Table 1.

Three levels of cutting parameters.

Variable	Symbol	Unit	−2	−1	0	+1	+2
Scanning speed	S	mm/s	1	4	7	10	13
Laser power	P	W	20	25	30	35	40
Focal plane position	FPP	mm	−3.2	−1.6	0	1.6	3.2