Optimization case of abreast smt nozzle style placement machine

Optimization case of abreast smt nozzle style placement machine 

1.SMT Feeder position considerations: For abreast nozzle of placement machine feeder position is slightly different from the turret style,

The arrangement principle is as follows:

(1) The classification is based on components, the same type of components is arranged together, as far as possible to achieve simultaneous sampling. Side-by-side nozzle, between the two nozzles have a fixed distance (such as GSM is 20mm width), this distance is just with the station 8 mm feeder is equal, in order to save the picking time, the best way is to patch the first nozzle at the same time to absorb the components, such as less than 12 mm components are arranged together, 16 mm components are arranged together, greater than 20mm Of the components are arranged together.

(2) The same type of components placed in the order on the feeder, should first place the most components of the number of components, followed by the placement of a relatively large number of components, and finally placed fewer components components. Components placed as much as possible to patch position The placement of the material and the placement of the total travel the shortest principle, such as the placement of the location of the central part of the board, the feeder position is preferentially installed in the middle of the printed circuit board near the middle of the station, you can save the head back and forth moving time. In addition, for the board to install a larger number of components, in order to save time to pick up a feeder can be changed to a number of feeder, while picking, while the same time, Extend the refueling time, save machine downtime.

(3) it will be placed in the placement of the components are not far apart, the placement of the patch to reduce the moving distance.

2. Programming considerations.
(1) Minimize the number of nozzle replacements. The components are arranged in the same type, and the nozzle can draw such components at the same time. When the type of suction nozzle is completed, replace the next nozzle type and avoid frequent replacement of the nozzle. When more than one make-up placement programming, you can make the puzzle expansion as a whole board placement, reduce the number of nozzle replacement.

(2) To reduce the loading and unloading head before and after the material to move back and forth distance in the element reclaiming material, as far as possible in the machine for a feeding platform for material, such as only in the back of the material station to take, to avoid before and after the material caused by the increase in moving time .

(3) To Consider the ccd camera ,and the general placement machine has two sets of cameras, the first group installed in the patch head, the components picked up, the patch head in the process of moving to complete the flight identification to the middle of time, The camera is usually handled with components smaller than a certain size, for example, less than 20mm. The second group is mounted on a part of the machine and the suction nozzle picks up the components and needs to be identified on the camera. This will take part of the movement time , Usually this type of camera to identify the larger high-precision components, such as more than 20mm components. In programming, try to make multiple nozzles to pick up, identify and mount at the same time as far as possible not to absorb the need for two kinds of camera identification components , To spend more time to identify the entire placement of the head to wait for all the nozzle to complete, to absorb the next set of components.

(4) Tray discs to consider. General multi-function machines, all with a number of waffle Tray disk. Mounter is usually a Tray disk to move to the patch picking position, after drawing components, and then replace another Tray disk , Because Tray mobile replacement speed is slower than the placement speed, multi-nozzle side by side patch, if the adsorption components did not reach all, need to wait for the arrival of the next Tray disk components, so a waste of time. Programming should be considered, in the replacement Tray Disk time, patch head do not have to wait, to install other components, and then go to absorb  ic tray components.