MK Products CobraTurn T-260 User manual

Owner’s Manual
Product: CobraTurn T-260
Digital Turntable
Manual: 091-0751
Serial: 19100001
Voltage Rating: 120 VAC
Revision: -A-
Model Number: 127-008
®

Table of Contents
Safety Considerations ........................................................................i-iii
Specications .......................................................................... Section A
Unit Specications..............................................................................................1
Load Specications............................................................................................1
Dimensions ........................................................................................................2
Operation.................................................................................Section B
Initial Setup ........................................................................................................3
Operating Procedure..........................................................................................4
Weld Ground 5 AMP Fuse .................................................................................5
Circuit Breaker ...................................................................................................5
Calibration Procedure ........................................................................................5
Display Messages..............................................................................................6
Controls and Connections..................................................................................7
Accessories .............................................................................Section C
Kits .....................................................................................................................8
Trouble Shooting .....................................................................Section D
Trouble Shooting................................................................................................9
Appendicies.............................................................................Section E
Diagrams / Parts List........................................................................................10
Main Assembly............................................................................................... 11
Front Panel Assembly ....................................................................................13
Electrical.........................................................................................................14
Safety Warnings
Warranty

THIS PAGE INTENTIONALLY BLANK

CobraTurn® T-260 Digital Turntable Owner's Manual - Page i
SAFETY CONSIDERATIONS
ELECTRIC ARC WELDING EQUIPMENT
CAUTION : READ BEFORE ATTEMPTING INSTALLATION, OPERATION OR
MAINTENANCE OF THIS EQUIPMENT
1-1 INTRODUCTION
This equipment is intended for ultimate
application by commercial/industrial users
and for operation by persons trained and
experienced in the use and maintenance
of welding equipment. Operation should
not be undertaken without adequate train-
ing in the use of such equipment. Training
is available from many public and private
schools or similar facilities.
Safe practices in the installation, opera-
tion and maintenance of this equipment
requires proper training in the art, a care-
ful study of the information provided with
the equipment, and the use of common
sense. Rules for safe use are generally
provided by suppliers of welding power
sources, compressed gas suppliers, and
electrode suppliers. Careful compliance
with these rules will promote safe use of
this equipment.
The following Safety Rules cover some
of the more generally found situations.
READ THEM CAREFULLY. In case of
any doubt, obtain qualied help before
proceeding.
1-2 GENERAL PRECAUTIONS
A. Burn Prevention
ELECTRIC ARC WELDING PRODUCES
HIGH INTENSITY HEAT AND ULTRA-
VIOLET RADIANT ENERGY WHICH
MAY CAUSE SERIOUS AND PERMA-
NENT EYE DAMAGE AND WHICH MAY
DAMAGE ANY EXPOSED SKIN AREAS.
Wear helmet with safety goggles or
glasses with side shields underneath,
appropriate lter lenses or plates (pro-
tected by clear cover glass). This is a
must for welding or cutting (and chipping)
to protect the eyes from radiant energy
and ying metal. Replace cover glass
when broken, pitted, or spattered.
Medical first aid and eye treatment.
First aid facilities and a qualied rst aid
person should be available for each shift
unless medical facilities are close by for
immediate treatment of ash burns of the
eyes and skin burns.
Wear protective clothing - leather (or
asbestos) gauntlet gloves, hat, and high
safety-toe shoes. Button shirt collar and
