ESAB CM-37B Machine Carriage User manual
- Category
- Welding System
- Type
- User manual
CM-37B
Machine Carriage
Instruction Manual
For the following ESAB part numbers:
High speed machine carriage (5.0 to 65 ipm) - P/N 948371
Low speed machine carriage (1.0 to 25 ipm) - P/N 2227025
F12-884-D 10 / 2004
2
This equipment will perform in conformity with the description thereof contained in this manual and accompa
-
nying labels and/or inserts when installed, operated, maintained and repaired in accordance with the instruc-
tions provided. This equipment must be checked periodically. Malfunctioning or poorly maintained equipment
should not be used. Parts that are broken, missing, worn, distorted or contaminated should be replaced imme-
diately. Should such repair or replacement become necessary, the manufacturer recommends that a telephone
or written request for service advice be made to the Authorized Distributor from whom it was purchased.
This equipment or any of its parts should not be altered without the prior written approval of the manufacturer.
The user of this equipment shall have the sole responsibility for any malfunction which results from improper
use, faulty maintenance, damage, improper repair or alteration by anyone other than the manufacturer or a ser
-
vice facility designated by the manufacturer.
BE SURE THIS INFORMATION REACHES THE OPERATOR.
YOU CAN GET EXTRA COPIES THROUGH YOUR SUPPLIER.
These INSTRUCTIONS are for experienced operators. If you are not fully familiar with the
principles of operation and safe practices for arc welding and cutting equipment, we urge
you to read our booklet, “Precautions and Safe Practices for Arc Welding, Cutting, and
Gouging,” Form 52-529. Do NOT permit untrained persons to install, operate, or maintain
this equipment. Do NOT attempt to install or operate this equipment until you have read
and fully understand these instructions. If you do not fully understand these instructions,
contact your supplier for further information. Be sure to read the Safety Precautions be-
fore installing or operating this equipment.
CAUTION
USER RESPONSIBILITY
3
TABLE OF CONTENTS
1.0 Safety Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
1.1 Safety - English . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
1.2 Safety - Spanish. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
1.3 Safety - French. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
2.0 Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
17
2.1 CM-37B Cutting Machine. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
2.1.1 Required Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
2.1.2 Optional Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
2.2 CM-37B / SM-2 Cutting Machine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
2.2.1 Required Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
2.2.2 Optional Accessories. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
3.0 Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19
4.0 Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
5.0 Maintenance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
5.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
5.2 Checking or Replacement of Carriage Gearmotor Brushes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
6.0 Replacement Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
27
6.1 General. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
6.2 Ordering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Section / Title Page
4
TABLE OF CONTENTS
5
SECTION 1 SAFETY PRECAUTIONS
1.0 Safety Precautions
1.1 Safety - English
WARNING: These Safety Precautions are
for your protection. They summarize pre-
cautionary information from the references
listed in Additional Safety Information sec-
tion. Before performing any installation or operating
procedures, be sure to read and follow the safety
precautions listed below as well as all other manuals,
material safety data sheets, labels, etc. Failure to observe
Safety Precautions can result in injury or death.
PROTECT YOURSELF AND OTHERS --
Some welding, cutting, and gouging
processes are noisy and require ear
protection. The arc, like the sun, emits
ultraviolet (UV) and other radiation
and can injure skin and eyes. Hot metal can cause
burns. Training in the proper use of the processes
and equipment is essential to prevent accidents.
Therefore:
1. Always wear safety glasses with side shields in any
work area, even if welding helmets, face shields, and
goggles are also required.
2. Use a face shield fitted with the correct filter and
cover plates to protect your eyes, face, neck, and
ears from sparks and rays of the arc when operat
-
ing or observing operations. Warn bystanders not
to watch the arc and not to expose themselves to
the rays of the electric-arc or hot metal.
3. Wear flameproof gauntlet type gloves, heavy long-
sleeve shirt, cuffless trousers, high-topped shoes,
and a welding helmet or cap for hair protection, to
protect against arc rays and hot sparks or hot metal.
A flameproof apron may also be desirable as protec-
tion against radiated heat and sparks.
