Gamma Sports STII User manual

MMAN-31
(MPST2-13)
GAMMA SPORTS
200 Waterfront Drive
Pittsburgh, Pennsylvania 15222
Phone: [phone] Fax: [phone]
Visit our website at www.gammasports.com
Copyright 2012 GAMMA Sports - All Rights Reserved
OWNER’S MANUAL
Issue 7 - December 2012
STII
STRINGING MACHINE

19
PARTS DRAWING
MFSPP11
SQ SB TB
5
104
MQAC12
MDCSC13
335
MMSPP13
320
192
337
270
21A
9
360
105
6A
356
144
140
141 146A
283
285
286
336
327
8A
133
14
357
MBMSP11
358 289
371

18
PARTS LIST
5 RUBBER FOOT
6A CAP SCREW- M8x30
8A SET SCREW
9 WASHER- M8
14 WASHER- M10
21A FRAME SUPPORT SLIDE
104 TENSIONER ASSEMBLY
105 RETAINER SCREW
133 FRAME SUPP SLIDE SCREW
140 MTNG STAND TOP PLATE
141 MTNG STAND TOP PAD
144 SHLDER SUPP LOCK KNOB
146 SUPP ARM ADJUST KNOB
192 PII STII BASE COVER
203 TT SCREWS*
270 SUPP MOUNTING PLATE
283 TT END CAP
285 TT END CAP- RIGHT
286 TT END CAP- LEFT
289 TT HANDLES
320 BRAKE RING
327 TT PIN
335 PII STII ALUMINUM BASE
336 WINDER BAR
337 BRAKE BOX
356 QM ARM (LONG) RIGHT
357 QM ARM (LONG) LEFT
358 QM STAND
360 TURNTABLE TT7
371 SHOULDER V-MNT (BLK)
MDCSC13 UNIV DC STRING CLAMP
MQAC12 QA CLAMP BASE TALL TT7/TT8
71 6MM T-HANDLE HEX WRENCH
98 10MM WRENCH*
109 NEEDLE NOSE PLIERS*
110 BENT NOSE PLIERS*
171 DIAGONAL CUTTERS*
196 17MM SOCKET*
251 HEX WRENCH SET*
MA STRINGER’S AWL*
MFSPP11 FRAME SUPPORT PADS
SHORT BADMINTON (SB)
SQUASH (SQ)
TENNIS (T)
TAPERED BADMINTON (B)
MMSPP13 V-MNT SHOULDER SUPP PADS
MBSMP BADM SHOULDER SUPP COVER
MPSA PATHFINDER AWL*
* (NOT SHOWN)
MBFC BADM FLOATING CLAMP
MBFS-11 BADM HEAD FRAME SUPP
MDCSC BADM FIXED CLAMP
MGSMC MACHINE COVER
MPG STARTING CLAMP
MPS CLEANING STONE
MPXFS FLOOR STAND
MTC CALIBRATOR
SGSM STRINGER’S MAT
MBMSS11 BADM MNTNG SYS UPGRADE
OPTIONAL TOOLS & ACCESS
PART # DESCRIPTION TOOLS & ACCESSORIES
3
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 pur-
chase 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
described on page 16, Tension Calibration, as described on page 14, Tensioner Brake Adjustment, as described on page
15, and Clamp Base Locking Nut Adjustment, as described on page 16.
GAMMA’s obligation under this warranty is limited to repair or replacement of defective EQUIPMENT, and no one is authorized
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 representa-
tive. The RA# must be marked on the outside of the shipping carton being returned. All returns must be shipped prepaid by
the customer to GAMMA. Please retain the original shipping carton and packing materials for any future shipments. GAMMA
will not be responsible for machines which are not sent in the original undamaged packaging.
A GAMMA Care Service Plan is also available through GAMMA customer service, call 880.333.0337 for details.
STII
OWNER’S MANUAL
TABLE OF CONTENTS
WARRANTY ............................................................................................... PAGE 3
FEATURES.................................................................................................. PAGE 4
ASSEMBLY INSTRUCTIONS ..................................................................... PAGE 5
MOUNTING THE FRAME ...........................................................................PAGE 7
STRINGING THE FRAME........................................................................... PAGE 9
ADDITIONAL FEATURES ......................................................................... PAGE 12
PATHFINDER AWL.................................................................................... PAGE 13
MAINTENANCE & ADJUSTMENT............................................................ PAGE 14
TROUBLESHOOTING TIPS .................................................................... PAGE 17
PARTS LIST ............................................................................................ PAGE 18
PARTS DRAWING..................................................................................... PAGE 19

