Instruction Manual
ITEM TE700
TECNA
S.p.A.
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SQUEEZE
Even the SQUEEZE time is a wait time similar to that of SQUEEZE 1. It is required in the
case of welders that contemplate low-force squeeze function. In this case, said time
determines the interval between the application of the welding force to the electrodes (valve
EV2 energizes) and the beginning of the welding. It must be long enough to allow the
electrodes to reach the correct clamping force before the welding starts. An insufficient
adjustment of this time triggers sparks between the electrodes and the sheet when the
welding begins and could cause quality inconsistency
.
The SQUEEZE time is activated via
parameter LOW FORCE SQUEEZE inserted in the
FEATURES TE700
menu. It is advisable
to activate this parameter only in the presence of a pneumatic circuit fitted with low-force
squeeze. The SQUEEZE time is summed up to the SQUEEZE time 1. The cycle may be
interrupted during the SQUEEZE time by deactivating the cycle start signal.
PRESSURE
This parameter, expressed in bar, represents the welding pressure value. It is used only if the
proportional valve is installed in the pneumatic system. The set value must guarantee a
suitable clamping force during the welding operation. An insufficient adjustment of this value
produces sparks between the electrodes and the sheet when the welding begins. This
parameter is activated through the PROP. VALVE function present in the
FEATURES TE700
menu.
FORGE
The FORGE parameter expresses the delay time that elapses from the beginning of the
welding process and the application of the forging force. It is used exclusively with pneumatic
circuits that contemplate the forging function. Such function activates EV3 which permits to
increase the electrodes force during the welding cycle.
If the value is set to zero, the FORGE function is disabled, valve EV3 is activated either
simultaneously with SQUEEZE time 1 or with the SQUEEZE, if the relevant function was
activated. This parameter is activated through the specific function in the
FEATURES TE700
menu.
PRES-FORG.
This parameter, expressed in bar, represents the forge pressure value. It is used only if the
proportional valve is installed in the pneumatic system. The set value must guarantee a
suitable clamping force during the forging. An insufficient adjustment of this value produces
sparks between the electrodes and the sheet during the welding operation. This parameter is
activated after the activation of the FORGE and PROP. VALVE parameters in the
TE700
FEATURES
menu.
PRE-WELD.
The pre-weld. time parameter (PRE-WELD) describes the duration of a current passage that
can be carried out before the weld itself. This parameter is expressed by four digits since it
can be adjusted with a 1-mS precision. If the parameter is set to 0, the pre-weld. will not be
carried out.
This parameter may be activated through the relevant function in the
SETUP MENU
.
PRE-CURR.
The value expressed in this parameter indicates the current which the PRE-WELD is carried
out with. This parameter is activated through the specific function in the
SETUP MENU.
This
parameter is displayed only in IK or ENE WORKING MODE.