pocket aps, and wear cu󰀪ess trousers
to avoid entry of sparks and slag.
Avoid oily or greasy clothing. A spark
may ignite them.
Flammable hair preparations should not
be used by persons intending to weld
or cut.
Hot metal such as electrode stubs and
work pieces should never be handled
without gloves.
Ear plugs should be worn when working on
overhead or in a conned space. A hard hat
should be worn when others work overhead.
B. Toxic Fume Prevention
WARNING: The use of this product may
result in exposure to chemicals known to
the State of California to cause cancer and
birth defects or other reproductive harm.
Adequate ventilation. Severe discomfort, ill-
ness or death can result from fumes, vapors,
heat, or oxygen enrichment or depletion that
welding (or cutting) may produce. Prevent
them with adequate ventilation. NEVER
ventilate with oxygen.
Lead-, cadmium-, zinc-, mercury-, beryllium-
bearing and similar materials, when welded
or cut, may produce harmful concentrations
of toxic fumes. Adequate local exhaust ven-
tilation must be used, or each person in the
area, as well as the operator, must wear an
air-supplied respirator. For beryllium, both
must be used.
Metals coated with or containing materials
that emit toxic fumes should not be heated
unless coating is removed form the work
surface, the area is well ventilated, or the
operator wears an air-supplied respirator.
Work in a conned space only while it is
being ventilated and, if necessary, while
wearing an air-supplied respirator.
Gas leaks in a conned space should be
avoided. Leaked gas in large quantities
can change oxygen concentration danger-
ously. Do not bring gas cylinders into a
conned space.
Leaving confined space, shut OFF gas
supply at source to prevent possible accu-
mulation of gases in the space if down-
stream valves have been accidentally
opened or left open. Check to be sure that
the space is safe before reentering it.
Vapors from chlorinated solvents can be
decomposed by the heat of the arc (or
ame) to form PHOSGENE, a highly toxic
gas, and other lung and eye irritating prod-
ucts. The ultraviolet (radiant) energy of the
arc can also decompose trichloroethylene
and perchloroethylene vapors to form phos-
gene. DO NOT WELD or cut where solvent
vapors can be drawn into the welding or cut-
ting atmosphere or where the radiant energy
can penetrate to atmospheres containing
even minute amounts of trichloroethylene
or perchloroethylene.
C. Fire and Explosion Prevention
Causes of re and explosion are: com-
bustibles reached by the arc, ame, ying
sparks, hot slag, or heated material, misuse
of compressed gases and cylinders, and
short circuits.
BE AWARE THAT ying sparks or fall-
ing slag can pass through cracks, along
pipes, through windows or doors, and
through wall or oor openings, out of
sight of the goggled operator. Sparks
can y many feet.
To prevent res and explosion:
Keep equipment clean and operable, free
of oil, grease, and (in electrical parts) of
metallic particles that can cause short
circuits.
If combustibles are in area, do NOT weld
or cut. Move the work if practicable, to
an area free of combustibles. Avoid paint
spray rooms, dip tanks, storage areas,
ventilators. If the work cannot be moved,
move combustibles at least 35 feet away,
out of reach of sparks and heat; or protect
against ignition with suitable and snug-
tting, re-resistant covers or shields.
Walls touching combustibles on oppo-
site sides should not be welded on (or
cut). Walls, ceilings, and oor near work
should be protected by heat-resistant
covers or shields.
Fire watcher must be standing by with
suitable fire extinguishing equipment
during and for some time after welding
or cutting if:
1. Appreciable combustibles (including
building construction) are within 35 feet.
2. Appreciable combustibles are further
than 35 feet, but can be ignited by sparks.
3. Openings (concealed or visible) in
oors or walls within 35 feet may expose
combustibles to sparks.
4. Combustibles adjacent to walls, ceil-
ings, roofs, or metal partitions can be
ignited by radiant or conducted heat.
Hot work permit should be obtained
before operation to ensure supervisor’s
approval that adequate precautions have
been taken.
After work is done, check that area is free
of sparks, glowing embers, and ames.
An empty container that held combus-
tibles, or that can produce ammable or
toxic vapors when heated, must never be
welded on or cut, unless container has
rst been cleaned in accordance with
industry standards.
This includes: a thorough steam or
caustic cleaning (or a solvent of water
washing, depending on the combustible’s
solubility), followed by purging and inert-
ing with nitrogen or carbon dioxide, and
using protective equipment.

