Hypertherm HT4400 Technisches Datenblatt

To achieve maximum nozzle life

With careful use, the standard 300-amp or 400-amp

nozzle will last as long as the new SilverPlus electrode.

Pierce at correct height: Piercing too low causes

molten metal (spatter) to build up on the nozzle,

causing damage to the orifice. This is the most

common cause of premature nozzle failure. Piercing

too high can cause slow arc transfer and misfires. In

most applications, a pierce height of 1/4" (6 mm) –

3/8" (10 mm) works well.

Adjust gas flows: Preflow gas protects the nozzle

from damage, especially during piercing. Make sure

the preflow settings are adjusted according to the

cut chart.

Adjust arc voltage: As parts wear, increase arc

voltage in 5-volt increments to keep the nozzle from

dragging on the plate. Damage to the nozzle may

occur if the torch contacts the plate during cutting.

To achieve maximum SilverPlus electrode life

A fully used SilverPlus electrode will have a pit depth of

.080" (2 mm), versus the recommended .040" (1 mm)

pit depth for standard parts.

Purge torch: After each consumable part change, purge

the torch for at least 30 seconds to remove residual

moisture, which will damage the silver electrode.

Adjust gas flows: Plasma gas flow rate is critical.

High flow will cause rapid electrode wear and hard

starting. Low flow will cause uncontrolled arcing.

(See charts below)

Adjust arc voltage: As the electrode wears, the torch

will get closer to the plate. To compensate for this,

increase arc voltage in 3 to 5-volt increments, up to

15 volts higher than the initial setting.

Avoid ramp-down errors: Ramp-down errors can

occur when ending cuts off the plate or when leading

out of dropped parts as the arc stretches. These

“blowouts” shorten electrode life by 10 or more

starts per occurrence.

Part

number Description

1. 220412 Electrode, 300/400-amp oxygen

2. 120939 Swirl ring, 400-amp oxygen

3. 120940 Swirl ring (ccw), 400-amp oxygen

4. 120913 Swirl ring, 300-amp oxygen

5. 120914 Swirl ring (ccw), 300-amp oxygen

6. 120934 Nozzle, 400-amp oxygen

7. 120935 Nozzle (ccw), 400-amp oxygen

8. 120794 Nozzle, 300-amp oxygen

9. 120795 Nozzle (ccw), 300-amp oxygen

10. 120786 Retaining cap

11. 120907 Retaining cap, with IHS tab

12. 120984 Retaining cap, underwater

SilverPlus is a proven technology that dramatically

extends electrode life and significantly reduces operating

cost. This remarkable technological advance is now

available on the HT4400 HySpeed®plasma system

cutting with 300-amp and 400-amp oxygen process.

2, 3, 4, 5.

6, 7, 8, 9.

10, 11.

12.

HT4400, 300-amp cut chart

MV1 MV2 MV3 MV4 MV5 MV6 MV7 PG1 PG2 PG1 PG2 (in) (mm) volts (in) (mm) ipm mm/m in. mm seconds

1/4** 6** 120 0.062 2 190 4830 0.13 3 0.3

3/8** 10** 125 0.125 3 160 4060 0.25 6 0.5

1/2 12 130 0.157 4 120 3050 0.31 8 0.7

5/8 15 135 0.188 5 100 2540 0.38 10 0.9

3/4 20 140 0.188 5 80 2030 0.38 10 1.1

7/8 22 145 0.188 5 70 1780 0.38 10 1.3

1 25 145 0.188 5 55 1400 0.38 10 1.5

1-1/8 30 150 0.188 5 50 1270 * * *

1-1/4 32 155 0.25 6 45 1140 * * *

1-1/2 35 155 0.25 6 35 890 * * *

20 42 46 3524 35 3546 0 0 10

Pierce

delay

time

Plasma Shield Plasma Shield Arc

voltage

Torch-to-

work

distance

Cutting

speed

Initial

pierce

height

Test preflow and cutflow adjust (psi) Test

preflow

verify (psi)

Test

cutflow

verify (psi)

Material

thickness

HT4400®SilverPlusTM

Quick Set-up

Hypertherm, HySpeed, HT and SilverPlus

are trademarks

of Hypertherm Inc., and may be registered in the United

States and/or other countries.

