11
B) MOTOR TEST
When trigger switch is closed – only feed motor starts, gas valve and contactor remain disenergised.
C) 4-STROKE CONTROL
The welding process is controlled by trigger switch S1 (welding gun) – as shown below:
NOTE:
On the LKC31 – for selected 2-S/4-S mode – active signals are high!
3.1.4 WIRE FEED SPEED
The wire feed speed setting range is 1,6 to 25 meter/minute, the upper speed may be adjusted by R6A,
minimum speed is adjusted by R15A.
V-REF voltage is reference signal for motor speed control circuit.
Note:
By the potentiometer R6A and R15A – there is set the ratio Vmax : Vmin; fine adjusting of the motor
speed (depending on the motor characteristic) – is performed by the R22A (see – section 3.1.5).
As well the motor speed (especially the lower range) – is influenced by the setting of I x R
compensation(R45 – see section 3.1.5).
Summary of Contents for LKB 400W
Page 1: ...LKB 400W WELDING RECTIFIER Service manual 0349 300 020 01 01 24 ...
Page 5: ...5 LKB 400W 400V ...
Page 6: ...6 2 COMPONENT POSITIONS CIRCUIT BOARD LA07 A1 ...
Page 7: ...7 DIAGRAM LA07 A1 ...
Page 9: ...9 3 COMPONENT POSITIONS CIRCUIT BOARD LKC31 A2 ...
Page 22: ......
Page 25: ...25 ...
