Pro-Weld CD-312 Specifications

OPERATION/ MAINTENANCE
MANUAL
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TABLE OF CONTENTS
1.0
INTRODUCTION
1
2.0
WARRANTY
1
3.0
UNPACKING YOUR UNIT
1
4.0
SUGGESTED SAFETY PRECAUTIONS
1
5.0
GENERAL DESCRIPTION
2
6.0
THE CD WELDING PROCESS
2
7.0
POWER REQUIREMENTS
3
8.0
SYSTEM SPECIFICATIONS
3
9.0
WELDING SYSTEM HOOK-UP
9.1
Straight Polarity
9.2
Reverse Polarity
9.3
Cuphead Pin
4
4
5
6
10.0
SYSTEM OPERATION
7
11.0
GUN SET-UP
11.1
Standard
11.2
Installing or Changing Collets or Chucks
11.3
For Weld Pins with Collet Protector
11.4
Template Adapter
11.5
Collet Protector with Blunt Leg
11.6
Parts List LD CD Handgun
9
9
10
10
11
11
14
12.0
WELDABLE MATERIAL COMBINATIONS
15
13.0
CAUSES OF POOR OR ERRATIC WELDS
16
14.0
TROUBLE SHOOTING POOR WELDS
16
15.0
ROUTINE WELDER MAINTENANCE
17
16.0
ASSEMBLY –CD-312 CONTROLLER
16.1
PC Board Assembly Drawing
18,19,20
21
17.0
TROUBLE SHOOTING – ELECTRICAL
22
18.0
CHECK LIST CD-312 SYSTEM P.N. 100-0108
24
19.0
CHECK LIST CD-312 SYSTEM P.N. 100-0109
24
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LIST OF FIGURES
1
CD CONTACT PROCESS
2
2
STRAIGHT POLARITY HOOK-UP
4
3
REVERSE POLARITY HOOK-UP
5
4
CUPHEAD PIN HOOK-UP
6
5
FRONT PANEL LAYOUT
7
6
STANDARD GUN SETUP
9
7
COLLET PROTECTOR SETUP
10
8
TEMPLATE ADAPTER GUN SETUP
11
9
COLLET PROTECTOR/BLUNT LEG SETUP
11
10
LIGHT DUTY CD GUN
13
11
HOT WELD
16
12
COLD WELD
16
13
ARC BLOW
17
14
WELD WITHOUT FOOTPIECE
17
15
GOOD WELD
17
16
PARTS LIST
18
17
PARTS LIST (continued)
19
18
PARTS LIST (continued)
20
19
PC BOARD
21
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1.0 INTRODUCTION
Your new stud welding equipment is carefully
constructed of the finest components and materials
available. Used properly, this equipment will give
you years of profitable, efficient service.
The system incorporates the latest in engineering advances, for completely reliable end welding of
mild steel, stainless steel, aluminum and lead free
copper and brass fasteners.
A careful study of this manual will enable you
to understand how the welder operates to insure
proper performance under all operating conditions.
2.0 WARRANTY
The electrical and mechanical components of
the stud welder are thoroughly performance inspected prior to assembly in the welder. The assembled welder is completely performance checked. The
welder is delivered to you in functional electromechanical condition.
All parts used in the assembly of the welder
and its accessories are fully warranted for a period of
1 YEAR from the date of delivery. In addition, the
welding capacitors are warranted for a period of 1
YEAR from the date of delivery. The printed circuit
boards used in all proweld equipment are warranted
for a period of 3 years.
Under the warranty, the manufacturer reserves
the right to repair or replace, at their option, defective parts which fail during the guarantee period.
Notice of any claim for warranty repair or replacement must be furnished to the manufacturer by the
purchaser within ten (10) days after the defect is first
discovered. The manufacturer does not assume any
liability for paying shipping cost or any labor or materials furnished where such cost are not expressly
authorized in writing.