4
FEATURES
MACHINE FEATURES
 Manual Spring Tension Winder with 11 to 89 lbs Tension Range
 Patented Roller Guide for Maximum Accuracy and Consistency
 Parallel Jaw Gripper with Diamond Dust Coated Gripping Sur-
faces
 Professional Six Point “Quick Mount” Racquet Mounting Sys-
tem- Accommodates All Racquets
 Professional “Quick Action” Dual Action, Rotating, Metal Fixed
String Clamps with Diamond Dust Coating
Durable Polystyrene Base Cover with Convenient Padded Tool
Tray
Strong, Light Weight, Aluminum Construction
17
TROUBLESHOOTING TIPS
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 coated string clamping surfaces. Cleaning with a solvent such as isopropyl alcohol
and a mild abrasive tool such as a toothbrush also works well to remove oily or greasy build up.
PROBLEM SOLUTION
String slips in clamps - Adjust gap between clamp jaws
- Clean clamp jaws
String slips in gripper - Clean gripper jaws
- Adjust gripper jaw stop screw
String clamp base slips on turntable - Clean bottom of clamp & top of turntable with
alcohol
- Adjust clamp base locking nut
Tensioner moves towards racquet after
brake lever is released - Clean tensioner disc brake
- Adjust tension brake
String tension too tight or too loose - Check tension using a tension calibrator,
adjust machine calibration if necessary

16
Adjusting the String Clamp Jaw
Spacing
The string clamps will need minor adjust-
ments according to what string type, construc-
tion, 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 begin-
ning the main strings. Clamp the strings
and pull tension. If the string slips through
the jaws of the clamp, tighten the clamp
by squeezing the clamp 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 excessively tight and should be adjusted by
turning the Adjustment Knob 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 residue
to grip properly. Knife sharpening stones are excellent for removing build-up on the diamond
coated surfaces and are available.
Adjustment
Knob
MAINTENANCE & ADJUSTMENTS
Clamp Base Locking NutAdjustment
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 increments to
provide more clamping pressure or running
clearance as needed.
Quick Action Clamp Base Removal
Quick Action clamp bases can be removed
from the turntable for maintenance or cleaning
by removing clamp stop located at the end
of the slot in the turntable. To remove the
clamp stop, remove the two screws holding
the clamp stop in place from the underside of
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.
5
Support Post Installation
To install the support posts you must first
remove the mounting bolt from the mounting
plate that sets inside the central 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 fingers
while removing the mounting bolt.
After removing the mounting bolt, remove
and discard the plastic washers that are
installed for shipping purposes.
Remove and Discard Plastic Washers
ASSEMBLY INSTRUCTIONS
Turntable Installation
To install the turntable position it over the
turntable pin and align the bolts (included in
separate bag) with the holes in the flange.
Secure them with the included 6mm allen
wrench.
Winder Bar Installation
To install the winder bar, slide over the post
on the base and secure it with the 2 allen
set screws.
Note: When purchased with the optional floor
stand, it is most convenient to attach the base
to the floor stand at this point. See instruc-
tions provided with the optional floor stand.

6
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 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.
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
and washer into the end of the tensioner bar.
Note: The tensioner bar is equipped with
a tensioner travel stop to limit travel of the
tensioner along the bar. See page 10 for
more details about this feature.
Support Post Installation (cont’d)
Place the support post onto the central slot
of the turntable. With your fingers placed
through the large hole in the underside of the
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
of the turntable.
15
MAINTENANCE & ADJUSTMENTS
Adjusting the Tensioner Brake
After stringing many racquets, the brake
of the tensioner may need to be adjusted.
With the brake lever engaged in the latch,
insert the 6mm allen wrench into the bolt (A)
located at the base of the brake lever. It can be
accessed through the hole on the face of the
tensioner cover (above the ‘GAMMA’ logo).
Note: The tensioner cover does not need to
be removed for the adjustment. The cover
has been removed in the pictures for illustra-
tion purposes.
To tighten the braking mechanism, turn the
set screw (A) counter clockwise by about 1/8
turn. Re-tighten the allen screw (B) on the
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
the brake lever released. If more adjustment
is needed, repeat steps above until properly
adjusted.
While holding the 6mm brake lever adjust-
ment bolt (A), loosen the hex bolt (B) located
on the back side of the tensioner frame with
the 4 mm allen wrench.
Note: The hex bolt should only be loosened
and must not be completely removed.
A
B

