Gamma+ Progression STII User manual

OWNER'S MANUAL
Issue 5 - January 2009
STII
STRINGING MACHINE

1
LIMITED WARRANTY
GAMMA Sports (GAMMA) warrants to the original purchaser that the PROGRESSION stringing machine ("EQUIPMENT")
purchased is free from defects in materials and workmanship for a period of five (5) years from the date of original purchase
for mechanical parts (excluding electrical parts and string clamps), and for a period of one (1) year from the date of purchase
for all electrical parts and string clamps. Should any defects develop under normal use within the specified time periods,
GAMMA will at its option, repair or replace the defective EQUIPMENT provided it is returned to GAMMA prepaid at the
purchaser's expense. This warranty does not apply to any damage or defect caused by negligence, abuse, misuse,
unauthorized alteration, shipping, handling, or part wear and tear as a result of normal use.
Routine maintenance, adjustment, and cleaning required to ensure proper operation are the responsibility of the purchaser
and are not covered under the terms of this warranty. These include, but are not limited to: String Clamp Adjustment, as
describedonpage13,TensionCalibration,asdescribedonpage11,TensionerBrakeAdjustment,asdescribedonpage12,
and Clamp Base Locking Nut Adjustment, as described on page 13.
GAMMA'sobligationunderthiswarrantyislimitedtorepairorreplacementofdefectiveEQUIPMENT,andnooneisauthorized
to promise any other liability. GAMMA shall in no event be liable for any incidental or consequential damages.
To return defective EQUIPMENT, a return authorization (RA#) must be obtained from a GAMMA customer service
representative. The RA# must be marked on the outside of the shipping carton being returned. All returns must be shipped
prepaidbythecustomertoGAMMA.Pleaseretaintheoriginalshippingcartonandpackingmaterialsforanyfutureshipments.
GAMMA will not be responsible for machines which are not sent in the original undamaged packaging.
An Extended Warranty is available through a GAMMA customer service representative, call 800.333.0337 for details.
TABLE OF CONTENTS
PAGE1 ................................................................................................ WARRANTY
PAGE 2................................................................................................. FEATURES
PAGE 3.....................................................................ASSEMBLY INSTRUCTIONS
PAGE 5...........................................................................MOUNTING THE FRAME
PAGE 7.......................................................................... STRINGING THE FRAME
PAGE 10.................................................................................. PATHFINDER AWL
PAGE 11.........................................................MAINTENANCE & ADJUSTMENTS
PAGE 14.....................................................................TROUBLESHOOTING TIPS
PAGE 15...................................................................................................... NOTES
PAGE 16..............................................................................................PARTS LIST
PAGE 17....................................................................................PARTS DRAWING
STII
OWNER'S MANUAL

2
FEATURES
MACHINE FEATURES
 Professional Six Point Quick Mount Racquet Mounting System
- Accomodates All Racquets Without Adapters
 Parallel Jaw String Gripper w/ Diamond Dust Coated Gripping
Surfaces
 Professional Quick Action, Diamond Dust Coated, Fixed String
Clamps
 Durable Polystyrene Base Cover w/ Convenient Padded Tool
Tray
 Strong, Light Weight, Aluminum Construction

Remove and Discard Plastic Washers
3
ASSEMBLY INSTRUCTIONS
Turntable Installation
To install the turntable remove the four nuts
underneath holding the mounting bolts in
place. Position the turntable over the turn-
table pin and align the bolts with the holes in
the flange. Secure them with the included
allen wrench.
Note: When purchased with the optional
floor stand, it is most convenient to attach
the base to the floor stand at this point. See
instructions provided with the optional floor
stand.
Support Post Installation
To install the support posts you must first
removethemountingboltfromthemounting
platethat sets inside thecentral cavity of the
turntable. There are large holes stamped on
the underside of the turntable that allow you
to support the mounting plate with your fin-
gers while removing the mounting bolt.
After removing the mounting bolt, remove
and discard the plastic washers that are
installed for shipping purposes.
Support Post Installation (cont’d)
Place the support post onto the central slot
of the turntable. With your fingers placed
throughthelargeholeintheundersideofthe
turntable, press the mounting plate against
the inside top surface of the turntable while
aligning the hole in the support post with the
hole in the mounting plate and fix them with
the mounting bolt. Repeat procedure on to
attach the support post on the opposite side

4
ASSEMBLY INSTRUCTIONS
Installing the Tensioner
Remove the button head screw and washer
located at the end of the tensioner bar with
the 3 mm hex wrench provided. Slide the
tensioner onto the bar, being careful to align
the bar with all of the bearings and the drive
gear with the gear track. Replace the screw
andwasherintotheendof thetensionerbar.
Note: The tensioner bar is equipped with a
tensioner travel stop to limit travel of the
tensioneralongthebar.Seepage7formore
details about this feature.
Turntable Brake
The turntable may be locked in any position.
Flip the lever up to lock the turntable brake
and flip the down to release the turntable
brake.
Clamp Head Installation
The post of the string clamp head and tube
of the string clamp base are treated with
grease to provide protection against corro-
sion during shipping. Remove any exces-
sive 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,thepostandtubeshouldbetreated
with a light coating of machine oil to protect
thesurfacesagainstcorrosionandtoensure
smooth operation.

