Originally Posted by
DickB
Al,
Can you give an example of where this has happened? I use constraints extensively on my projects, and have never had this happen, including with cribbage boards.
While it's true that you can set an attachment relative to the edge of the board, it doesn't necessary follow that the machine code generated will actually measure from that edge for that object. I have, like I'm sure you have, often watched the machine running. The only time the machine finds the board edges are at startup. In fact, in some cases (with a long board or sled), the machine never finds the right end of the board. So, how could the machine be placing an object from that undetected edge of the board if I placed an attachment to that edge? Let's say I placed a Drill hole midway on the length of a project board and attach it 1" from the bottom of the board. Would not the machine have to find the far edge of the board (looking at the board in the machine) at the midway location if what you said takes place? I have never observed that.
I don't think that the use of constraints or attachments has any impact on the generated machine code. I think that as long as all Designer objects are placed in the same location, the generated machine code is the same. In other words, if you add or remove a constraint or attachment without changing the layout, the generated machine code is the same.
(BTW the Designer term is "constraint" not "restraint" - just saying to avoid confusion.)