Scantool 420GSHT User manual

METAL BAND SAW
420GSHT
INSTRUCTION MANUAL
RF-420-110811-R3

1
TABLE OF CONTENTS
1. OVERALL ASPECT ............................................................................................................................... 2
2.SAFETY RULES FOR ALL TOOLS.......................................................................................................... 3
3. SPECIFICATION................................................................................................................................... 5
4. FEARTURES........................................................................................................................................ 5
5. TRANSPORTATATION & INSTALLATION:............................................................................................. 6
6. MINIMUM ROOM SPACE FOR MACHINE OPERATION ..............................................................................7
7. MAKE PROPER TOOTH SELECTION.......................................................................................................7
8. BI-METAL SPEEDS AND FEEDS........................................................................................................... 8
9. USE OF MAIN MACHINE PARTS........................................................................................................... 10
10. MAINTAINING ................................................................................................................................... 14
11. OPERATING AND ADJUSTING VISE .................................................................................................... 15
12.SHUT-OFF LIMIT SWITCH HOLDER .................................................................................................... 15
13. HOW TO OPERATE HYDRAULIC UNIT ................................................................................................ 15
14. TROUBLE SHOOTING ........................................................................................................................ 16
15. CIRCUIT DIAGRAM............................................................................................................................. 18
16. EXPLODED DIAGRAM ....................................................................................................................... 20
17. PARTS LIST...................................................................................................................................... 22
CAUTION
Install saw blade and blade guard before
use. Set proper blade tension to prevent
any danger caused by damage saw blade
or work piece.

2
1. OVERALL ASPECT
Body Frame
Control Panel
Tension Adj. Handle
Angle Sale
Vice
Reducer
Stand
Base

3
WARNING: FAILURE TO FOLLOW THESE RULES
MAY RESULT IN SERIOUS PERSONAL INJURY
As with all machinery there are certain hazards involved with operation and use of the machine. Using
the machine with respect and caution will considerably lessen the possibility of personal injury. However,
if normal safety precautions are overlooked or ignored, personal injury to the operator may result.
This machine was designed f or certain applications only. We strongly recommend that this machine
NOT be modified and/or used for any application other than for which it was designed. If you have any
questions relative to its application DO NOT use the machine until you contact with us and we have
advised, you.
Your machine might not come with a power socket or plug. Before using this
machine, please do ask your local dealer to install the socket or plug on the
Power cable end.
2.SAFETY RULES FOR ALL TOOLS
A. USER:(1). WEAR PROPER APPAREL. No loose clothing, gloves, rings, bracelets, or other jewelry to get
caught in moving parts.
Non-slip footwear is recommended. Wear protective hair covering to contain long hair.
(2). ALWAYS WEAR EYE PROTECTION. Refer to ANSLZ87.1 standard for appropriate recommendations.
Also use face or dust mask if cutting operation is dusty.
(3). DON'T OVERREACH. Keep proper footing and balance at all times.
(4). NEVER STAND ON TOOL. Serious injury could occur if the tool is tipped or if the cutting tool is
accidentally contacted.
(5). NEVER LEAVE TOOL RUNNING UNATTENDED. TURN POWER OFF. Don't leave tool until it comes to
a complete stop.
(6). DRUGS, ALCOHOL, MEDICATION. Do not operate tool while under the influence of drug, alcohol or
any medication.
(7). MAKE SURE TOOL IS DISCONNECTED FROM POWER SUPPLY. While motor is being mounted,
connected or reconnected.
(8). ALWAYS keep hands and fingers away from the blade.
(9). STOP the machine before removing chips.
(10). SHUT- OFF power and clean the BAND SAW and work area before leaving the machine.
(11).DO NOT ALLOW hands or anything else. to encroach on the cutting zone while the machine is
in operation.
B. USE OF MACHINE:
(1). REMOVE ADJUSTING KEYS AND WRENCHES. Form habit of checking to see that keys and adjusting
wrenches are removed from tool before turning it "on".
(2). DON'T FORCE TOOL. It will do the job better and be safer at the rate for which it was designed.
(3). USE RIGHT TOOL. Don't force tool or attachment to do a job for which it was not designed.
(4). SECURE WORK. Use clamps or a vise to hold work when practical. It's safer than using your hand
frees both hands to operate tool.
(5). MAINTAIN TOOLS IN TOP CONDITION. Keep tools sharp and clean for best and safest performance.
Follow instructions for lubricating and changing accessories.
(6). USE RECOMMENDED ACCESSORIES. Consult the owner's manual for recommended accessories.
The use of improper accessories may cause hazards.

