How System Operates - Unitrol RST300-115-RIVET Manual

SOFT TOUCH PINCH-POINT SAFETY SYSTEM
FOR INSTALLATION ON PNEUMATIC RIVETING MACHINES
HOW THE SYSTEM OPERATES:
When the voltage from the foot switch goes HIGH, this voltage goes to the 9280-TS7
SOFT TOUCH detection board, terminal #9.
The output terminal #11 (SVL) goes HIGH to turn on solenoid valve SVL.
This closes the riveting mandrel under low force using low air pressure on the forward
port of the riveter air cylinder.
The 9280-TS7 board checks input at terminals #4 and #5 to see if the voltage signal
drops a minimum value indicating that the riveting mandrel have made contact on a
conducting material (continuity detected).
If this contact is NOT sensed within the maximum time setting on the board's DIPswitches*,
the output terminal #11 (SVL) will go LOW and drop out solenoid valve SVL to open the
riveting mandrel.
If this contact IS sensed within the maximum time setting:
• Terminal #11 (SVL) will continue to be HIGH
• Terminal #13 (SVH) will go HIGH
• Solenoid valve SVH will be turned ON to start high riveting mandrel pressure
*The maximum time the system uses for
detecting continuity is the TOTAL of the four
switches set on the DIPswitch block on the upper
left corner of the sensor board. Set it for about
1.5X the maximum time it takes to close the
mandrel on the part.
BLANK TIME: 50% of the DETECT TIME selected
will be used by the sensor board to block reaction
to continuity during this time. For example, if
the 1 and 0.5 DIPswitch paddles are closed
(1.5 second selection), continuity in the first 3/4
seconds will not turn on the full force.
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| SOFT TOUCH FOR PNEUMATIC RIVETERS