User-Manual-of-NeoDen4-PNP-machine.pdf - 第8页

3 Figure 1. 2 Figure 1. position on the no zzle, very fine-pitch components (down to 0 201) ca n be p laced with repeatab le accura cy once th e correc t coord inates are identified. With the se ba sic unde rstandings, t…

1.2

Structure of NeoDen4

Design principles:

At the core, the NeoDen4 is a 4-axis Windows- controlled CNC with four separate vacuum nozzles,

each connected to its own vacuum pump. The machine employs a single X-Y coordinate system

covering the entire movement range of the head, which is 310x500mm. With resolution of .01mm

(10µm) and repeatability of .02mm (20µm), any X -Y coordinate can be identified as the location of a

feeder, the start of an array of components in a tray or short tape, a fiducial or the location at which a

component is to be placed on a circuit board.

Feeders and Nozzles:

Electric tape-and-reel feeders, vibration feeders and virtual tray feeders are all supported. Because of

the flexibility of the architecture, and the need to work with affordable quantities of parts, short tapes

can also be configured on the machine’s bed. Any size nozzle can be installed in any of the four

locations in the head, so a single machine can handle all of the necessary components without the

need for nozzle changes. The spring-loaded nozzles simply snap in and pull out of the head. Any

nozzle can be installed in any of the four locations on the head.

Number of Feeders:

The NeoDen4 can accommodate up to 48 8mm tape-and-reel feeders on its left and right rails, and

any size feeder (8, 12, 16 and 24mm) can be installed in any combination or order on the left and

right sides of the machine. The electric feeders are inexpensive but sophisticated microprocessor-

controlled units paired will tape peelers. In addition, the vibration feeder (included) can handle up to

5 separate tubes. The amount of space available for tray-fed components and short tapes depends on

the available real estate on the table. Any area of the table may be used for components awaiting

placement, or for the board under manufacture.

Component Thickness Limitations:

When using tray-fed and short-tape components, the maximum allowable component height is 5mm.

When using tape-and-reel components, we recommend a maximum thickness of 1.8mm for reliable

operation.

Rail system:

Machines equipped with the auto-loading rail system can accommodate boards from to in width, and

in length. Even when the rail system is installed, any space left over on the table is still available for

trays and short tapes. (The left rail can be moved to accommodate wide boards by removing the left

table extension. In this case, a block of material should be affixed to the table base to raise the tray or

short tape to the approximate height of the extension). The rail system allows automatic feeding of

PCBs, automatic alignment of the board with the camera, and automatic ejection from the front of the

machine or the rear. Rear-ejection is useful when the machine is connected to an optional conveyor

that can deliver the finished board directly to the reflow oven or to another NeoDen4.

Vision System:

The NeoDen4 features a high-precision, two-camera vision system. The cameras are made by Micron

Technology and are precisely aligned to the nozzles using the single unified configuration/operation

application that loads on power-on.

The downward-looking camera:

On the head is used for precision location of feeders and PCB placement points. The downward-

looking camera also verifies proper board placement (and compensates for minor board-position

inaccuracies) by auto-aligning the nozzles to multiple fiducials on the board before beginning actual

pick-and-place operations. Once the coordinates are established, the semi-closed-loop stepper motors

are able to repeat these locations to 20µm accuracy without further need for this camera.

The upward-looking camera：

located on the right side of the machine. When enabled, this camera first ensures that a component is

attached to the proper nozzle. If the camera detects the absence of a component, the machine will

make up to two additional attempts to pick a component before asking the user for further

instructions. Once a component has been verified as “picked”, the camera verifies its position relative

to the nozzle. Because SMDs are small and light, and are held only loosely in their packaging, there

can be a great deal of variation in the actual position of the component when it arrives in “pick”

position and is lifted by the nozzle. The vision system computes the difference between the ideal and

actual position (both X-Y and rotational), and then corrects for any error before precisely placing the

component. Because the vision system continually corrects for even small errors in component

Figure 1.2

Figure 1.

position on the nozzle, very fine-pitch components (down to 0201) can be placed with repeatable

accuracy once the correct coordinates are identified. With these basic understandings, the following

images reveal the basic components of the Neoden4, see Figure 1.1, Figure 1.2 and Figure 1.3.

Figure1.1

Figure1.2

Figure1.3

Operation Flow Chart

Note

Check the working environment whether it

is safe or not

The machine will start a 1-2 mins self-

inspection after boot-up. It enters the

operation page once finished. Need to wait

1-2 minutes after turn on the machine,

mounting head will move diagonally and

then enter into operation page

Please refer to the following pages about

detailed programming tutorial

After making a programming file, there

may exist several unpredictable problems,

such as rotation issues of components, so

a production testing is necessary for

solving issues.

Start to pick and place

Power off software

Power off after the software being turned

off, which decrease the damage to the

software

Keep the machine clean and nozzles need

to be washed regularly

Keep daily maintenance of nozzle assures

high utility.