4
(7). AVOID ACCIDENTAL STARTING. Make sure switch is in “OFF” position before plugging in power
cord.
(8). DIRECTIONOF FEED. Feed work into a blade or cutter against the direction of rotation of the blade or
cutter only.
(9). ADJUST AND POSITION the blade guide arm before starting the cut.
(10). KEEP BLADE GUIDE ARM TIGHT, A loose blade guide arm will affect sawing accuracy.
(11). MAKE SURE blade speed is set correctly for material being cut.
(12). CHECK for proper blade size and type.
(13). STOP the machine before putting material in the vise.
(14). ALWAYS have stock firmly clamped in vise before starting cut.
(15). GROUNDALL TOOLS. If tool is equipped with three-prong plug, it should be plugged into a
three-hole electrical receptacle. If an adapter is used to accommodate atwoprong receptacle, the
adapter lug must be attached to a known ground. Never removed the third prong.
C. ADJUSTMENT :MAKE all adjustments with the power off. In order to obtain the machine, precision and
correct ways of adjustment while assembling, the user should read the detailed instruction in this
manual.
D. WORKING ENVIRONMENT:
(1). KEEP WORK AREA CLEAN. Cluttered areas and benches invite accidents.
(2). DON'T USE IN DANGEROUS ENVIRONMENT. Don't use power tools in damp or wet locations, or
expose them to rain. Keep working area well-lighted.
(3). KEEP CHILEREN AND VISITIORS AWAY. All children and visitors should be kept a safe distance
from work area.(4). DON’T install & use this machine in explosive, dangerous environment.
E. MAINTENANCE:(1). DISCONNECT machine from power source when making repairs.(2). CHECK
DAMAGED PARTS. Before further using of the tool, a guard or other part that is damaged should be
carefully checked to ensure that it will operate properly and perform its intended function. Check for
alignment of moving parts, binding of moving parts, breakage of parts, mounting, and any other
conditions that may affect its operation. A guard or other part that is damaged should be properly
repaired or replaced.
(3). DISCONNECT TOOLS before servicing and when changing accessories such as blades, bits, cutters,
etc.
(4). MAKE SURE that blade tension and blade tacking are properly adjusted.
(5). RE-CHECK blade tension after initial cut with a new blade.
(6). TO RPOLONG BLADE LIFE ALWAYS release blade tension at the end of each workday.
(7). CHECK COOLANT DAILY Low coolant level can cause foaming and high blade temperatures. Dirty
coolant can clog pump, cause crooked. Rust, low cutting rate and permanent blade failure. Dirty
coolant can cause the growth of bacteria with ensuing skin irritation.
(8). WHEN CUTTING MAGNESIUM NEVER use soluble oils or emulsions (oil-water mix) as water will
greatly intensify any accidental magnesium chip fire. See your industrial coolant supplier for specific
coolant recommendations when cutting magnesium.
(9). TO PRNMT corrosion of machined surfaces when a soluble on is used as coolant, pay particular
attention to wiping dry the surfaces where fluid accumulates and does not evaporate quickly, such as
between the machine bed and vise.
F. SPECTIFIED USAGE:
This machine is used only for general metals cutting within the range of cutting capacity.

