Miller Electric SHOPMATE 300 DX User manual

Processes
MIG (GMAW)
Flux Cored (FCAW)
Stick (SMAW)
DC Lift-Arc™TIG (GTAW)
Light Industrial Applications
Recreational Vehicle
Trailer Manufacturing
MRO—Maintenance/Repair
Education
Farm/Home
Quick
Specs
Shopmate™300 DX Multiprocess Welding
Power Sources
Issued September 2010 • Index No. DC/12.7
Built-in 10-pin connector for
direct hookup of Spoolmatic®
15A or 30A spool guns.
Large, dual digital meters
enable the operator to preset
weld voltage in CV mode and
amperage in the CC mode
before striking an arc.
Arc control adjusts inductance to
optimize MIG arc performance.
Line voltage compensation
keeps output power constant
even if input power varies ±10%.
Built-in 14-pin connector
provides quick, direct connection
for 14-pin 24 VAC Miller wire
feeders and accessories.
Fan-On-Demand™operates only
when needed reducing noise,
power consumption, and the
amount of airborne contaminants
pulled through the machine.
The Power of Blue® .
Power source is warranted for 3 years, parts and labor.
Original main power rectified parts are warranted for 5 years.
Input Power 1-Phase Power
(primary power cord not included)
Rated Output 250 A at 30 VDC, 60% Duty Cycle
300 A at 32 VDC, 40% Duty Cycle
Amperage Range in CC Mode 5–400 A
Max. Open-Circuit Voltage 80 VDC
Voltage Range in CV Mode 10–35 VDC
Weight 177 lb (80.3 kg)
Single-phase MIG or DC
multiprocess capability for
versatility with outstanding arc
performance in CV mode (MIG)
and CC mode (Stick and TIG).
Process selector switch.
“Operator-friendly” single
process switch eliminates
confusion caused by several
switch combinations.
Lift-Arc TIG™allows DC/TIG
starting without the use of
high-frequency. Starts the arc
without contaminating the
weld with tungsten.
Miller Electric Mfg. Co.
An Illinois Tool Works Company
1635 West Spencer Street
Appleton, WI 54914 USA
Web Site
www.MillerWelds.com
Equipment Sales US and Canada
Phone: [phone]
FAX: [phone]
International Phone: [phone]
International FAX: [phone]

2
Arc Control – Inductance/MIG
Arc Control – DIG/Stick
Specifications (Subject to change without notice.)
Rated Output
250 A at 30 VDC,
60% Duty Cycle
Amperage
Range
5–400 A
Voltage
Range
10–35 V
Max. Open-
Circuit Voltage
80 VDC
Amps Input at Rated Output, 60 Hz
208 V 230 V 460 V 575 V KVA KW
66 57 29 23 13 11.2
Dimensions
H: 24-1/2 in (622 mm)
including lift eye
W: 19 in (483 mm)
D: 25-1/2 in (648 mm)
Net
Weight
177 lb
(80.3 kg)
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TIG MIG
STICK
LIFT-ARC
TIG™
VOLTA G E
VOLTAGE
AMPERAGE
PANE L
OUTPUT CONTROL
AMPERAGE
ARC CONTROLPOWER
OFF
REMOTE 10
REMOTE 14
REMOTE 14
CBI
REMOTE
ON
1
2
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9
10
ELECTRODE HOT
WELDING AMPS
% DUTY CYCLE
DUTY CYCLE CHART
500
450
400
350
300
250
200
150
5010 20 30 908070605040 100
100
Performance Data Control Panel
1. Ammeter
2. Voltmeter
3. Power Switch
4. Arc Control
5. Voltage/Amperage Adjustment Control
6. Remote 10 Receptacle
7. Supplementary Protector CBI
8. Remote 14 Receptacle
9. Voltage/Amperage Control Switch
Control allows selection of either
panel or remote 14 for amperage or
voltage control.
10. Mode Switch
Switch determines both the process
and output On/Off control. Electrode
hot areas in gray are “contactor on”
positions.
Example: Preset for MIG process and steel wire
Control adjusts inductance for MIG welding.
Set Arc Control to desired wire type. Inductance
determines the “wetness” of the weld puddle.
As setting is increased (rotating Arc Control
clockwise), wetness (puddle fluidity) increases.
For best results, preset Arc Control to the wire
type. Then either increase or decrease setting
within wire type scale to make fine adjustment
to the welding arc.
Example: Stick Mode, 7018 Electrode
Control adjusts Dig when Stick mode is selected
on mode switch. Set Arc Control to desired
electrode type. For best results, preset Arc
Control in middle of the scale for appropriate
electrode type. Then either increase or decrease
setting within electrode type scale to make fine
adjustment to the welding arc.
ARC CONTROL
TIG MIG
STICK
LIFT-ARC
TIG™
ELECTRODE HOT
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ARC CONTROL
TIG MIG
STICK
LIFT-ARC
TIG™
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ELECTRODE HOT
Arc Control
(Counter Clockwise)
Low Inductance
Weld Bead
Arc Control
(Clockwise)
High Inductance
Weld Bead
Certified to both the Canadian and U.S. Standards for welding equipment.
Note: For input conductor and fuse size information consult the Owner’s Manual.

