I have a work piece that is 2 inches thick (I understand that 5 inches is the maximum thickness). Actually the piece is only 1 inch, but I mounted it on a sled, as it is small and I'm experimenting with carving smaller plaques.

When the project is going through its startup checks, the z-truck goes over to the right and attempts to lower itself and find the sliding plate. It dips down several times and always stops short about 1/4 inch.The error "Ensure Sliding Plate set" appears and I cannot proceed.



The sliding plate is in position. Also I am using the standard 1/16" carving bit with the CarveTight spindle. I am only attempting to carve 1/4 inch into the surface of the piece.



I saw a post from a year ago that says I may need the longer bits. I hope this is not the case - I'm not carving that deep. From what I can surmise, this is just a matter of the machine trying to calibrate itself.
Suggestions? (I know about gluing side rails to pieces to minimize depth but that has other drawbacks).