JUKI LU-2810 Series User manual

LU-2810, 2810-7, 2860, 2860-7
INSTRUCTION MANUAL

i
CONTENTS
BEFORE OPERATION ........................................................................................................ 1
1. SPECIFICATIONS.......................................................................................................... 2
2. INSTALLATION.............................................................................................................. 2
3. ADJUSTING THE BELT TENSION (LU-2810, LU-2860) .............................................. 5
4. ATTACHING THE BELT COVER (LU-2810, LU-2860) ................................................. 5
5. INSTALLING THE OIL SHIELD..................................................................................... 6
6. PNEUMATIC COMPONENTS (LU-2810-7, LU-2860-7)................................................ 6
7. INSTALLING THE THREAD STAND............................................................................. 8
8. LUBRICATION ............................................................................................................... 9
9. ATTACHING THE NEEDLE ......................................................................................... 11
10. ATTACHING AND REMOVING THE BOBBIN ............................................................ 12
11. THREADING THE HOOK ............................................................................................ 12
12. INSTALLING THE THREAD GUIDE PIN..................................................................... 13
13. WINDING A BOBBIN ................................................................................................... 13
14. THREADING THE MACHINE HEAD........................................................................... 14
15. ADJUSTING THE STITCH LENGTH........................................................................... 16
16. THREAD TENSION...................................................................................................... 17
17. THREAD TAKE-UP SPRING ....................................................................................... 18
18. HAND LIFTER.............................................................................................................. 19
19. ADJUSTING THE PRESSURE OF THE PRESSER FOOT ........................................ 19
20. NEEDLE-TO-HOOK RELATION.................................................................................. 20
21. ADJUSTING THE HOOK NEEDLE GUARD ............................................................... 21
22. ADJUSTING THE BOBBIN CASE OPENING LEVER................................................ 22
23. POSITION OF THE COUNTER KNIFE AND ADJUSTMENT OF THE KNIFE
PRESSURE.................................................................................................................. 23
24.
ADJUSTING THE AMOUNT OF THE ALTERNATING VERTICAL MOVEMENT OF THE
WALKING FOOT AND THE PRESSER FOOT .............................................................. 24
25. SEWING SPEED TABLE ............................................................................................. 24
26. RESETTING THE SAFETY CLUTCH.......................................................................... 25
27. ADJUSTING THE AUTOMATIC PRESSER FOOT LIFTER........................................ 26
28. FIXING THE FEED ADJUSTING DIAL........................................................................ 27
29. NORMAL-/REVERSE-FEED STITCH NEEDLE ENTRY POINTS ALIGNMENT AT THE
TIME OF AUTOMATIC REVERSE FEED STITCHING (LU-2810-7, LU-2860-7)........ 28
30. OPERATION SWITCHES (LU-2810-7, LU-2860-7)..................................................... 29
31. KNEE SWITCH ............................................................................................................ 31
32. MOTOR PULLEY AND V-BELT (LU-2810, LU-2860) ................................................. 34
33. TROUBLES IN SEWING AND CORRECTIVE MEASURES....................................... 35

– 1 –
BEFORE OPERATION
• Beforeyouputthemachineintooperationforthersttimeaftertheset-up,cleanitthoroughly.
 Removealldustgatheringduringtransportationandoilitwell.
• Conrmthatvoltagehasbeencorrectlyset.
 Conrmthatthepowerplughasbeenproperlyconnectedtothepowersupply.
• Neverusethemachineinthestatewherethevoltagetypeisdifferentfromthedesignatedone.
• Thedirectionofnormalrotationofthemachineiscounterclockwiseasobservedfromthepulleyside.
 Takecarenottoallowthemachinetorotateinthereversedirection.
• Neveroperatethemachineunlessthemachineheadandtheoiltankhavebeenlledwithoil.
• Foratestrun,removethebobbinandtheneedlethread.
• Fortherstmonth,decreasethesewingspeedandrunthesewingmachineataspeedof80%orlessof
themaximumsewingspeed.Astothemaximumsewingspeed,see"25. SEWING SPEED TABLE" p.24.
• Operatethehandwheelafterthemachinehastotallystopped.
CAUTION :
Check the following so as to prevent maloperation of and damage to the machine.

