This is a technique I use to align anodes to the members of oil platform jackets. A lot of the time the members of a jacket are sloping at funny angles so the align tool won't be much use and the Normal Align tool is a bit too fiddley and not accurate enough.
|The orange cylinder's bounding box is aligned to the world which makes it difficult to align the red box to it's surface.|
|Make sure 'AutoGrid' is ticked and create a box that sits on the end of the cylinder, it doesn't mater what size it is. Then set the coordinate system to 'Local' and use the align tool to center the box to the cylinder on the X and Y axis.|
|Convert the box into a poly object, then use attach to attach the cylinder to the box. The cylinder is now part of the box object and will inherit the co-ordinates from the box which was perfectly aligned to the original cylinder.|
|Go to the element sub-object mode and delete the box. You now have a cylinder with a correctly aligned bounding box.|
it's a fairly easy job to align the anode box to the cylinder. Make sure
that the coordinate system is set to local and use the align tool to align
the anode to the cylinder.
Step 2 Center the anode on the Y axis, click 'Apply'
Step 3 Align the anode along the X axis using max and min, this will put the anode on the surface of the cylinder. Click 'OK'
Note: You may be working with different axis depending on the orientation of your objects.
we need to rotate the anode around the center line of the cylinder.