What factors affect the speed of the placement machine?
Time:2017-07-24 Source:www.joysmt.com
What factors affect the speed of the placement machine?
The movement speed of Samsung's placement machine affects the production speed. Production speed is the most concern of our customers. Today JOY TECHNOLOGY CO.,Limited will analyze the main factors that affect the movement speed of the placement machine? What problems should we pay attention to in the production process?
1) The number of each component on the PCB and the arrangement position on the feeder table. These are two factors that affect each other. For those with a large number of components, it should obviously be placed together to minimize the movement on the feeder table.
2) The movement of the feeder of the placement machine. Because when the feeder is switched from one position to an adjacent position, the loading table can still maintain its maximum speed movement, but when the position of the feeder is switched more than one, the speed of the loading table will be reduced by 30%~50 %, when optimizing the program, the feeding table should be minimized to move back and forth between the two feeding chutes that are far away.
3) The rotation speed of the turret. The turret speed (Head Speed) is set by the programmer in the component library. It determines how fast the turret can move after picking up this component. Head Speed depends on the size of the component. The larger the component, the lower the Head Speed. This is to prevent the component from flying out due to insufficient suction of the vacuum nozzle, or to cause the component to be displaced on the nozzle and cause an inaccurate placement position. Therefore, the setting of Head Speed is limited. The mounting speed of MSHG3 can be divided into 8 levels, as shown in Table 1. After the turret picks up a component with a larger Head Speed, all components adsorbed on the turret will move at this speed, regardless of the settings in the Part Library. The turret speed is always determined by the largest Head Speed of the picked components. Obviously for the placement process, it is best not to put components with different Head Speeds together. On the one hand, it is possible to avoid the difference in the Head Speed of the components and affect the full utilization of Head Speed. On the other hand, for the turret, continuous acceleration or deceleration will also cause the extension of the production cycle and the instability of the movement.
4). Movement distance of X-Y table. This is an important factor that affects machine motion, and is also an aspect that many optimization software focuses on.
5) X-Y table acceleration and deceleration form. When the X-Y table moves from the position of the previous element to the position of the next element, even if this time is very short, it can be divided into the process of stationary-acceleration-maximum speed-deceleration-stationary. The acceleration mode of the X-Y table depends on the setting of the Head Speed of the Part Library. For MSHG3, when the Head Speed is set low, the acceleration state of the X-Y table will be maintained regardless of the settings of the components placed in the Part Library. Because for larger ICs or very fine pins, the high acceleration method will cause the solder paste to be unable to fix the component and cause the component position to shift. Therefore, for components with a lower Head Speed setting, it is best to arrange them behind the program to avoid the mutual influence of component settings and lead to a longer production cycle of the machine.
The above five points are the main factors that affect the speed of the placement machine. JOYSMT reminds us that in the production process, we can optimize the program by adjusting the arrangement order of the feeder and the placement order of the components to reduce the machine production cycle and improve Our production speed, thus improving the production efficiency of our machines.
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