still got me confused... i'm not getting this... it's gone over my head so many times, i'm going bald! Quote Link to comment Share on other sites More sharing options...
robrodd Posted February 25, 2011 Author Share Posted February 25, 2011 i notice you guys are using autocad 2011, i'm using 2007. has that not got something to do with it? Quote Link to comment Share on other sites More sharing options...
robrodd Posted February 25, 2011 Author Share Posted February 25, 2011 remark as far as i know, one can only extrude in one plane, not multi-planes Quote Link to comment Share on other sites More sharing options...
ReMark Posted February 25, 2011 Share Posted February 25, 2011 You can EXTRUDE along a helix using the path option. Here's an example. Quote Link to comment Share on other sites More sharing options...
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