891690

Hypertherm, Inc.

Hanover, NH 03755 USA

603-643-3441 Tel

Hypertherm (S) Pte Ltd.

417847, Republic of Singapore

65 6 841 2489 Tel

Hypertherm (Shanghai)

Consulting Co.

Shanghai 200120

86-21-5835-5362 /3 Tel

Hypertherm Europe B.V.

4704 SE Roosendaal, Nederland

31 165 59 69 07 Tel

HYPERTHERM BRASIL LTDA.

Guarulhos, SP - Brasil

55 11 6482 1087 Tel

www.hypertherm.com

HT4400, 400-amp cut chart

MV1 MV2 MV3 MV4 MV5 MV6 MV7 PG1 PG2 PG1 PG2 (in) (mm) volts (in) (mm) ipm mm/m in. mm seconds

3/8** 10** 135 0.125 3 195 4950 0.25 6 0.4

1/2** 12** 138 0.157 4 160 4060 0.31 8 0.5

5/8 15 140 0.157 4 120 3050 0.31 8 0.6

3/4 20 142 0.157 4 95 2413 0.31 8 0.7

7/8 22 145 0.188 5 80 2032 0.38 10 0.8

1 25 145 0.188 5 70 1778 0.38 10 1

1-1/8 30 145 0.188 5 60 1520 0.38 10 1.4

1-1/4 32 148 0.188 5 55 1400 0.38 10 1.9

1-1/2 35 150 0.188 5 40 1020 * * *

40 155 0.188 5 37 929 * * *

50 175 0.25 6 17 421 * * *

2 175 0.25 6 15 381

36 43 68 38

Initial

pierce

height

Pierce

delay

time

68 0 0 10 43 38 38

Material

thickness Arc

voltage

Torch-to-

work

distance

Cutting

speed

Test

preflow

verify (psi)

Test

cutflow

verify (psi)

Test preflow and cutflow adjust (psi)

Plasma Shield Plasma Shield

Half-used electrode

Whereas a standard copper

electrode would be fully used, this

SilverPlus electrode is only half

consumed. The pit in the center of

the part measures .040" (1 mm).

Electrodes are often removed

prematurely due to cut quality

deterioration caused by nozzle

damage. A new nozzle will restore cut

quality and allow full electrode use.

Fully-used electrode

This SilverPlus electrode has provided

full use. The pit depth is .080" (2 mm).

The operator increased the arc voltage

by 15 volts from the first cuts made

with this electrode to the last. This

maintains a constant distance

between the torch and the work piece

through the life of the electrode.

.040" (1 mm) .080" (2 mm)

* Piercing is not recommended.

** Cuts on these thicknesses may result in increased cut angle variation and surface

roughness. Reduce cut speeds by 5–10% for improvement with some materials.

0 100 200 300 400 500 600 700 800

CoolCore

SilverPlus

> Range 5

Range 5

Range 4

300-amp oxygen20/20 parts life and cut quality

(Cut quality overlife of consumables)

20-second tests with 20% rampdownerrors

on3/4" (20 mm) steel

400-amp oxygen20/20 parts life and cut qualit

(Cut quality overlife of consumables)

20-second tests with 20% rampdownerrors

on3/4" (20 mm) steel

CoolCore

SilverPlus

0 100 200 300 400 500

> Range 5

Range 5

Range 4

The cut quality ranges, shown in these test results, meet the

ISO 9013-2002 industrial standard that defines cut quality of

thermally cut parts. This standard defines how cut angles are

measured. The lower the range (Range 1 is lowest), the

smaller the angle on the cut face. Range 4 represents an angle

of approximately 3.75 and range 5 is approximately 6 degrees.

> Range 5 is above 6 degrees.

SilverPlus

CoolCore

Relative consumable cost of cut

3/4" (19 mm) mild steel at 400 amps

Consumable cost perfoot

Length of cut

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