Long board machining

[rwebcon]

I have a project which requires cutting/engraving a 7' and 6" board.  I'm looking for ideas on how to go about this on my 24" by 36" bed.

For sure I will need to reposition 3 time and it must be accurate.

I have some ideas but want some input to see if I'm on the right track.

[stevem]

In V Carve, there is a tiling feature so all you need to do is have a good straight line in the Y axis that you can reference your piece on.
Make a mark on the line so when you slide the piece to the back, it will be aligned with the mark.
I saw a guy do a 5' sign with the tiling feature and he had one of the tiles go thru a letter on the sign and you couldn't see where it started or stopped.
It was perfect. If your piece is going to be 6" wide, you could even mount a guide on both sides of the piece so alignment won't be a problem.
Vectric site has info on this process. Just type tiling and you will see all kinds of posts. There is also a tutorial on this feature in there help section.

[Deleted]

I've addressed how to do tiling in multiple posts but since this is a current question in another thread I'll point there and give a detailed answer.

axiomprecision.proboards.com/thread/349/3-4-project-on-cnc?page=1&scrollTo=1810

[jimpa]

I recently watched a video (different CNC vendor focus, but the technique should be valid for most machines) where the operator programmed in some index holes for both the spoil board and for the edges of the workpiece so that it could be relocated exactly for each tile operation on a long workpiece. The operator was demonstrating a job where the workpiece was several feel longer than the cutting window of the machine he was using.

[savannahdan]

I use index marks on the waste board and cut table to help with aligning the tiling project. Last project was a 5.5"x37" 1/8" thick design for a customer who had measured where they wanted it to go and didn't read their tape measure correctly. She was over by 1". It took around 1hour15minutes per cut. She was needing 17 of these but put the project on hold for budget reasons.