– 2 –
Model LU-2810(1-needle)
LU-2810-7
(1-needlewiththread
trimmer)
LU-2860(2-needle)
LU-2860-7
(2-needlewiththread
trimmer)
Sewingspeed Max.3,000sti/min Max.2,700sti/min
See "25. SEWING SPEED TABLE" p.24.
Stitchlength(max.) Normalfeed:9mmReversefeed:9mm
Needle GROZ-BECKERT135x17
(Nm125toNm180)(Standard:Nm160)
Thread #30to#5(US:#46to#138,Europe:20/3to60/3)
Hook Vertical-axis2.0-foldcapacityhook
Liftofpresserfoot Handlifterlever:10mmBykneelifter,Auto-lifter:20mm
Lubricatingoil JUKINewDefrixOilNo.1orJUKIMACHINEOIL#7
Noise
-Equivalentcontinuous
emissionsound
pressurelevel(LpA)at
theworkstation:
A-weightedvalueof
83.0dB;(IncludesKpA
=2.5dB);accordingto
ISO10821-C.6.2-ISO
11204GR2at3,000
sti/min.
-Soundpowerlevel
(LWA);
A-weightedvalueof
88.5dB;(IncludesKWA
=2.5dB);accordingto
ISO10821-C.6.2-ISO
3744GR2at3,000sti/
min.
-Equivalentcontinuous
emissionsound
pressurelevel(LpA)at
theworkstation:
A-weightedvalueof
83.0dB;(IncludesKpA
=2.5dB);accordingto
ISO10821-C.6.2-ISO
11204GR2at3,000
sti/min.
-Soundpowerlevel
(LWA);
A-weightedvalueof
88.5dB;(IncludesKWA
=2.5dB);accordingto
ISO10821-C.6.2-ISO
3744GR2at3,000sti/
min.
-Equivalentcontinuous
emissionsound
pressurelevel(LpA)at
theworkstation:
A-weightedvalueof
83.0dB;(IncludesKpA
=2.5dB);accordingto
ISO10821-C.6.2-ISO
11204GR2at2,700
sti/min.
-Soundpowerlevel
(LWA);
A-weightedvalueof
88.5dB;(IncludesKWA
=2.5dB);accordingto
ISO10821-C.6.2-ISO
3744GR2at2,700sti/
min.
-Equivalentcontinuous
emissionsound
pressurelevel(LpA)at
theworkstation:
A-weightedvalueof
83.0dB;(IncludesKpA
=2.5dB);accordingto
ISO10821-C.6.2-ISO
11204GR2at2,700
sti/min.
-Soundpowerlevel
(LWA);
A-weightedvalueof
88.5dB;(IncludesKWA
=2.5dB);accordingto
ISO10821-C.6.2-ISO
3744GR2at2,700sti/
min.
1. SPECIFICATIONS
2. INSTALLATION
1) Carrythesewingmachinewithtwopersons.
Do not hold the handwheel.

– 3 –
3) Attaching the hinge seats and the support rub-
bers of the machine head
Fix hinge seat ❶, machine head support rubber
❷, and spacer 󱢽(one on the right side) sup-
plied with the machine on the table with nails ❸,
as illustrated in the gure.
For the LU-2860, add one more spacer to each
of the right and left sides of the table if the left
bed slide cannot be opened because of interfer-
ence with the table.
4) Attaching the oil pan
Fix the oil pan ❹supplied with the machine on
the table by tightening eight wood screws.
2) Do not put protruding articles such as the
screwdriver and the like at the location where
the sewing machine is placed.
❹
Operator’s side Table
Align
Align
5) Attach a lter ❺to the oil pan ❹as shown in
the gure.
❶
❷
❸
󱢽
❹
❺

–4–
Do not use the screws supplied the panel
instead of screws 󱢻supplied with the ma-
chine head.
7) Securelyattachheadsupportrod❼tothetable
untilitgoesnofurther.
8) Putreuxpipe❾intheoilreservoirofoilpan❽.
Securethepipeingroove󱢳.
9) Fixlter󱢴andlterclamp󱢵withtting󱢶.
6) Installhinge❺onthebedwithscrew❻.
Engagethehingewiththerubberhingeofthe
table.Then,placethemachineheadonthe
machineheadsupportrubber.
10) Mountspacers󱢷suppliedwiththemachine
headontheframe.
11) Installbracket󱢹onCPpanel󱢸withscrews󱢺
suppliedwiththepanel.
12) Installbracket󱢹onspacer󱢷withscrews󱢻
suppliedwiththemachineheadandwashers󱢼
suppliedwiththepanel.
❺
❼
❻
❽
❾
󱢳󱢴
󱢵
󱢶
󱢷
󱢸
󱢼
󱢹
󱢻
󱢺

