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FEATURES OF MICROPROCESSOR CONTROL:
16-digit alphanumeric display to furnish tutorial style guidance
to the user. Response, by Yes/No and 0 to 9 keys only, is needed
for schedule generation.
Same microprocessor unit with embedded mater software meets the
requirements of spot/projection welding, robotised fixture linkups
as well as seam/rol-spot welding.
Verification routine for itemized tests on sensor switches solenoids,
powerlines, thyristors, water circuits, air pressure switches, etc.
‘Target current’ features to experimentally optimize
the weld parameters including tolerance levels combined with provision
to raise alarms on encountering errors.
8 different schedule each of 4 to 41 steps storable in memory at
any time.
Retention of schedules in memory without power.
Schedules selectable through remote switches as well as from keypad.
Measurements of weld time, weld current during each cycle to decide
the range of acceptable quality.
Diagnostic abilities and display messages to automatically report
status of power supply, air pressure, electrode condition, safety
devices, etc.
Programme lockswitch provision enables prevention of unauthorized
tampering and inadvertent change of approved weld schedule.
Display of secondary weld current in Killo Amps and Weld Time in
cycles after weld for spot/projection welding.
Optional display of current and heat cycles during seam welding
operations.
Optional facility to change welding current ±10% with the
help of a remote potentiometer without actually changing the programme.
Job/Batch counting facility.
Non-linear heat interpolating stepper system for current compensation
in case of electrode wearout during welding.
Checking of secondary welding transformer for open/short circuit
Can be connected to any CNC/Robotic Welding System
Selectable wave shape for weld heat:
Heating duration is arranged for subdivision upto 30 independently
settable segments. All segments are adjustable for durations along
with current levels (in the range of 20-100%) for starts and ends.
Upslope, Downslope and stepping style waveforms are easily programmable.
Looping back and oscillating between user selectable stages to give
versatility for pulsation welding, seam welding, heating, etc.
CONSTANT CURRENT BY DIGITAL COMPUTATION:
Built-in zerocrossing detectors, voltage monitors, current sensors
and multichannel A/D convertors wok with rapid response software
to digitally generate corrected phase delay signals during each
half cycle to ensure the best feasible control for consistent weld
quality. Measurement of true r.m.s. current to facilitate user-settable
tolerance limits and error alarms for every weld. Automatic correction
function well from –20% to +15% fluctuations of the supply
and any swings out of correctable range raise alarms.
QUICK REPLACEABILITY due to multipin connectors between microprocessor
unit and the power thyristor cabinet.
IMMEDIATE JOB ABORT in dangerous situations such as temperature
rise, reduction in water flow, etc.
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