第九章单元测试
- The distance setting photoelectric switch is mainly based on trigonometric distance measurement and has two detection modes: BGS and FGS. BGS mode is used to detect the owing and shortage of materials. In this mode, the materials between the sensor and the set distance can be detected, and the background materials beyond the set distance can not be detected, so as to realize the purpose of detecting the workpiece in the transparent plastic pipe.（ ）
- The control program structure of each work unit of YL-335B can be basically divided into two parts: one is the control of system start / stop, including power on initialization, fault detection, system status display, check whether the system is ready and the operation of system start / stop; the second is the step sequence control of process after system startup, which is the main control process of work unit.（ ）
- The main working process of feeding unit is feeding control, which is a single sequence step sequence control process.（ ）
- The working process of installation and debugging of feeding unit is as follows: installation of mechanical parts → connection and adjustment of gas path → circuit wiring → sensor debugging and circuit checking → programming and debugging of PLC.（ ）
- The function of the workpiece pushing device is to push the workpiece at the bottom of the silo onto the discharge table. Working principle of the device: when the workpiece needs to be pushed out to the material table, the piston rod of the ejector cylinder is pushed out to press the lower workpiece; then the piston rod of the pushing cylinder is pushed out to push the lowest workpiece onto the material table. After the pusher cylinder returns to its position, the ejector cylinder returns to release the next lower workpiece. In this way, the next movement of the workpiece is ready for the next time.（ ）
- According to the professional specification requirements of gas connection, the incorrect description is ______________（ ）
- According to the process specification requirements of electrical wiring, the incorrect description is ______________（ ）
A:错 B:对
答案:对
A:错 B:对
A:错 B:对
A:对 B:错
A:对 B:错
A:After the gas path is connected, it shall be bound with binding tape, and the distance between the two binding bands shall not exceed 50 mm.Cables and gas pipes shall be bound separately, but when they are all from the same mobile module, they are allowed to be bound together. B:The first binding tape is 80 mm + / - 5 mm away from the connection of the air pipe connector of the solenoid valve group. C:When connecting, pay attention to the direction of the air pipe, which should be arranged in order, and there is no air pipe in the trunking.The air pipe should be inserted tightly in the quick connector, and there should be no air leakage. D:There is no windpipe winding and binding deformation.
A:When connecting wires, proper cold pressed terminals must be used; when making terminals, do not damage the insulation part of wires. B:There should be at least 10cm allowance in the cable trench (if it is a short wiring, it is not required in the same trunking). C:The insulation part of the cable should be in the trunking.After wiring, the trunking shall be covered, and there shall be no warping or incomplete covering. D:The connecting wire shall have the label in accordance with the requirements; each terminal shall be connected with no more than 3 wires; the metal material of the wire shall not be exposed, and the metal part of the cold pressed terminal shall not be exposed.
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