5
MOUNTING THE FRAME
Adjusting the Frame Support Posts
Loosen the lock bolts of the frame support
posts and space them apart with the frame
supportslidesseparatedbytheapproximate
length of the racquet head. Although it is not
required, it is good practice to center the
support posts on the turntable. Lock one of
the posts in position by tightening the lock
bolt and position the other post until the
frame support slide is positioned near the
inside surface of the racquet frame. Se-
curely tighten the lock bolt of the second
support post.
Caution: To avoid racquet damage, the
center posts should not contact the racquet
prior to locking down the support posts.
Tightening the Frame Supports
Tightenthe FrameSupportSlides by turning
the adjustment knob clockwise until snug
against the racquet frame and slight resis-
tance is felt.
Caution: Overtightening the Center Sup-
ports will stretch the head of the racquet and
could cause racquet damage.
FrameShoulderSupportAdjustment
Being sure the shoulder supports are free to
swivel in their mountings, simultaneously
rotatetheshouldersupportadjustmentknobs
clockwise until both shoulder supports gen-
tly and squarely contact the frame.

6
MOUNTING THE FRAME
SecuringtheFrameShoulderClamps
Lock the shoulder supports in position by
turning the knob at the base clockwise.
Repeat the adjustment procedure for the
remaining support post.
Re-tighten all of the frame supports in the
same order as before.
Do not overtighten any of the supports as
racquet damage may occur.
The supports should be tightened to the
point where the racquet frame will not move
inthe mounting system whenthe handle is grasped andattempts are made tomove it. Should
any supports lose contact with the frame while stringing, they should be re-tightened.

7
STRINGING THE FRAME
Travel Stop
Setting Tension
The STII utilizes a rotary adjusting knob
along with a linear tension scale to indicate
the tension setting. The scale is divided into
3 lb increments and each 1/3 turn of the
tensionknob changestensionby 1lb.Toset
the desired tension, rotate the tension knob
and align the mark on the spring guide with
the desired tension setting on the scale.
When the “0” mark on the knob aligns with
the line on the knob support the tension will
be that indicated on the scale. To increase
tension by 1 or 2 lbs turn the knob counterclockwise until the “1”or “2” mark on the knob aligns
with the line on the knob support. To decrease tension by 1 or 2 lbs, turn the knob clockwise
until the “2” or “1” mark on the knob aligns with the line on the knob support.
TensionerTravel Stop
The tensioner bar is equipped with a
tensioner travel stop to limit travel of the
tensioner along the bar and prevent contact
between the tensioner and the racquet
mounting system while stringing. The travel
stop is located about midpoint along the
tensioner bar below the gear track.
To disengage the stop, pull and hold the
knob, rotate 90 degrees and release. To
engage the stop, repeat the above proce-
dure until the travel stop pin protrudes be-
yond the opposite surface of the tensioner
bar.
Setting the Gripper Jaw Spacing
The gripper jaws of the tensioner are adjust-
able to accomodate varying string gauges.
If the string slips through the gripper jaws
while pulling tension, rotate the gripper jaw
adjustment screw counter-clockwise.
Ifthestringisdamagedwhilepullingtension,
rotatethegripperjawadjustmentscrewclock-
wise.
The jaws will be properly adjusted when
thereisenoughpressuretosecurelygripthe
string without causing damage to the string.

8
STRINGING THE FRAME
Clamping the First Main String
To begin stringing the main strings, thread
the two ends of the string through the two
center holes at the appropriate end of the
frame and continue through the opposite
center holes. Thread one end of the string
through the adjacent grommet hole and pull
excess by hand.
Secure one of the strings using a string
clamp.
Clamp Base 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 rotation permitted by
the slot in the clamp base. If the rotation is not sufficient to allow smooth operation of, adjust
the Clamp Base Locking Nut as outlined on page 13.
Clamp Head Operation
Quick Action Clamps are of a dual action
design where the clamp head and clamp
baseoperateindependentlyofoneanother.
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.Theclampingpressureappliedtothe
string should be adjusted to provide suffi-
cient pressure to secure the string when
subjected to the desired pulling tension.
The diamond coated gripper plates provide
forincreasedfrictionbetweentheclampsandthestringtoallowforreducedclampingpressure
while securing and holding the string under tension.
Note: If the string slips in the string clamp while tensioning, adjust the gap between the clamp
jaws per the instructions on page 13.

