Gamma+ 6500 Els User manual

OWNER'S MANUAL
Issue 1 - July 2006
STRINGINGMACHINE
6500 Els
2 POINT MOUNTING

1
LIMITED WARRANTY
GAMMASPORTS("GAMMA")warrantstotheoriginalpurchaserthattheGAMMAstringingmachine("EQUIPMENT")purchased
isfreefromdefectsinmaterialsandworkmanshipforaperiodoffive(5)yearsfromthedateoforiginalpurchaseformechanicalparts
(excludingelectronicpartsandstringclamps),andforaperiodofone(1)yearfromthedateofpurchaseforelectronicpartsandstring
clamps.Shouldanydefectsdevelopundernormalusewithinthespecifiedtimeperiods,GAMMAwillatitsoption,repairorreplace
thedefectiveEQUIPMENTprovideditisreturnedtoGAMMAprepaidatthepurchaser'sexpense.Thiswarrantydoesnotapplyto
anydamageordefectcausedbynegligence,abuse,misuse,unauthorizedalteration,shipping,handling,orpartwearandtearasa
resultofnormaluse.
Routinemaintenance,adjustment,andcleaningrequiredtoensureproperoperationaretheresponsibilityofthepurchaserandare
notcoveredunderthetermsofthiswarranty. Theseinclude,butarenotlimitedto: StringClampadjustment,asdescribedonpage
12, cleaningofStringClamps,asdescribedonpage18,andcleaningofStringGripper,asdescribedonpage18.
GAMMA'sobligationunderthiswarrantyislimitedtorepairorreplacementofdefectiveEQUIPMENT,andnooneisauthorizedto
promiseanyotherliability.GAMMAshallinnoeventbeliableforanyincidentalorconsequentialdamages.
ToreturndefectiveEQUIPMENT,areturnauthorization(RA#)mustbeobtainedfromaGAMMAcustomerservicerepresentative
bycalling1-800-333-0337.TheRA#mustbemarkedontheoutsideoftheshippingcartonbeingreturned.Allreturnsmustbeshipped
prepaidbythecustomertoGAMMA.Pleaseretaintheoriginalshippingcartonandpackingmaterialsforanyfutureshipments.
6500 Els
OWNER’SMANUAL
TABLEOFCONTENTS
PAGE1 ................................................................................................ WARRANTY
PAGE2 ...................................................................................................FEATURES
PAGE3 .....................................................................UNPACKINGANDCONTENTS
PAGE4 ....................................................................... ASSEMBLYINSTRUCTIONS
PAGE9 ......................................................... POWERCONNECTIONS&CONTROL
PAGE10 ......................................CONTROLPANELFUNCTIONSANDFEATURES
PAGE11 ...................................................... STRINGLENGTHMETEROPERATION
PAGE12 ........................................................ QUICKACTIONCLAMPOPERATION
PAGE13 ............................................STRINGGRIPPER/TENSIONEROPERATION
PAGE14 ............................................................................ MOUNTINGTHEFRAME
PAGE15 ............................................................................STRINGINGTHEFRAME
PAGE16 ................................................................PATHFINDERAWLOPERATION
PAGE17 ....................................................................... TENSIONERCALIBRATION
PAGE18 .............................................................................. CLEANINGANDCARE
PAGE19 ....................................................................... TROUBLESHOOTINGTIPS
PAGE20 ................................................................. PARTNUMBERSANDLISTING

2
6500 Els
KEYPRODUCTFEATURES
1. Electric Constant Pull String Tensioner w/ Diamond Coated String Gripper
(10-90 lbs tension range in 0.5 lbs increments)
2. Control Panel w/ Calibration, Lbs/Kgs, Pulling Speed & String Length Functions
3. String Reel Holder
4. Electronic String Length Meter
5. 2-Point Self-Centering Mounting System (4 point support)
6. Quick Action Swivel, String Clamps w/ Diamond Coating
7. Convenient Foot Actuated Tensioner Switch
8. Fiberglass Cover w/ Integrated Tool Trays (70 sq. in. of storage area)
9. Height Adjustable from 39” to 46” (can also be used on table top)
10. 110 V / 220 V Compatibility
9
5
10
8
7
4
2
1
6
3

