SMT Placement Machine With LED Street Lights

SMT placement machine with LED street lights

Production description

It is a placement machine that can produce different kinds of products, like PCB driver circuit boards, all LED lights, including street lights, DOB bulbs, home appliance controllers, and display screens.

At the same time, the smallest component that can be mounted is 0201, and the highest component that can be mounted is 20mm. The speed is also very fast. Under ideal conditions, the production capacity can reach 80000CPH.

Parameter

Sensor function introduction

The functions of various sensors are briefly described below. (1) In the pressure sensor placement machine, including various cylinders and vacuum generators, there are certain requirements for air pressure. When the pressure is lower than the pressure required by the equipment, the machine cannot operate normally. The pressure sensor always monitors the pressure change. Once abnormal, it will alarm in time to remind the operator to deal with it in time. (2) Negative pressure sensor The suction nozzle of the placement machine sucks components by negative pressure, which consists of a negative pressure generator (jet vacuum generator) and a vacuum sensor. If the negative pressure is not enough, it will not be able to absorb the components. When the feeder has no components or the components are stuck in the material bag and cannot be sucked up, the suction nozzle will not be able to absorb the components. These situations will affect the normal operation of the machine. The negative pressure sensor always monitors the change of negative pressure. When the suction or components cannot be sucked, it can alarm in time to remind the operator to replace the feeder or check whether the suction nozzle negative pressure system is blocked. (3) The transmission positioning of the position sensor printed board, including the counting of the PCB, the real-time detection of the movement of the placement head and the table, the movement of the auxiliary mechanism, etc., all have strict requirements on the position, and these positions need to pass various forms of position sensors. to fulfill. (4) The real-time display of the working state of the image sensor placement machine mainly uses CCD image sensors, which can collect various required image signals, including PCB position, device size, and analyze and process by computer to make the placement head. Complete the adjustment and patch work. (5) Laser sensor Laser has been widely used in placement machines, which can help determine the coplanarity of device pins. When the device under test runs to the monitoring position of the laser sensor, the beam emitted by the laser irradiates the IC pin and is reflected to the laser reader. If the length of the reflected beam is the same as the emitted beam, the coplanarity of the device is qualified. When they are not the same, the reflected light beam becomes longer due to the upturn of the pins, and the laser sensor recognizes that the pins of the device are defective. Likewise, the laser sensor can also identify the height of the device, which can shorten the production lead time. (6) Area sensor When the placement machine is working, for the safe operation of the placement head, a sensor is usually installed in the movement area of the placement head, and the photoelectric principle is used to monitor the operating space to prevent damage caused by foreign objects. (7) Component inspection The inspection of components, including the feeding of the feeder and the inspection of the type and accuracy of the components. In the past, it was only used in high-end placement machines, and now it is also widely used in general-purpose placement machines. It can effectively prevent components from being misplaced, misplaced, or not working properly. (8) With the improvement of the patch speed and accuracy, the pressure sensor of the patch head has higher and higher requirements for the "suction and release force" of the patch head to place the components on the PCB. This is the so-called "Z-axis soft Landing function". It is realized by Hall pressure sensor and load characteristic of servo motor. When the component is placed on the PCB, it will be vibrated at the moment, and its vibration force can be transmitted to the control system in time, and then fed back to the placement head through the control of the control system, so as to realize the Z-axis soft landing function. When the patch head with this function is working, it feels smooth and light. If you look further, the depth of the two ends of the component immersed in the solder paste is roughly the same, which is also very beneficial to prevent welding defects such as "tombstone". of. The patch head without a pressure sensor will be misaligned and cause flying.

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