The method of linear aiming is researched and improved, by which, the positioning accuracy can be reached to 0.1 pixel interval and straight line in any position can be measured.
研究和改进了直线瞄准的方法，直线的定位精度可以达到0.1像素间距，并且可以测量任意位置的直线。
2
The bonding pad of the circuit board is provided with the gap, the gap and the positioning hole are spaced by certain interval to avoid tin leaking.
在电路板的焊盘上开设缺口，该缺口与定位孔相距一定间隔，可避免出现漏锡。
3
This paper mainly introduces the computation of time interval of pulse delay in the design of pulse positioning of rise and fall frequency of step motor with microcomputer control.