–5–
3. ADJUSTING THE BELT TENSION (LU-2810, LU-2860)
Adjust the belt tension with the height of the motor
so that the belt sags 15 mm when the center of V
beltisappliedwitha9.8Nload.
15mm
Motor pulley
Handwheel
9.8N
4. ATTACHING THE BELT COVER (LU-2810, LU-2860)
(Installationprocedure)
1) PuttheV-beltonthesewingmachinepulley.
2) Installbeltcover❶onthemachinearm.
3) InstallbeltcoverB❷onthetable.
4) Mountthehandlesectionofthepulleywitha
screw.
WARNING :
To protect against possible personal injury due to abrupt start of the machine, be sure to start the
following work after turning the power off and ascertaining that the motor is at rest.
WARNING :
To protect against possible personal injury due to abrupt start of the machine, be sure to start the
following work after turning the power off and ascertaining that the motor is at rest.
❶
❷
V-belt

–6–
5. INSTALLING THE OIL SHIELD
Install oil shield ❶, supplied with the unit, on the
framewithscrews❷.
6. PNEUMATIC COMPONENTS (LU-2810-7, LU-2860-7)
(1) Installing the regulator
1) Installregulator(asm.)❶onmountingplate
❺withscrew❷,springwasher❸andnut❹
whicharesuppliedwiththeunit.
2) Installcouplings❻and❼onregulator❶.
3) Installmountingplate❺ontheundersideofthe
table.
4) Connectø6airtubecomingfromthesewing
machinetocoupling❻.
WARNING :
To protect against possible personal injury due to abrupt start of the machine, be sure to start the
following work after turning the power off and ascertaining that the motor is at rest.
WARNING :
To protect against possible personal injury due to abrupt start of the machine, be sure to start the
following work after turning the power off and ascertaining that the motor is at rest.
LU-2810, LU-2810-7
LU-2860, LU-2860-7
❷
❶
❺
❻
❼
❹
❸
❷
❶
❷
❶❷

–7–
❶
(2) Adjusting the air pressure
 Theoperatingairpressureis0.5to0.55MPa.
 Adjusttheairpressureusingairpressure
regulatingknob❶ofthelterregulator.
Decrease Increase
(3) Exhaust tube
 Passø8exhausttube❶comingfromthe
sewingmachinethroughhole❷inthetable.
 Inthecaseofhighhumidity,watermayowout
fromtheexhausttube.
❶
❷

–8–
7. INSTALLING THE THREAD STAND
Assemblethethreadstand,setituponthemachine
tableusingtheinstallationholeinthetableandtight-
en nut ❶gently.
WARNING :
To protect against possible personal injury due to abrupt start of the machine, be sure to start the
following work after turning the power off and ascertaining that the motor is at rest.
LU-2810, LU-2810-7
❶
LU-2860, LU-2860-7
❶

– 9 –
8. LUBRICATION
WARNING :
1. Do not connect the power plug until the lubrication has been completed so as to prevent accidents
due to abrupt start of the sewing machine.
2. To prevent the occurrence of an inammation or rash, immediately wash the related portions if oil
adherestoyoureyesorotherpartsofyourbody.
3. If oil is mistakenly swallowed, diarrhea or vomitting may occur. Put oil in a place where children
cannot reach.
 1.Whenusinganewsewingmachineforthersttimeorusingthesewingmachinewhichhasnot
beenusedforalongtime,runinthesewingmachineatasewingspeedof1,000sti/minorlessand
checktheoilquantityinthehookbeforeuse.Ifthequantityofoilinthehookisinsufcient,adjust
thequantityofoilbyturningtheoilquantityadjustingscrewcounterclockwisetoensurethatthe
oilquantityinthehookisadequate.Afterthat,adjustthequantityofoiltotheadequateone.(Refer
to "■Adjustingtheoilquantityinthehook"p.10.)
 2.Fortheoilforhooklubrication,purchaseJUKINEWDEFRIXOILNo.1(PartNo.:MDFRX1600C0)or
JUKIMACHINEOIL#7(PartNo.:MML007600CA).
3. Be sure to lubricate clean oil.
■Lubricationprocedure
Fill the oil tank with oil before operating the sewing
machine.
1) Fill the oil tank with JUKI NEW DEFRIX OIL
No.1 (Part No. : MDFRX1600C0) or JUKI
MACHINE OIL #7 (Part No. : MML007600CA)
using the oiler supplied with the machine from
section C.
2) Fill the oil tank with the oil until the top end of
oil amount indicating rod ❷comes between the
upper engraved marker line Aand the lower
engraved marker line Bof oil amount indicating
window ❶.
 Iftheoilislledexcessively,itwillleakfromthe
air vent hole in the oil tank or proper lubrication
willbenotperformed.Inaddition,whentheoil
isvigorouslylled,itmayoverowfromtheoil
hole.So,becareful.
3) Whenyouoperatethesewingmachine,rell
oil if the top end of oil amount indicating rod ❷
comes down to the lower engraved marker line
Bof oil amount indicating window ❶.
C
❶
B
A
❷