4. Hot sparks or metal can lodge in rolled up sleeves,
trouser cuffs, or pockets. Sleeves and collars should
be kept buttoned, and open pockets eliminated from
the front of clothing.
5. Protect other personnel from arc rays and hot
sparks with a suitable non-flammable partition or
curtains.
6. Use goggles over safety glasses when chipping slag
or grinding. Chipped slag may be hot and can fly far.
Bystanders should also wear goggles over safety
glasses.
FIRES AND EXPLOSIONS --
Heat from
flames and arcs can start fires. Hot
slag or sparks can also cause fires and
explosions. Therefore:
1. Remove all combustible materials well away from
the work area or cover the materials with a protec
-
tive non-flammable covering. Combustible materials
include wood, cloth, sawdust, liquid and gas fuels,
solvents, paints and coatings, paper, etc.
2. Hot sparks or hot metal can fall through cracks or
crevices in floors or wall openings and cause a hid-
den smoldering fire or fires on the floor below. Make
certain that such openings are protected from hot
sparks and metal.“
3. Do not weld, cut or perform other hot work until the
workpiece has been completely cleaned so that there
are no substances on the workpiece which might
produce flammable or toxic vapors. Do not do hot
work on closed containers. They may explode.
4. Have fire extinguishing equipment handy for instant
use, such as a garden hose, water pail, sand bucket,
or portable fire extinguisher. Be sure you are trained
in its use.
5. Do not use equipment beyond its ratings. For ex-
ample, overloaded welding cable can overheat and
create a fire hazard.
6. After completing operations, inspect the work area
to make certain there are no hot sparks or hot metal
which could cause a later fire. Use fire watchers when
necessary.
7. For additional information, refer to NFPA Standard
51B, "Fire Prevention in Use of Cutting and Welding
Processes", available from the National Fire Protec-
tion Association, Batterymarch Park, Quincy, MA
02269.
ELECTRICAL SHOCK -- Contact with
live electrical parts and ground can
cause severe injury or death. DO NOT
use AC welding current in damp areas,
if movement is confined, or if there is
danger of falling.
6
SECTION 1 SAFETY PRECAUTIONS
1. Be sure the power source frame (chassis) is con-
nected to the ground system of the input power.
2. Connect the workpiece to a good electrical
ground.
3. Connect the work cable to the workpiece. A poor
or missing connection can expose you or others
to a fatal shock.
4. Use well-maintained equipment. Replace worn or
damaged cables.
5. Keep everything dry, including clothing, work
area, cables, torch/electrode holder, and power
source.
6. Make sure that all parts of your body are insulated
from work
and from ground.
7. Do not stand directly on metal or the earth while
working in tight quarters or a damp area; stand
on dry boards or an insulating platform and wear
rubber-soled shoes.
8. Put on dry, hole-free gloves before turning on the
power.
9. Turn off the power before removing your gloves.
10. Refer to ANSI/ASC Standard Z49.1 (listed on
next page) for specific grounding recommenda
-
tions. Do not mistake the work lead for a ground
cable.
ELECTRIC AND MAGNETIC FIELDS
— May be dangerous. Electric cur
-
rent flowing through any conduc-
tor causes localized Electric and
Magnetic Fields (EMF). Welding and
cutting current creates EMF around welding cables
and welding machines. Therefore:
1. Welders having pacemakers should consult their
physician before welding. EMF may interfere with
some pacemakers.
2. Exposure to EMF may have other health effects which
are unknown.
3. Welders should use the following procedures to
minimize exposure to EMF:
A. Route the electrode and work cables together.
Secure them with tape when possible.
B. Never coil the torch or work cable around your
body.
C. Do not place your body between the torch and
work cables. Route cables on the same side of
your body.
D. Connect the work cable to the workpiece as close
as possible to the area being welded.
E. Keep welding power source and cables as far
away from your body as possible.
FUMES AND GASES -- Fumes and
gases, can cause discomfort or harm,
particularly in confined spaces. Do
not breathe fumes and gases. Shield
-
ing gases can cause asphyxiation.