The manufacturer does not warrant any parts or
accessories against failures resulting from misuse,
abuse, improper installation, maladjustment, or use
not in accordance with the operating instructions furnished by the manufacturer. The warranty is valid
only when studs are purchased from sources approved by the manufacturer or are of identical specifications to the manufacturer’s
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3.0 UNPACKING YOUR UNIT
Upon receipt of your unit, place it as close as
possible to the point of installation before unpacking
it. Do not operate the unit from an extension power
cord if possible. Once the unit is unpacked it is recommended that you inspect it for any physical damage.
Your unit has been completely assembled and
inspected at the factory. Upon receipt, the unit must be
hooked up to the recommended incoming power before welding. We recommend that you check that you
have received all the items listed on the shipping
check list. (see SECTION 18 or 19)
Place the unit in a large enough area to provide
adequate ventilation. Do not restrict the air flow
through the side louvers. Do not allow water to enter
the control housing.
4.0 SUGGESTED SAFETY PRECAUTIONS
In any welding operation, it is the responsibility of the welder to observe certain safety rules to insure his personal safety and to protect those working
near him.
Reference is directed, without endorsement or
recommendation, to ANSI Z49.1, Safety in Welding
and Cutting, and to AWG Publication A6,1-66, Recommended Safety Practices for Gas-Shield Arc Welding.
1. Always treat electricity with respect. Under
open circuit conditions, the welding machine
output voltage may be dangerous.
2. Don’t work on live circuits or conductors.
Disconnect the main power line before checking the machine or performing any maintenance operations.
3. Be sure the welding machine cabinet is
properly grounded to a good electrical ground.
4. Don’t stand in water or on a damp floor
while welding or weld in the rain. Avoid wearing wet sweaty cloths when welding.
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5. Don’t operate with worn or poorly connected cables. Don’t operate weld gun with
loose cable connections. Inspect all cables frequently for insulation failures, exposed wires,
loose connections, and repair as needed.
6. Don’t overload welding cables or continue
to operate with hot cables.
7. Don’t weld near flammable materials or liquids, in or near atmospheres, or on ducts carrying explosive gases.
8. Don’t weld on containers which have held
combustible or flammable materials, or on materials which give off flammable or toxic vapors when heated, without proper cleaning,
purging, or inerting.
9. Be sure to provide for proper ventilation
when welding in confined spaces.
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110 volt AC line voltage. The system comes complete
with power cord, weld cables and gun. Just add the
accessories required for the stud size to be welded.
This manual should provide all the information required for you to be able to set up, weld, and maintain
the CD-312 welding system.
6.0 THE CD WELDING PROCESS
Contact welding is the simplest and most
common method of CD stud welding. Practically
foolproof, it produces no reverse side marking in
most cases and is suitable for most commercial and
industrial applications.
First, the gun must be set-up with the proper
accessories for the length and diameter stud you are
going to weld. Refer to the CD Accessories Guide
and CD Stud Welding Gun Section for information
on accessories and gun set-up.
1
2
10. Never look at the electric arc without wearing protective eye shields.
Initial Contact
11. Always use the proper protective clothing,
gloves, ect.
12. Never strike an arc when near a bystander
who is unaware of the dangers of ultraviolet
light on their eyes.
5.0 GENERAL DESCRIPTION
CD-312 HEAVY DUTY PORTABLE
CD STUD/PIN WELDER
The CD-312 portable CD welder is a self contained heavy duty capacitor discharge power supply
capable of welding up to 5/16” flanged studs in mild
steel or stainless steel (3/8” in weld base diameter).
It can weld up to 1/4 flanged studs (5/16” weld base
diameter) in aluminum or brass.
The CD-312 utilizes a solid state control board
for longer life and has been designed for easy maintenance and field service. This welder uses standard
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During Weld
3
4
Forced Into Molten Pool
After Weld
(FIGURE 1 CONTACT CD WELD)
The stud is first placed in contact with the
base material (SEE FIGURE 1). Verify that the gun is
held perpendicular to the work. Pulling the trigger
discharges the capacitors through the stud which vaporizes the tip. The proper tip design is critical. This
is what determines the length of time of the weld. An
arc is briefly sustained which melts the stud base surface and the work surface directly underneath the
stud. The spring pressure in the gun then forces the
stud into the molten pool, completing the weld in approximately six milliseconds.
