Hypertherm SilverPlus HT4400 Quick Setup

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
cutting with 300-amp and 400-amp oxygen process.
HT4400
1.
2, 3, 4, 5.
6, 7, 8, 9.
1. 220412
2. 120939
3. 120940
4. 120913
10, 11.
5. 120914
6. 120934
12.
7.
8. 120794
9. 120795
10. 120786
11. 120907
12. 120984
HT4400, 300-amp cut chart
Test preflow and cutflow adjust (psi)
Plasma Shield Plasma
MV1 MV2 MV3 MV4 MV5
46 0 0 10 24
plasma system
®
SilverPlus
®
Quick Set-up
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
Electrode, 300/400-amp oxygen
Swirl ring, 400-amp oxygen
Swirl ring (ccw), 400-amp oxygen
Swirl ring, 300-amp oxygen
Swirl ring (ccw), 300-amp oxygen
Nozzle, 400-amp oxygen
120935 Nozzle (ccw), 400-amp oxygen
Nozzle, 300-amp oxygen
Nozzle (ccw), 300-amp oxygen
Retaining cap
Retaining cap, with IHS tab
Retaining cap, underwater
Test Test
preflow cutflow
Shield
verify (psi) verify (psi)
MV6 MV7 PG1 PG2 PG1 PG2
35 35 20 42 46
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.
Torch-to -
Material Arc
thickness voltage
distance
(in) (mm) volts (in)
1/4** 6** 120 0.062
3/8** 10** 125 0.125
1/2 12 130 0.157
5/8 15 135 0.188
3/4 20 140 0.188
35 7/8 22 145 0.188
1 25 145 0.188
1-1/8 30 150 0.188
1-1/4 32 155 0.25
1-1/2 35 155 0.25
TM
Initial
Cutting
work pierce
speed
height
(mm) ipm mm/m in. mm
2 190 4830 0.13
3 160 4060 0.25
4 120 3050 0.31
5 100 2540 0.38
5 80 2030 0.38
5 70 1780 0.38
5 55 1400 0.38
5 50 1270 *
6 45 1140 *
6 35 890 *
Pierce
delay
time
seconds
3 0.3
6 0.5
8 0.7
10 0.9
10 1.1
10 1.3
10 1.5
* *
* *
* *