5
G. NOISE:
A weighted sound pressure level : 80 dB.
H. SAFETY DEVICE:
Interlock switch on cutting area as soon as the cover of cutting area is open, machine will stop at once
witch the function of this switch. Do not remove this switch from machine for any reason, and check its
function frequently.
3. SPECIFICATION
Spindle Motor
1.8/1.5 KW , 2/4 P
Coolant Pump Motor
1/8HP
Hydraulic Motor
--
Saw Blade Speed
60Hz
30-95MPM ,, 98-312 FPM
Blade Size(mm)
27x0.9x3320
Dimension L x W x H
2245x850x1590 mm;
88.4” * 33.5” * 62.5”
Packing
N.W / G.W (kgs)
460 /500
Measurement
2184x825x1143 mm;
86” * 32.5” *45”
Sets per 20’ CTNR
14 sets
Cutting
Capacity
mm
○
□
X°
0°
300(11.8”)
330*200(13”*7.9”)
260(10.2”)
+ 45°
260(10.24”)
270*200(10.6*7.9”)
250(9.8”)
- 45°
200(7.9”)
200*260(7.9*10.2”)
180(7.1”)
-60°
180(7.1”)
170*170(6.7”*6.7”)
170(6.7”)
Noise level
80 db
4. FEARTURES
1. This machine is useful for cutting normal steel, steel pipe, and provides cutting angle at - 60°and
+45°by the swivel head.
2. A tooth selection label Ms provided on the machine for cutting reference.
3. 2-speed control gives convenient selection of speeds.
4. Hydraulic cylinder controls feeding volume and provides stable cutting.
5. Easy sliding the working table back and forth by loosing and fixing only two bolts. Swivel cutting
angle and working piece. When the working table and saw bow changing the cutting angle, the vise
and working piece will fix in the same position and easy for the operator to use.
6. Quick positioning vise for clamping all sizes of work piece.
7. Chip pan underneath the working table prevents coolant fluid leaking and keep floor dry.
8. Coolant for cutting , water : oil = 1:40 oil specification.

6
5. TRANSPORTATATION & INSTALLATION:
5-1. Unpacking
1. Transportation to desired location before unpacking, please use-lifting jack. (Fig. B)
2. Transportation after unpacking, please use heavy duty fiber belt to lift up the machine.
Fig. B
ALLWAYS KEEP PROPER FOOTING & BALANCE WHILE MOVING THIS MACHINE.
5-2. TRANSPORTATION OF MACHINE:
As this machine weights 490 kg (1078 lbs) it is recommended that the machine be transported with help
of lifting jack.
Transportation Recommendation:
1. Tighten all locks before operation.
2. Always keep proper footing & balance while moving this
machine, and only use a heavy duty of fiber belt to lift the
machine as per Fig. A.
3. TURN OFF the power before wiring & be sure machine is pr
operly grounded. Overload & circuit breaker are recommended
for safety wiring.
4. Tighten 4 bolts to base holes after machine is balanced.
5. Check carefully if the saw blade is running in counter-
clockwise direction if not, reverse the wiring per circuit diagram,
then repeat the running test.
6. Keep machine always out from sun, dust, wet, or raining area.
5-3. CLEAIG & LURICATING
(1) Your machine has been coated with a heavy grease to protect it in shipping. This coating should
be completely removed before operating the machine. Commercial degreaser, kerosene or
similar solvent may be used to remove the grease from the machine, but avoid getting solvent
on belts or other rubber parts.
(2) After cleaning, coat all bright work with a light lubricant. Lubricate all points in Fig 1. with a
medium consistency machine oil.
Fig. A

7
6. MINIMUM ROOM SPACE FOR MACHINE OPERATION
7. MAKE PROPER TOOTH SELECTION
For maximum cutting efficiency and lowest cost per
cut, it is important to select the blade with the right number
of teeth per inch (TPI) for the material being cut. The
material size and shape dictate tooth selection.
TOOTH
SELECTION
You need to consider:
The width of the cut - That is, the distance in the cut that
each tooth must travel from the point it enters the
work-piece until it leaves the work-piece, and
1.The shape of the work-piece.
⚫Squares, Rectangles, Flats (Symbol : ■)
Locate the width of cut on the chart. (Inches on the outer circle and millimeters on the inner
circle.) Select the tooth pitch on the ring marked with the square shape which aligns with the
width of cut.
EXAMPLE: 6" (150mm) square, use a 2/3 Vari-Tooth.
⚫Round Solids (Symbol : ●)
Locate the diameter of your work-piece on the chart. Select the tooth pitch on the ring
marked with the round shape which aligns with the size of stock you are cutting.
EXAMPLE: 4" (100mm) round, use a 3/4 Vari-Tooth.
⚫Tubing, Pipe, Structural ( Symbol : O H ^ )
Determine the average width of cut by dividing the area of the work-piece by the distance the
1600mm
900mm
2250mm