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This technique, when equipment is set up properly,
is simple and easily mastered. The same power supply is capable of welding many different sizes and
materials of fasteners. If you require assistance in
selecting the proper accessories, contact our customer service department or your field representative.
7.0 POWER REQUIREMENTS
110 VOLT OPERATION
110 volt AC 60 H:
25 amp service
Internal :
20 amp;
circuit breaker
(P/N: 104-0021)
Integral 9 foot power cord
IF EXTENSION REQUIRED
Cable Length
110 Volt
12’
#16/3
25’
#16/3
30’
#14/3
50
#12/3
8.0 SYSTEM SPECIFICATIONS
Weight:
48 Lbs.
Size:
8 1/2” W x 10” D x 16 1/2” H
21.6 cm W x 25.4 cm D x 42 cm H
Chassis:
16 Ga. Steel (Painted International Orange)
Panel Controls:
Power
Voltage Control
Weldable Materials:
Steel, Stainless steel, Aluminum, Copper,
Brass, Zinc coated, Galvanized
Weldable Stud Diameter:
12 Ga. Through 3/8” Weld Base
(Max W.B. Dia. For AL=5/16” {1/4” thread})
Weld Rate:
24 per minute 5/16”
Weld Voltage:
45-185 VDC
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Capacitance:
88,000 uF nominal
Weld Mode:
Contact
Polarity:
Straight or Reverse
Power Required:
110 Volt AC 60 Hz 25 Amp
Internal Fusing:
20 Amp Circuit Breaker
3AG 1 Amp 250 volt (2 on PC board)
STANDARD GUN & CABLE SPECIFICATIONS
WELD GUN-LIGHT DUTY PRECISION
CD CONTACT
Part Number:
300-0100 B Collet Gun
300-0101 Taper Tip Gun
Weight:
2 lbs. (not including cable)
( lbs. (including 25 ft. #4 weld cable & 16-4
SOW control cable)
Size:
6 1/2” x 5 3/4” x 2”
Weldable Stud Diameter:
14 Ga. Through 1/4” Flanged
Material:
High strength, impact resistant, glass fiber reinforced polycarbonate
Integral Gun Cable Length:
25 feet – #4 AWG
Connectors:
Male Camlok / 2 Pin Hubbell Male
Cables
Ground Cable:
(1) #4 x 15’
(P/N: 125-0100)
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9.0 WELDING SYSTEM HOOK-UP
9.1
Straight Polarity (Standard Set-Up) (see Figure 2)
A. Connect ground cable connector (1A) into camlok (1). The camlok should be connected into the
receptacle marked GROUND. Twist until it locks. Attach “C” clamp (2) to the workpiece (5)
(CLEANED AREA).
B. Connect the gun control cable (3A) into the female receptacle (3).
C. Connect the gun weld cable (4A) into the receptacle marked GUN (4). Twist clockwise until it
locks.
D. Connect AC power cable to AC outlet.
NOTE:
The gun welding and control cables must be laid out in a straight line. Poor weld quality may result if
welding cables are coiled.
3
3A
4
4A
1
1A
2
5
Figure 2 Straight Polarity Hook-Up
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9.2 Reverse Polarity (Recommended for brass or galvanized) (see Figure 3)
A. Connect ground cable connector (1A) into camlok (4). The camlok should be connected into the
receptacle marked GUN. Twist until it locks. Attach “C” clamp (2) to the workpiece (5) (CLEANED
AREA).
B. Connect the gun control cable (3A) into the female receptacle (3).
C. Connect the gun weld cable (4A) into the receptacle marked GROUND (1). Twist clockwise until
it locks.
D. Connect AC power cable to AC outlet.
NOTE:
The gun welding and control cables must be laid out in a straight line. Poor weld quality may result if
welding cables are coiled.