Therefore:
1. Always provide adequate ventilation in the work area
by natural or mechanical means. Do not weld, cut, or
gouge on materials such as galvanized steel, stain
-
less steel, copper, zinc, lead, beryllium, or cadmium
unless positive mechanical ventilation is provided.
Do not breathe fumes from these materials.
2. Do not operate near degreasing and spraying opera
-
tions. The heat or arc rays can react with chlorinated
hydrocarbon vapors to form phosgene, a highly
toxic gas, and other irritant gases.
3. If you develop momentary eye, nose, or throat ir
-
ritation while operating, this is an indication that
ventilation is not adequate. Stop work and take
necessary steps to improve ventilation in the work
area. Do not continue to operate if physical discom-
fort persists.
4. Refer to ANSI/ASC Standard Z49.1 (see listing below)
for specific ventilation recommendations.
7
SECTION 1 SAFETY PRECAUTIONS
5. WARNING: This product, when used for welding
or cutting, produces fumes or gases
which contain chemicals known to
the State of California to cause birth
defects and, in some cases, cancer.
(California Health & Safety Code
§25249.5 et seq.)
CYLINDER HANDLING -- Cylinders,
if mishandled, can rupture and vio-
lently release gas. Sudden rupture
of cylinder, valve, or relief device can
injure or kill. Therefore:
1. Use the proper gas for the process and use the
proper pressure reducing regulator designed to
operate from the compressed gas cylinder. Do not
use adaptors. Maintain hoses and fittings in good
condition. Follow manufacturer's operating instruc-
tions for mounting regulator to a compressed gas
cylinder.
2. Always secure cylinders in an upright position by
chain or strap to suitable hand trucks, undercar
-
riages, benches, walls, post, or racks. Never secure
cylinders to work tables or fixtures where they may
become part of an electrical circuit.
3. When not in use, keep cylinder valves closed. Have
valve protection cap in place if regulator is not con
-
nected. Secure and move cylinders by using suitable
hand trucks. Avoid rough handling of cylinders.
4. Locate cylinders away from heat, sparks, and flames.
Never strike an arc on a cylinder.
5. For additional information, refer to CGA Standard P-1,
"Precautions for Safe Handling of Compressed Gases
in Cylinders", which is available from Compressed
Gas Association, 1235 Jefferson Davis Highway,
Arlington, VA 22202.
EQUIPMENT MAINTENANCE -- Faulty or
improperly maintained equipment can
cause injury or death. Therefore:
1. Always have qualified personnel perform the instal
-
lation, troubleshooting, and maintenance work.
Do not perform any electrical work unless you are
qualified to perform such work.
2. Before performing any maintenance work inside a
power source, disconnect the power source from
the incoming electrical power.
3. Maintain cables, grounding wire, connections, power
cord, and power supply in safe working order. Do
not operate any equipment in faulty condition.
4. Do not abuse any equipment or accessories. Keep
equipment away from heat sources such as furnaces,
wet conditions such as water puddles, oil or grease,
corrosive atmospheres and inclement weather.
5. Keep all safety devices and cabinet covers in position
and in good repair.
6. Use equipment only for its intended purpose. Do
not modify it in any manner.
ADDITIONAL SAFETY INFORMATION -- For
more information on safe practices for
electric arc welding and cutting equip
-
ment, ask your supplier for a copy of
"Precautions and Safe Practices for Arc
Welding, Cutting and Gouging", Form
52-529.
The following publications, which are available from
the American Welding Society, 550 N.W. LeJuene Road,
Miami, FL 33126, are recommended to you:
1. ANSI/ASC Z49.1 - "Safety in Welding and Cutting"
2. AWS C5.1 - "Recommended Practices for Plasma Arc
Welding"
3. AWS C5.2 - "Recommended Practices for Plasma Arc
Cutting"
4. AWS C5.3 - "Recommended Practices for Air Carbon
Arc Gouging and Cutting"
8
SECTION 1 SAFETY PRECAUTIONS
5. AWS C5.5 - "Recommended Practices for Gas Tung-
sten Arc Welding“
6. AWS C5.6 - "Recommended Practices for Gas Metal
Arc Welding"“
7. AWS SP - "Safe Practices" - Reprint, Welding Hand
-
book.
