Discussion forum

Message Topic Search Topic Options Post Reply Create New Topic Printable Version Translate Topic

    Hello,

I  am having some difficulty  aligning  a soild like for example   the four legs  of a chair  to top of a circular table  to a particular point..  I have no problem  aligning  a box on top of another box.  I  tried using 3d align command ( where the first selections are made to the sources object)  and also the Align command ( where the  selections are source / destinantion  and so on). The  problem I am getting with the  chair legs  is that  I dont have a  point ( destination pt) to snap on to .So I tried the quadrants  of the table with no luck.  When I  Use the 3dAlign and do the selection on the chair legs, I find the the chair rotates through  90 degrees, for no apparent reason, before it  snaps on to the  base point quadrant of the table. Where am I going wrong. ?  The table top face is on XY Plane with legs on Z axis facing the floor  but the Chair I have it inverted ( so I can see the   the  points on the legs to snap to) . Is there a general rule   such as how UCS should be to align  objects ???

Author	Message Topic Search Topic Options Post Reply Create New Topic Printable Version Translate Topic
Joferna Members Profile Send Private Message Find Members Posts Add to Buddy List Groupie Joined: 08.Nov.2010 Location: Canada Using: Autocad 2008 Status: Offline Points: 29	Topic: aligning 3D solid Posted: 25.Jun.2011 at 06:21
	Hello, I am having some difficulty aligning a soild like for example the four legs of a chair to top of a circular table to a particular point.. I have no problem aligning a box on top of another box. I tried using 3d align command ( where the first selections are made to the sources object) and also the Align command ( where the selections are source / destinantion and so on). The problem I am getting with the chair legs is that I dont have a point ( destination pt) to snap on to .So I tried the quadrants of the table with no luck. When I Use the 3dAlign and do the selection on the chair legs, I find the the chair rotates through 90 degrees, for no apparent reason, before it snaps on to the base point quadrant of the table. Where am I going wrong. ? The table top face is on XY Plane with legs on Z axis facing the floor but the Chair I have it inverted ( so I can see the the points on the legs to snap to) . Is there a general rule such as how UCS should be to align objects ???

John Connor Members Profile Send Private Message Find Members Posts Add to Buddy List Senior Member Joined: 01.Feb.2011 Location: United States Using: AutoCAD 2018 Status: Offline Points: 7175	Posted: 25.Jun.2011 at 13:26
	You could cheat and use some 2D geometry to get the table top and legs in the correct position (X/Y) then move the table top in the Z direction the required height. Not an elegant way to do it but it does work.
	"Humans have a strength that cannot be measured. This is John Connor. If you are reading this, you are the resistance." <<AutoCAD 2015>>

Joferna Members Profile Send Private Message Find Members Posts Add to Buddy List Groupie Joined: 08.Nov.2010 Location: Canada Using: Autocad 2008 Status: Offline Points: 29	Posted: 25.Jun.2011 at 17:56
	Thanks John, I suppose this is the way to " wing it "

John Connor Members Profile Send Private Message Find Members Posts Add to Buddy List Senior Member Joined: 01.Feb.2011 Location: United States Using: AutoCAD 2018 Status: Offline Points: 7175	Posted: 25.Jun.2011 at 21:39
	Post the drawing so someone here can take a look at it and maybe figure out what's happening.
	"Humans have a strength that cannot be measured. This is John Connor. If you are reading this, you are the resistance." <<AutoCAD 2015>>

Joferna Members Profile Send Private Message Find Members Posts Add to Buddy List Groupie Joined: 08.Nov.2010 Location: Canada Using: Autocad 2008 Status: Offline Points: 29	Posted: 05.Jul.2011 at 07:31
	My problem initially was when I align , my points snapped on to the wrong soource and destination points. I have now figured it out the way I could get the correct snapping points - is to have 2 or 4 viewports of the objects and move them closer and by using as you say 2d commands manually bring them to gether or get the correct snapping points to align them. Any way thanks John once again for getting my grey cells working

Discussion forum

?CAD discussions, advices, exchange of experience

aligning 3D solid

?
CAD discussions, advices, exchange of experience