YS24X_Ope_E - 第69页

1-32 1 Part names and functions 8.2 T ape cutting during board conveying All tape cutters can operate with no special restrictions w hile a board is being convey ed to the exit after component mounting is completed. Howe…

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Part names and functions

8. Tape cutter (option)

Tape cutters are internally installed as options for the YS series. There are two types of tape cutting during

automatic operation. Both types can be jointly used.

Tape cutting is available in the following two types:

• During component mounting : Tape is cut during component mounting after completion of pickup.

• During board conveying : Tape is cut while each board is conveyed to exit after component mounting.

Tape cutter open/close timing

• Return to origin (close

→

open)

Opens all tape cutters immediately after return-to-origin operation.

• During start and reset of automatic operation (close

→

open)

Closes all tape cutters and then opens them.

• During machine power-off (open

→

close)

When turning off the machine power, a confirmation dialog box appears to help navigate the processing method. Pressing

the OK button closes all tape cutters.

8.1 Tape cutting during component mounting

Tape is cut during component mounting based on the actual feed length (tape feed length) that the tape is fed

from the feeder.

• Tape feed length

This is the length calculated for each feeder from the feed pitch and the tape feed count of the components during

component pickup. Tape cut length is decided during component mounting based on the longest tape length fed into one

cutter.

• Feed pitch

Feed pitch is calculated using the feed pitch set (in memory) for the SS feeder at each station, or the feed pitch set in the

board data.

• Tape cut timing

Tape is cut after component recognition during the mounting operation.

However, no component is mounted if the tape cutting has not finished before feeding of the next component group for

pickup starts.

• Tape cutting conditions

Tape must be cut during component mounting, in the period from "Standard cut length" to "Maximum cut length" that

were preset in the machine settings.

1. Tape is always cut when tape feed length exceeds maximum cut length.

2. Tape is usually cut when tape feed length exceeds the standard cut length.

NOTE

Tape feed length being counted when tape cutting ends normally is reset.

Delaying the tape cutting

• If feeders on multiple tape cutters are simultaneously longer than the standard cut length and shorter than the

maximum cut length, then the tape with longer feed lengths are cut, and cutting of tape with shorter feed lengths is

delayed.

• Even if longer than the standard cut length, the tape cutting is delayed to allow component mounting to proceed in

cases where the number of heads used in this pickup group is fewer than the specified number of heads.

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Part names and functions

8.2 Tape cutting during board conveying

All tape cutters can operate with no special restrictions while a board is being conveyed to the exit after

component mounting is completed.

However, if there has been no tape feed whatsoever in tape feeders installed on the rear feeder plate since the

last tape cutting, then the rear tape cutters will not operate.

• Tape cut timing

Tape cutting operates at the timing that the boards are unclamped and conveyed to the exit after component mounting is

completed.

• Tape cutting conditions

Tape cutting is performed each time a board is conveyed to the exit after completing component mounting, and tape

cutting starts on all tape cutters that are set enabled.

8.3 Restrictions (caution)

Conditions affecting component mounting time

• If the tape feed lengths on the front and rear tape cutters simultaneously exceed the maximum cut length, then the

machine might delay component mounting to allow each tape cutter to cut the tape alternately.

• If the tape cutting speed drops due to a breakdown such as in the tape cutter valves or cylinder, then the machine

might delay component mounting.

Cautions for tape cutting during board conveying

Use caution when using board data where there is a large component feed length per feeder for each board, since the

tape that was cut off might hang up on the tape eject slot and does not reach the trash box.

Setting the standard cut length and maximum cut length

Hangs ups tend to occur during tape cutting performed during component mounting if the standard cut length and

maximum cut length were set to a large figure. Set these to a shorter figure if the tape does not easily eject after tape

cutting.

As a general guide, set the the standard cut length to 80mm, and the maximum cut length to 120mm.

NOTE

Operation buttons will be disabled during emergency stop or if an interlock is triggered.

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Part names and functions

9. Other options

9.1 Coplanarity checker

The coplanarity checker measures lead linearity and coplanarity of QFP/SOP leads or BGA bumps at high

speeds, and determines "pass/fail".

The coplanarity checker has the following two functions:

• Coplanarity check

Inspects uniformity of the lead bottom against the seating plane of components having wire leads or solder balls.

• Component recognition height check

Prevents lead components from being mounted in an inverted position.

Coplanarity checker

Multi-vision camera (standard)

Coplanarity checker

23128-L4-00

NOTE

For instructions on how to use the coplanarity checker, refer to the YS series programming manual.