3
6500 Els
UNPACKINGINSTRUCTIONS& CONTENTS
InstructionsforUnpacking and Preparing forAssembly
The 6500 Els is shipped in three cartons, a large carton for the stringing machine and
accessories, a medium carton with the turntable and mounting system and a smaller
carton for the post and base legs. Please save the cartons and packing materials
for possible shipments in the future. Gamma Sports cannot be responsible for
machines that are not returned, in their original, undamaged packaging. The tools you will
need to assemble the 6500 Els are provided with the machine. Due to the weight of the
tensioner unit, you may need the assistance of someone to help lift the tensioner unit out
of the carton.
Once the cartons are opened, remove all inner cartons and check to be sure that all parts
are present and accounted for.
Contents of Base & Leg Carton
(1) Lower Post
(1) Upper Post with Flange Plate
(4) Legs
(1) Locking Knob Screw
(4) M8 x 25 Flat Head Screws
(4) M8 x 30 Cap Screws
(1) String Reel Holder (M8 Threaded Pin), (1) Knob, (10) Spacers, & (2) M8 Washers
(1) Box Wrenches – 6 & 12 mm
Contents of Turntable & Mounting System Carton
(1) Turntable
(2) Mounting Stands w/ Frame Hold Downs
(2) String Clamp Heads
Contents of Large Master Carton (including accessory cartons packed inside)
(1) Stringer Assembly Unit w/ Tensioner Module
(1) Power Cord w/ Ground Pin
(4) Rubber Feet w/ Screws
(1) Foot Pedal Tensioner Switch
(1) Face Plate for String Length Meter & (2) Spare String Length Meter Clamp Pads
(1) Tool Kit (contains side cutter, bent nose pliers, needle nose pliers)
(1) Straight Stringers Awl & (1) Pathfinder Specialty Awl
(1) Starting Clamp
(2)Composite Badminton FloatingClamps
(1) 9 pc L-Hex Wrench Set
(1) 17mm socket
(1) Gripper/Clamp Cleaning Stone

4
Base Leg Assembly
The stringing machine uses a four leg base
design. The legs must be assembled to the
support post before use. Remove the lower
column support, the upper column support,
four(4)legs,four(4)socketheadcapscrews
and four (4) flat head cap screws from the
small shipping carton.
BaseLeg Assembly (Cont.)
Align the holes in the leg flange with the
matching holes in the lower column support
post. Secure the leg with one FLAT HEAD
cap screw through the upper hole, and one
SOCKET HEAD cap screw through the bot-
tomhole.Repeatthisprocedureforthethree
remaining legs.
ASSEMBLYINSTRUCTIONS
BaseLeg Assembly (Cont.)
To complete the base stand, screw the height adjust-
ment locking knob (“A”) into the side of the support
column. The locking knob should not protrude beyond
the inside of the support column at this time.
“A”

5
StandUpperPost Installation
Removethefour(4)buttonhead cap screws
from the base of the assembly.
ASSEMBLYINSTRUCTIONS
StandUpper Post Installation(cont.)
Withtheheightadjustment capscrewonthe
upperpostfacingtheleftsideofthetensioner,
align the four (4) holes in the upper post
flange with the holes in the tensioner base.
Secure the flange to the base with the four
cap screws.
HeightAdjustment
Theheightofthe machineisadjustablefrom
39”to46”.Tochangetheheight,removethe
socket head cap screw from its current posi-
tionandplaceitintheappropriateholetoset
the desired height of the machine.

6
ClampHeadInstallation
The post of the string clamp head and the tube of the string
clamp base are treated with grease to provide protection
against corrosion during shipping. Remove any excessive
grease with a clean cloth prior to use. The post and tube may
also be cleaned with isopropyl alcohol. After this type of
thorough cleaning, the post and tube should be treated with a
light coating of machine oil to protect the surfaces against
corrosion and to ensure smooth operation.
InstallingtheTurntable
Remove the nuts from underneath of the
turntable and leave the screws in position.
Align the four (4) holes in the center of the
turntable with the four (4) holes on the
turntablepin. Tightenthemsecurelywiththe
6mm allen wrench.
ASSEMBLYINSTRUCTIONS