8
saw blade must travel to finish the cut. Locate the average width of cut on the chart. Select
the tooth Ditch on the ring marked with the tubing and structural shape, which aligns with the
average width you are cutting.
EXAMPLE: 4"(100mm) outside diameter, 3"(75mm) inside diameter tubing.
4"(100mm) OD =12.5 sq.ln. (79cm2)
3"(75 mm ) ID = 7.0 sq.ln. (44cm2)
Area = 5.5 sq.ln. (35cm2)
5.5 sq.ln. (35cm2) / 4" (100mm) distance =1.38(35mm) average width
1.38" (35mm), use a 4/6 Vari-Tooth
NOTE: The band speed and cutting rate recommendations presented on this chart are
approximations and are to be used as a starting point for most applications. For exact sawing
parameters' consult your saw blade supplier.
8. BI-METAL SPEEDS AND FEEDS
These figures are a guide to cutting 4"(100mm) material (with a 314 Vari-Tooth) when using a cutting fluid.
Increase Band Speed: 15% When cutting 1/4"(6.4mm) material (l0/l4 Vari-Tooth)
12% When cutting 3/4"(19 mm) material (6/10 Vari-Tooth)
10% When cutting 1-1/4"(32 mm) material(5/8 Vari-Tooth)
5% When cutting 2-1/2" (64 mm) material(4/6 Vari-Tooth)
Decrease Band Speed: 12% When cutting 8"(200mm) material(2/3 Vari-Tooth)
MATERIAL
ALLOY
ASTM NO.
BAND SPEED
FT./MIN
M/MIN
Copper
Alloy
173,932
314
96
330,365
284
87
623,624
264
81
230,260,272
244
74
280,264,632,655
244
74
101,102,110,122,172
234
71
1751,182,220,510
234
71
625,706,715,934
234
71
630
229
70
811
214
65
Carbon
Steel
1117
339
103
1137
289
88
1141,1144
279
85
1141 HI STRESS
279
85
1030
329
100
Carbon
Steel
1008,1015,1020,1025
319
97
1035
309
94
1018,1021,1022
299
91

9
1026,1513
299
91
A36(SHAPES),1040
269
82
1042,1541
249
76
1044,1045
219
67
1060
199
61
1095
184
56
Ni-Cr-Mo
Alloy Steel
8615,8620,8622
239
73
4340,E4340,8630
219
67
8640
199
61
E9310
174
53
Tool Steel
A-6
199
61
A-2
179
55
A-10
159
49
D-2
90
27
H-11,H-12,H-13
189
58
Stainless
Steel
420
189
58
430
149
46
410,502
140
43
414
115
35
431
95
29
440C
80
24
304,324
120
36
304L
115
35
347
110
33
316,316L
100
30
416
189
58
TELLTALE CHIPS
Chips are the best indicators of correct feed force. Monitor chip
information and adjust feed accordingly.
Thin or powdered chips –increase feed rate or reduce band speed.
Burned heavy chips –reduce feed rate and/or band speed.
Curly silvery and warm chips –optimum feed rate and band speed.

10
D
T
M
N
F
A
B
E
C
H
9. USE OF MAIN MACHINE PARTS
9-1.POWER SYSTEM AND CONTROL PANEL
The electrical rating of your band saw is either with 230 or 400 volt-3 phase, magnetic control.
Before connecting your machine to an electrical power system, be sure the motor shaft is running in
the correct direction.
We recommend that 1.5mm² fused with a 10 amp, dual element, time lag fuse, to be used to supply
power to all machines regardless of their electrical rating.
Refer to the electrical wiring diagram supplied with your machine for instructions on how to connect
saw to power source. Power must be cut off when wheel cover is opened or during repairing.
Please check the moving direction of the blade. If the blade is moving in the wrong direction,
please re-connect the wire.
9-2-1.STARTING AND STOPPING MACHINE
1, Turn the main power switch (H) to ON, the “stand-by” light
on (A), power is ready to operate.
2, Push the push button (B) for starting the hydraulic motor.
3, Select the operation mode switch (D). Select Manual or
Automatic mode.
3-1, Select the automatic mode, and push the cutting
button (T), the system will run a full cycle of
automatic clamp and cutting (before pushing the
cutting button (T), the bow and vise can be operated
manually for the work piece to be positioned
precisely and clamped firmly).
3-2, Select the manual mode, the band saw will be
running, and the bow and vise can be operated manually (this
mode is suitable for testing purpose after blade replacement).
4, When the E-Stop is pushed, the machine will stop running including
the blade and hydraulic unit. To restart the machine, release
the E-Stop button clockwise.
5, Rotation speed control knob (C) to control high or low speed
6, Vise control switch (M) for clamp and release
7, Bow control switch (N) for bow goes up and down
8, Bow hydraulic control (F) for bow goes up and down speed

