I’ve put this in the “new wisdom” category, which may well be more a reflection of my ego than the true “new wisdom” of this post.
However, here goes.
Recently, I had a job that was about 26" in X, but 54" in Y. VCarve accommodates this quite simply by having a “tiling” feature. I won’t go into the details of how to use that feature as there are many videos available. However, I ran up against an issue with it owing to the way that I have set up my spoil board. My spoil board covers the 30" or so in X that the Mill can carve. In Y, the slats that make up my spoil board are about 36" long. (There was no magic to that length. It simply worked out from the MDF offcuts that I had.) I have t-tracks between the slats.
I surfaced the spoil board to the extents in X and Y that the Mill can handle. This meant, in Y, that I surfaced all the way to the front edge of the board, but was short of the back ends of the slats by about 6". For any piece of material that is short of 30", this is not an issue. However, for this tiled project, it meant that the back end of the material rested on the part of the spoil board that was not surfaced. As anyone reading this will understand, this threw off the depth of my Z cuts since I was, in effect, cutting on an inclined surface. Thankfully, I realized this before I actually carved the piece.
The solution was simple, if a pain in the neck. I had to remove all the slats that make up my spoil board and cut them to the length that the Mill can surface. The tiling job ran fine.
I am putting this out there only as a precautionary tale for other Mill users who may be using material that is larger than the Mill can surface. The project does not need to be a tiling project for this issue to arise. If you have a project whose dimensions the Mill can carve - say 20 x 20 for example - but you are carving it into the centre of a piece of material that is larger than the surfaced area of your spoil board, you will have to address this issue. The obvious solution is to limit your spoil board’s dimensions to those that the Mill can carve. There may be other solutions. I’ve not been able to come up with any.