Hypertherm HT4001 Plasma Arc Cutting System - Manual (Page 136)

MAINTENANCE
8-97
6-10
HT4001
Instruction Manual
HT4001 Sequence of Operation (cont.)
From
Page
6-9
STOP command given
Arc transfers;
CR1 (PA relay) opens;
SV2 (N
2
Preflow) OFF;
SV3 (O
2
Preflow) OFF;
SV4 ( Preflow/Cut Flow) ON;
HF coil deactivated.
Machine motion begins;
Cutting begins.
CR1 (PA relay) opens
SV2 (N
2
Preflow) OFF
SV3 (O
2
Preflow) OFF
HF coil deactivated
SCRs activated in slave.
Water Muffler
pump OFF.
CON1 and CON2 (Contactors) OFF;
CH1, CH2, CH3, CH4 (Choppers) OFF;
SCRs OFF (if slave is in system)
SV4 (Preflow/Cut Flow) OFF;
SV5 (Plasma Off) OFF;
SV6 (Water Injection) OFF;
Machine motion stops.
Plate overrun
Torch close
to plate?
Slave part of
system?
Water Muffler
installed?
Yes
No
No
Yes
Yes
SV6 (Shield On) OFF;
Sequence complete.
No No