Impact System Dynamic Characteristics of Hydraulic Rock Drill Based on an Overlapped Reversing Valve

Table 3

Signal amplifier zero setting.

Number	Test item	Zero adjustment	Acquisition channel
1	Front chamber	0.001	C2
2	Rear chamber	−0.005	C3
3	Left valve chamber	−0.008	C4
4	Right valve chamber	−0.002	C1