一、零位的调整零位,是指试验机在操作前回油阀关闭、进油阀开启、指针回零,它是在检测材料中避免示值误差的关键。一般造成指针回零不好的原因有:(1)油路系统堵塞或导向滚轮靠大立柱过紧,引起带针,零位变动;(2)摆杆主轴不灵敏;(3)测力活塞的尖角处碰伤;(4)齿杆与铜齿轮的装配关系过紧或过松,或铜齿轮 First, the zero adjustment Zero, refers to the test machine before the operation of the oil return valve is closed, the oil valve open, the pointer back to zero, it is the key to avoid indication error in the test material. The general cause of the pointer back to zero is not good because: (1) blockage of the oil system or steering wheel by a large column is too tight, causing a needle, zero changes; (2) pendulum spindle insensitive; (3) (4) rack and pinion gear assembly is too tight or too loose, or copper gear