Miller Electric MARKVI User Manual
Processes
Stick (SMAW) CC
TIG (GTAW) CC
Air Carbon Arc (CAC-A)
Cutting and Gouging CC
Flux Cored (FCAW) CV
MIG Spray Transfer (GMAW)
with Voltage-Sensing Feeder CV
Heavy Industrial Applications
Construction
Rental Fleets
Fab Shops
Petro Chemical
Shipbuilding
Training Facilities
Maintenance
Quick
Specs
Rugged and durable enclosure
steel frame protects system.
Mark VI
Multiple Arc
Welding System
Issued January 2006 • Index No. DC/9.8
Work connections are electrically isolated
from the frame, and service panels in
chassis provide easy access to internal
parts for routine maintenance.
Capable of four to six welding arcs,
Miller’s unique modules are designed
for easy removal and connection.
If you need only four arcs today,
purchase the Mark VI-2. If you
have a requirement for more arcs,
additional modules (CC or CV)
are available for purchase.
Optional Low OCV in CC/CV modules reduces maximum
open-circuit voltage to 26 volts in CC and CV modes when
not welding.
The Power of Blue®.
Miller Electric Mfg. Co.
An Illinois Tool Works Company
1635 West Spencer Street
Appleton, WI 54914 USA
Web Site
www.MillerWelds.com
International Headquarters
Phone: 920-735-4505
USA FAX: 920-735-4134
Canadian FAX: 920-735-4169
International FAX: 920-735-4125
Voltage Range CC: 20–315 A
CV: 10–30 V (with CC/CV Module)
Max. Open-Circuit Voltage
CC: 75 VDC CV: 38 VDC
CC/CV Low OCV Module: 26 VDC ±2 V
Weight Mark VI: 1725 lb (784 kg)
Mark VI-2: 1575 lb (718 kg)
Adjustable arc control lets you get in
tight without sticking the electrode. An
electrode compensation circuit ensures
arc control performance regardless of
the electrode size.
Multiple capabilities CC or CC/CV.
Versatility and outstanding arc
welding performances in both CV
(MIG) and CC (TIG and Stick). The
CC/CV module has a high quality
arc for welding with cored wires.
Miller does not recommend that
the CC/CV module be used for short
circuit transfer MIG welding. The CC
module has the same great arc
characteristic as the Gold Star 302.
Operator identification label helps
operators remember who is using
which module.
Welder is warranted for 3 years, parts and labor.
Original main power rectified parts are warranted for 5 years.
14-pin receptacle provides quick, direct
connection to Miller wire feeders and
accessories.
Weighs less than one ton which
makes it portable when secured on a
flatbed, construction truck, or when
moved by one-ton hoist. Fits through
36 in (914 mm) door opening.
60 Hz models have two 115 V GFCI duplex
receptacles which supply 15 amps of
auxiliary power. 50 Hz models have one
220 V and one 115 V duplex receptacle.
Line voltage compensation keeps
output power constant even if primary
input power varies by ±10%, ensuring
consistent weld performance.
Hot Start
™
makes it easy to start difficultto-start Stick electrodes, such as E-6010
and E-7018.
2
Control Panel
Performance Data
Specifications (Subject to change without notice.)
DC Amperage/
Voltage Range
20–315 A
in CC Mode
10–30 V in
CV Mode with
CC/CV Module
Max. Open-Circuit
Voltage (DC)
75 VDC in CC Mode
38 VDC in CV Mode
with CC/CV Module
26 VDC ±2 V
with CC/CV Module
and low OCV
Amps Input at 750 Amps Output, 50/60 Hz
230 V 380 V 400 V 415 V 440 V 460 V 575 V KVA KW
164 97 92 91 84 82.5 66.1 65.2 41.9
Dimensions
H: 65 in
(1651 mm)
W: 56-3/4 in
(1442 mm)
D: 34-1/4 in
(870 mm)
Net
Weight
Mark VI :
1725 lb
(784 kg)
Mark VI-2:
1575 lb
(718 kg)
Rated Welding Output
at 44 Volts DC
Single Module
250 A at 60% Duty Cycle
Main Transformer
60 Hz: 750 A at 100% Duty Cycle
1500 A at 25% Duty Cycle
50 Hz: 750 A at 60% Duty Cycle
1160 A at 25% Duty Cycle
8
7
UPPER PANEL FOR CC UNITS
LOWER PANEL
6
4
5
1
2
3
SINGLE MODULE
VOLTS 30
AMPERES 250
DUTY CYCLE 60%
MAX OCV 75 VDC
TOTAL MACHINE
60Hz - 750 Amps @ 100% Duty Cycle
50Hz - 750 Amps @ 60% Duty Cycle
6
8
4
5
7
1
2
3
UPPER PANEL FOR CC/CV UNITS
LOWER PANEL
SINGLE MODULE
VOLTS 30
AMPERES 250
DUTY CYCLE 60%
MAX OCV 75 VDC
TOTAL MACHINE
60Hz - 750 Amps @ 100% Duty Cycle
50Hz - 750 Amps @ 60% Duty Cycle
1. Arc Force Control
2. Remote/On Output Contactor Control
3. Remote/Panel Output Amperage Control
4. Hot Start On/Off Switch
5. Amperage Adjustment Control
6. High-Temperature Shut Off Indicator
7. 14-Pin Remote Receptacle
8. Power On/Off Switch
1. Arc Force Control
2. Remote/On Output Contactor Control
3. Remote/Panel Output Amperage Control
4. Process Selector
5. Amperage/Voltage Adjustment Control
6. High-Temperature Shut Off Indicator
7. 14-Pin Remote Receptacle
8. Power On/Off Switch
CC VOLT/AMP CURVES
FOR EACH MODULE
DC VOLTS
DC AMPS
80
60
40
20
0
0 100 200 300 400 500
CV VOLT/AMP CURVES
FOR EACH MODULE
VOLTS
AMPS
80
70
60
50
40
30
20
10
0
0 100 200 300 400 500 600 700
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