Narrowest wood you can use in a CNC?

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I don't use Carbon Create but in Fusion 360 you can set any size stock. I would imagine it to be the same in CC. However, if your hole is to be centered then the width of the stock is really not relevant as long as you set your XY zero on the center of the stock. Or if the hole is not centered then set your XY zero centered based on one edge of the stock.

David

Welcome to the Router Forums. The software needs all 3 dimensions of your stock, thickness, width, and length. You are the one that tells the software how the blank will be located on the bed of the CNC so you thickness would be the 1 1/4" and the width would be the 3/4". Length would be 12"

I'm not sure where you are getting the default measurment from.

I've got a friend that engraves text on chopsticks, so it is not a limitation of the CNC or g-code. It may be a limitation of carbide create.

I have a Shapeoko XXL and from what I understand what you are asking it may be that in Carbide Create the default for the setup is incorrect. After opening Carbide Create and get the file open go to the upper left side and there is a Gear icon. That is the job set up and check you dimensions there. When creating toolpaths there is a default cut depth and that may also be your problem. When you edit a tool path check for the cut depth. A Shapeoko can cut up to 4 inches in Z direction. It is hard to actually cut to 4" due to the tool length and other limiting factors for a Shapeoko. A 1.5" depth is more reasonable but other depths are possible with specialized setups.

If you are not already on the Carbide 3d Forum I would highly suggest you go there and register. They have some very knowledgeable people and they are all ready to help. This forum is very good but the Shapeoko knowledge if limited.