Close Cover Error. . .
how do i find out what is causing this problem ?????

i haven't carved anything in a couple years.
i did a test carve and fixed a bunch of stuff.
i did three test carves this morning, every thing was fine.
I get ready to do my project and find the little o ring is missing. off the the store to get a couple o rings. . . .
do another test carve, every thing is fine.
put my board in for my project . . board a hair too short . .
fix board length in software . . .
go back to machine, didn't make board short enough . .
back to the software, make board shorter and adjust project to fit.
back to machine . . .
measuring board . . .
CLOSE COVER PLEASE !!!!
son of a B#*%@ !