Mega Machine BS-450HAS User manual

Automatic BANDSAWS
BS-450HAS
Full Stroke
INSTRUCTION MANUAL
MEGA MACHINE CO., LTD.
DOC NO：BS450HAS 全行程-100.U
CTRL NO：06
UPDATE：2009/6/17
DOC VER：A1

FOREWORD
We hope that the owner of this automatic circular sawing machine will
have years of trouble-free service. The machine has been built
to the highest standards to enable fast accurate cutting to be obtained.
In order that the best results can be achieved from your MEGA circular sawing
Machine, we would ask all operators and maintenance engineers to READ
THIS MANUAL CAREFULLY BEFORE STARTING THE MACHINE.
The manual contains full instructions on installation, operation, lubrication,
maintenance and trouble-shooting.
As MEGA MACHINE COMPANY LIMITED is constantly improving the
design of its machines, there may be some instance where this book differs
somewhat from the machine with which you are concerned. So, always
quote the Serial Number of your machine, when ordering spare parts
or in correspondence relating to the machine.
MODEL : BS450HAS
Serial Number :
Request for service and spare parts should be made to:
ADDRESS: NO. 180, INDUSTRIAL ROAD, TAI-PING CITY, 41107 TAICHUNG,
TAIWAN R. O. C.
E-MAIL: [email protected]; m[email protected]old.net.tw
URL: www.bandsaw.com.tw
TEL: [phone](PRES.) FAX:[phone]

TABLE OF CONTENTS
Item Unit Page
1 Introductory Illustrations 1-1
1.1 Principal parts 1-1
2 Specifications 2-1
2.1 Specifications 2-1
2.2 Standard Accessories 2-1
3 Installation 3-1
3.1 Moving and lifting 3-1
3.2 Foundation layout and Set-up 3-2
3.2.1 Foundation 3-2
3.2.2 Leveling 3-3
3.2.3 Cleaning and oiling 3-3
3.2.4 Power Source Connection 3-4
4 Operation
4.1 Control Panel 4-1
4.2 Operating preparation 4-3
4.3 Manual Operation 4-4
4.4 Automatic operation 4-5
4.5 Special Operation 4-5
4.6 Break -In Operation 4-6
Addition 1 Amplifying Valve 4-7
5 Maintenance 5-1
5.1 Hydraulic Circuit 5-1
5.2 Oiling and Lubrication 5-2
5.3 Others 5-3
6 Trouble Shooting Guide
6.1 Sawing Problems and Solution 6-1
6.2 Minor Operating Troubles and Remedies 6-2
6.3 Error information 6-2
7 Reference Charts
7.1 Standard cutting Chart 7-1
7.2 Standard cutting Chart 7-2
7.3 Standard cutting Chart 7-3

1. INTRODUCTORY ILLUSTRATIONS
1.1 Principal Parts
1 Coolant Pump 10 Hydraulic Blade Tension Set
2 Main Motor 11 Saw Frame
3 Pulley Cover 12 Guide Arm
4 Electric Control Box 13 Guide Arms Slide
5 Stock Tray 14 Quick Approach Rod
6 Chip Conveyance 15 Feed Assembly
7 Lift Cylinder 16 Slide Shaft
8 Water Trough 17 Feed Cylinder
9 Oil Tank 18 Vise
1 - 1

2 SPECIFICATIONS
2.1 SPECIFICATIONS
MODEL
SPECIFICATIONS BS-450HAS
(Mm) φ460 □460W*407H
Cutting Capacity (In) φ18” □18”*16”H
(Mm) 360W*255H
Bundle Cutting (In) 14“W*10”H
(Mm) 38W*1.3t *4880L
Blade Size (In) 1 1/2”W *0.05”t *192”L
(M/Min) 25,32,42,55,70,80 OPTIONAL 20 – 80
Blade Speed (F/Min) 82,105,138,180,230,260 OPTIONAL 65 – 260
(KW) Blade-5.6 HYD-1.5 Coolant-0.09
Motor Output (HP) Blade-7.5 HYD-2 Coolant- 1/8
(Mm) 2682L*2255W*1980H
Shipping Volume (Ft) 8.8L*7.4W*6.5H
KG 3100 / 3500
Weight Net/Gross Lb 6820 / 7700
Specifications subject to change without notice for improvement and modification.
2.2 STANDARD ACCESSORIES
1. Tools with tool box .............………….……..……....... 1 set
2. 7 ft.(2M) long roller table ...…………………..…......... 1 set
3. Band-cleaning wire brush ...…………………..….......... 1 pieces
4. Band saw blade .................…………………..……....... 1 piece
5. Instruction manual .............………………….……........ 1 copy
2 - 1

