Cut-Off Card Connection; Analog (Current And Secondary Voltage Measurements); Machine Size Jumpers J1, J2; Power Source X 450 Has A Jumper Fitted Between Connector X9:2, 5 - Kemppi FASTMIG X 450 Service Manual

7.4. Cut-off card connection

The PipeRoot process demands very quick response in the secondary current. This response is delivered by connector
•
X2

7.5. Analog (current and secondary voltage measurements)

Primary current is measured by current transformer on the main circuit card
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Current transformer signal is rectified on processor card (V15-V18) and converted to voltage signal by resistors (R118,
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R93, R94, R117, R164 and R165). This signal is then divided, filtered, amplified and brought to the fast analog- to digi-
tal converter (N7)
FPGA reads the measured primary current from A:D-converter data output
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FastMig X measures secondary voltage two different ways; differentially from wire feed unit and direct from power
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supply output. Differential voltage signal is brought to power source by connector X010. This connector leads the sig-
nal to processor card connector X11
The secondary voltage signal is scaled down, filtered and amplified before it goes to A:D-converters inputs
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FPGA reads the secondary voltage measurements from A:D-converters outputs
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7.6. Machine size jumpers J1, J2

Power source X 450 has a jumper fitted between connector X9:2, 5

7.7. Primary current limit

Primary current voltage signal is brought to the over-current comparator (N3). If primary current is too high the over-
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current comparator switch off the power source power stage
7.8. Leds
Kemppi OY
SERVICE MANUAL
FASTMIG X
Led Description
H1 State of the microcontroller
H2 State of the microcontroller
H3 State of the microcontroller
H8 FPGA's configuration
H9 Auxiliary voltages 15 V
H10 Auxiliary voltages 5,3 V
H11 Auxiliary voltages 1,2 V
H12 Auxiliary voltages 5 V
H13 Auxiliary voltages 2,5 V
H14 Auxiliary voltages 3,3 V
15 (37)