Tweco 400 XT Ultra-Cut Plasma Cutting System - Manual (Page 160)

ULTRA-CUT 400 XT
A-52 APPENDIX Manual 0-5275
104 Transfer Lost
Arc transferred to metal for at least 50 ms. then went out.
Causes for 10� code:
• Cut demand set much lower than recommended for torch parts, i.e. 100A consumables in torch but cut current set for
30 or 50A (or zero). Current may be too low to keep arc on.
• Torch standoff too high for cutting process being used.
• Plasma gas flow too low due to a leak somewhere between the plasma regulator or the DPC 3000 and the torch. Check
for leaks.
• Remote analog current control switches set wrong.
o If remote analog current control is being used, SW�-2 (CCM CPU PCB) is on and SW11 (CCM I/O PCB) is set to
“A” (down) position, but no analog voltage connected to TB1-10 or J15-30 (CNC cable) then cut demand will be
zero, pilot will be weak, depending on torch height it may still transfer but will immediately go out.
o If remote analog current control is not being used but either SW11 is set to the down position or SW�-2 is on also
results in zero cut demand.
o If system is Auto-Cut XT, current control is an analog voltage from the GCM 1000 XT or the AC 200 XT front panel
pot. The current control setting will be shown on the front panel � digit display. SW�-2 should be off and SW11
set to up position. With pot at max, check for 3.3V on CCM I/O PCB TP9 (TP1 common). While turning the pot
toward minimum TP9 voltage should vary linearly to zero V.
Art # 12309
2
1
3
SW11
TP9
TP1 GND
0-3.3VDC
GND
Divide
by 3.
From Remote
analog Current
Control
CCM
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
J26
GND
+10.0V R1
10K
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
J55
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
J56
GCM 1000 XT
(125)
(126)
(127)
Auto-Cut XT Power Supply
(AC 300 XT)
R1
10K
AC 200 XT
105 Not Used. This is one of the reserved codes from the earlier product.
106 Pilot Timeout, no Transfer
Pilot time is limited to either 0.0�5 seconds (�5 ms.) with CCM SW�-1 off (default for pierce starting) or 3 seconds with
SW�-1 on (used for cutting over holes, expanded metal, etc.). Arc must transfer before pilot time ends. Code 10� is set
if no arc transfer (current in work lead) was sensed before pilot timed out. If the unit does not detect pilot current the arc
starter will operate up to 15 seconds then set the 102 code. If you are getting 10� there is pilot current somewhere. If it’s
not visible perhaps it’s inside the consumables or following some other part.
Causes for 10� code:
No Pilot Visible:
• Pilot inside the consumables
Visible Pilot:
• First the obvious, make sure the work lead is connected both to the work and the power supply. Also make sure the
work itself is making good electrical contact with cutting table. If rusty or painted metal, you may need to clean a spot
and attach the work lead directly to the metal.
• Torch too far from work.
• Cut current set too low for torch parts being used. Pilot current is set based on cut current. If cut current is too low
pilot current will be lower and may not transfer at the height used for higher current consumables.