3. INSTALLATION :
3.1 Moving and Lifting :
Unpack your machine carefully , and use a crane or forklift to set it in position.
If a crane is used to lift the machine attach the lifting cable carefully to the machine as shown in
the fig 2. If forklift is used then fig 3.
Sufficient space should be left around the machine to allow safe handling of materials , and
inspection and maintenance operation. Should there be other machinery causing vibration or dust
near your machine precautions must be taken to keep your machine free of vibration and dust.
(1) Use Crane :
Fig 2
(2) Use Forklift :
Fig 3
3 – 1

3.2 Foundation layout and set-up:
3.2.1 Foundation:
The foundation should be constructed of reinforced concrete and must be level and flat. After
the proper leveling position has been obtained , anchor the machine with anchor bolts.
The position of anchor bolts and floor dimensions are shown in fig 4:
□Contact portion with floor
○Position of anchor bolts
Fig. 4
※All leveling bolts should support the weight of the machine evenly .
3 – 2

3.2.2 Leveling :
The production accuracy of all precision machinery depends on the accuracy which the machine
is installed . Manufacturing tolerance of the machine can only be guaranteed if the machine is firmly
and properly installed . Once the machine is lowered on the prepared foundation . Machinist levels
should be used alternately on the vice slide plates and the work feed table , and adjust the left-and-
right and fore-and-aft level of the machine with leveling bolt .
Leveling as fig 5 below :
FIG 5
The fore-and-aft level should be adjusted so that the level of the rear end is approximately 10 mm
(3/8" - 1/2") higher than the level of the front end , to provide proper return of the cutting fluid , and
easy operation of car feeding .
The left-and-right level should be adjusted so that the level of the left end is approximately 3 mm
(1/8") higher than the level of the right end , to provide proper return of the cutting fluid , After the
proper leveling position has been obtained anchor the machine with anchor bolts .
Caution : All leveling bolts should support the weight of the machine evenly .
3.2.3 Cleaning and oiling :
After the machine has been placed in position , thoroughly remove its rust preventive coating using
a suitable cleaning solvent and then apply a coat of machine oil . To clean the machine , Kerosene is
preferable to gasoline . It does not evaporate and level dried slushy compound on finished surfaces.
Rags are better than waste as they leave no lint or strings. The machine as received by you. has been
completely drained of all oil. Before any attempt is made to run it .... Before any motor connections
are made .... every detail of the following oiling instruction must be complied with. Refer to the oiling
chart in chapter 7.
Especially , don't forget to fill up the cutting fluid mixture. Usually , the ratio of cutting fluid to
Water should be 1:30 - 1:50. Check the sight gauge to ascertain the fluid level in the tank every day.
Transmission gear box, bar feed gear box, hydraulic oil tank should to topped up monthly. Oil
levels should be strictly observed, for it is of primary importance for proper operation and long lift .
3 - 3

3.2.4 Power Source Connection :
A. Power Source - This machine is equipped with 7.5HP main motor and 2HP hydraulic motor ,
and 1/8HP coolant motor. Connect the power supply cable to the circuit breaker(N.F.B.)
terminals. The power supply to your machine should agree with the wring voltage that is
indicated on the label attached to the electrical enclosure and main motor.
B. Earth - Be sure to connect the earth cable to the earth terminal.
C. Starting - After making the necessary wiring connections, turn the power switch on the control
panel clockwise to turn power on, depress the vice limit switch (if necessary, e.g. if there is no
stock bar clamped in the vice) and push the button to see if the saw head moves upward. If the
saw head does not rise , the hydraulic pump motor is rotating in the wrong direction. If the motor
runs in the wrong direction, turn off the power switch and disconnect the power supply cable,
Then interchange any two phase connections.
3 - 4

