I'm making a robot and that is the arm: Arm

When i try to add a vertex with Ctrl+R and scale down, that happens:

Arm 2

What can I do so these vertex join all edges?

  • $\begingroup$ Can you please clarify your question. Firs off you have 4 vertices selected in every screen shot. So do you want to work with only one or all 4? What do you want to join the edges to? What did you want the scaling to do? $\endgroup$
    – David
    Dec 27, 2016 at 4:24
  • $\begingroup$ You have duplicate faces and when you cut you are only cutting one set of quads. Erase the surplus faces. $\endgroup$ Dec 27, 2016 at 4:37

1 Answer 1


It appears to be a duplicate vertices/faces issue. Basically, there are two (or more) vertices where there should be one, creating unwanted geometry.

This is the problem:

enter image description here enter image description here

The simplest solution is to select all of the vertices and to use the Remove Doubles option to automatically remove the overlapping geometry as show below:

enter image description here


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