– 10 –
■Adjustingtheoilquantityinthehook
LU-2810,LU-2810-7
1) Remove rubber cap ❶.
2) Loosen nut ❷and turn oil amount adjustment
screw ❸to adjust the amount of oil in the hook.
Turning the screw clockwise Awill decrease the
amount of oil in the hook or counterclockwise B
will increase it.
3) Theappropriateamountofoil,whenasheetof
paperisplacedneartheperipheryofthehook,
istosuchanextentthatsplashesofoilfromthe
hookappearinapproximatelyvesecondsas
showninthegureontheleft.
A sheet of
paper
■Cleaningtheoillter
1) Loosen fastening plate ❶ontheback-owside.
Removeoillterjoint(asm.)❷ontheback-ow
side.
2) Cleanuplters❸,❹and ❺and oil reservoir
❻of the oil pan.
Be sure to clean up the oil reservoir of the
oilpanandtheltercaseapproximately
once a month.
Ifthelteriscloggedwithsoil,lubrication
fails resulting in trouble.
Inthecasetheoilquantityinthehookcan-
notbeadjustedtotheproper quantity,it
shouldbeadjustedbylooseningnut❹and
turningoilquantityadjustingscrew❺. The
oilquantityinthehookisincreasedbyturn-
ing the oil quantity adjusting screw coun-
terclockwiseC,orisdecreasedbyturningit
clockwise D.
Also check to be sure that the oil is fed to the
hookatthesewingspeedof1,000sti/min.
❸
❷
B
A
❶
❹
❺
C
D
❹
❺
❻
❸
❶
❷

– 11 –
❶
❷
❷
❶
9.ATTACHINGTHENEEDLE
Switch "off" the motor.
Use135x17needles.
1) Turn the handwheel to bring the needle bar to
the highest position of its stroke.
2) Loosen needle clamp screw ❷. Hold the needle
so that the long groove on needle ❶faces direct-
lytotherightfortheLU-2810and-2810-7,and
so that the long groove on each the two needles
facesinwardfortheLU-2860and-2860-7.
3) Push needle ❶deep into the needle clamp hole
until it will go no further.
4) Tighten needle clamp screw ❷rmly.
Long groove
❶
❷
Whenreplacingtheneedle,checktheclear-
ance provided between the needle and the
bladepointofhook.(Referto"20.NEEDLE-
TO-HOOKRELATION"p.20 and "21.
ADJUSTING THE HOOK NEEDLE GUARD"
p.21.)
Ifthere isnoclearance,the needleandthe
hook will be damaged.
LU-2810,LU-2810-7
LU-2860,LU-2860-7
WARNING :
Toprotectagainstpossiblepersonal injury duetoabruptstart of themachine,besure to startthe
following work after turning the power off and ascertaining that the motor is at rest.
Long groove
LU-2860,LU-2860-7
1) Loosen nut ❷and turn oil amount
adjustment screw ❸to adjust the
amount of oil in the hook.
Turning the screw clockwise Awill
decrease the amount of oil in the hook
or counterclockwise Bwill increase it.
2) Theappropriateamountofoil,when
a sheet of paper is placed near the
peripheryofthehook,istosuchan
extentthatsplashesofoilfromthehook
appearinapproximatelyveseconds
asshowninthegureontheleft.
A sheet of
paper
In the case the oil quantity in the
hookcannotbeadjustedtothe
properquantity,itshouldbead-
justedbylooseningnut ❹and
turningoilquantityadjusting
screw ❺. Theoil quantityin the
hook isincreasedbyturning the
oil quantity adjusting screw coun-
terclockwiseC,orisdecreasedby
turning it clockwise D.
Also check to be sure that the oil
is fed to the hook at the sewing
speedof1,000sti/min.
❷
❸
B
A
❹
❺
C
D