4. OPERATION (Type 1)
4.1 Control Panel
(1) PNC Control Panel
Cutting Piece Counter – This counter is used to preset
the number of cuts required on the automatic operation.
When the counter reaches the preset number, the machine
stops automatically . To activate the counter, preset the
counter switch with number at least “1”.
Clear – This key is used to clear the counted number cut
already and to have new number input available.
Multiple stroke feed counter – This counter makes it
possible to multiply the number of index cycles when off-cut pieces longer than 500mm are required.
Maximum 9-time stroke can be set.
Blade speed LED-Display -- This blade speed tachometer indicates how fast the saw blade is running in
meter per minute by LED display.
To see digital cut length counter
L (length req.) + K (blade thickness)
S = N (multiple feed times) - K
EXAMPLE:
1200 +1.5
S = 3 -1.5 = 400.5-1.5 = 399
L = Required cut length N = Multiple feeding times
K = Cutting loss ( Blade thickness ) S = Digital counter length setting
Total bar feed needed = length + blade thickness
Single step feed = length + K
Multiple step feed only needs 1 allowance for blade
Thickness ...hence…L + K divided by number of steps
Then less K = Digital counter setting length…. 4 - 1

(2) PILOT LAMP -- This light will comes on when the power supply is on.
(3) EMERGENCY STOP -- This switch is used for emergency case to stop the machine only.
Turn this switch clockwise makes power source on. When this switch is pressed, all machine's
operation stop immediately.
(4) HYDRAULIC "ON" BUTTON -- When this button is depressed, the hydraulic pump motor operates.
(5) POWER SWITCH OFF -- This switch is used for turning off the power by depressing it.
(6) FRONT VISE TO CONFIRM SWITCH – The front vise clamp the workpiece when turn switch
NO.(8) right and press button NO.(6) 1.5sec in the same time. Then the front vise hold the workpiece
after the lamp NO.(6A) light.
(7) AUTO - MANUAL SELECTOR -- For continuous cutting , turn this selector to left "AUTO".
To individually operate each function, turn this switch to right "manual".
(8) FRONT VISE SWITCH -- The switch control the front vise jaws in manual mode, The front vise
clamp when turn the switch to right. Then if release the switch, the switch come back to the middle
position, the vise doesn’t hold the workpiece. If operator would like to hold the workpiece, he would
follow the (6) illustration.
The front vise open little by little if the guide arm is under the front vise when the switch turn to left.
And the front vise open continuously if the guide arm is above the front vise. At last, if release the
switch, the switch come back to the middle position.
(9) BLADE DRIVE BUTTON -- When this button is pressed, both the saw blade motor and the cutting
fluid pump operate and saw head begins to descend. The saw head descends quickly until the feeler of
the quick approach device comes into contact with the workpiece and thereafter, it will descend at the
designated cutting speed.
(10) REAR VISE SWITCH -- This switch control the rear vise jaws in manual mode, switched to the left
makes the front vise open. and switched to the right makes the front vise clamp.
(11) MANUAL FEED FORWARD BUTTON --When this button is pressed the workpiece moves
forward. The workpiece stops advancing when the button is released.
NOTE: Turn (8) VISE SWITCH right position before depress switch (9) BLADE DRIVE to cutting.
(12) MANUAL FEED BACKWARD BUTTON --When this button is pressed the workpiece moves
backward. The workpiece stops moving when the button is released.
NOTE: Don't depress (11) and (12) two switches, if the workpiece are clamped by both front and
rear vises in the meantime.
(13) QUICK APPROACH BUTTON -- While this button is pressed, the saw head descends quickly.
This button is used to cause the saw blade to approach the work quickly when the saw blade is at a
distance from the workpiece. When the feeler of the quick approach device comes into contact with
the work, the saw head stops descending at that position even this button is still pressed.
(14) SAW FRAME RAISE BUTTON -- When this button is pressed, the saw blade motor stops and the
saw head ascends. The saw head stops ascending at that position when the button is released.
(15) WORK BEAM LIGHT SWITCH -- When this switch is set at "1" the work light illuminates.
(16) AUTO CHIP CONVEYOR & COOLANT SWITCH -- When this switch is set at "1" the cutting
fluid pump operates and cutting fluid will be injected even though the saw blade motor is not in
operation. Use this switch when removing saw chips with the cutting fluid (without the blade running).
(17). INVERTER CONTROL KNOB (OPTIONAL)-- Please turn left for being slow speed wanted, turn
right for being fast speed wanted. Please refer to (JPS) Inverter Instruction Manual or Please refer to
(TOSHIBA) Inverter Instruction Manual
(18) FEED RATE CONTROL KNOB -- When this control dial is turned clockwise the feed rate of
the cutting increases, when it is turned counter clockwise, the feed rate decreases.
(19) CUTTING PRESSURE CONTROL KNOB -- When this control dial is turned clockwise the
cutting pressure increases, when it is turned count clockwise, the cutting pressure decreases.
4 – 2

