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Ht4001 sequence of operation (cont.), Maintenance – Hypertherm HT4001 Plasma Arc Cutting System User Manual

Page 136

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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