CP643 系统参考.pdf - 第87页

(7) Setting the Nozzle Back Light Disk Diameter The nozzle back light disk diameter can be set which allows a wider possible range of options related to what type of nozzle can be affixed in each holder. Check the nozzle…

(6) Setting the Reference Value for the Brightness of the Nozzle Back Light Disks

It is important to maintain the reflective capacity (brightness) of the fluorescent disks

attached to the nozzles in order to ensure accurate vision processing and placement of

parts. The reference values (reference gray value, reference gray value tolerance range

and the set reference deviation tolerance range) for measuring the acceptability of the

brightness of the light given from these disks can be specified by the user. The user is

notified at the machine if the specified tolerance values are exceeded.

Reference gray scale settings

Set the following Proper data item.

547. Back light stn. Value Wide [0 ~ 255] = 170 (Default)

548 Back light stn. Value Narrow [0 ~ 255] = 150 (Default)

The settings return to the default values after a reset-start has been carried out.

Reference gray value tolerance range and set reference deviation tolerance range

settings

These values are set using commands at the machine. Select the following command

sequence to carry out these settings:

[SET] – [MANUAL] – [NOZZLE] – [CENTER] – [TOLERANCE]

Note: For information concerning the displays of this command key operation refer to Part 3

Chapter 3, "Command Descriptions”.

The tolerance range does not need to be set by the user. When a reset-start or changes to

the reference gray scale value are made in Proper data, the tolerance range is set

automatically such that measured brightness values do not exceed the tolerance range.

The brightness measure results are checked against the user’s tolerance settings if the

tolerance is set using the command sequence above.

Part 2 Chapter 1 Basic Operation

Edition 1.1 2-1-29 CP643E System Reference

(7) Setting the Nozzle Back Light Disk Diameter

The nozzle back light disk diameter can be set which allows a wider possible range of

options related to what type of nozzle can be affixed in each holder.

Check the nozzle assignment table (under (3)”Necessary Data” in 1.4.2 “Nozzle Center

Measurement” of this chapter) for the settings.

Specify at the “Back_light_size” item in the NAT data.

Specify at the “Back Light Diameter” item in the Nozzle Data.

Back_light_size

CP643S2013

Part 2 Chapter 1 Basic Operation

Edition 1.1 2-1-30 CP643E System Reference

1.4.3 Automatic Nozzle Selection

The machine often changes nozzle types according to the type of board being produced.

The nozzle data used for this purpose is specified in a nozzle assignment table.

The machine selects the most appropriate nozzle for placement based on the data related

to nozzles in Part Data and on the data in the nozzle assignment table.

Data necessary for determining nozzle type

• Nozzle diameter data in the nozzle assignment table

• Nozzle back light disk size data in the nozzle assignment table

• Maximum nozzle diameter and selected nozzle diameter in Part Data

• Minimum back light disk size in Part Data

(1) Nozzle Diameter Data

The diameter of the nozzle that will be attached to each holder for carrying out

production is set in the nozzle assignment table.

Refer to 1.4.2 “Nozzle Center Measurement” of this chapter for information concerning

the procedure for specifying nozzle diameter data.

Caution: For a 0.4 mm nozzle, use nozzle Nos. 2, 3, 4, 5 or 6.

(2) Nozzle Back Light Disk Size Data

The size of the nozzle back light disk of the nozzle attached to each holder is set in the

nozzle assignment table.

Refer to 1.4.2 “Nozzle Center Measurement” of this chapter for information concerning

the procedure for specifying nozzle back light disk size data.

(3) Maximum Nozzle Diameter and Selected Nozzle Diameter

There are two fields in Part Data which are used in the automatic selection routine of the

machine. They appear under Carrying_data as follows.

PART DATA

Carrying_data

17. Nozzle_size_max. : Defines the maximum diameter of the nozzle which can be used

in placing the part

Example) 17. Nozzle_size_max 1.3

36. Nozzle_size_CP6 : Defines the specific nozzle diameter when a specific nozzle size

should be used

Example) 36. Nozzle_size_CP6 1.0

Normally the optimal nozzle for placement is automatically selected from the nozzle

assignment table and the maximum nozzle size data (Nozzle_size_max).

However, if a specific nozzle is to be set, then and only then should the select nozzle size

data “Nozzle_size_CP6” be input.

Part 2 Chapter 1 Basic Operation

Edition 1.1 2-1-31 CP643E System Reference