3
3A
1
1A
4
4A
2
5
Figure 3 Reverse Polarity Hook-Up
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9.3
Cuphead and Power Point pin hook-up (see Figure 4)
A. Connect ground cable connector (1A) into camlok (1). The camlok should be connected into the
receptacle marked CUPHEAD. Twist until it locks. Attach “C” clamp (2) to the workpiece (5)
(CLEANED AREA).
B. Connect the gun control cable (3A) into the female receptacle (3).
C. Connect the gun weld cable (4A) into the receptacle marked GUN (4). Twist clockwise until it
locks.
D. Connect AC power cable to AC outlet.
NOTE:
The gun welding and control cables must be laid out in a straight line. Poor weld quality may result if
welding cables are coiled.
3
3A
4
4A
1
1A
5
2
Figure 4 Cuphead Pin Hook-Up
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10.0 SYSTEM OPERATION
(see Figure 4)
1.
The CD-312 is designed for simple, yet precise operation.
2.
It has an “ON-OFF” toggle switch/indicator light (1) and a variable voltage control dial (2), a
ready indicator light (3), a contact light (4) and a trigger light (5) on the front panel.
3.
Before turning the unit “ON”, the voltage control knob (2) should be turned counter-clockwise
to the lowest setting.
4.
With all cables connected, turn the unit on by putting the rocker switch (1) in the “ON” position. The integral indicator light (1) will turn on.
5.
When the capacitors reach the charge voltage setting, the ready light (4) will turn on.
2
1
3
4
5
Figure 5 Front Panel Layout
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Setting the Weld Voltage/Capacitance
Slowly turn the voltage control knob
clockwise to increase the weld voltage until the
indicator knob is pointing at the appropriate
number for the particular stud size that you are
welding. (See the set up information chart).
NOTE:
Once the voltage control knob is set to
a higher setting, turning it counter-clockwise
will NOT reduce the voltage on the capacitor
bank, until the toggle switch (1) is turned
“OFF” (for approximately 10 seconds).
The settings are marked with the voltages corresponding to various stud sizes. The
approximate voltages for each stud size is as
follows:
45 – 60 VDC
Min.
65 – 95 VDC
12 ga.
95 – 120 VDC
#8
120 – 145 VDC
#10
145 – 180 VDC
1/4”
180 – 185VDC
MAX.
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The voltage charge on the capacitor bank is read on
the digital panel meter. The ready light indicates
when the capacitors are charged and a stud may be
welded.
Contact Light
The contact light indicates there is an acceptable electrical connection between the stud and
ground. This light will turn on when the stud is
placed in contact with the ground.
Trigger Light
The trigger light indicates there is a complete circuit to the unit through the gun control cable and switch. This light will turn on when the gun
trigger is pressed.
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11.0 GUN SET-UP
11.1 STANDARD (see Figure 5)
The standard gun set-up is used for welding the
majority of applications. It consists of the standard
adjustable face plate, two legs, a foot, B-collet, stop,
and spring for your specific stud size.
A step-by-step explanation of the correct way
to set-up and operate the standard CD gun.
To prepare for stud welding, it is necessary to
have the proper accessories for the stud to be
welded. Those required are the legs, footpiece,
spring, collet, and appropriate screws and washers.
A 3/32” and a 5/32” hex wrench are the only tools
needed for the adjustment of the gun.
Figure 6 Standard Gun Setup
For CD welding, the stud normally should be
engaged for all but 1/4” of its length, whenever possible. Selecting the proper stop will accomplish this
for you. The objective of the collet is to maintain a
firm grip on the fastener to assure correct alignment
and a good electrical connection, yet allow for ease
of loading.
Once the selection of the correct accessory is
made, assembly may begin. The footpiece is
mounted on the legs using 10-32 x 3/4” socket head
cap screws, inserted through the holes at the base of
the footpiece. These holes are recessed so that the
head of the screws will not protrude.