11
L
S
H
W
H
R
W
H
9-2-2. OPERATION OF AUTOMATIC CUTTING AND
WORKPIECE SCALE
1, Operation Mode (D). When you select the automatic
mode, and push the cutting button (T), the system will
run a full cycle of automatic clamp and cutting.
2, Automatic cutting:
A1=> Push the automatic cycle button (T)
A2=> Vise holds the workpiece, and then the blade
start running
A3=> The bow descends to the top of the workpiece
rapidly. When the blade touch the workpiece, the
descending speed slow down. The descending speed
can be adjusted on control knob (F)
A4=> Start cutting, the bow descending speed can be
adjusted.
A5=> When the cutting is finished, the bow limit switch
will be actuated and the bow will raise automatically.
A6=> The bow will raise until the workpiece scale
leaving the workpiece for 1 second and then stop for the next cutting cycle.
** When the automatic cycle is finished.
1, If the vise control switch (M) is ON, the vise will open automatically for releasing the workpiece.
2, If the vise control switch (M) is OFF, the vise will not release the workpiece until you turn the (M)
switch ON.
Notice:
1, Before start blade running, operator has to ensure the blade is assembled appropriately, the blade
cover is closed, and the emergency bottom is on. After the confirmation, the machine can be
operated only.
2, After the cutting is completed, make sure the main power is cut-off for safety.
Notice: Laser light is for cutting reference only, operator can turn it off during the cutting for longer
life of the laser light.
9-3.ADJUSTING DOWNWARD TRAVEL OF SAW ARM
Saw Bow down side limited switch adjustment:
If operator wants to adjust the lowest cutting position,
can use the limited screw (A) to adjust it. If the limited
screw has been adjusted, please ensure the position of
limited switch (L) is also adjusted, that will help the blade
stop running after the cutting is completed.

12
C
A
B
A
B
C
9-4. BOW DOWNWARD WEIGHT ADJUSTMENT
In normal situation, when the blade is running, hydraulic valve is
on, the bow is going down and cutting and working piece, the
bow will maintain 12-15 kgs downward weight to cut the working
piece. Different of material of working piece needs different
weight of bow to do the cutting. Operator can adjust the Nuts
and screws (B) to increase (clock direction) or decrease
(anti-clock direction) the torsibility of the spring.
9-5. VISE POSITION ADJUSTMENT
Vise position movement: (LEFT, RIGHT)
The vise and bow is designed as swivel type. Vise position
is designed to move to left and right. Before the
movement, turn handle (B) to anti-clock direction to
release the lock, the vise can be moved to the correct
position. And lock it with turning the handle(B) in clock
direction.
NOTE: Please pay attention that the vise position and
bow downward position should not be touched.
Vise position movement: (FORWARD, BACKWARD)
The vise clamping is designed as fast movement. Press handle (A) and operator can move the vise
easily forward and backward. As the vise in the right position, release handle (A), and turn vise handle
(C), the screw bar will lock the vise at forward and backward movement.
9-6. CHANGE CUTTING ANGLE
When you proceed the angle cutting, follow the steps
below
1, Loosen the position plate, turn the screw wheel (B)
counter clockwise to then end. Make the position plate
away from the slot hole of angle plate.
2, Loosen the angle clamp board. Pull the handle (C)
upward.
3, Rotate the bow and base simultaneously. Look at the
angle of pointer (A) until the angle you need.
4, On the angle plate，there is a position slot on every 15
degree and it applied with position plate (B)
5, If the angle is not on every 15 degree, ignore the position plate (B), and use the angle plate with the
handle (C) directly.
CAUTION: Before rotating the bow angle, be sure to loosen the position plate (B) and angle plate (C).
This is to prevent from any improper use and cause the damage of the turning mechanism or bow
mechanism.
B