CobraTurn® T-260 Digital Turntable Owner's Manual - Page ii
Water-lling just below working level may
substitute for inerting.
A container with unknown contents
should be cleaned (see paragraph
above). Do NOT depend on sense of
smell or sight to determine if it is safe to
weld or cut.
Hollow castings or containers must be
vented before welding or cutting. They
can explode.
Explosive atmospheres. NEVER weld
or cut where the air may contain am-
mable dust, gas, or liquid vapors (such
as gasoline).
D. Compressed Gas Equipment
The safe handling of compressed gas
equipment is detailed in numerous indus-
try publications. The following general
rules cover many of the most common
situations.
1. Pressure Regulators
Regulator relief valve is designed to
protect only the regulator from overpres-
sure; it is not intended to protect any
downstream equipment. Provide such
protection with one or more relief devices.
Never connect a regulator to a cylinder
containing gas other than that for which
the regulator was designed.
Remove faulty regulator from service
immediately for repair (rst close cylinder
valve). The following symptoms indicate
a faulty regulator:
Leaks - if gas leaks externally.
Excessive Creep - if delivery pressure
continues to rise with downstream valve
closed.
Faulty Gauge - if gauge pointer does not
move o󰀨 stop pin when pressurized, nor
returns to stop pin after pressure release.
Repair. Do NOT attempt repair. Send
faulty regulators for repair to manufac-
turer’s designated repair center, where
special techniques and tools are used
by trained personnel.
2. Cylinders
Cylinders must be handled carefully to
prevent leaks and damage to their walls,
valves, or safety devices:
Avoid electrical circuit contact with cylin-
ders including third rails, electrical wires,
or welding circuits. They can produced
short circuit arcs that may lead to a seri-
ous accident. (See 1-3C)
ICC or DOT marking must be on each
cylinder. It is an assurance of safety
when the cylinder is properly handled.
Identifying gas content. Use only cylin-
ders with name of gas marked on them;
do not rely on color to identify gas con-
tent. Notify supplier if unmarked. NEVER
DEFACE or alter name, number, or other
markings on a cylinder. It is illegal and
hazardous.
Empties: Keep valves closed, replace
caps securely; mark MT; keep them sepa-
rate from FULLS, and return promptly.
Prohibited use. Never use a cylinder or its
contents for other than its intended use,
NEVER as a support or roller.
Locate or secure cylinders so they cannot
be knocked over.
Passageways and work areas. Keep cyl-
inders clear of areas where they may be
stuck.
Transporting cylinders. With a crane, use
a secure support such as a platform or
cradle. Do NOT lift cylinders o󰀨 the ground
by their valves or caps, or by chains, slings,
or magnets.
Do NOT expose cylinders to excessive heat,
sparks, slag, and ame, etc. that may cause
rupture. Do not allow contents to exceed
55 degrees C (130 degrees F.) Cool with
water spray where such exposure exists.
Protect cylinders, particularly valves from
bumps, falls, falling objects, and weather.
Replace caps securely when moving cyl-
inders.
Stuck valve. Do NOT use a hammer or
wrench to open a cylinder valve that cannot
be opened by hand. Notify your supplier.
Mixing gases. NEVER try to mix any gases
in a cylinder.
NEVER rell any cylinder.
Cylinder ttings should never be modied
or exchanged.
3. Hose
Prohibited use. Never use hose other
than that designed for the specied gas. A
general hose identication rule is: red for
fuel gas, green for oxygen, and black for
inert gases.
Use ferrules or clamps designed for the
hose (not ordinary wire or other substitute)
as a binding to connect hoses to ttings.
No copper tubing splices. Use only stan-
dard brass ttings to splice hose.
Avoid long runs to prevent kinks and abuse.
Suspend hose o󰀨 ground to keep it from
being run over, stepped on, or otherwise
damaged.
Coil excess hose to prevent kinks and
tangles.
Protect hose from damage by sharp edges,
and by sparks, slag, and open ame.
Examine hose regularly for leaks, wear, and
loose connections. Immerse pressured
hose in water; bubbles indicate leaks
Repair leaky or worn hose by cutting area
out and splicing. Do NOT use tape.
4. Proper Connections
Clean cylinder valve outlet of impurities that
may clog orices and damage seats before
connecting regulator. Except for hydrogen,
crack valve momentarily, pointing outlet
away from people and sources of ignition.
Wipe with a clean, lintless cloth.
Match regulator to cylinder. Before con-
necting, check that the regulator label
and cylinder marking agree, and that the
regulator inlet and cylinder outlet match.
NEVER Connect a regulator designed for a
particular gas or gases to a cylinder contain-
ing any other gas.
Tighten connections. When assembling
threaded connections, clean and smooth
seats where necessary. Tighten. If con-
nection leaks, disassemble, clean, and
retighten, using properly tting wrench.
Adapters. Use a CGA adapter (available
from your supplier) between cylinder
and regulator, if one is required. Use
two wrenches to tighten adapter marked
RIGHT and LEFT HAND threads.
Regulator outlet (or hose) connections
may be identied by right hand threads
for oxygen and left hand threads (with
grooved hex on nut or shank) for fuel gas.
5. Pressurizing Steps:
Drain regulator of residual gas through
suitable vent before opening cylinder
(or manifold valve) by turning adjusting
screw in (clockwise). Draining prevents
excessive compression heat at high
pressure seat by allowing seat to open
on pressurization. Leave adjusting
screw engaged slightly on single-stage
regulators.
Stand to side of regulator while opening
cylinder valve.
Open cylinder valve slowly so that regu-
lator pressure increases slowly. When
gauge is pressurized (gauge reaches
regulator maximum) leave cylinder valve
in following position: for oxygen and inert
gases, open fully to seal stem against
possible leak; for fuel gas, open to less
than one turn to permit quick emergency
shut-o󰀨.
Use pressure charts (available from your
supplier) for safe and e󰀩cient recom-
mended pressure settings on regulators.
Check for leaks on rst pressurization
and regularly thereafter. Brush with soap
solution. Bubbles indicate leaks. Clean
o󰀨 soapy water after test; dried soap is
combustible.
E. User Responsibilities
Follow all Safety Rules.
Remove leaky or defective equipment
from service immediately for repair. Read
and follow user manual instructions.
F. Leaving Equipment Unattended
Close gas supply at source and drain gas.
G. Rope Staging-Support
Rope staging-support should not be
used for welding or cutting operation;
rope may burn.
1-3 ARC WELDING
Comply with precautions in 1-1, 1-2, and
this section. Arc Welding, properly done,
is a safe process, but a careless operator
invites trouble. The equipment carries
high currents at significant voltages.
The arc is very bright and hot. Sparks
y, fumes rise, ultraviolet and infrared
energy radiates, weldments are hot,
and compressed gases may be used.
The wise operator avoids unnecessary
risks and protects himself and others
from accidents.

