Arranging Backup Pins; Determining The Positions Of The Backup Pins - Samsung SM421 Operation Handbook

PART VI. Additional Check Points

Arranging Backup Pins

1. Determining the positions of the backup pins

- When you place the backup pins, you should avoid the hole in the PCB.
1. Place the master PCB in the conveyer.
Master PCB
Manufacturing master PCB
Master PCB prevents interference
between backup pins and parts.
For a double-faced PCB, a master PCB
is manufactured which has a hole in
the bottom area where the parts are
mounted.
Before removing the backup-pin, power off
the motor.
Warining
2. Arrange backup pins.
A. Place the backup pins on both sides where
the PCB is bent the least.
B. Place the backup pins where the parts are
mounted in the central area .
The number of backup pins
For a 200 mm-wide PCB, usually 6
backup pins are used.
SM421 Operation Handbook
57
PART VI Additional Check Points