9
Pulling Tension
Wrap theloosesectionofstringoncearoundthe
roller guide and insert the string between the
diamond dust coated string gripper plates. Pull
the string perpendicular to the gripper plates
while slowly rotating the tensioner crank clock-
wiseuntilthebrakelever popsout ofthe latching
block. The string is now tensioned and can be
clampedinplacewiththeremainingfixedclamp.
Repeat the above steps until all main strings are
installed. Tie off ends of main strings as per
racquet manufacturers recommendations.
STRINGING THE FRAME
Weaving the Cross Strings
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.

10
PATHFINDERAWL
The machine includes the Pathfinder string-
ing awl which creates a pathway between
andaroundstringsto makeinsertingastring
through tight grommets easier and quicker.
Insert the awl through the grommet hole in
thesamemanneras fortraditional awls.The
Pathfinderawlmustbeintheclosedposition
before insertion.
Once the awl is inserted, pull the handle of
the awl outward while holding the tip section
in place, leaving the outer sheath in the
grommet hole. 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.

11
MAINTENANCE &ADJUSTMENTS
Tension Calibration Procedure
Step 1
Setthe tension to 60lbs. as indicated bythe
linearscaleandrotaryknob.Placethestring
on one end of a tension calibrator into a
string clamp and secure. Place string lo-
cated on the other end of the calibrator into
the string tensioner and apply tension. If the
brake lever releases before 60 lbs. or after
60 lbs., the tension head should be cali-
brated as follows.
Step 2
Loosen the 1.5 mm locking set screw (A)
located on the side of the latching block as
shown. The set screw is used to hold the
adjustment screw in place.
Step 3
Iftheleverreleases before60lbs.,usingthe
supplied L-shaped hex wrench, turn the
adjustment screw (B) located on the left
side of the latch block counter-clockwise to
increase the engagement of the brake re-
leaselatchwiththebrakelever.Repeatstep
1 and adjust until the correct tension is
indicated on the calibrator.
If the tension indicated in step 1 is greater
than 60 lbs., turn the adjustment screw
clockwise to reduce the engagement of the
brake release latch with the brake lever.
Repeat step 1 and adjust until the correct
tension is indicated on the calibrator.
Tightenlocking setscrew(A) when finished.
B
A

12
Adjusting the Tensioner Brake
After stringing many racquets, the brake of
the tensioner may need to be adjusted.
With the brake lever engaged, loosen the
lock bolt located on the back side of the
tensioner frame with the 4mm hex wrench.
Note: The lock bolt should only be loosened
enough to be turned by hand and must not
be removed completely.
Adjusting the Tensioner Brake
With the lock bolt loosened and the brake
lever engaged in the latch, insert the 6 mm
hexwrenchthroughtheholeinthetensioner
cover and into the (B) brake lever adjusting
bolt.
B - Brake Lever Adjustment Bolt
Adjusting the Tensioner Brake
To tighten the braking mechanism, turn the
brakeleveradjustingbolt counterclockwise
about1/8turn. Retightenthelockboltonthe
back side of the tensioner frame and check
for brake tightness. The tensioner should
move freely along the track with the brake
lever engaged and should hold tension with
thebrakeleverreleased.Ifmore adjustment
is needed, repeat steps above until properly
adjusted.
Note: Cover removed for clarity
MAINTENANCE &ADJUSTMENTS
A - Lock Bolt
A
B

13
MAINTENANCE &ADJUSTMENTS
ClampBaseLockingNutAdjustment
In the event the Locking Lever rotation is
insufficient to ensure smooth operation of
the clamp base, very minor adjustments to
the Clamp Base Locking Nut can be made
with the supplied 17mm socket. Tighten or
loosen the locking nut in very small incre-
mentstoprovidemoreclampingpressureor
running clearance as needed.
Adjusting the Clamp Jaws
The Quick Action Clamps 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
youwerebeginningthemainstrings.Clampthestrings
and pull tension. If the string slips through the jaws of
theclamp, tightentheclampbycompressingtheclamp
jaws together by hand while turning the Adjustment
Knob, in the clockwise direction. If the clamp leaves
impressions or damages the string, it may be exces-
sively tight and should be adjusted by turning the hex
screw counter clockwise to open the gap between the jaws. The clamp jaws should be
cleaned periodically to be free from dirt, oil and any string coating for them to grip properly.
Note: The string clamps supplied with your stringing machine can accomodate tight string
patternssuchasbadminton.Dependingonthestringpattern,theclampmayspreadthestrings
slightly which will not compromise the quality of the string job. String clamps designed
specifically for badminton racquets are available.
Adjustment
Knob
Quick Action Clamp Base Removal
Quick Action clamp bases can be removed
from the turntable for maintenance or clean-
ing by removing clamp stop located at the
endoftheslotintheturntable.Toremovethe
clamp stop, remove the two screws holding
theclampstopinplacefromtheundersideof
the turntable. Lift the clamp stop out of the
slot, slide the clamp base to the end of the
slot and lift it out. Replace the clamp base
and clamp stop in reverse order.

