Infinity EX High Throughput Conveyor Module.pdf - 第17页

INFINITY EX HIGH THROUG HPUT CONVE YOR MODULE DRIV ES AND SEN SORS Chapter Issu e 1 Aug 02 Technical Reference Manual 16.17 Figure 16-13 Board at Left/Right Opto Sensor Locations A uxiliary Rail Senso rs The auxiliary ra…

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INFINITY
EX
HIGH THROUGHPUT CONVEYOR MODULE
DRIVES AND SENSORS
16.16 Technical Reference Manual Chapter Issue 1 Aug 02
Rail Home Sensor The rail home sensor is a through beam opto type sensor.
The rail home sensor feeds directly to the Multiplexer controller and is used to
set the datum position for the moving rear rail. From this datum position, the
moving rail stepper motor moves the rear rail the amount of steps needed to
obtain the rail width set in the current board file. During machine initialization,
(power-up or upon exiting diagnostics), the rear rail moves to the rear of the
machine until the rail opto vane enters the rail home sensor, the motor is driven
in the opposite direction until the vane clears the home sensor and the motor
stops, the rear rail is now at the home position.
NOTE
Homing Sequence of this chapter refers.
Figure 16-12 Rail Home Sensor Location
Board at Left/Right
Sensors
The board at left and board at right sensors are background suppression opto type
sensors.
These two sensors are used to detect a board at the input and output of the print
station rail. As the machine is bi-directional the functions of both sensors are
reversed when the pass through direction is changed.
The input sensor is used to check for the presence of a board when upline transfer
starts. The board is transported to its position and processed after which it is
transferred to the output sensor where it stops unless the downline conveyor is
free to receive it.
These optos are fitted with a yellow LED along with a sensitivity control. There
is a small amount of positional adjustment in the bracket but generally it is not
necessary to reset it.
NOTE
For sensor sensitivity adjustment refer to Adjustment and Settings section of this
chapter.
Rail Home
Sensor
Rail Home
Opto Flag
(home vane)
View on Right Hand Side of Machine
INFINITY
EX
HIGH THROUGHPUT CONVEYOR MODULE
DRIVES AND SENSORS
Chapter Issue 1 Aug 02 Technical Reference Manual 16.17
Figure 16-13 Board at Left/Right Opto Sensor Locations
Auxiliary Rail
Sensors
The auxiliary rail sensors are diffuse opto type sensors.
There are two sensors, one on each of the auxiliary conveyors. As the machine
is bi-directional the position of each sensor is reversed when the pass thru
direction is changed.
Each sensor is used to detect a board on the conveyor. The belt motors stop when
a board is detected unless, the downline machine, (which can either be the print
station or an external machine, depending on the conveyor and the pass thru
direction) is free to receive it.
Boardat RightSensor
Boardat Left Sensor
FrontPrintStation Rail
Plan View on Machine - Printhead Removed
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Auxiliary Rail (4 Positions)
Rear Print Sation Rail
Auxiliary Rail
Sensor
Auxiliary Rail
Sensor
INFINITY
EX
HIGH THROUGHPUT CONVEYOR MODULE
SEQUENCES
16.18 Technical Reference Manual Chapter Issue 1 Aug 02
SEQUENCES
Homing Sequence The print station rail is homed during machine initialization only, (during power-
up or upon exiting diagnostics).
When the home command is received the rear print station rail is driven (in the
reverse direction) to the rear of the machine until the home vane, attached to it,
is detected by the rail home sensor. Upon detection (sensor ON) the motor is
driven in the opposite direction until the vane clears the home sensor and the
motor stops (sensor OFF).
Figure 16-14 Rail Timing Diagram
Rail Positioning There is a fixed relationship between steps of the stepper drive motor and rail
movement (in mm) due to the gearing ratios and pitch of the driving leadscrews.
Therefore, when a width is selected this is multiplied by the steps/mm factor and
sent to the stepper drive system.
All positions are relative to the home position.
Machine Sequences The high throughput conveyor system can operate in four modes, selectable on
the M27 located at the rear of the machine.
• Single Stage Normal
• Single Stage Fast
• Three Stage Normal
• Three Stage Fast
NOTE
1. Large apertures in the product board can cause the sensors to activate/
deactivate. In the event of false triggering, select Normal Mode.
2. In the sequences below, the machine is described as working in left to right
operation.
Single Stage Normal In single stage normal mode the auxiliary rails and the print station rail are
configured as one rail. The rail system transports the board from the upline
Home Position
Fwd
Stepper
Motor
Home
Sensor
0
Stopped
Rev
Vane leaves sensor
Vane enters sensor