After assembling the legs and footpiece, insert
the collet and stop into the open end of the gun shaft.
Secure the collet in place with two set screws on the
shaft. Locate the legs, with footpiece attached, in the
holes provided in the gun faceplate. (It
may be necessary to back off the
socket screw in the faceplate to allow
the legs to enter the hole). Center the
opening of the footpiece around the
weld end of the fastener. Tighten the
footpiece in position at this time. Adjustment for the plunge which is the
distance the stud protrudes beyond the
end of the footpiece can now be made.
This is done by loosening the two 1032 x 1/4” set screws at the bottom of
the faceplate using the 3/32” Allen
wrench. Then sliding the legs for
proper adjustment. Refer to the set-up
chart for correct plunge distance (from
1/8” to 5/16”).
NOTE:
Correct set-up on all CD units is
1/8”- 5/16” plunge. This must be assured for proper weld results in all
cases.
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The gun is now ready to weld. Select the
proper setting for the size stud to be welded. Voltage
is determined by the weld base diameter. Be sure
your power source is set for the proper polarity:
straight for steel, reverse for galvanized.
11.2 INSTALLING OR CHANGING COLLETS
OR CHUCKS
( The terms collet or chuck are different names for
the same device). The collet holds the pin or stud to
be welded. It is secured to the gun shaft by two set
screws. These screws are loosened to remove or replace a collet. Tighten these screws snugly to secure
the collet in place.
When you change the size of the stud you are
welding, you must also change to the appropriate
collet. If a collet becomes damaged or broken, it
must be replaced. You may also need a stop.
11.3 GUN SET-UP FOR WELD PINS WITH
COLLET PROTECTOR (see Figure 6)
The collet protector has several advantages
over the standard set-up.
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1. It does not require a pin stop.
therefore, the same setup is applicable
for a range of pin lengths.
2. There is a fixed plunge, no gun
adjustments necessary.
3. It provides stability at the weld end
of the pin.
There are two standard sizes available: 12 ga.
And 10 ga. It is used with the round faceplate and
three blunt legs. The collet protector slides over the
collet and fastens to the chuck with three allen set
screws. The insert, which takes the place of the Interal stop, is replaceable.
The stud is pushed into the chuck until the flange bottoms out on the insert. The collet protector is not
available for studs larger than 10 ga.
The standard adjustable legs and footpiece
combination can alternately be used with the collet
protector as shown in Figure 7.
Figure 7 Collet Protector Gun Setup
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11.4 TEMPLATE ADAPTER (see Figure 7)
The template adapter is used when precise
location or positioning of the CD stud is required.
It is used with the round faceplate and does not require a footpiece or legs. The adapter is fastened to
the faceplate and provides a fixed distance between the collet and work. The plunge is set by using the correct stop in the collet. A template can
then be fabricated to enable very precise locating
of a particular stud.
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11.5 COLLET PROTECTOR/BLUNT LEG
(see Figure 8)
The round faceplate, with blunt legs, can alternately be used with the collet protector as shown in
Figure 8.
The template adapter is available in two
sizes, (1” and 1-1/4” diameter).
Figure 9 Collet Protector/Blunt Leg Setup
Figure 8 Template Adapter gun setup
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Figure 10 Light Duty CD Gun
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11.6 PARTS LIST LIGHT DUTY CD HANDGUN
Part No. 300-0100
ITEM PART NO.
DESCRIPTION
QTY
1
033-384
GUN (CD) REAR CAP MOLDED
1
2
001-800
SPRING MAIN HEAVY SILVER
1
3
033-610
GUN (CD/DA) BEARING ASSEMBLY
1
4
033-799
GUN (CD) SHAFT TUBE
1
5
033-016
HEX HEAD CAP SCREW
3
6
033-382
GUN (CD/DA/FA) TRIGGER SPRING
1
7
049-955
M SCREW SET MS, BRASS PLT
2
8
NOT USED GUN (CD/DA/FA) CABLE CLAMP (ALUM. BLOCK)
1
9
033-404
TRIGGER SWITCH
1
10
033-381
GUN (CD/DA/FA) TRIGGER BUTTON MOLDED
1
11
036-496
GUN (FL) SHAFT BLOCK – A
1
12
033-662-25
GUN WELD CABLE (25 FT.)
