CUTMASTER 40MM
SERVICE 5-10 Manual 0-5085
F. Pilot Arc Test
There are three types of START signals which can be
used to begin system operation:
1. Hand Torch - Operator switch mounted on
the torch handle.
2. Machine torch or Automation torch:
A. Hand held pendant switch
B. CNC cable interfaced to controller.
1. Provide a START signal to establish a pilot arc
and note the following
• CoolingfansMOT1-3turnON.
• Gassolenoidopens
• Gasows
• After twosecondsthe gassolenoid closes
and gas stops flowing momentarily, then gas
solenoid re-opens and gas resumes flowing
• DCLEDcomesON
• Pilotarcisestablished
2. Remove the START signal and not the follow-
ing
• Gascontinuestoow
• DCLEDgoesOFF
After 20 second post flow time
• Gassolenoidcloses
• Gasowstops
This completes the Pilot Arc Test. If the above are all
correct then proceed to the next section "G, Main Arc
and Controls Test". If the unit does not function as stated
above, then note the symptom and proceed to Section
"5.08, Pilot Arc Problems".
G. Main Arc and Controls Test
Connect work Cable to the work piece, provide a
START signal to establish a pilot arc. Bring torch to
within 1/8” – 3/8” of the work piece to establish
main cutting arc.
• MainCuttingArcEstablishes
• OnPCB1D59turnsOFFandD78turnsON
1. Clamp DC ammeter around the work cable. Out-
put will be 120 amps.
2. While cutting, adjust the CURRENT CONTROL
POTENTIOMETER from maximum setting to
minimum setting.
• Currentadjusts from120 ampsdown to30
amps
3. Set the CURRENT CONTROL POTENTIOM-
ETER to maximum position.
• Current adjustsfrom30 ampsup to120
amps
4. While cutting, touch the tip of the torch to the
work piece, This is called Drag Mode.
For Hand and Machine Torches:
• TipSavercircuitwillactivate,currentdrops
to 60 amps.
For Automation Torches:
• TheArcwillshutOFF,theFAULTindicator
and the 85 PSI LED will flash at 5 cycles per
second. To reset, lift tip OFF the work piece,
remove and re-apply the START signal and
go to step 6.
5. Lift tip OFF the plate approximately 1/4” (6 mm).
• TipSavercircuitdeactivates,currentgoesback
to 120 amps
6. While cutting keep the torch switch closed, bring
the torch OFF the edge of the material.
• Cuttingarcextinguishes
• Gassolenoidcloses
• Gasflow stopsmomentarily thenrestarts
when solenoid opens
• Pilotarcignites
7. Open the torch switch
• DCLEDturnsOFF
After 20 second post flow time
• Gassolenoidcloses
• Gasowstops
8. Set the FUNCTION CONTROL SWITCH to
RAPID AUTO RESTART mode.
9. Provide a START signal to establish a pilot arc.
Bring torch to within 1/8” – 3/8” of the work
piece to establish main cutting arc.
10. While cutting keep the torch switch closed and
bring the torch OFF the edge of the material.
• PilotArcre-ignitesimmediately
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