– 12 –
10. ATTACHING AND REMOVING THE BOBBIN
1) Liftlatch❶ofhook,andtakeoutthebobbin.
2) Putthebobbinintotheshaftinthehookcorrect-
lyandreleasethelatch.
1. Do not make the machine run idle with
the bobbin (bobbin thread). The bobbin
thread is caught in the hook. As a result,
the hook may be damaged.
2. Be careful so as not to get hurt with the
top end of the counter knife.
11. THREADING THE HOOK
1) Passthethreadthroughthreadpath❶in the
hookandthreadhole❷inthelever,anddraw
thethread.
 Now,thethreadwillbebroughttothreadhole
❷viathetensionspring.
2) Makesurethatthebobbinrevolvesinthedirec-
tionofthearrowwhenyoudrawthethread.
WARNING :
To protect against possible personal injury due to abrupt start of the machine, be sure to start the
following work after turning the power off and ascertaining that the motor is at rest.
WARNING :
To protect against possible personal injury due to abrupt start of the machine, be sure to start the
following work after turning the power off and ascertaining that the motor is at rest.
❶
❶
❷

– 13 –
1. This is the one-touch type bobbin wind-
er. When the bobbin is fully wound with
thread, bobbin thread clamp ❺automati-
cally returns to the initial position.
2. To stop bobbin winding before the bobbin
is fully wound with thread, turn the hand-
wheel with threading lever ❼held lightly
depressed to return bobbin thread clamp
❺to the initial position.
12. INSTALLING THE THREAD GUIDE PIN
Insert needle thread guide pin ❶into the corre-
sponding hole in top cover ❷.
・LU-2810, LU-2810-7: One needle thread guide pin
・LU-2860, LU-2860-7: Two needle thread guide pins
13. WINDING A BOBBIN
1) Pass the thread through sections ❶to ❹in the
numerical order.
2) Insert the thread from the rear side of looper
thread clamp ❺ and trim the thread. (The thread
end is retained under the looper thread clamp.)
3) Load a bobbin on bobbin winder shaft ❻.
4) Lift bobbin winder lever ❼in the direction of the
arrow.
5) When you start the sewing machine, the bobbin
rotates to automatically wind the thread on itself.
6) When the bobbin is lled up, the bobbin winder
lever automatically releases the bobbin and the
bobbin winder stops running.
1. The bobbin thread winding amount is ad-
justed by loosening setscrew ❽. The bob-
bin thread winding amount is increased
by moving bobbin wider lever ❼upward.
2. If the thread comes off the thread tension
controller, wind the thread on the interme-
diate thread guide by one turn.
❶
❺
❽
❼
❹
❸❷
❻
LU-2810, LU-2810-7
LU-2860, LU-2860-7
❶
❷
❶
❷

–14–
14. THREADING THE MACHINE HEAD
[LU-2810, 2810-7]
WARNING :
To protect against possible personal injury due to abrupt start of the machine, be sure to start the
following work after turning the power off and ascertaining that the motor is at rest.
❺
❷
❻
❸
❹
❼
󱢶
❼
❻
❺
❹
❸
❶
❾
❽
󱢳
󱢴
󱢵
Threadthemachineheadfollowing theorder
asillustratedinthegure.
* Pass thread through the right side of
thread guide 󱢴.
󱢴
󱢵
󱢶
󱢴
󱢵
󱢶
LU-2810-7 LU-2810

–15–
󱢶
❶❶
❼
❻
❺
❹
❸
❻
❺
❹
❸
❾❸
❹
❺
❻
❼
❷
󱢳
󱢴
󱢵❽
[LU-2860, 2860-7]
WARNING :
To protect against possible personal injury due to abrupt start of the machine, be sure to start the
following work after turning the power off and ascertaining that the motor is at rest.
Threadthemachinehead following the
orderasillustratedinthegure.
Right-hand
needle thread
Left-hand
needle thread
󱢴
󱢵
󱢶
LU-2860-7 LU-2860
󱢴
󱢵
󱢶

