M
M
M
E
E
E
R
R
R
C
C
C
U
U
U
R
R
R
Y
Y
Y
U
U
U
S
S
S
E
E
E
R
R
R
M
M
M
A
A
A
N
N
N
U
U
U
A
A
A
L
L
L
8
screws. For a better ventilation and safe purpose, this special design is to prevent the
back door being opened without notice during operating. However, you have to use
magnetic devices to short the connector of the magnetic switches on both side of the
front door while opening for engraving extremely long work-piece. When doing so, make
sure that you wear safety goggles to operate the machine.