STRINGREELHOLDERINSTALLATION
Thestringreel holderpinisan8mmrodwith
threads on both ends, and flat surfaces
machinedonone end. Thread the endof the
pinwithouttheflatsurfacesintothethreaded
boss on the right side of the lower column
support. Using the M6 open end wrench
positioned on the flat surfaces, securely
tighten the pin to the lower column support.
The string reel holder can hold up to 5 reels
of string (depending on the size of the string
reel). Before placing the first reel on the pin,
slide two M8 washers over the pin and slide
them to the boss on the lower column sup-
port.Afterthefirstreel is placedontothepin,
place two spacers between each reel to
provide enough space between reels and
allow them to turn freely without rubbing
against one another. (To provide a smooth
feed to the String Length Meter, place the
reels on the pin so the string spools off the
reel from the underside of the reel.)
After the last reel is installed, place the
remaining spacer(s) on the pin and attach
the threaded knob to the end of the pin.
7

SLMFACEPLATE INSTALLATION
Remove the tape covering the opening on
the front side of the bottom cover to expose
the string length meter.
Position the face plate assembly over the
opening in the bottom cover, and align the
two countersunk end holes of the face plate
with the threaded attachment holes in the
front of the string length meter. With the two
flat head machine screws, secure the face
plate assembly to the string length meter.
To check for proper alignment, lift the top
clamp of the face plate assembly and insert
a section of racquet string at least 12 inches
long into the entrance hole of the face plate.
Continue feeding the string section into the
string length meter, until it appears through
the exit hole. If the entrance or exit holes
appeartobeblocked,loosentheattachment
screws and adjust the position of the face
plate assembly until the section of string
exits the face plate. After the face plate is
properlyaligned,tightentheflatheadscrews.
8

Instructions for Power Connection (Refer to Figure 1)
CAUTION ! Before connecting to the power supply, check the voltage supply switch
setting located on the side panel as shown in Figure 1. To change from 115 volts service
to 230 volt service simply slide the switch fully to the top or to the bottom until “115V” or
“230V” appears on the switch plate.
The acceptable range of input voltages for the “115 V” setting is between 110 V and 120
V @ 60 Hz and for the “230 V” setting, between 220 V and 240 V @ 50 to 60 Hz. If you
have any question regarding the input voltage supply for your area, please ask your
electric utility company.
To install the power cord, insert the female end of the power cord into the Power Cord
Socket located on the side panel and plug the male end into a grounded power outlet.
When using extension cords, use grounded heavy duty extension cords rated for 15
AMP service. To connect the foot pedal switch, insert the 2 pin male connector located at
the end of the foot pedal switch cord into the two pin receptacle located on the back
panel. Tighten the connector with the sleeve nut located on the foot pedal switch
connector.
After checking to be certain that the machine is set for the correct input voltage, switch
on the machine by pressing the Lighted On-Off Power Switch on the side panel.
WARNING!FOR INDOOR USEONLY. TOBE USEDBYADULTS OR
UNDERADULTSUPERVISION ONLY. NEVER OPEN UNIT WITH
POWERCONNECTED
POWERCONNECTIONANDCONTROLS
9
“E”
“H”
Figure 3 - BackPanel
“J”
Figure 1
“A” - Lighted On-Off Power Switch
“B” - Sliding Fuse Holder w/ Spare Fuse
“C” - Tension Adjustment Knob
“D” - Power Cord Socket
“E” - 115V / 230V Switch
Figure 2
“F” - Split Drum String Gripper
“G” - Tensioning Button
“H” - Control Panel
“I” - LED Display
Figure 3
“J” - 2 Pin Foot Pedal Switch Socket
Figure 1 -SidePanel Figure 2 - Front Panel
“A” “B”
“C” “D”
“F”
“G”
“I”

CONTROLPANELFUCTIONS AND
FEATURES
Release Button - Returns
winderto startingposition
andreleasestensionon
string.
10
Three digit (XX.X) LED Display -
DisplaysTensionSettingsor String
Length.
Lbs/Kgs Button -Changestension display from
Lbsto Kgs. Eachpress ofthe buttontogglesback
andforthbetweenLbsandKgs.
Speed Button - Changes pullingspeedof winder
fromFastto Slow. Slowspeedis recommended
forlowstretch strings,suchas Kevlar. Each
pressofthebuttontogglesbackand forthbetween
FastandSlowspeed.
String Length Meter Button -
Enablesstring lengthmeter function.
Eachpressofthebuttontoggles
backand forthbetween metersand
feetmeasurement. To switchback
totensioningfunction,pressthe
“Lbs/Kgs”button.
Calibration High/Low Buttons -
Usedduringthe calibration
procedureto selectthe highandlow
rangesofcalibration (seecalibration
instructionson page17).
Clear/Calibrate Button -Resets
theString LengthMeterdisplay to
zeroduringSLM operation. Also
usedin thecalibration procedure
(seecalibration instructionson
page17).