8. ANSI/AWS F4.1, "Recommended Safe Practices for
Welding and Cutting of Containers That Have Held
Hazardous Substances."
MEANING OF SYMBOLS - As used
throughout this manual: Means Atten
-
tion! Be Alert! Your safety is involved.
Means immediate hazards which,
if not avoided, will result in im-
mediate, serious personal injury
or loss of life.
Means potential hazards which
could result in personal injury or
loss of life.
Means hazards which could result
in minor personal injury.
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17
SECTION 2 DESCRIPTION
2.0 Cutting Machine Description
2.1.1 Required Equipment
The CM-37B is a portable, heavy-duty, self propelled machine carriage, designed for straight line operation on a
heavy duty, precision tract. It is a prime mover for equipment used in flame cutting, flame treating, plate edge
preparation, and electric welding and cutting.
In cases where extreme accuracy of straight-line travel is not required, the CM-37B can be operated using a
standard S10 x 25.4 beam (not “H” beam) or a standard 10" channel as a track. The carriage wheels have been
designed so that they will ride on the edges of the beam flanges. The CM-37B can also be operated directly on
the surface of a plate (usually the workpiece itself).
The carriage speed range for P/N 948371 is from 5.0 to 65 inches per minute. The low speed assembly P/N
2227025 operates from 1.0 to 25 inches per minute. The carriage may be started or stopped by means of the
travel switch on the “J” governor, or by the clutch control levers located at each end of the carriage.
This powerful carriage allows dragging welding power cables, up to 150 feet long. This drive force is supplied
by a permanent magnet gearmotor coupled to a worm and worm-gear reduction. Torque is transmitted to the
drive axle through a spring-loaded jaw clutch. Both the drive axle and worm-drive shaft are mounted in ball
bearings to reduce friction and wear. An adjustable drag brake is provided on one of the drive wheels. This brake
maintains a constant minimum load in both directions so that gear backlash cannot cause erratic motion.
“J” Governor (P/N 953534), a solid state electronic speed control.
6-ft., 3-cond. cable (P/N 948305) to connect the “J” Governor to the carriage or, (P/N 2221903) 25 Ft.,
3 cond. cable, for remote operation.
1.
2.
Precision Track 6-ft. long (P/N 37V15) is intended for use where linearity is of prime importance.
Each track is equipped with dowel pins and sockets for accurate alignment of adjacent track sec
-
tions.
Adaptor Plate (P/N 948296): A 1/2-in. thick steel plate made to mount on top of the carriage. This
plate has hole patterns (see Figure 4) to enable a variety of cutting and welding equipment to be
mounted on the carriage.
1.
2.
2.1.2 Optional Accessories
2.1 CM-37B Cutting Machine
18
SECTION 2 DESCRIPTION
Figure 1 - CM-37B/SM-2 Cutting Machine
Swivel Turret Part No. 717585
Counter Weight (2) Part No. 717587
Regulation Panel Part No. 2116395
Precision Track (6 Ft.) Part No. 37V15
Hold Down Bracket (2 Req'd)* Part No. 2226588
Handle Part No. 2226589
Powder Cutting Contact ESAB for proper selection
Hose & Fittings Contact ESAB for proper selection
* The Hold Down Brackets can be used to maintain stability when
operating on a 10” I Beam Track with cantilevered loads.
2.2 CM-37B / SM-2 Cutting Machine
Adaptor Plate Part No. 948296
J-Governor Part No. 953534
Governor Cable (25 Ft.) Part No. 2221903
Mounting Base Part No. 687796
“U” Clamp (2) Part No. 687560
Cutting Torch Contact ESAB for proper selection
2.2.1 Required Accessories
The CM-37B / SM-2 Cutting Machine is ideally suited for low cost, semi-portable, straight-line cutting applica-
tions such as cropping, slitting, scrap cutting, etc. It can also be adapted for cutting most standard mill products
and is adaptable for use with OXWELD powder cutting equipment for cutting non-ferrous metals, alloy steels
and steel containing non-metallic inclusions.