4. OPERATION (Type 2)
4.1 Control Panel
(1) PNC Control Panel
Cutting Piece Counter – This counter is used to preset the
number of cuts required on the automatic operation.
When the counter reaches the preset number, the machine
stops automatically . To activate the counter, preset the
counter switch with number at least “1”.
Clear – This key is used to clear the counted number cut
already and to have new number input available.
Multiple stroke feed counter – This counter makes it
possible to multiply the number of index cycles when off-cut pieces longer than 500mm are required.
Maximum 9-time stroke can be set.
Blade speed LED-Display -- This blade speed tachometer indicates how fast the saw blade is running in
meter per minute by LED display.
To see digital cut length counter
L (length req.) + K (blade thickness)
S = N (multiple feed times) - K
EXAMPLE:
1200 +1.5
S = 3 -1.5 = 400.5-1.5 = 399
L = Required cut length N = Multiple feeding times
K = Cutting loss ( Blade thickness ) S = Digital counter length setting
Total bar feed needed = length + blade thickness
Single step feed = length + K
Multiple step feed only needs 1 allowance for blade
Thickness ...hence…L + K divided by number of steps
Then less K = Digital counter setting length…. 4 - 1

(2) PILOT LAMP -- This light will comes on when the power supply is on.
(3) EMERGENCY STOP -- This switch is used for emergency case to stop the machine only.
Turn this switch clockwise makes power source on. When this switch is pressed, all machine's operation
stop immediately.
(4) HYDRAULIC "ON" BUTTON -- When this button is depressed, the hydraulic pump motor operates.
(5) POWER SWITCH OFF -- This switch is used for turning off the power by depressing it.
(6) FRONT VISE TO CONFIRM SWITCH – The front vise clamp the workpiece when turn switch
NO.(8) right and press button NO.(6) 1.5sec in the same time. Then the front vise hold the workpiece
after the lamp NO.(6A) light.
(7) AUTO - MANUAL SELECTOR -- For continuous cutting , turn this selector to left "AUTO".
To individually operate each function, turn this switch to right "manual".
(8) FRONT VISE SWITCH -- The switch control the front vise jaws in manual mode, The front vise
clamp when turn the switch to right. Then if release the switch, the switch come back to the middle
position, the vise doesn’t hold the workpiece. If operator would like to hold the workpiece, he would
follow the (6) illustration.
The front vise open little by little if the guide arm is under the front vise when the switch turn to left.
And the front vise open continuously if the guide arm is above the front vise. At last, if release the
switch, the switch come back to the middle position.
(9) BLADE DRIVE BUTTON -- When this button is pressed, both the saw blade motor and the cutting
fluid pump operate and saw head begins to descend. The saw head descends quickly until the feeler of
the quick approach device comes into contact with the workpiece and thereafter, it will descend at the
designated cutting speed.
(10) REAR VISE SWITCH -- This switch control the rear vise jaws in manual mode, switched to the left
makes the front vise open. and switched to the right makes the front vise clamp.
(11) MANUAL FEED FORWARD BUTTON --When this button is pressed the workpiece moves
forward. The workpiece stops advancing when the button is released.
NOTE: Turn (8) VISE SWITCH right position before depress switch (9) BLADE DRIVE to cutting.
(12) MANUAL FEED BACKWARD BUTTON --When this button is pressed the workpiece moves
backward. The workpiece stops moving when the button is released.
NOTE: Don't depress (11) and (12) two switches, if the workpiece are clamped by both front and
rear vises in the meantime.
(13) QUICK APPROACH BUTTON -- While this button is pressed, the saw head descends quickly.
This button is used to cause the saw blade to approach the work quickly when the saw blade is at a
distance from the workpiece. When the feeler of the quick approach device comes into contact with
the work, the saw head stops descending at that position even this button is still pressed.
(14) SAW FRAME RAISE BUTTON -- When this button is pressed, the saw blade motor stops and the
saw head ascends. The saw head stops ascending at that position when the button is released.
(15) WORK BEAM LIGHT SWITCH -- When this switch is set at "1" the work light illuminates.
(16) AUTO CHIP CONVEYOR & COOLANT SWITCH -- When this switch is set at "1" the cutting
fluid pump operates and cutting fluid will be injected even though the saw blade motor is not in
operation. Use this switch when removing saw chips with the cutting fluid (without the blade running).
(17) Feed Rate Control -- When the control dial is turned counter clockwise, the feed rate of the saw
blade increases, when it is turned clockwise, the feed rate depresses.
4 -2

