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Safety Device Sensor for Unitrol
Controls Now a Standard Function for Unitrol Solution Controls
Protects against PINCH POINT INJURIES with a fully
Installs on any type of spot welder
SAVES MONEY by improving weld Quality
LORS is pleased to offer the new UNITROL SOFT TOUCH welder operator safety
option. This patent pending function keeps the electrode
force very low until it is safe to apply full welding force. This passive fail safe system has been approved by OSHA in manufacturing plants nationwide.
It is now standard on all 9180 series SOLUTION controls
without extra cost. Existing
SOLUTION controls can also be upgraded for this SOFT TOUCH function.
IT WORKS: After initiation,
electrodes start to close under LOW FORCE. A UNITROL TOUCH SENSOR system
decides when the electrodes have closed on or near the metal being
welded. If an obstruction is detected prior to closing, the electrodes
will go back to the fully opened position. No adjustment of SOFT TOUCH
is needed when changing welding force or electrode spacing.
The system is field adjusted (lockable settings) so that force between
electrodes for the advance portion of the stroke remains low enough
to avoid major injury to the operator’s
fingers. For press welders, this will even reduce force between electrodes
to considerably less than the dead weight of the ram.
FAIL SAFE SYSTEMS:
If the sensor switch is already closed when the welder is being initiated,
the electrode will not even start to move, and the display will show
which sensor input is closed at that time.
If the sensor wires from the SOFT TOUCH system have become disconnected
or are making poor contact, the electrodes will close under low force
and then return after a short field-settable delay (1-99 cycles).
HARDWARE IS NEEDED: To make this system operate, you will have to add a 5-way externally
piloted solenoid valve, a shuttle valve, and a precision pressure regulator
system to an existing 4-way externally piloted (or direct acting) solenoid
valve. Unitrol offers three kits for easy installation:
WEIGHT RAMS: This #9181-34W
kit is used on:
PRESS WELDERS that
have dead weight (with air disconnected from welder) of over
50 pounds. The kit is factory pre-plumbed for fast installation
and includes all necessary components and interconnecting tubing.
WEIGHT RAMS: This #9181-34Y
kit is used on:
WELDERS that have dead
weight (with air disconnected from welder) that is less than 50 pounds,
or does not drop by it’s own weight.
ROCKER ARM WELDERS The
kit is factory pre-plumbed for fast installation and includes
all necessary components and interconnecting tubing.
WEIGHT GRAVITY-DROP RAMS: This #9181-34H kit is used on:
WELDERS that have
dead weight (with air disconnected from welder) of less than 50 pounds
and drops smoothly by gravity. The kit is factory pre-plumbed for
fast installation and includes all necessary components and interconnecting
SENSOR: You can also add your own proximity switch
or LVD system adjusted to close a switch when the electrodes are
less than ¼” apart
to the system. The SOLUTION will not turn on the high-pressure valve
until both metal is detected and the proximity switch has been closed.
This is often useful for applications where the parts being welded
are not flat prior to the welding process.