14
MAINTENANCE & ADJUSTMENTS
If the lever releases before 60 lbs., using
the 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 release
latch with the brake lever. Repeat step 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 clock-
wise 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.
Tighten locking set screw (A) when finished.
B
A
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.
Tension Calibration Procedure
Set the tension to 60 lbs. as indicated by the
linear scale and rotary knob. Place the string
on one end of a tension calibrator into a string
clamp and secure. Place string located on
the other end of the calibrator into the string
tensioner and apply tension. If the brake lever
releases before or after 60 lbs., the tension
head should be calibrated as follows.
7
Adjusting the Frame Support Posts
Loosen the lock bolts of the frame support
posts and space them apart with the frame
support slides separated by the approximate
length of the racquet head. Although it is not
required, it is good practice to center the sup-
port 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. Securely 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.
MOUNTING THE FRAME
Tightening the Frame Supports
Tighten the Frame Support Slides by turn-
ing the adjustment knob clockwise until
snug against the racquet frame and slight
resistance is felt.
Caution: Overtightening the Center Supports
will stretch the head of the racquet and could
cause racquet damage.
Frame Shoulder SupportAdjustment
Being sure the shoulder supports are free
to swivel in their mountings, simultaneously
rotate the shoulder support adjustment knobs
clockwise until both shoulder supports gently
and squarely contact the frame.

8
MOUNTING THE FRAME
Securing the Frame Shoulder Clamps
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 in the
mounting system when the handle is grasped and attempts are made to move it. Should any
supports lose contact with the frame while stringing, they should be re-tightened.
13
PATHFINDER AWL
Once the awl is inserted, pull the handle of
the awl outward while holding the tip section
in place. This leaves the outer sheath in the
grommet hole. Insert the end of the string
into the outer sheath.
While holding the string, slowly pull the sheath
out of the grommet hole to leave the free end
of the string exposed.
The machine includes the pathfinder string-
ing awl which creates a pathway between
or around strings to make inserting a string
through blocked grommets easier and
quicker.
Insert the awl through the grommet hole in
the same manner as for traditional awls. The
pathfinder awl must be in the closed position
before insertion.

12
ADDITIONAL FEATURES
Badminton Shoulder Support Protec-
tion Pad Installation
Slide the badminton shoulder support cover
over the shoulder supports. There is no need
to remove the tennis shoulder supports.
Note: An optional badminton frame support
for the head of the racquet is available.
Locking the Turntable
The turntable may be locked in any position.
Rotate the lever down to lock the turntable
and up to release the turntable.
9
Clamp Head Operation
Quick Action Clamps are of a dual action
design where the clamp head and clamp
base operate independently of one another.
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 sufficient
pressure to secure the string when subjected
to the desired pulling tension. 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.
Note: If the string slips in the string clamp while tensioning, adjust the gap between the clamp
jaws per the instructions on page 16.
Clamp Base Operation
Rotate the Base Locking Lever clockwise
to secure the clamp base to the turntable.
Reverse the clamping procedure to unlock
the string clamp. The Locking Lever is
spring 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 16.
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.

10
STRINGING THE FRAME
Travel Stop
Setting the Gripper Jaw Spacing
The gripper jaws of the tensioner are adjust-
able to accommodate varying string gauges.
If the string slips through the gripper jaws
while pulling tension, rotate the gripper jaw
adjustment screw counter-clockwise.
If the string is damaged while pulling tension,
rotate the gripper jaw adjustment screw
clockwise.
The jaws will be properly adjusted when
there is enough pressure to securely grip the
string without causing damage to the string.
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 ten-
sion knob changes tension by 1 lb. To set 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.
Tensioner Travel 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 procedure until the
travel stop pin protrudes beyond the opposite
surface of the tensioner bar.
11
Pulling Tension
Wrap the loose section of string once around
the 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 clockwise until
the brake lever pops out of the latching block. The
string is now tensioned and can be clamped in place
with the remaining fixed clamp.
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, tie off at the appropriate hole speci-
fied by the racquet manufacturer.