The basis of the unit is the rugged CM-37B cutting carriage. The CM-37B is mated to the SM-2 motorized torch
holder for raising and lowering of the torch. Several different basic configurations are available including torch
support tubes of 3 ft. (.9 meter), 6-1/2 ft. (1.9 meter), and 10 ft. (3 meter). Both 60 Hz. and 50 Hz. versions avail
-
able.
2.2.2 Optional Accessories
19
SECTION 3 INSTALLATION
3.0 Installation
Carefully remove the carriage from the shipping container and place it on a clean flat surface. Re-
move all packing materials and check container for hardware.
Never roll the carriage by hand unless the gears are first dis-
engaged by moving the clutch lever toward the center of the
carriage.
Assemble the appropriate equipment on the machine carriage, using the supplied mounting hard-
ware.
Connect the required supply hose and cables. These should be supported in such a manner that a
minimum of drag is placed on the carriage.
Install carriage track. When the carriage travel is in excess of 58 inches, more than one length of track
will be required. Multiple lengths of CM-37 track can be used in two ways as a guide for the machine
carriage. One is to use several loose sections of track, “leapfrogging” them as the carriage proceeds
down its line of travel. The other is to construct a continuous track by fastening the desired number
of track sections end-to-end in a permanent or semi-permanent installation.
When installing the track, the important consideration is the accuracy of the supporting structure.
The support must provide the required smooth level surface, to preserve the accuracy of the track
construction. Any bolts or clamps used to hold the track to the support must not be permitted to
draw the rails out of line in any direction.
The track sections are placed in position, aligned, and fitted so that the ends of both rails are in
close contact. Using shims under any low sections, align all sections so that the joints between the
V-surfaces are as smooth as possible. After aligning and securing the track, the rail joints should be
smoothed over by draw filing.
When operating on a 10" I-beam section with cantilevered loads, the optional hold down bracket
assemblies are recommended. (See page 18).
If a “J” governor is to be used to control the CM-37B carriage, connect the carriage cable to the gov
-
ernor as shown in the Interconnection Diagram.
1.
2.
3.
4.
5.
CAUTION
20
SECTION 3 INSTALLATION
Figure 2 - Interconnection Diagram
BLU
BRN
21
SECTION 3 INSTALLATION
Figure 3 - Mounting Hole Layout, Optional Adaptor Plate - P/N 948296
4 - 5/8"
3 - 3/8"
4 - 5/8"
A
4 - 5/8"
.94
4 - 5/8"
3/4"
ALL HOLES MARKED
“A” ARE FOR MOUNTING
THE PLATE TO THE
CARRIAGE. (5/16 - 18)
ALL OTHER HOLES
ARE TAPPED
.375 - 16 UNC - 2B.
6 - 3/4"
4 - 5/8"
A
A
A
A
A
6 - 1/2"
1 - 9/32"
4 - 1/8"
9 - 3/4"
4 - 1/8"
22
SECTION 3 INSTALLATION
HOLES MARKED "A" ARE NO. 10-24 UNC-2B.
OTHER HOLES HAVE 5/16-18 HELICOIL INSERTS
PLAIN BOSSES ARE TO SUPPORT 'J' GOVERNOR AND ADAPTOR PLATE
Figure 4 - Carriage Top - Mounting Hole Pattern
10 - 24 UNC-2B
(2 HOLES)
5/16" - 18 UNC-2B
(6 HOLES)
12 - 1/2"
APPROX.
6 - 51/64"
25 - 1/2" APPROX.
4 - 1/8"
3/4"
9 - 3/4"
4 - 1/8"
6 - 1/2"
A
A
23
SECTION 4 OPERATION
4.0 Operation
Before setting the carriage in operation, brush the track or plate clean. Dirt or slag beneath the
wheels can cause irregularities in motion of the machine carriage. This in turn may result in flaws in
the work being performed.
Adjust clutch action if desired. Two types of clutch action are available in the carriage. Selection of
type is made by means of an adjustable setscrew in the top surface of the carriage (see Figure 2).
