Miller Electric SSW-2020 ATT User Manual

SSW Series Spot Welders	Issued April 2009 • Index No. SW/3.1
	Spot Welders
	Water-Cooled Resistance

Quick

Specs

Applications

Sheet Metal Work

Light Fabrication

Maintenance Work

Process

Resistance Spot Welding

Work Capacity 20 kVA units

weld total thicknesses up to 1/4 in (6.3 mm). Not recommended for aluminum or copper alloys.

The Power of Blue®.

SSW models are designed for stationary use and come with an all-steel pedestal which houses timers and controls.

SSW models come complete with:

Stationary welding head

Remote foot switch

Pedestal inclusive of controls and timer

Air filter/regulator assembly Order tongs/tips separately to match your applications

Set-up/weld switch permits checking of tong pressure and alignment without making a weld.

Built-in squeeze/weld timer makes it quick and easy to set or adjust squeeze and/or weld time in hundredths of a second.

LED display makes it easy to read and see timer settings.

Air filter/regulator assembly included.

Rated Output 20 kVA at 40% duty cycle depending on model, based on 10-second time period

Weight SSW 170 – 185 lb (77 – 84 kg) Depending on model

SSW foot switch permits user to use both hands to position weldment between tongs. Can be held longer if longer hold time is desired.

All spot welders operate on single-phase input power, and require an air supply of 60 PSI (414 kPa) minimum.

Adjustable tong pressure nuts to adjust tong pressure for different thicknesses and applications.

Power switch/power “on” light/circuit breaker protects control circuitry. Easy reset.

Cam-operated locking device simplifies installation and adjustment of bottom tong.

Ten-step current control adjusts output current with no change in duty cycle.

Specifications (Subject to change without notice.)

	Input	Work	Rated	Rated Output (Calibrated w/ standard-type tongs)			Max. Open-	Dimensions	Net
Model	50/60 Hz	Capacity*	Output**	6 in (152 mm)	12 in (305 mm) 18 in (457 mm)		Circuit Voltage	H x W x D	Weight
SSW-2020 ATT	230 VAC	1/4 in	20 kVA at	12,500 A	10,500 A	9000 A	3.55	49 x 11 x	185 lb
Stationary	90 Amps	(6.3 mm)	40% Duty					21-3/4 in	(84 kg)
			Cycle					(1245 x 280
SSW-2040 ATT	460 VAC
								x 552 mm)
Stationary	45 Amps
*Combined thickness uncoated mild steel using 6 in (152 mm) tongs.
**Duty Cycle based on 10-second time period. (40% duty cycle means unit can weld for 4 second out of each 10-second time period.)

					Miller Electric Mfg. Co.	Equipment Sales US and Canada	Web Site
					An Illinois Tool Works Company	Phone: [phone]	www.MillerWelds.com
					1635 West Spencer Street	FAX: [phone]
					Appleton, WI 54914 USA	International Phone: [phone]
						International FAX: [phone]

	Control Panel
1							4
2						5

3

1.Power “On” Light/Circuit Breaker/Switch

2.Fuse to Protect Control Transformer

3.Weld Amperage Control

4.LED Display

5.Set-Up/Weld Switch

Place rocker switch in Set-Up position to check tong pressure and alignment without making weld.

Place in Weld position when ready to activate actual squeeze and weld time.

LED Display

SPOT TIMER

4	3	2	1

ST WT

First row of LEDs displays actual times.

Second row of LEDs displays squeeze time set or weld time set.

Sets times from 9.99 to 0.01 seconds

WT Selector Button Set weld time with buttons (3), (2), (1).

ST Selector Button

Set squeeze time with buttons (3), (2), (1). Set enough time for tongs to close before weld amperage starts.

Genuine Miller Accessories

Coolmate V3

Coolmate 3

Coolmate 4

Tip Dresser #040 228

For use with pointed tips.

Water Coolant Systems

For more information, see the Miller Coolant Systems literature sheet, Index No. AY/7.2.

Coolmate™ 3

#043 007 115 VAC

#043 008 230 VAC

For use with water-cooled torches rated up to 600 amps. Unique paddle-wheel indicator, external filter and easy-fill spout.

Coolmate™ V3 #043 009 115 VAC

For use with water-cooled torches rated up to 500 amps. Vertical design conveniently mounts to Miller cylinder rack in place of one cylinder.

Coolmate™ 4 #042 288

For use with water-cooled torches rated up to 600 amps. Tough molded polyethylene case with carrying handle.

Coolants

#043 810 Coolant, low-conductivity #043 809 Coolant, aluminum protecting Sold in cases of four 1-gallon recyclable plastic bottles. Miller coolants contain a

base of ethylene glycol and deionized water to protect against freezing to -37˚F (-38˚C) or boiling to 227˚F (108˚C). Both also contain a compound that resists algae growth.

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