1
13
033-658-25
GUN CONTROL CABLE (25 FT.)
1
14
033-881
GUN BODY RH & LH STD.CD MACHINED
1
15
033-445
GUN (CD/FL) SHAFT BOOT ASSY
1
16
033-447
GUN (CD) SHAFT BOOT RETAINING RING
1
17
033-665
GUN (CD) FACEPLATE – STD. ADJUSTABLE
1
18
033-446
GUN (CD) SHAFT BOOT SNAP RING
1
19
033-608
GUN (CD) WELD PIGTAIL ASSY
1
20
018-375
SCREW PAN HEAD
2
21
016-876
WASHED, LOCK INTO. TOOTH
1
22
033-757
LEG (CD) STD.ADJ. 7”
2 REF.
23
009-929
FLAT WASHER
2 REF.
24
016-378
SOCKET HEAD CAP SCREW
2 REF.
25
028-833
STD. FOOTPIECE
1 REF.
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12.0 WELDABLE MATERIAL COMBINATIONS
BASE MATERIAL
STUD MATERIALS
Mild Steel (1008-1018)
Mild Steel 1008, 1018
Stainless Steel 304, 305
Brass 65-35, 70-30
Copper, Silicon/Bronze
Galvanized Sheet (duct-”Q” Decking
Mild Steel 1008-1018
Stainless Steel 304,305
Structural Steel (Must Be Clean)
Mild Steel 1008,1018
Stainless Steel 304,305
Brass 65-35, 70-30
Aluminum – Most alloys of the
1100, 3000 and 5000 series.
Aluminum 1100,5356
Zinc Alloys (Die Cast)
Aluminum 1100, 5356
Medium Carbon Steel (1030-1018)
Mild Steel 1008, 1018
Stainless Steel 304,305
Brass 65-35, 70-30
Lead Free Brass
Lead Free Rolled Brass
Electrolytic Copper
Mild Steel 1008, 1018
Stainless Steel 304, 305
Copper, Silicon/Bronze
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13.0 CAUSE OF POOR OR ERRATIC
WELDS
12. Incorrect spring. (REPLACE WITH PROPER
SPRING)
1. Loose collet. Does not grip stud tightly.
(REPLACE) Not enough engagement of stud to collet. (CHANGE STOP)
13. Poor stud quality.
2. Fault or loose ground connection. (REPAIR OR
TIGHTEN)
14.0 TROUBLE SHOOTING POOR
WELDS
3. Poor surface condition of base material, excessive
oil, grease, rust, ect. (CLEAN)
4. Voltage or capacitance setting too low or too high.
(ADJUST TO DIAMETER OF STUD)
5. Broken or loose cables. (REPAIR)
6. Dirt in gun. (CLEAN)
7. Incorrect polarity. (CABLES HOOKED-UP
WRONG)
8. Use of center punch or deep scribe. (DO NOT
USE CENTER PUNCH OR DEEP SCRIBES)
Figure 11 Weld too Hot
Weld too Hot
A) Decrease voltage.
B) Decrease capacitance.
C) Increase stud protrusion.
D) Increase spring pressure.
9. Cables too closely coiled.
10. Arc blow is evidenced by “one side” welds. In
severe cases there will be no melting under one edge
of flange while the opposite side is gouged out or
appears excessively hot. The principle cause of arc
blow is magnetic field induced by the current flow
during the weld. It occurs most often on long, narrow strips of metal or near edges of sheets or plates.
In some cases, a change in grounding positions, or
two grounds on the work piece, one at each end or
edge of work, will correct the problem. For assistance in severe cases, contact your local sales representative.