When the setscrew is in its normal position (as received from the factory), the clutch lever can snap
into either one of two positions: “engaged,” or “disengaged.” If the setscrew is screwed in to a lower
position, the clutch lever will snap into the “engaged” position only. The clutch can be disengaged,
but must be held in this position by hand; when the operator lets go of the clutch lever it will auto-
matically snap back into the “engaged” position. This latter characteristic is valuable in operations
where it is imperative that carriage and the mounted equipment begin operation simultaneously. It
eliminates the possibility that the operator might forget that he disengaged the clutch at the finish
of the previous pass.
The setscrew is accessible from outside the carriage (Figure 5), and is adjusted by means of a hex
key.
1.
2.
Clutch Adjustment
Figure 5 - CM-37B Clutch Adjustment
24
SECTION 4 OPERATION
Check carriage drag. The carriage also incorporates a friction drag. This drag is produced by a sprin-
gloaded pad which presses against the right-hand front wheel. It eliminates backlash and jerky car-
riage travel by providing a constant minimum load in both forward and reverse direction. The spring
tension of the friction pad is adjusted by means of a slotted screw in the side of the carriage frame,
behind the right-hand front wheel. Turn the screw counterclockwise to increase drag, clockwise to
decrease drag. An access hole is provided in this wheel to permit adjustment from outside the car-
riage, (see Figure 3). Rotate the wheel until the access-hole lines up with the head of the adjusting
screw. Then adjust the drag with a screwdriver. Adjust the drag so that the carriage moves slowly but
smoothly when pushed along the track by hand. When correctly adjusted, a pull of 5 to 7 pounds
should be required to move the carriage. The friction drag is very essential to smooth, clean welding,
particularly when the carriage is operated on irregular or inclined surfaces. It should be one of the
first items checked in attempting to correct faulty operation.
The height of the left rear wheel (as you face the front of the carriage) can be adjusted up or down
so that all four wheels are in equal contact with the plate or track. To adjust the wheel:
Turn the unit on its side or back.
Loosen the two setscrews on the bottom of the unit, next to the wheel (see Figure 3).
Place the unit on the plate or track, right side up.
Using a 7/8-in. wrench on the hexagonal hub of the wheel shaft, rotate the shaft until the wheel
is contacting the surface with approximately the same pressure as the other three wheels.
Turn the unit on its side and tighten the screws loosened in step b. (above). Be sure the shaft is
pushed all the way into the unit before tightening screws.
3.
4.
a.
b.
c.
d.
e.
25
SECTION 5 MAINTENANCE
5.0 Maintenance
5.1 General
Little maintenance is required to keep the CM-37B in top operating shape. The carriage motor-gear reduction unit,
drive gears, electrical and other components are well protected from dust and dirt by the bottom cover plate.
However, it is recommended that you lubricate the drive gears at least once a month. Disconnect power cord: set
the carriage on its side; and remove the bottom cover plate which is fastened by eight No. 8-32 x 1/4-in. screws.
Wipe off excess grease from the side of the gears and then repack with 1.6 lb. of Royco 37-R grease (77500250).
5.2 Checking or Replacement of Carriage Gearmotor Brushes
(Brush Kit P/N 2227020)
Brush life will vary greatly due to motor load conditions and the environment. The brush pigtail leads should be
checked for secure connection to the brush support stud. Brushes should be replaced when their pigtails touch
the top of the brush holder.
When replacing brushes, proper seating is important!
Wrap a strip of coarse grit (60 lb.) sandpaper, rough side out, around the commuter and under the
brush holder. (Do not use metal oxide based sandpaper or emery cloth that contains electrically
conductive materials).
Slide the new brush into the holder and snap the spring clip in place.
Rotate the armature slowly in the direction of normal motor rotation.
Remove the brush and inspect the face. The brush should be seated over 90% of the face area and
completely seated from leading to trailing edge.
Brushes should move freely in their holders. If brushes stick, it is usually due to built up dirt and oil. Brushes
should be inspected on occasion to see that they are long enough to press firmly against the commutator. Brush
springs should have equal tension. Only brushes of the same size, grade and shape as those originally supplied
should be used.