CobraTurn® T-260 Digital Turntable Owner's Manual - Page iii
A. Burn Protection
Comply with precautions in 1-2.
The welding arc is intense and visibly
bright. Its radiation can damage eyes,
penetrate lightweight clothing, reflect
from light-colored surfaces, and burn
the skin and eyes. Skin burns resemble
acute sunburn; those from gas-shielded
arcs are more severe and painful. DON’T
GET BURNED; COMPLY WITH PRE-
CAUTIONS.
1. Protective Clothing
Wear long-sleeve clothing in addition to
gloves, hat, and shoes. As necessary,
use additional protective clothing such
as leather jacket or sleeves, ameproof
apron, and re-resistant leggings. Avoid
outer garments of untreated cotton.
Bare skin protection. Wear dark, sub-
stantial clothing. Button collar to protect
chest and neck, and button pockets to
prevent entry of sparks.
2. Eye and Head Protection
Protect eyes from exposure to arc. Eyes
may be damaged by radiant energy
when exposed to the electric arc, even
when not looking in the direction of the
arc. Never look at an electric arc without
protection.
Welding helmet or shield containing a
lter plate shade no. 12 or denser must
be used when welding. Place over face
before striking arc.
Protect lter plate with a clear cover plate.
Cracked or broken helmet or shield
should NOT be worn; radiation can be
passed through to cause burns.
Cracked, broken, or loose lter plates
must be replaced IMMEDIATELY.
Replace clear cover plate when broken,
pitted, or spattered.
Flash goggles with side shields MUST be
worn under the helmet to give some pro-
tection to the eyes should the helmet not
be lowered over the face before an arc
is struck. Looking at an arc momentarily
with unprotected eyes (particularly a high
intensity gas-shielded arc) can cause a
retinal burn that may leave a permanent
dark area in the eld of vision.
3. Protection of Nearby Personnel
Enclose the welding area. For production
welding, a separate room or enclosed
bay is best. In open areas, surround the
operation with low-reective, noncom-
bustible screens or panels. Allow for free
air circulation, particularly at oor level.
Viewing the weld. Provide face shields
for all persons who will be looking directly
at the weld.
Others working in area. See that all per-
sons are wearing ash goggles.
Before starting to weld, make sure that
screen aps or bay doors are closed.
B. Toxic Fume Prevention
Comply with precautions in 1-2B.
Generator engine exhaust must be
vented to the outside air. Carbon mon-
oxide can kill.
C. Fire and Explosion Prevention
Comply with precautions in 1-2C.
Equipment’s rated capacity. Do not over-
load arc welding equipment. It may over-
heat cables and cause a re.
Loose cable connections may overheat or
ash and cause are.
Never strike an arc on a cylinder or other
pressure vessel. It creates a brittle area
that can cause a violent rupture or lead to
such a rupture later under rough handling.
D. Compressed Gas Equipment
Comply with precautions in 1-2D.
E. Shock Prevention
Exposed electrically hot conductors or
other bare metal in the welding circuit, or in
ungrounded, electrically-HOT
equipment can fatally shock a person whose
body becomes a conductor. DO NOT
STAND, SIT, LIE, LEAN ON, OR TOUCH a
wet surface when welding without suitable
protection.
To protect against shock:
Keep body and clothing dry. Never work
in damp area without adequate insulation
against electrical shock. Stay on a dry
duckboard, or rubber mat when dampness
or sweat cannot be avoided. Sweat, sea
water, or moisture between body and an
electrically HOT part - or grounded metal
- reduces the body surface electrical resis-
tance, enabling dangerous and possibly
lethal currents to ow through the body.
1. Grounding the Equipment
When installing, connect the frames of
each unit such as welding power source,
control, work table, and water circulator to
the building ground. Conductors must be
adequate to carry ground currents safely.
Equipment made electrically HOT by stray
currents may shock, possibly fatally. Do
NOT GROUND to electrical conduit, or to a
pipe carrying ANY gas or a ammable liquid
such as oil or fuel.
Three-phase connection. Check phase
requirement of equipment before install-
ing. If only three-phase power is available,
connect single-phase equipment to only two
wires of the three-phase line. Do NOT con-
nect the equipment ground lead to the third
(live) wire, or the equipment will become
electrically HOT - a dangerous condition
that can shock, possibly fatally.
Before welding, check ground for continuity.
Be sure conductors are touching bare metal
of equipment frames at connections.
If a line cord with a ground lead is provided
with the equipment for connection to a
switch box, connect the ground lead to
the grounded switch box. If a three-prong
plug is added for connection to a grounded
mating receptacle, the ground lead must be
connected to the ground prong only. If the
line cord comes with a three-prong plug,
connect to a grounded mating receptacle.
Never remove the ground prong from a plug,
or use a plug with a broken ground prong.
2. Connectors
Fully insulated lock-type connectors
should be used to join welding cable
lengths.
3. Cables
Frequently inspect cables for wear,
cracks, and damage. IMMEDIATELY
REPLACE those with excessively worn
or damaged insulation to avoid possibly
lethal shock from bared cable. Cables
with damaged areas may be taped to give
resistance equivalent to original cable.
Keep cable dry, free of oil and grease,
and protected from hot metal and sparks.
4. Terminals and Other Exposed Parts
Terminals and other exposed parts of
electrical units should have insulating
covers secured before operation.
5. Electrode Wire
Electrode wire becomes electrically HOT
when the power switch of gas metal-arc
welding equipment is ON and welding
gun trigger is pressed. Keep hands and
body clear of wire and other HOT parts.
6. Safety Devices
Safety devices such as interlocks and
circuit breakers should not be discon-
nected or shunted out.
Before installation, inspection, or service
of equipment, shut OFF all power, and
remove line fuses (or lock or red-tag
switches) to prevent accidental turning
ON of power. Disconnect all cables from
welding power source, and pull all 115
volts line-cord plugs.
Do not open power circuit or change
polarity while welding. If, in an emer-
gency, it must be disconnected, guard
against shock burns or ash from switch
arcing.
Leaving equipment unattended. Always
shut OFF, and disconnect all power to
equipment.
Power disconnect switch must be avail-
able near the welding power source.