3
Upgrade Benefits
Features
Input Voltage
Input Amperage at Rated Output
Rated Output
Process
Arc Control
Wirefeed System
Millermatic®252
1-Phase
42 A, 230 VAC (1-Phase)
200 A at 60%
MIG
Active Arc
Stabilizer
All in one,
2 drive rolls
Shopmate 300 DX
1-Phase
57 A, 230 VAC (1-Phase)
250 A at 60%
MIG, DC Stick, DC TIG
MIG—variable inductance
Stick—variable DIG
14-pin remote
Miller wire feeder
Upgrade Upgrade
Upgrade
Upgrade
Upgrade
Millermatic®350P
1-Phase/3-Phase
61 A, 230 VAC (1-Phase)
300 A at 60%
MIG, Pulsed MIG
MIG—inductance control
Pulsed— SharpArc®(arc width)
All in one, angled
4 drive rolls
Upgrade
Shopmate™300 DX MIG Package Components
Shopmate 300 DX MIG Package
#951 076 200(208)/230 V
#951 077 230/460/575 V
Comes Complete With:
Shopmate 300 DX
22A wire feeder with Bernard®Q300
15 ft (4.6 m) gun
MIG Kit #300 150 including:
• 15 ft (4.6 m) 1/0 work cable with clamp
• 10 ft (3 m) 1/0 interconnecting cable
• Ar/CO2regulator with flowtube
• 10 ft (3 m) gas hose
• Consumable storage box
Note: MIG Kit can be ordered separately.

4
Genuine Miller Accessories
Wire Feeders
22A #951 190
24A #951 193
Simple, reliable, constant-speed 24 VAC
semiautomatic wire feeders, best suited for
small diameter wires. Accommodates up
to 60 lb (27.2 kg) spool of welding wire
when using optional wire reel assembly.
24A includes remote voltage and four
gear-driven drive rolls for larger wire sizes.
22A and 24A wire feeders come with FREE
Bernard®Q™-Gun! See Lit. Index No. M/11.0.
70 Series
Single Wire Models
S-74S #951 196
S-74D #951 198
S-74DX #951 200
Dual Wire Models
D-74S #951 203
D-74D #951 204
D-74DX #951 206
Heavy-duty, industrial, constant-speed
24 VAC semiautomatic wire feeders in
single and dual models, with available
digital meters. Ideal for high-duty-cycle
MIG welding (GMAW) and Flux Cored
welding (FCAW). Accommodates a wide
variety of wire sizes and types. Comes with
FREE Bernard®Q™-Gun! Dual wire feeder
models include two FREE Q-Guns. See Lit.
Index No. M/3.0.
XR™-S Control #300 601
XR™-D Control #300 678
Updated push-pull wire feed systems offer
unsurpassed performance and reliability for
feeding aluminum and other difficult-to-feed
wire types. The perfect choice for use with
basic CV MIG power sources. See Lit. Index
No. M/1.7.
Shopmate™300 MIG Kit #300 150
Includes 15 ft (4.6 m) 1/0 work cable with
clamp, 10 ft (3 m) 1/0 interconnecting
cable, Ar/CO2regulator with flowtube,
10 ft (3 m) gas hose and consumable
storage box.
Spoolmatic®15A Spool Gun #195 156
Spoolmatic®30A Spool Gun #130 831
Ideal for aluminum welding jobs. 200 amp,
100% duty cycle, air-cooled, 1 lb spool
gun with your choice of 15 ft (4.6 m) or
30 ft (9.1 m) cable assembly. For detailed
information, see Lit. Index No. M/1.73.
Spoolmate™200 Spool Gun
#300 497
Reliable and economical spool gun perfect
for hobbyists and light fabricators who
weld aluminum. Handles .030–.035 in
(0.8– 0.9 mm) aluminum and .023–.035 in
(0.6– 0.9 mm) steel/stainless steel wires.
Rated at 160 amps, 60% duty cycle with 20 ft
cable assembly. For detailed information,
see Spoolmate literature, Index No. M/1.47.