–16–
15. ADJUSTING THE STITCH LENGTH
Turnstandardfeedadjustingdial❶and2Pfeedad-
justingdial❷toalignthedesirednumberwithmark-
erdot❸onthemachinedial.
(1) Reverse feed stitchng
1) Pressdownreversefeedcontrollever❹.
2) Reversefeedstitchesaremadeaslongasyou
keeppressingtheleverdown.
3) Releasethelever,andthemachinewillrunin
thenormalfeeddirection.
(2) Manual one-touch reverse feed stitching
1) Presstouch-backswitch❺.
2) Reversefeedstitchesaremadeaslongasyou
keeppressingtheleverdown.
3) Releasetheswitch,andthemachinewillrunin
thenormalfeeddirection.
(3) Changing over the stitching pitch (LU-2810-7
and -2860-7)
1) Pressstitchingpitchchangeoverswitch❻to
changeoverthestitchlengthtotheonecor-
respondingtothescalemarkonthe2Pfeedad-
justingdial.(TheLEDontheswitchlightsup.)
1. Set 2P feed adjusting dial ❷at a value
smaller than the value set by standard
feed adjusting dial ❶.
2. Adjust the 2P feed adjusting dial when
the stitching pitch changeover switch is
placed in OFF.
3. Scale mark on the 2P feed adjusting
dial smaller than 3 (at which the dial is
stopped by the dial stopper) is used for
the 0 (zero) alignment of the 2P dial. Scale
marks smaller than 3 cannot be used.
Refer to "30. OPERATION SWITCHES (LU-
2810-7, LU-2860-7)" p.29 for the details of
the 2P device.
❸
❷
❶
❹
❺
❻
❸

–17–
(1) Adjusting the needle thread tension
1) TurnthreadtensionnutNo.1❶clockwiseAto
shortenthelengthofthreadremainingonthe
topofneedleafterthreadtrimming.Turnthenut
counterclockwiseBtolengthenit.
2) TurnthreadtensionnutNo.2❷clockwiseAto
increasetheneedlethreadtension,orcounter-
clockwiseBtodecreaseit.
Apply the same tension to both of the
thread tension nut No. 2.
In the case, the length of thread remaining
at the needle tip cannot be increased, re-
place the spring of tension controller No. 1
with 22945505 which is separately available.
16. THREAD TENSION
(2) Adjusting the bobbin thread tension
Turntension adjustmentscrew❸clockwise Ato
increasethebobbinthreadtension,orcounterclock-
wiseBtodecreaseit.
WARNING :
To protect against possible personal injury due to abrupt start of the machine, be sure to start the
following work after turning the power off and ascertaining that the motor is at rest.
❶
❷
B A
A
B
❸B
A

–18–
17. THREAD TAKE-UP SPRING
(1) When you want to change the stroke of the
thread take-up spring
1) Loosenscrew❷.Adjustthreadtake-upspring
❶bymovingitintheslot.
2) Loosenscrew❹.Adjustthreadtake-upspring
❸bymovingthreadtake-upspringadjusting
plate❺alongthreadtake-upspringbase❻.
* The LU-2810 and -2810-7 do not have thread
take-up spring ❸.
(2) When you want to change the tension of
the thread take-up spring
1) Toadjustthetensionofthreadtake-upspring❶,
loosennut❼rst.Turnspringshaft❽counter-
clockwisetoincreasethetensionorclockwise
todecreaseit.
 Aftertheadjustment,xthestudbytightening
nut ❼.
2) Tochangethetensionofthreadtake-upspring
❸,loosenscrew❾rst.Turnnut󱢳counter-
clockwisetoincreasethetensionorclockwise
todecreaseit.
 Aftertheadjustment,xnutbytighteningscrew
❾.
* The LU-2810 and -2810-7 do not have thread
take-up spring ❸.
WARNING :
To protect against possible personal injury due to abrupt start of the machine, be sure to start the
following work after turning the power off and ascertaining that the motor is at rest.
❷
❹
❻
❺
❸
❶
Decrease
Increase
󱢳
❼
❶❸❽
❾