CARE & CLEANING
With time and use, the clamping surfaces of your machine may become oily or dirty and
result in string or clamp slippage while stringing. Periodic cleaning of the String Clamps,
String Clamp Base, and String Gripper is recommended. Knife sharpening stones work well
for cleaning the diamond coatied string clamping surfaces. Cleaning with a solvent such as
isoproyl alcohol and a mild abrasive tool such as a toothbrush also works well to remove oily
or greasey build up.
14
TROUBLESHOOTING TIPS
PROBLEM SOLUTION
String slips in clamps - Adjust gap between clamp jaws
- Clean clamp jaws
String slips in gripper - Adjust gripper jaws spacing
- Clean gripper jaws
String clamp base slips on turntable - Clean bottom of clamp & glide bar
with alcohol
- Adjust clamp base locking nut
Tensioner slips on Tensioner Bar - Clean tensioner brake disc
after brake lever is released - Adjust tensioner brake lever
String tension too tight or too loose - Check tension using a tension
calibrator, adjust machine
calibration if necessary

15
NOTES

16
PARTS LIST
PART #
5
6A
8A
9
14
21A
104
105
133
140
141
142
143
144
146A
148L
148R
189
190
192
203
270
282
283
285
286
296A
320
327
335
336
337
MQAC
MDCSC
DESCRIPTION
RUBBER FEET
CAP SCREW- M8
SET SCREW
WASHER- M8
WASHER- M10
FRAME SUPPORT SLIDE
TENSIONER ASSEMBLY
RETAINER SCREW
FRM SUPP SCREW & KNOB
MTNG STAND TOP PLATE
MTNG STAND PAD
SUPPORT ARM- LEFT
SUPPORT ARM- RIGHT
SUPPORT LOCK KNOB
ARM ADJ KNOB & SCREW
SHOULDER V-CLAMP
SHOULDER V-CLAMP
PII LOWER TRAY PAD
PII UPPER TRAY PAD
PII ST PS BASE COVER
TT SCREWS
SUPP MOUNTING PLATE
TURNTABLE
TT END CAP
TT END CAP- RIGHT
TT END CAP- LEFT
SUPPORT POST
BRAKE RING
TURNTABLE PIN
PII ST ALUMINUM BASE
TENSIONER BAR
BRAKE BOX (ST)
TALL QA BASE CLAMP
METAL STRING CLAMP
71
98
109
110
171
196
251
MA
MFSPP
MMSPP
MMSSA
MPSA
MBFC
MDCSC
MGSMC
MPG
MPS
MPXFS
MTC
SGSM
6MM T-HANDLE HEX WRENCH
BOX WRENCH- 10MM
NEEDLE NOSE PLIERS
BENT NOSE PLIERS
DIAGONAL CUTTERS
17MM SOCKET
HEX WRENCH SET
STRINGERS AWL
FRAME SUPP PADS
SQUASH (SQ)
SHORT BADMINTON (SB)
TENNIS (T)
BADMINTON (B)
TENNIS SHLDER SUPP PADS
SHLDER SUPP PADS (L TO R)
RACQUETBALL
BADMINTON
PATHFINDER AWL
BAD FLOATING CLAMP
FIXED BAD STRING CLAMP
MACHINE COVER
STARTING CLAMP
POLISHING STONE
FLOOR STAND
CALIBRATOR
STRINGER’S MAT
TOOLS &ACCESSORIES
OPTIONALTOOLS & ACCESS

17
MFSPP
SQ SB T B
5
104
MQAC MDCSC
335
192
189
MMSPP
320
190
337
270
21A
9
282
105
6A
143
144
140141
146A
283 285
286
336
327
MMSPP MMSSA
8A
MFSPP
296A
133 14
148L
142
PARTS DRAWING

GAMMA SPORTS
200 Waterfront Drive
Pittsburgh, Pennsylvania 15222
Phone: [phone] Fax: [phone]
Visit our website at www.gammasports.com
Copyright 2009 GAMMA Sports - All Rights Reserved