13
FIG.
(A)
B
A
D
C
9-7. BLADE WHEEL POSITION ADJUSTMENT
The blade and wheel of RF-420VAA is designed as adjustable.
The normal position is same as FIG. (A), the gap between blade
and wheel is around 1 mm maximum.
If the gap is less than 1mm, the machine will have huge noise
during the operation, the life of blade is shorter.
If the gap is bigger than 1mm, operator has potential and fatal
danger due to the loosen blade.
Main Wheel Adjustment:
1. Cut off the power.
2. Turn the tension handle to loose the blade.
3. Release the 8 screws (A) on the bracket, take off 4 of
them, and load the 4 screws into the 4 holes (B) on the
bearing bracket, fasten the 4 screws and make bearing
bracket loosen. (Be attention that do not loose the
screw too much and that will cause the wheel
dropping.), move the wheel to the right position and
fastening the 8 screws.
Rear Wheel Adjustment:
1. Cut off the power.
2. Turn the tension handle to loose the blade.
3. Release the position screw (C). (Be attention that do
not loose the screw too much and that will cause the
wheel dropping.), move the wheel (D) to the right
position and fastening the screw (C).
9-8. BRUSH POSITION ADJUSTMENT
If the brush has abrasion, the position needs to be adjusted
again.
Loose the 2 screws (A), move the brush bracket upward, and
make sure part of the brush’s teeth is fixed. And then fasten
the screw (A).
NOTE: Ensure the brush and blade both running at the same
time. If not, please adjust again.
A

14
A
A
9-9. ADJUSTING CUTTING WIDTH
First loosen handle screw (A).
Move the left blade guide bar to the suitable position.
Then tighten handle screw (A).
9-10. PIVOT
Occasionally lubricate the pivot using waterproof
grease at the fitting (A).
9-11. HOW TO USING CLEAN EQUIPMENT
After finished cutting, you can clean the chip by using
clean equipment.
NOTICE : Please using the suitable volume of coolant fluid for
cleaning. Cleaning the floor immediately when the coolant fluid
leaking on the floor.
*** Always keep the floor dry to prevent slip or any accident.
10. MAINTAINING
That's easier to keep machine in good condition or best performance by means of maintaining it at any
time than remedy it after it is out of order.
(1) Daily Maintenance (by operator)
(a) Fill the lubricant before starting machine everyday.
(b) If the temperature of spindle caused over-heating or strange noise, stop machine immediately
to cheek it for keeping accurate performance.
(c) Keep work area clean; release vise, cutter, work-piece from table; switch off power source;
take chip or dust away from machine and follow instructions lubrication or coating rust proof oil
before leaving.
(d) Please confirm no breaking in give bedspring or damaged cylinder tile road with leaking
problems before use.
(2) Weekly Maintenance
(a) Clean and coat the cross leading screw with oil.
(b) Check to see if sliding surface and turning parts lack of lubricant. If tile lubricant is insufficient,
fill it.
(3) Monthly Maintenance
(a) Check if the fixed portion has been loose.
(b) Lubricate bearing worm, and worm shaft to avoid the wearing.
(4) Yearly Maintenance
(a) Adjust table to horizontal position for maintenance of accuracy.

15
(b) Check electric cord, plugs, switch, bedspring, Cylinder Assembly at least once a year to avoid
loosening or wearing.
11. OPERATING AND ADJUSTING VISE
Right picture is the Hydraulic Vise set. The hydraulic (B)
movement is: turning the handle(A) and make the vise(C) to clamp
working object and push the bottom of Hydraulic Vise Clamp. The
hydraulic device will move the vise and press the working object,
make the working object being clamped tied. The object will not
be moving during the cutting and cause any danger. After cutting
completed, push the release bottom and take the object from the
working table.
12. SHUT-OFF LIMIT SWITCH HOLDER
An automatic shut-off limit switch is provided to stop the motor
when the cut is completed. The limit switch (D) is controlled by
button (E), which contacts the (F) for shutting off the motor and
coolant system.
13. HOW TO OPERATE HYDRAULIC UNIT
1. This hydraulic unit is using (Esso, H15) oil. Change first oil after
50 hours use. Then change oil every 6 months after. Run the
hydraulic unit for at least 10 minutes before changing oil, this
will let the oil flow smoother and easier to change.
2.Open the oil outpour door with tool when changing the oil. Let
the used oil out completely. Close the outpour door firmly,
open the input door (A) and pour in the oil by 3 liters (will be
80%full).
If in long time use, please watch out the oil temperature to be
60º C maximum.