STRINGLENGTHMETEROPERATION
To enable the String Length Meter (SLM)
function, press the String Length function
key on the keypad. When the String Length
button is pressed, one of the Red LED
indicators below “M” or “FT” will light up to
indicate that the SLM function is enabled.
Pressing theStringLengthbuttonwilltoggle
between “M” and “FT” to set the measure-
ment units for either Meters (“M”) or Feet
(“FT”). Measurements are displayed in 0.1
increments.
To measure out a length of string from a reel
(sets can also be measured) insert one end
of the string through the string guide grom-
met (from the backside). While lifting the
clamp pad, insert the string through the
entrance hole of the face plate until it ap-
pears at the exit hole and release the clamp
pad. (The clamp pads will prevent debris
from entering the SLM.)
When the end of the string appears out of
the exit hole, press the “C” button on the
keypad to “Zero” the SLM, and the length of
string measured will be measured from the
point on the string located at the edge of the
exit hole. Pull the end of the string in a slow
steady fashion and the SLM will begin mea-
suringthelengthofstringpulledandindicate
themeasurementontheLEDdisplay.When
the desired length of string is measured, cut
the string at the exit hole.
NOTE : When reaching the end of a
length of string, pull the string through
very slowly to avoid inaccurate string measurement. The string length meter was
designed to measure strings between 1.10 mm (18 ga) and 1.45 mm (15 ga) at an accuracy
of +/- 0.3% of the indicated value and +/- 2 inches (50 mm) absolute. When measuring strings
smallerthan1.10mm(suchasbadmintonstrings) theerrorwillbe-2.5%oftheindicatedvalue
(up to 6” short in 40 ft) and +/- 2 inches (50 mm) absolute.
11

Clamp Head Operation
To clamp a string, lift the clamp head and
place the string between the jaws and de-
press the clamp head lever to secure the
string. The clamping pressure applied to the
string should be adjusted to provide suffi-
cient pressure to secure the string when
subjectedto the desired pullingtension. The
diamond coated gripper plates provide for
increased friction between the clamps and
the string to allow for reduced clamping
pressure while securing and holding the
string under tension.
QuickAction ClampBase Operation
Rotate the Base Locking Lever clockwise to
secure the clamp base to the turntable.
Reverse the clamping procedure to unlock
thestringclamp.TheLockingLeverisspring
loaded to assist the unlocking of the clamp
base.
The Locking Lever should be tightened
enough to prevent clamp base slippage on
the turntable, when the desired tension is
placed on the string. To go from the loose
position to the clamped position and back,
generally requires the travel permitted by the clamp base. If the travel is not sufficient to allow
smoothoperationof,adjusttheClampBase asoutlinedintheClampBaseAdjustmentsection.
QUICKACTIONCLAMPOPERATION
ClampHeadAdjustment
The clamp heads will need minor adjustments according
to what string type, construction, and gauge you are
using.
To adjust the gap (clamping pressure) between the clamp
jaws, insert the string through the racquet as if you were
beginning the main strings. Clamp the strings and pull
tension. If the string slips through the jaws of the clamp,
tightentheclampbycompressing the clampjawstogether
by hand while turning the Adjustment Knob, in the clock-
wise direction. If the clamp leaves impressions or dam-
ages the string, it may be excessively tight and should be
adjusted by turning the hex screw counter clockwise to
open the gap between the jaws. The clamp jaws must be cleaned periodically to be free from
dirt and any residue for them to grip properly.
Note: The string clamps supplied with your stringing machine can accomodate tight string
patterns such as badminton. Depending on the string pattern, the clamp may spread the
strings slightly which will not compromise the quality of the string job.
Adjustment
Knob
12