Thank you!
For selecting a quality product. We want you to take pride
in operating this product...as much pride as we have in
bringing you quality products Since 1966
MK Products Inc. | 16882 Armstrong Ave. Irvine CA, 92606 | www.mkproducts.com | 949-863-1234 | [e-mail]
BEFORE USING THIS EQUIPMENT, PLEASE READ THE IMPORTANT
SAFETY CONSIDERATIONS PROVIDED FOR YOUR PROTECTION
In eorts of going green, a printed manual is not included with your purchase. To view the PDF
version of the Owner’s Manual, please visit our website at www.mkproducts.com and click on the
support tab. We recommend you read the Owner’s Manual completely before attempting to use this
equipment.
If you prefer a printed copy of the Owner’s Manual, the PDF version found on our website is in a
printable format. A printed copy of the manual can also be requested from the factory free of charge.
To request a copy, contact our Sales and Technical Department via email at [email protected] or
call 949-863-1234 or 1-800-787-9707 M-F 6am to 5pm PST.
Please examine carton and equipment for damage immediately
All merchandise is sold FOB MK Products® Inc., Irvine, California. Title to the merchandise transfers
to the receiving party at the time carrier accepts shipment. In the event of loss or damage, it is the
receiving party’s responsibility to file a claim.
For assistance in reporting and filing a claim, contact MK Products Customer Service
Department within 15 calendar days from date of shipment.
Please record your equipment information below. This information can be found on your machine
nameplate. Whenever you request replacement parts for, or information on this equipment always
supply the information you have recorded below.
Model Number
Serial Number
P/N 091-0746 REV/A

