Equipment - Resistance Welding Controls | Entron Controls | Unitrol Controls

Unitrol Controls - Solution 3Ø

FREQUENCY CONVERTER CONTROL SPECIFICATIONS

INITIATION MODES

1. Single or Two-level foot switch operation, single or dual schedule select.

2. Dual hand switch anti-tiedown, single or dual schedule select.

ELECTRICAL SPECIFICATIONS

208 – 575V, 3 Ø, 60/50Hz

STD. FUNCTION OPERATION RANGE APPLICATION
 WELDING MODES    SPOT, SEAM, ROLL-SPOT  -   Operates selected welding mode  
 COUNTER    Counts welds or finished parts  0 - 65,500    Production control  
 TIP ARC CONTACTOR    Shorts transformer windings    -   Eliminates arcing at electrodes
 KEYBOARD KEYLOCK    Prevents program changes    -   Eliminates unauthorized changes  
 RETRACT    Operates RETRACT solenoid    -   Sets large or small electrode opening  
 KEY LOCK RAM FCTN.    Can operate key locked rams    -   Locks retract head on Sciaky-type welders  
 DUAL HEAT    Two independent weld schedules from the 75 in memory    -   Welding two thickness combinations in one handling  
 SQUEEZE TIME    Dwell before firing    0-99 cycles    Fire after electrodes are closed  
 WELD    Main weld heat    0-99 cycles 0-99 impulses 0-99% heat 0-99 cool cy.    Main heat for all welding programs  
 DECAY-WELD    Ramp down of heat after weld    0-99 cycles 0-99% heat    Control heat cracking; Smooth transition between impulses  
 HOLD TIME    Dwell after welding    0-99 cycles    Allows nugget to cool  
 SCHEDULE MEMORY    Instant recall of complete welding schedules    75 complete schedules    Instant setup for welding of common metal combinations  
 PREHEAT    Heat sequence before weld    0-99 cycles 0-99 impulses 0-99% heat 0-99 cool cy.    Controls heat when welding heavy parts  
 DECAY-PREHEAT    Dynamic lowering of heat after preheat    0-99 cycles 0-99% heat    Control heat cracking; Smooth transition between impulses  
 QUENCH & TEMPER    Cool and reheat at end of welding sequence    0-99 cycles 0-99 impulses 0-99% heat 0-99 cool cy.    Reduces brittleness in high carbon steels  
 REPEAT    Automatic opening & closing of tips while initiation is closed    0-99 cycles    Allows “automatic” operation of welder on long rows of repetitive welds  
 WATER SAVER DRIVER    Operates water saver solenoid    1 minute    Turns water off 1 minute after last weld  
 TIP FORCE    Calculate needed pressure  0-9,999 lb    Fast setups for WELD and FORGE  
 PRECOMPRESSION, POSTCOMPRESSION  Timed high pressure before first heat    0-99 cycles ON 0-99 cy delay    Lowers surface resistance at start of weld for consistency  
 FORGE DELAY    Timed delay of high pressure    0-99 cycles    Reduces nugget internal cracking  

Spotwelding Consultants Inc.

4209 Industrial
Rowlett, Texas 75088
Toll Free: 888-255-6780
Phone: 972-475-0874
Fax: 972-475-5024