13
STRINGGRIPPEROPERATION
StringGripperOperation
To insert the string in the split drum string
gripper,wrapthefree endofthestringclock-
wise around the gripper drum and position
thestringbetweenthegripperjawsasshown
in the illustration.
The string must pass over the top half of the
gripper before being placed between the
diamond coated plates of the upper and
lower gripper jaws. Excessive slack in the
string should be removed before applying
tension. As the drum turns and applies ten-
sion to the string, the upper jaw is forced
down to clamp the string between the jaws.
CAUTION ! Never tension a string with your finger between the string and upper
gripper jaw as serious injury could result if your finger is caught between the
string and upper jaw during tensioning. CHILDREN SHOULD NEVER BE PERMITTED
TOOPERATETHISMACHINEWITHOUTADULTSUPERVISION.
TENSIONEROPERATION
TensioningaString
After wrapping the string around the grip-
perjaws,pressthetensioningbuttonswitch
on the front panel of the machine, or press
the foot pedal switch to activate the
tensioner. When the tension in the string
reachesthetensionsetting,theLEDdisplay
will begin to flash, and the string will be
ready to clamp off. In the event that one of
thekeys on thecontrolpanelare accidently
pressed while tensioning a string, the
tensioner will automatically reverse and
release the string being tensioned.
Tensioning
Button
SettingTension
The6500Elsutilizesarotaryadjustingknob
alongwithadigitalL.E.D.displaytoindicate
the set tension. To set the tension, rotate
the adjustment knob clockwise to de-
crease, counter-clockwise to increase,
until the desired tension is displayed. Ara-
mid fiber and Metallic strings will generally
string up tighter than synthetic or natural
gut strings, we recommend setting the
tension 4-5 lbs. lower than you would for
gut.

MOUNTINGTHEFRAME
14
InstallingtheRacquetHoldDown
With the lever in the up position, insert the
racquet hold down into the hole in the center
of the mounting post.
MountingPostAdjustment
Place the racquet frame over the white
racquet supports. Screw the the post out-
ward until the racquet supports are posi-
tioned on the inside surface of the racquet
frame.
AdjustingtheInnerRacquetSupports
The white racquet supports are adjustable to accommodate
all racquets and provide maximum support to the racquet
frame. Screw the the pads up or down so they contact the
frameatamaxiumheightwithoutblockingthegrommetholes.

15
MOUNTINGTHEFRAME
STRINGINGTHEFRAME
Installingthe CrossStrings
Weave the cross strings over and under the
main strings being careful to alternate the
weave direction of each consecutive cross
string so as to be opposite of the previously
installed cross string.
Once the final cross string is tensioned and
clamped,tieoffattheappropriateholespeci-
fied by the racquet manufacturer.
Removethestrungracquetbylooseningthe
shouldersupportsandsupportslidesinsmall
increments until the racquet is free from the
mounting system.
Installing the Main Strings
Tobeginstringingthemainstrings,insert the
two ends of the string through the two
center holes at the appropriate end of the
frameandcontinuethroughthecenterholes
on the opposite end of the racquet.
Secure one of the strings using a string
clamp and insert the free end into the string
gripper.
When tension is apllied to the string, clamp
off the tensioned section of string, release
string from tensioner, and proceed to thread string into next sets of holes. After the last main
strings are pulled, tie-off the strings at the appropriate hole specified by the racquet
manufacturer.
SecuringtheRacquetHoldDown
Depress the racquet hold down lever to secure the
racquet frame.

16
PATHERFINDERAWLOPERATION
The machine includes the Pathfinder string-
ing awl which creates a pathway between
or around strings to make inserting a string
through tight grommets easier and quicker.
Inserttheawlthroughthegrommetholeinthe
same manner as for traditional awls. The
Pathfinderawlmustbeintheclosedposition
before insertion.
Once the awl is inserted, pull the handle of
theawloutwardwhileholdingthe tipsection
in place, leaving the outer sheath in the
grommethole.
Insert the end of the string into the center of
the sheath.
While holding pressure on the string, slowly
pull the sheath out of the grommet hole to
leave the end of the string exposed.