CobraTurn® T-260 Digital Turntable Owner's Manual - Page 1
Section A Specications
Load Specications
Turntable Vertical
• 130 lbs in the vertical position from 0.1-6 RPM with a balanced &
centered load, 7” max from table surface
Unit Specications
Model Turntable
Diameter
Degrees
Tilt
Speed Range R.P.M. Ground
Capacity
AMPS
Input
Voltage Weight Transmission
Low High
127-008 10" 0° to 90° 0.1 6
400A
60%
Duty
Cycle
120VAC
50/60 Hz 38 lbs Gear w/ De-clutch
Turntable Horizontal
• 260 lbs in the horizontal position from 0.1-6 RPM with a balanced &
centered load
7"
7"

CobraTurn® T-260 Digital Turntable Owner's Manual - Page 2
4X 3.25
4X 0.44
2.94
90°
5.75
0.25
10.00
D
C
A
B
C
D
1 2 3
4 5
6
7
8
8
7
6
5
4
3
2
1
E
F
E
Dimensions
10.0
10.8
9.6
17.0
3.9
12.4
19.2
7.8
CENTER HEIGHT
IN VERTICAL
POSITION
10.0
10.8
9.6
17.0
19.2
7.8
5.75
10.00
0.25
2.94
12.4
3.9
4X 0.44
4X 3.25
90°

CobraTurn® T-260 Digital Turntable Owner's Manual - Page 3
Section B Operation
Initial Setup
1. Unbox unit from packaging. Save packaging for future
transportation of unit.
2. Plug the unit's power cord into a standard 3 prong 120VAC outlet.
3. If you desire to use the provided foot pedal, plug the pedal cable into
connector on the side of the unit.
4. Attach a ground cable with a 1/2" ring lug to the ground terminal on
the unit.
Warning: Failure to attach a weld ground cable directly to the unit
while welding on the turntable, may cause damage to the unit.
Reversely, leaving the ground cable attached to the unit while weld-
ing a part not on the turntable, may cause damage to the unit.

CobraTurn® T-260 Digital Turntable Owner's Manual - Page 4
Operating Procedure
1. Push On / O󰀨 button to switch the unit on.
NOTE: If unit doesn't turn on, check power connection and
the fuse.
2. The display will briey show the rmware version and then show the last
rotational speed used. If you see any other message, please refer to list
of display messages (page 5) and/or see the trouble shooting section
(page 8).
3. To adjust display brightness press and hold the rotation direction button
(the turntable must be stopped). After ~1 sec., the display changes and
shows the brightness value (1 to 63), rotate knob to adjust brightness of
the display. Release the rotation direction button when done.
4. Push the rotation direction button to switch between clockwise and
counter clockwise rotation. When the button is lit the table will rotate
clockwise. When it is not lit the rotation is counter clockwise.
5. Establish desired speed setting using the knob while reading the LED
display on the turntable.
6. To start turntable with the set speed press the push button in the center
of the knob and release within 1 sec., the motor will start and the button
lights green. Press the button again to stop and the button ashes red
then turns blue. If the button is held longer than 1 sec., the turntable
starts jogging (6 RPM), button ashes green and turntable jogs until
released.
NOTE: When knob is pressed, the knob rotation is ignored to prevent
value changes while pressing.
With the foot pedal plugged in, the speed setting displayed is the
maximum speed the foot pedal will use. While pressing the foot pedal,
the display shows speed of the foot pedal setting.
NOTE: When the foot pedal is plugged in, the Start/Stop function of the
knob is disabled.
7. Press and hold the On / O󰀨 button (display shows “OFF”) until power
is turned to standby mode. If released sooner, the display returns to
normal.
NOTE: The unit is not completely o unless it is unplugged from
power source.
8. To adjust the angle of the table press and hold in the push knob on the
right side of the machine. Lift table to desired degree then release the
push knob, thus locking the table in position.
NOTE:
All turntable settings and calibration are preserved when power
is turned o.
ON/OFF
Button
Rotation
Direction
Button
Knob / Push
Button (Start,
Stop, Jog)