11. Incorrect plunge setting. (ADJUST TO PROPER
SETTING)
Figure 12 Weld too Cold
Weld too Cold
A) Increase voltage.
B) Increase capacitance.
C) Decrease stud protrusion.
D) Decrease spring pressure.
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15.0 ROUTINE WELDER
MAINTENANCE
Your CD-312 is designed for long service
with minimum care. Ordinary common sense maintenance will keep it operating efficiently.
Figure 13 Arc Blow
Arc Blow
A) Use double grounds.
B) Ground too close or not spaced
Figure 14 Weld without footpiece
1. Treat the welding, ground, and control cables with respect. Avoid sharp bends and kinks which
may break the cables. Don’t use the cables as a “tow
line” to move the control. Avoid damage or straining
the cables where they enter the gun or at the connectors.
2. It is good practice to occasionally remove
the cover of the controller and clean with air and a
soft brush around the components.
CAUTION
Be sure the controller is disconnected
from the power before removing the protective cover.
Weld without footpiece
A) Use standard footpiece.
B) Use template adapter.
C) Use tripod blunt legs.
3. While the cover is removed, tighten all the
weld cable connections and make sure all the screws
on the capacitor terminals are torque to 30 inchpounds.
NOTE:
Keep the gun free of
dust, dirt or foreign
material
Figure 15 Good Weld
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16.0 ASSEMBLY CD-312 CONTROLLER (see Figure 15,16, & 17)
1A
1
7
2
3
4
5
6
Figure 16 Parts List
ITEM
1
1A
2
3
4
5
6
7
DESCRIPTION
Knob
Charge Pot 25K
SCR Mounting
Main SCR
Buss Bar
Buss Bar
Capacitor
Chassis
PART NUMBER
102-0060
111-0001
124-0026
108-0001
124-0037
124-0036
106-0023
101-0016
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14
8
9
15
10
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17
16
11
12
13
Figure 17 Parts List
ITEM
8
9
10
11
12
13
14
15
16
17
PAGE 18
DESCRIPTION
Terminal Strip
Transformer
Dropping Resistor
Discharge Resistor
Nichrome Resistor
PC Board
Charging SCR
Diode
Charging Bridge
Safety Discharge SCR
PART NUMBER
102-0020
105-0010
112-0042
112-0041
112-0043
600-0007
108-0002
108-0027
108-0017
108-0042
PRO
WEL D
CD -3 1 2
20
19
21
18
22
23
24
Figure 18 Parts List
ITEM
18
19
20
21
22
23
24
DESCRIPTION
Power Switch
LED Panel Meter
LED Red
LED Green
LED Amber
2-Pole Female Hubbell
Female Camlok
PART NUMBER
104-0013
103-0002
108-0028
108-0029
108-0030
107-0031
107-0002
PAGE 19
PRO
WEL D
CD -3 1 2
16.1 PC BOARD ASSEMBLY DRAWING
FU2 and FU3 are 3AG 1 ampere fuses
R18
R28
R27
R31
+
ZD4
ZD3
R3
R1
R2
R5
ZD2
D1
ZD1
R9
OP2
R6
R20
R32
R26
D9
V7
R40
C9
D23
R41
R22
+
D16
ZD5
D18
D20
D22
D17
D19
R35
FU3
FU2
Figure 19 PC Board
PAGE 20
+
C7
V6
R37
R39
R38
R23
R8
D3
R33
D14
OP3
R19
D13
R36
D21
D8
VR1
+
C6
V4
C4
V5
+
D6
D2
C5
D10
D7
V1
C1 C2
R16
R15
V3 V2
R17
C3
R7
R12
R11
R25
R42
R30
R29
R43
D11
+
OP4
R10
R13
R4
D5
D4
R14
OP1
R24
R44
R34
PRO
WEL D
CD -3 1 2
17.0 TROUBLE SHOOTING – ELECTRICAL
When troubleshooting the power unit/controller (welder), the following precautions must be observed:
1. Welder must be TURNED OFF!
2. Unplug power cable from welder and wait at least two minutes before checking components.
3. The use of a volt/ohmmeter is recommended where any voltage may be present.
4. Use a continuity tester ( or troubleshooting light) for continuity checks only.
5. Possible causes marked with a star (*) are generally the most common problems.
PROBLEM
POSSIBLE CAUSE
CORRECTIVE ACTION
1. Welder does not turn on
and will not weld.