Each stringing machine has been checked and calibrated at the factory using accurate load
sensing devices to ensure that the machine pulls at the correct tension. However, if you
suspect that your machine is not pulling at the correct tension, or if you would like to check
the pulling tension using a tension calibration device, you may do so.
To adjust the calibration of the 6500 Els machine :
1 - Set the tension so the display reads 30.0 lbs and turn off the machine.
2 - Turn on the machine while pressing the “C” button, and continue holding the
“C” button until the winder stops turning.
3 - Press the “L” button (the LED will be flashing with 30.0 displayed).
4 - Apply tension to a tension calibrator.
5 - Adjust the display to match the maximum reading observed on the
calibrator using the button with the yellow “UP Triangle” (Lbs/Kgs
button) or the button with the yellow “DOWN Triangle (String Length
Meter button).
Note : There will be a range of tension from the maximum tension at which
the tensioner stops pulling, to the minimum tension at which the tensioner
starts pulling again, for a given tension setting. The difference between the
maximum and minimum can vary between 2-4 lbs depending on the string and
calibration device used to calibrate the machine. Therefore, we recommend
that the tension setting of the machine be calibrated based on the maximum
reading to ensure consistency in the calibration procedure, which is also the
method used at the factory.
6 - Press the “L” button (display will stop flashing)
7 - With the calibrator still attached, increase the tension by turning the knob
until the calibrator shows approximately 70 lbs. (Note: display will stay on 30.0)
8 - Press the “H” button (the LED will be flashing with 70.0 displayed)
9 - Adjust the display to match the reading on the calibrator using the
button with the yellow “UP Triangle” (Lbs/Kgs button) or the button with
the yellow “DOWN Triangle (String Length Meter button).
10 - Press the “H” button (display should stop flashing)
If you have any problems with calibration of the machine, call the machine service
department of GAMMA Sports at 1-800-333-0337 for assistance.
TENSIONERCALIBRATION
17

CLEANINGINSTRUCTIONS
To thoroughly clean the diamond coated surfaces of
the clamp heads, remove the adjustment knob screw
to expose the inside surfaces of the clamps. Using the
cleaning stone provided with your machine (you can
also use a small tooth brush or a sharpening stone for
knives),scrubthediamondcoatedplatesuntilalldebris
isremoved.Cleananydustorresiduewithadampcloth
and re-assemble the clamp head.
To thoroughly clean the diamond coated surfaces of the
string gripper jaws, remove the gripper drum from the motor
shaft by loosening the drum attachment screw located at 5
o’clock on the side surface of the gripper drum, and sliding
the gripper drum off the shaft.
Note: To provide easier access to the attachment screw,
press the tensioning button switch to rotate the gripper
drum. When the screw is positioned at the top of the drum,
switchthepoweroffon the machinetostopthegripperdrum
from turning and remove the screw.
Removethegripperjawsfromthegripperdrumby removing
the 4 cap screws that attach the jaws to the drum. When
removing the grippers, take care to not loose the compres-
sionspringsinsidethecavitiesofthe lower gripper jaw. With
the gripper jaws removed from the drum, using the cleaning
stone provided with your machine (you can also use a small
tooth brush or a sharpening stone for knives), scrub the
diamondcoatedplatesuntilalldebrisisremoved.Cleanany
dustor residue withadamp cloth andwipedownthe gripper
drum surfaces to remove any residue as well.
To re-assemble the gripper jaws to the drum, fit the springs
over the spring retainers of the upper jaws and fit the upper
jawtothelowerjaw.Whileholdingthejawstogetherposition
them onto the drum and align the holes in the jaws to the
holes in the drum. Re-attach the jaws to the drum with the
capscrews.Theholeinthedrumforattachmentoftheupper
jawhasasmallsetscrewinsertedintotheholefromtheback
side of the drum. This set screw was adjusted at the factory
to provide the proper engagement of the upper jaw screw
with the drum. When tightened the upper jaw should slide
freely up and down. To tighten the upper jaw screw, place a hex wench in the small set screw
located on the back side to hold it in place when the attachment screw on the front side is
tightened.
18

19
TROUBLESHOOTINGTIPS
PROBLEM SOLUTION
String slips in clamps
String slips in string gripper
To check fuse, remove the power cord and pull the fuse holder straight out. Remove the
fuse from the clips and examine it. If it is burned out, replace it with the spare fuse and
replace the fuse holder in its socket. Supply power to the machine and check for proper
operation. If problems persist, contact Gamma Sports Customer Service at 1-800-333-
0337
•Adjust gap between jaws
•Clean clamp jaws
•Clean gripper jaws
•Make sure string is wrapped over
upper gripper jaw before inserting
between gripper jaw plates
String clamp slips on base •Clean base of clamp and turntable
glide bars
Electrical system does not function •Check power source / voltage setting
•Check power cord connection
•Check fuse
•Call Gamma Sports customer service
Gripper will not release string •Press & hold the Release Button
LED Display flickers or displays erratic
values •Check the 115v/230v Voltage Setting Switch for proper position