Can not cut through the object to be cut

1.Possible cause analysis of failure:
a.Aging of laser tube.
b.Contamination of focusing mirror.
c.Light path is not right.
d.The focusing lens is contaminated.
e.The mirror is contaminated.
f.Power output is not reasonable.
g.Speed is too fast.
h.The cut object is too thick.

a.Replace the laser tube.
b.Clean the focusing mirror.
c.Clean the reflector mirror.
d.Adjust the light path.
e.Adjust the power and speed.