CobraTurn® T-260 Digital Turntable Owner's Manual - Page 5
Calibration Procedure
Your CobraTurn® T-260 comes calibrated from the factory, but if you
suspect the unit's RPM readings are o󰀨, follow the procedure below to
re-calibrate the unit:
1. Make sure the unit is o󰀨.
2. Press and hold down the direction button, then press the power
button.
3. Next release the power button and then the direction button.
4. If done correctly, "CAL" will be displayed as shown.
5. Begin the calibration by pressing the start button (knob / push button).
Calibration will take about 20 minutes as the table turns and records
RPM and time data.
6. After the data is recorded, the letters "SLo" will be ashing on the
display, slowly turn the speed knob until the turntable barely begins to
rotate.
7. Finally press the stop button (knob / push button) to nish and save the
calibration.
Weld Ground 5 AMP Fuse
Your CobraTurn® T-260 is outtted with a 5 AMP fuse to protect the
internal electronics in the event of improper grounding. Replace with
5AMP 250vac 3AG fuse.
Circuit Breaker
May be tripped in the event of an input power surge or if excess
voltage is applied. Breaker switch must be reset.

CobraTurn® T-260 Digital Turntable Owner's Manual - Page 6
Display Messages
• 50H: 50Hz input frequency detected
• 60H: 60Hz input frequency detected
• bAd: This message is displayed for about 3 seconds and default
settings are restored and self-testing continues. WARNING: The turntable
SHOULD be recalibrated.
• CAL: If the display shows "CAL", the hardware calibration needs to be
performed (never calibrated or corrupted).
• Err: Pressing invalid key causes this message to display for ~2 sec.
•Gnd: Ground fault, either missing earth ground or need to replace fuse
• nEE: This means the turntable memory was not set or lost. Power cord
needs to be unplugged to reset. If this error persists, please contact MK
support.
• OFF: shutting o󰀨 power in progress
•PdL: Pressing invalid key while foot pedal is plugged in and key is
ignored.
• SLo: This ashing message is displayed during calibration after the data
is recorded.

CobraTurn® T-260 Digital Turntable Owner's Manual - Page 7
On/Off
(PWR) Push
Button
Speed Control/LED Brightness
Adjustment Knob
Start/Stop/Jog Push Button
CC / CCW Rotation
Direction Button
Controls and Connections
De-clutch
Handle
Foot Pedal
Connector
(accessory)
110V Input Power
5 AMP Circuit Breaker
Digital RPM LED
Display
Weld Ground 5 AMP Fuse Gas Purge Inlet Connector
Weld Ground Tilt Release
Push Knob
Gas Purge Outlet

CobraTurn® T-260 Digital Turntable Owner's Manual - Page 8
005-0746 (optional)
Heavy Duty
Variable Speed Foot Control
005-0747 (standard)
On/Off Foot Switch
005-0812 (optional)
Self-Centering 3 Jaw Chuck
005-0677 (standard)
10" Turntable, With Hardware
Section C Accessories
Kits
3 Jaw Chuck Clamping Range:
Chuck
Diameter
Internal Jaws
Clamping Range
A-A1
3.94 in 0.078 - 1.181 in 1.181 - 3.543 in 1.181 - 3.149 in
B-B1 C-C1
Clamping Range
Jamming Range
External Jaws