16
14. TROUBLE SHOOTING
Symptom
Possible Cause(s)
Corrective Action
Machine can not be started
1. Power is not plugged; the power light on
control panel is not on.
2.Motor can not be started; power was cut
by limit switch.
3. Operation button can not be normally
operated.
1. Check the motor specification;
connect the power with correct
power supply. Make sure the
power light in on.
2. Make sure the cover is in correct
position.
3.Push the emergency button;
return it to original position. Then
release the emergency button.
Excessive Blade
Breakag
1. Materials loosen in vise.
2. Incorrect speed or feed
3.Blade teeth spacing too large
1. Material too coarse
5. Incorrect blade tension
6.Teeth in contact with material before
saw is started
7. Blade rubs on wheel flange
8. Miss-aligned guide bearings
9. Blade too thick
10 Cracking at weld
1. Clamp work securely
2. Adjust speed or feed
3. Replace with a small teeth
spacing blade
4. Use a blade of slow speed and
small teeth spacing
5. Adjust to where blade just
does not slip on wheel
6. Place blade in contact with
work after motor is starred
7. Adjust wheel alignment
8. Adjust guide bearings
9. Use thinner blade
10. Weld again, beware the welding
skill.
Premature Blade Dulling
1. Teeth too coarse
2. Too much speed
3. Inadequate feed pressure
4.Hard spots or scale on material
5. Work hardening of material.
6.Blade twist
7. Insufficient blade
8. Blade slide
1. Use finer teeth
2. Decrease speed
3. Decrease spring tension on side
of saw
4. Reduce speed, increase feed
pressure
5. Increase feed pressure by
reducing spring tension
6. Replace with a new blade, and
adjust blade tension
7. Tighten blade tension
adjustable knob
8. Tighten blade tension
Unusual Wear on
Side/Back of Blade
1. Blade guides worn.
2.Blade guide bearings not adjust properly
3.Blade guide bearing bracket is loose
1. Replace.
2.Adjust as per operators manual
3.Tighten.
Teeth Ripping from
Blade.
1. Tooth too coarse for work
2. Too heavy pressure; too slow speed.
3. Vibrating work-piece.
4. Gullets loading
1. Use finer tooth blade.
2. Decrease pressure, increase
speed
3. Clamp work piece securely

17
4. Use coarser tooth blade or brush
to remove chips.
Motor running too hot
1. Blade tension too high.
2. Drive belt tension too high.
3. Blade is too coarse for work
4. Blade is too fine for work
5. Gears aligned improperly
6. Gears need lubrication
7. Cut is binding blade
1. Reduce tension on blade.
2. Reduce tension on drive belt.
3. Use finer blade.
4. Use coarse blade.
5. Adjust gears so that worm is in
center of gear.
6. Check oil path.
7. Decrease reed anti speed
Bad Cuts (Crooked)
1. Feed pressure too great.
2. Guide bearings not adjusted properly
3. Inadequate blade tension.
4. Dull blade.
5. Speed incorrect.
6. Blade guides spaced out too much
7. Blade guide assembly loose
8. Blade truck too far away from wheel
flanges
1. Reduce pressure by increasing
spring tension on side of saw
2. Adjust guide bearing, the
clearance can not greater than
0.001.
3. Increase blade tension by adjust
blade tension
4. Replace blade
5. Adjust speed
6. Adjust guide space.
7. Tighten
8. Re-track blade according to
operating instructions.
Bad Cuts (Rough)
1. Too much speed or feed
2. Blade is too coarse
3. Blade tension loose
1. Decrease speed or feed.
2. Replace with finer blade.
3. Adjust blade tension.
Blade is twisting
1. Cut is binding blade.
2. Too much blade tension
1. Decrease reed pressure.
2. Decrease blade tension.

18
15. CIRCUIT DIAGRAM

19