A. Power connections at
Welder or 110 VAC outlet
not complete.
Check connections.
*B. Broken power cable or
loose wire connection in
the plug.
Check wires for continuity.
Repair break.
C. Fuse blown.
Replace fuse.
*A. Shorted weld capacitor.
Check safety vent seal for
Rupture hole. Replace
defective capacitor.
B. Shorted rectifier (BR1)
Check for a short across the
rectifier with ohmmeter.
Replace rectifier module if
shorted.
C. Incorrect primary hookup.
Check transformer connections.
D. Shorted transformer
assembly.
Replace transformer.
2. Fuse blows each time
unit is turned on.
PAGE 21
PRO
WEL D
CD -3 1 2
PROBLEM
POSSIBLE CAUSE
CORRECTIVE ACTION
3. Welder turns on but
does not operate
A. Ground cable connections
not complete.
Check for continuity
*B. Broken gun control cable
or loose wire connection
in the plug. Shorted or
open trigger switch.
Check continuity between
pins on control plug while
trigger is depressed.
Should read continuity.
*C. Faulty printed circuit
board.
Replace with new PC
Board.
D. Shorted weld SCR.
Check with ohmmeter
(should not show continuity
in either direction). Replace
rectifier module if shorted.
A. Shorted charge SCR.
Check with ohmmeter
( should not show continuity
In either direction). Replace
if shorted.
*B. Faulty printed circuit
board.
Replace with new PC
Board.
C. Open voltage
potentiometer.
Replace defective voltage
Potentiometer.
A. Improper gun setup.
Check applicable gun setup
Instruction page.
B. Improper grounding or
cable setup or incorrect
polarity.
Check applicable cable setup
Instruction page.
C. Weld cables are coiled.
Straighten out cables.
D. Incorrect voltage setting.
Adjust as necessary.
E. Studs or pins not
perpendicular to work
surface.
Adjust legs as necessary.
Replace defective legs.
4. Weld is excessively hot
regardless of voltage
setting.
5. Poor and erratic
welding.
PAGE 22
PRO
WEL D
CD -3 1 2
18.0 CHECK LIST CD-312 SYSTEM PT. NO. 100-0108
STANDARD CD-312 WELDING SYSTEM COMPLETE WITH B-COLLET GUN
AND 25’ #4 GROUND CABLE
ITEM
1.
2.
3.
4.
5.
DESCRIPTION
PART #
QTY
CD-312 CONTROLLER 110 VAC
GUN ASSY. B-COLLET w/INTEGRAL 25 FT.WELD
& CONTROL CABLE 2-LEGS, and FOOTPIECE
GROUND CABLE #4 X 15’
MANUAL, Operation and Maintenance CD-312
HEX WRENCH SET
200-0012
1
300-0100
125-0100
1
1
1
1
19.0 CHECK LIST CD-312 SYSTEM PT. NO. 100-0109
STANDARD CD-312 WELDING SYSTEM COMPLETE WITH TAPER TIP GUN
AND 25’ #4 GROUND CABLE
ITEM
1.
2.
3.
4.
5.
DESCRIPTION
PART #
QTY
CD-312 CONTROLLER 110 VAC
GUN ASSY. TAPER TIP w/INTEGRAL 25 FT.WELD
& CONTROL CABLE 2-LEGS, and FOOTPIECE
GROUND CABLE #4 X 15’
MANUAL, Operation and Maintenance CD-312
HEX WRENCH SET
200-0012
1
300-0101
125-0100
1
1
1
1
PAGE 23
MANUFACTURED BY
PRO
WELD
MADE IN THE U.S.A.