CobraTurn® T-260 Digital Turntable Owner's Manual - Page 9
Section D Troubleshooting
* For list of display messages and their meanings see page 5
Symptom
Cause
Remedy
Unit does not turn on and does
not display
Input power surge Reset circuit breaker
Displays GND and knob flashes
red
Input power source is not
properly grounded
Move to properly grounded
outlet
Weld ground 5 amp fuse blown
Replace with 5AMP 250vac 3AG
fuse
Will not calibrate, SLo does not
display and turntable continues
to rotate
Sensor not detecting magnet
Adjust sensing magnet located
under the main axle
Replace sensor
Symptom Cause Remedy

CobraTurn® T-260 Digital Turntable Owner's Manual - Page 10
Section E Appendices
Diagrams / Parts List
Main Assembly.......................................................................... 11
Front Panel Assembly............................................................... 13
Electrical ................................................................................... 14

CobraTurn® T-260 Digital Turntable Owner's Manual - Page 11
CobraTurn® T-260 Main Assembly

CobraTurn® T-260 Digital Turntable Owner's Manual - Page 12

CobraTurn® T-260 Digital Turntable Owner's Manual - Page 13
CobraTurn® T-260 Front Panel Assembly
003-2697
2
6
5
3X
7
3X
4
9
10
8
3
1
NOTES: UNLESS OTHERWISE SPECIFIED
REVISIONS
REV. DESCRIPTION/DCN NUMBER DATE APPROVED
A PRN 4322 08/19
NO. QTY. PART NO. DESCRIPTION
PARTS LIST
10 1 435-1367 FRONT PANEL T-260
9 1 431-2055 WASHER DELRIN TURNTABLE
8 1 405-1595 DECAL FRONT T-260
7 3 336-0108 SCR PN P 4-40X3/8 SS
6 1 336-0105 SCR PN P 4-40X3/16 SS
5 3 333-0041 WSHR LK #4 INTL STAR STL
4 1 313-0136 RET. RING EXT. 13/16" ID
3 1 303-0110 0-RING BUNA 019 A50
2 1 003-2700 ASSY PCB FR PNL CNTLR TURNTABLE
1 1 003-2504 ASSY KNOB TURNTABLE
D
C
B
A
A
B
C
D
1
2
3
4 5
6
7
8
8
7
6
5
4
3
2
1
E
F
E
F
THIS DOCUMENT IS THE PROPERTY OF MK PRODUCTS, INC. IT MAY NOT BE COPIED, REPRINTED OR
DISCLOSE TO A THIRD PARTY, EITHER WHOLLY OR IN PART, OR AS A BASIC FOR MANUFACTURE
WITHOUT THE PRIOR WRITTEN CONSENT OF MK PRODUCTS, INC.
KEVIN BARRIOS
KEVIN BARRIOS
003-2697
SHEET 1 OF 1
UNLESS OTHERWISE SPECIFIED:
SCALE: 1:1
REV DWG. NO.
D
SIZE
TITLE:
APPROVED
DRAWN
SEE PARTS LIST
FINISH:
MATERIAL:
DIMENSIONS ARE IN INCHES
TOLERANCES ARE:
DECIMALS ANGLES
.X
.03
.XX
.01 1/2
.XXX
.005
A
ENGINEER
HEAT TREATMENT:
SURFACE ROUGHNESS:
DO NOT SCALE DRAWING
M.K. PRODUCTS, INC.
IRVINE, CALIFORNIA
8/20/2019
8/20/2019
8/29/2019
8/29/2019
ASSY FRONT PANEL T-260
N/A
N/A
DATE
DATE
DATE
DATE
CHECKED
N/A
CHRIS WESTLAKE
TRUNG NGUYEN
FRONT PANEL PARTS LIST
NO. QTY. PART NO. DESCRIPTION
1
1
003-2504 ASSY KNOB TURNTABLE
2
1
005-0820 ASSY PCB FR PNL CNTLR TURNTABLE
3
1
303-0110 0-RING BUNA 019 A50
4
1
313-0136 RET. RING EXT. 13/16" ID
5
3
INCLUDED WSHR LK #4 INTL STAR STL
6
1
IN KIT SCR PN P 4-40X3/16 SS
7
3
005-0819 SCR PN P 4-40X3/8 SS
8
1
405-1595 DECAL FRONT T-260
9
1
431-2055 WASHER DELRIN TURNTABLE
10
1
435-1367 FRONT PANEL T-260
Sheet3Sheet2Sheet1