How to make a smooth mesh Im making a twisted iron bar. I have added array modifier and with the help of empty i have twisted. After adding array modifier the edges been seen. How can i remove that edges of the array to look a continious mesh. After adding the sub division modifier the mesh look odd. How can i make a smooth mesh and plz suggest me is this method right or can i go with other method
You need to delete all faces that are going to be hidden by the Array modifier (selected on the screenshot, delete them on both sides of the object). Then enable the "merge" option in the modifier settings.

Normally, this is the way I'd be going for. Sadly, I can't tell you why the subsurf modifier messes up in this mesh. But if you put a fairly high Crease amount on most of the edges (except those that should be smoothed) it works fine.

If you are looking from your object from a distance, the Edge split modifier will do the trick. If you have some spare render time, go for a Subsurf and eventually then a Bevel modifier.