M3plus_OperationManual_e.pdf - 第136页
4 Using the adv anced functions 4 - 1 1. Board parameters 1.1 Using the badmark functions The badmark function permits the machine to cancel component mounting if the machine detects a badmark affixed to the specified po…
4
Using the advanced functions
4 -1
1. Board parameters
1.1 Using the badmark functions
The badmark function permits the machine to cancel component mounting if the machine
detects a badmark affixed to the specified position on a PCB.
The machine mounts components when no badmarks are detected.
Badmark function
The machine skips mounting components when a badmark is detected.
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Badmarks are broadly classified into two types: one is specified for the PCB data and the
other is for the mount data. These badmarks are further divided by their functions into
"Board badmark", "Block badmark" and "Local badmark".
Board badmark
A board badmark is affixed on a PCB and used to determine whether or not the machine searches for
block badmarks on the PCB. For example, when a multi-block PCB with no faulty blocks (no block
badmarks) is fed to the machine, it is a loss of time to search for block badmarks on that PCB. The
PCB badmark function permits the machine to search for block badmarks only when the PCB
badmark is detected. If no PCB badmark is detected, the machine mounts components on all blocks
of the PCB without searching for block badmarks.
Block badmark
A block bad mark is affixed to each block which is defective. The machine mounts components only
on blocks with no badmark affixed. For example, if Block B is defective in a multi-block PCB
consisting of 4 blocks (A, B, C and D), affix a block badmark on Block B so that the block badmark
function allows the machine to skip mounting on Block B. Components will be mounted only on
Blocks A, C and D.
c
CAUTION
The block badmark function can only be used for multi-block PCB data with "block offset"
specified on the Offset tab screen.
Local badmark
The local badmark function cancels component mounting by recognizing a badmark specified at a
mounting point.
4 -2
4
Using the advanced functions
1. Board parameters
Badmark operation
The flow chart below shows typical methods for setting a board badmark and block badmark.
Operation
not performed for
the block
Operation
performed for
the block
Operation
performed for
all blocks
Start
Search PCB badmark
Detected Not detected
Search block badmark
Badmark operation flows
Detected Not detected
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