Welding Control Unit Model TE450

LORS/TECNA

Specifications subject to change without notice.

TE450 is a microprocessor welding control unit for suspended resistance welding guns. This control unit includes specific functions to be used when working with suspended welding guns, such as the double stroke control, and a function checking the efficacy of the safety devices which can be eventually installed on the handle of the machine. It is possible to program Sixty-three different welding programs. Two programs can be recalled by an external device on the handle. Each program is formed by eighteen programmable parameters which describe the working cycle. Besides the simple four times cycle, the control unit enables to carry out welding processes with pre-weld current, slopes, pulses and post-weld current. The control unit can be programmed for working under two different operating modes: standard one and constant current. An integrated ammeter allows to know the welding current used and to set maximum and minimum limits.

**PROGRAMMABLE PARAMETERS**
NUMBER	PARAMETER	RANGE
A	WORKING MODE	PW% (power percent) IK (constant current)
B	CONTROL MODE	NO (disabled) CUR (current limits) DEG (angle limits)
C	STROKE	SHORT LONG AUTOMATIC
1	SQUEEZE 1	01 – 99 cycles
2	SQUEEZE	01 – 99 cycles
3	PRE-WELD	00.0 – 60.0 cycles
4	PRE-POWER	01 – 99 %
5	COLD 1	00 – 50 cycles
6	SLOPE UP	00 – 25 cycles
7	WELD 1	00.5 – 60.0 cycles
8	POWER 1 CURRENT 1	10 – 99 % 02.0-36.0 kA
9	N. IMPULSE	01 – 09
10	COLD 2	01 – 50 cycles
11	SLOPE DOWN	00 – 25 cycles
12	COLD 3	00 – 50 cycles
13	POST-WELD	00.0 – 60.0 cycles
14	POST-POWER	01 – 99 %
15	HOLD TIME	01 – 99 cycles
16	OFF TIME	00 – 99 cycles
17	CURR MIN ANGLE MIN	2-36 kA 0-180 °
18	CURR MAX ANGLE MAX	2-36 kA 0-180 °

MAIN FEATURES

Simplified programming by 5 push-buttons and LCD display.
Synchronous thyristors drive device with phase shift control for welding current adjustment.
63 welding programs, 2 programs selectable on the handle.
18 programmable parameters for each program.
Slope and pulse functions. Pre-weld and post-weld currents.
Adjustment of the welding times in half-periods.
Display of the welding current in kA.
Display of the welding current conduction angle.
Double operating mode: standard and constant current.
Welding current limits or conduction angle limits.
Automatic double stroke function.
Stepper function against electrodes wear with programmable increment curve.
Counter of the performed welds.
Compensation of the secondary current to weld oxidised sheets and rods.
Single and automatic cycle.
WELD/NO WELD function.
Delay of first phase shift adjustment, to get the best balance of the machine absorption from mains.
Control of 2 solenoid valves 24 Vdc 7,2 W Max with protected output against short circuit: electrode closing valve and double stroke valve.
Self-adjustment to the network frequency 50/60 Hz.

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LORS/TECNA