5
Genuine Miller Accessories (Continued)
Shopmate™300 Running Gear/
Dual Cylinder Rack #300 145
The large 10 in (254 mm) rear wheels and
4 in (102 mm) front casters on this running
gear provide excellent mobility on the shop
floor, making it easier to move the power
source around and over cables and cracks.
Very easy to install. Handles double as weld
cable holder. Holds two cylinders.
Remote Controls and Switches
RMLS-14 #129 337
Momentary- and maintained-contact rocker
switch for contactor control. Push forward
for maintained contact and back for
momentary contact. Includes 20 ft (6 m)
cord and 14-pin plug.
RCC-14 Remote Contactor and Current
Control #151 086
Rotary-motion (side to side) fingertip
control. Fastens to TIG torch using two
Velcro strips. Allows complete current and
contactor control at operator’s fingertips.
Includes 28 ft (8.5 m) cord and plug.
RCCS-14 Remote Contactor and Current
Control #043 688
Up-and-down rotary-motion fingertip
control. Great for applications that require
a finer amperage control. Includes 28 ft
(8.5 m) control cord.
RHC-14 Hand Control
#129 340 20 ft (6 m) cord
Miniature hand control with 14-pin plug
for remote current and contactor control.
Dimensions: 4 x 4 x 3-1/4 in (102 x 102 x
82 mm).
RFCS-14 Foot Control #043 554
Heavy-duty foot current and contactor
control. Includes 20 ft (6 m) cord and
14-pin plug.
Extension Cables for 14-Pin Plugs to
14-Pin Sockets
#242 208 025 25 ft (7.6 m)
#242 208 050 50 ft (15.2 m)
#242 208 080 75 ft (22.8 m)
This extension cord makes a direct
connection between the power source and
the accessory control or wire feeder. No
messy splicing or adapting required.
No. 2 Stick Cable Set
#195 196 15 ft (4.6 m)
Consists of 15 ft (4.6 m) No. 2 electrode
cable and holder, and 15 ft (4.6 m) work
cable and clamp. 200 A, 100% duty cycle.
No. 2 Stick Cable Set
#300 836 50 ft (15.2 m)
Consists of 50 ft (15.2 m) No. 2 electrode
cable and holder, and 50 ft (15.2 m) work
cable and clamp. 200 A, 100% duty cycle.
TIG (GTAW) Torches
Weldcraft®TIG Torches
The Weldcraft line of TIG
torches complements the
most popular TIG power
source line available today. The Weldcraft
torch line includes both air-cooled and
water-cooled models. Available with
genuine Weldcraft parts.
Air-Cooled Torch #WTP17VRM
150 amp air-cooled TIG torch with valve,
flowmeter and 25 ft (7.6 m) cables.
Air-Cooled Torch #WTP26VRM
200 amp air-cooled TIG torch with valve,
flowmeter and 25 ft (7.6 m) cables.
TIG (Gas Tungsten Arc Welding) Handbook
#170 555
To order, call the Miller Literature
Distribution Center at 1-920-751-2120, or
FAX [phone]. A comprehensive,
text on all aspects of the TIG process.

Notes
6

7
Notes

Litho in USA
Distributed by:
Ordering Information
Equipment and Options Stock No. Description Qty. Price
Shopmate™300 DX #907 315 200(208)/230 V, 60 Hz
(primary power cord not included) #907 316 230/460/575 V, 60 Hz
Shopmate™300 DX MIG Package #951 076 200/230 V, 60 Hz model with 22A wire feeder, Bernard®Gun and MIG Kit.
(primary power cord not included) #951 077 230/460/575 V, 60 Hz model with 22A wire feeder, Bernard®Gun and MIG Kit.
Accessories
Shopmate™300 MIG Kit #300 150 15 ft (4.6 m) 1/0 work cable with clamp, 10 ft (3 m) 1/0 interconnecting cable,
regulator with flowtube, 10 ft (3 m) gas hose and consumable storage box
Standard Running Gear/ #300 145
Dual Cylinder Rack
Wire Feeders/Guns
22A #951 190 See Lit. Index No. M/11.0
24A #951 193 See Lit. Index No. M/11.0
70 Series See page 4
XR™-Controls #300 601 XR-S. See Lit. Index No. M/1.7
#300 678 XR-D. See Lit. Index No. M/1.7
Spoolmatic®15A #195 156 See Lit. Index No. M/1.73
Spoolmatic®30A #130 831 See Lit. Index No. M/1.73
Spoolmate™200 #300 497 See Lit. Index No. M/1.47
Remote Controls
RMLS-14 #129 337 Rocker switch
RCC-14 #151 086 Fingertip control (side to side)
RCCS-14 #043 688 Fingertip control (up and down)
RHC-14 #129 340 Hand control w/20 ft (6 m) cord and 14-pin plug
RFCS-14 #043 554 Foot control
Extension Cables See page 5
No. 2 Stick Cable Set #195 196 15 ft (4.6 m)
No. 2 Stick Cable Set #300 836 50 ft (15.2 m)
TIG Welding
Weldcraft®TIG Torches #WTP17VRM 150 A, 25 ft (7.6 m) air-cooled with valve and flowmeter
#WTP26VRM 200 A, 25 ft (7.6 m) air-cooled with valve and flowmeter
Educational Resources
TIG (Gas Tungsten Arc Welding) Handbook #170 555
Date: Total Quoted Price: