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It is not possible for the bit to damage the rubber belts. The Y/Z truck only moves laterally over the open space between the belts. Just make sure the project stays under the rollers (7 inch rule).

They are really not that difficult to make. Dan did a good job explaining how in the instructions and making your own will give you a tremendous advantage on how it works.

Dan,
If the board is lifting slightly as the rollers leave the board, wouldn't that leave a horizontal line or depression?

EDIT: Maybe adjusting the infeed and outfeed tables would help.

I was referring to the rails on the Z truck and the Y rails on the machine. If there is a wood chip or debris stuck to one of the Y rails it could cause the problem. I would check the bearings also.

If the board was moving in the jig or the jig was moving the lines would not be even. The ridges in the pic appear to be following the grain. Did you check for a loose Z or Y bearing? Or maybe dirty...

Oops! I don't recall the machine asking for a board thickness.

I had a couple of problems like that too. I discovered that the board height above the carrier sides needs to be EXACTLY 1/8". However, this may be due to my specific machine tolerances. Also, I...

I suggest that you download the project as a trial. In the .zip file is a .pdf file that contains very good explanations of everything.

Dan,

Actually, I'm not having any problems now that I have made the touch hole a little larger but, your suggestion may make the jig even more useful so I'm willing to give it a try.

I just...

The only issue I had was when trying to jog to the line the machine would stop about 1/8" from the line and would not advance any further. Probably because the roller dropped. Consequently, the touch...

Dan,

Well, I finally finished the UCB. As I stated earlier, I made mine out of 5/8" Oak and the results are stellar. The documentation is pretty good and easy to follow and I had very little...

Dan,

I just bought the project from the Pattern Depot and I have been reviewing the instructions. It looks fairly straight forward and I plan to build mine out of Oak tomorrow. In the notes for...