All motors have their brushes set on neutral before leaving the factory. After replacing the brush holder, realign
it to the factory neutral mark.
When replacing a turned-down commutator in the motor with a new commutator, the brush holder assembly
must be adjusted. Keep 1/16” clearance between the bottom of the brush holder and commuter. The brush holder
assembly is designed with a nut/bolt guide assembly for ease in positioning of the brush-box.
During periodic inspections, check that electrical connections are tight and properly insulated.
1.
2.
3.
4.
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SECTION 6 REPLACEMENT PARTS
6.1 General
Always provide the serial number of the unit on which the parts will be used. The serial number is stamped on
the unit nameplate.
To ensure proper operation, it is recommended that only genuine ESAB parts and products be used with this
equipment. The use of non-ESAB parts may void your warranty.
Replacement parts may be ordered from your ESAB Distributor.
Be sure to indicate any special shipping instructions when ordering replacement parts.
Refer to the Communications Guide located on the back page of this manual for a list of customer service phone
numbers.
6.2 Ordering
6.0 Replacement Parts
28
SECTION 6 REPLACEMENT PARTS
CONNECT 'J' GOVERNOR
LEADS HERE
CLUTCH LEVER -
38N19
ADJUSTABLE WHEEL - 37V02
See Section 4, Step 4
(2) SETSCREW -
61270556
Figure 6 - CM-37B Machine Carriage (Inside View)
GEAR MOTOR
- 2227017 (HI-SPEED)
- 2227016 LOW (SPEED)
29
COUPLING - 37N12
PIN - 62350053
(2) PIN - 62350004
(2) HANDLE - 38N19
WORM GEAR - 948369
(SEE NOTE)
SECTION “B - B”
SPACER - 17258
SCREW - 61392179
SETSCREW
1/4" - 20 x 3/8"
SECTION “C - C”
KEY - 81752405
WORM - 948370
(SEE NOTE)
BEARING - 84W10
(4) SCREW - 61340971
PIN - 62350053
COUPLING - 38N09
BLOCK - 37N39
PIN - 38N15
(2) WASHER
(2) RETAIN CLIP
CLEVIS PIN - 17260
LEVER ARM - 17259
“A”
(1) KEY - 37N73
STRAIN RELIEF - 993245
CONDUIT NUT - 63380175
“V” WHEEL - 37V03
(INCLUDES BEARING)
SPACER - 38N03
SETSCREW - 61270556
KEY - 37N56
BEARING - 91W53
SHAFT - 38N04
WHEEL - 37V02 (INCLUDES BEARING)
(2) SETSCREW
- 61270556
SPACER - 38N03
“B”
“C”
GEAR - 37N82
“B”
BEARING - 91W54
SHAFT - 38N02
PLATE - 38N05
WHEEL - 37N71
COLLAR - 38N07
SPRING - 38N06
COVER - 948368
GASKET - 999733
INSERT (HELI-COL)
91W80
SPRING - 80N09
(4) CLIP - 91W60
SCREW - 61330900
SCREW - 61335170
SPLINE NUT - 85W32
LEVER - 38N17
KEY - 81752204
DRAG BRAKE - 37V67
SCREW - 38N23
(2) SCREW - 1/4" - 28 x 1/2
(2) LOCKWASHER - 1/4"
“V” WHEEL - 37N70
SECTION “A - A”
CAP - 38N11
PALNUT - 91W58
SPACER - 38N10
SHAFT - 38N18
NOTE: WORM GEAR AND DRIVE WORM SHOULD
BE REPLACED AT THE SAME TIME
Figure 7 - CM-37B Machine Carriage - P/N 948371 and P/N 2227025
GEAR MOTOR - 2227017 (HI-SPEED)
2227016 (LOW SPEED)
“A”
“C”
SHAFT - 38N08
SHAFT - 38N01
BEARING - 91W53
KEY - 38N09
BRACKET - 2227018
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ESAB CM-37B Machine Carriage User manual
- Category
- Welding System
- Type
- User manual
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