CP643 系统参考.pdf - 第126页

1.15 T erminate Sequences A terminate sequence can be set to ensure that all sequences up to and including the terminate sequence are carried out, before the machine proceeds with the sequences after the terminate sequen…

1.14 Changing Table Acceleration

There is little meaning in placing parts accurately if they are thrown out of position by

the subsequent table movement. If there is a problem with parts moving on the board

due to the high inertia of the table, the acceleration of the table can be reduced after the

parts have been placed. The XY-table speed can be specified in the part data from 5

available speeds (UHi, Hi, Mid, Low, ULo). When placing parts with a “Low” or “ULo”

table speed, the table acceleration/deceleration is slower than usual to prevent part

placement deviations caused by motion shocks.

Set the table speed to an appropriate level for the parts you are placing in order to avoid

any unwanted movement of the parts.

The table mode “ULo” parameter can be changed to “SULo” using the following Proper

data setting.

Machine_Status_B XXXX XXXX XXXX 1XXX (X: 0 or 1)

If this Proper data item is set as shown above, the XY-table will be operated using a table

movement speed and speed change time that are even slower than the normal “ULo”

table mode. (“SULo” table mode)

Part 2 Chapter 1 Basic Operation

Edition 1.1 2-1-68 CP643E System Reference

1.15 Terminate Sequences

A terminate sequence can be set to ensure that all sequences up to and including the

terminate sequence are carried out, before the machine proceeds with the sequences after

the terminate sequence.

For example, consider the case where an SOJ is to be placed on top of a 1005 chip. If

recovery is carried out for the 1005 due to an initial failure to place that part, then it is not

possible to place the 1005 later since the SOJ will already have been placed. By setting a

terminate flag at the 1005, the SOJ cannot be placed until the 1005 has been placed.

A terminate flag is set in the sequence data of a production program.

Similarities and Differences Between Placing Parts Based on Part Height and Placing

Compared to Changing Placement Specifications Based on Part

Height

Similarity

The parts are allocated in a similar manner.

Differences

Parts Height Terminate Sequence

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Use of Proper data settings Yes No

Method of recognition Automatic Production program

Number of placement changes Single Multiple

Part 2 Chapter 1 Basic Operation

Edition 1.1 2-1-69 CP643E System Reference

1.16 Turnover Production

In certain sequences, the parts on the device table are arranged so that after a certain

board is finished, the device table for the next board has to move a long distance before

starting on the next board (E.g.: from D140 to D1). In this case, in order to minimize the

time spent waiting for the board to change, the placing sequence can be read from front

to back, and then from back to front, switching each time a new board is loaded. This

means time is not lost waiting for the device table to return to its original position every

time a new board is loaded. This is called "turnover."

During turnover production, the sequence order is reversed every second board, but the

fiducial and block skip marks are always read before placing.

Turnover production can be enabled/disabled by selecting the command sequence

[SET] – [STATUS] – [ETC] – [TURNOVER]. Depending on the direction of production,

either “Normal Turnover” or “Reverse Turnover” will be displayed.

Caution: After turnover is canceled the sequence will execute in correct order. Therefore, be

careful not to cancel the turnover mode while the sequence is operating in reverse order.

Part 2 Chapter 1 Basic Operation

Edition 1.1 2-1-70 CP643E System Reference