4.2 Operating Preparation
(1) Choose Proper Saw Blade :
Select the saw blade best suited to the workpiece to be cut, Size and shape of the workpiece , and type
of material should all be considered when selecting the saw blade to be used . There is a reference chart in
chapter 9 which can help you to select the right saw blade and cutting conditions .
(2) Unpack The Saw Blade :
Usually the saw blade is packed in 3 circle ,unpack it one circle first grip the part to release another 2
circles gradually , tear off the saw-cap protective shield , inspect the blade teeth , make sure that the
cutting edge of the blade teeth point to the right . If they point to the left the blade should be turned over.
(3) Place the saw blade onto both the drive and driven wheels-----
a. Turn the hydraulic blade tension handle clockwise , to fully loosen the driven wheel .
b. Open both the drive and driven wheel covers , place the saw blade onto both the drive and
driven wheels. Check the cutting edge of the saw blade , to ensure that it point to the right.
c. Insert the saw blade into both the left and right blade guides so that the back edge of the saw
blade touches the back-up roller of each guide .
d. The back edge of the saw blade should make contact with the flange of the drive and driven
wheel , turn count - clockwise the hydraulic blade tension handle to tighten the saw blade ,
Then the blade is properly tensioned .
e. Don't forget to tighten the insert adjusting screw .
(4) WORKPIECE CLAMPING :
a. Raise the saw frame , open the vice , place the workpiece on the roller table .
b. Gently push the workpiece into the roller-feed vice, taking care not hit the feed rollers.
c. Clamp the workpiece in vice.
(5) ADJUST THE BLADE GUIDE ARMS :
Properly position the blade guide arms according to the diameter (or the width) of the workpiece to be cut.
a. loosen the insert adjusting screw.
b. loosen the lock lever of the blade guide arm, and manually move the blade guide arm to suit the width of
material using the scale provided.
c. After adjusting the blade guide arm position ,tighten the lock lever.
d. Finger tighten the insert adjusting screw.
4 - 3

(6) ADJUST THE POSITION OF THE WIRE BRUSH :
a. loosen the lock lever of the wire brush case.
b. Manually move the wire brush case so that wire brush just contacts the cutting edge of the saw blade.
c. Tighten the lock lever.
(7) ADJUST THE FEED RATE :
Select suitable feed rate for the workpiece to be cut. This varies according to the size and shape of
the workpiece, type of material , and what type of saw blade is being used. As a guide hard aterias ,
wide workpiece or structural sections and tubing have to be cut at a slower rate that mild steel bar.
As concerns the saw blade , high speed steel is better than carbon steel, and bi -metal alloy is
better than high speed steel. Roughly the ratio of feed speeds could be 1:2:3
(8) CUTTING LENGTH PRESET :
To preset the length of the workpiece to be cut ,use the precise cutting length counter which is at
front leftside of the machine.
(a) Turn the handle wheel and watch the counter to the length you want to cut. The calibration
is 0.10 mm. for example: 400.1 mm
(b) Tighten the lock screw.
(9) SELECT THE SAW BLADE SPEED :
There are 6 speeds provided : 25, 32, 42, 55, 70, 80 M/min ( 82, 105, 138, 230, 260 F/min)
If a optional variable speed drive is equipped the speed to be 20 to 80 M/Min ( 65 to 260 F/min)
steplessly.
4.3 MANUAL OPERATION :
Place the workpiece to be cut on the work table , decide how long you want the off-cut , and carry out
all the procedures as described above in [4-2] Operating Preparation.
(1) Depress the RAISE button to lift the saw frame until the cutting edge of the saw blade clears the
workpiece by 1/2 to 3/4 inch.
(2) Turn the AUTO-MANUAL selector to manual.
(3) Clamp the workpiece.
(4) Adjust the spacing of the blade guide arms.
(5) Presect the required cutting length of the workpiece.
(6) Depress BAR FEED PORWARD buttin until the workpiece touch the bar stop feeler.
(7) Adjust the FEED RATE.
(8) Depress BLADE DRIVE button to start both the saw blade motor and the cutting fluid pump and
the saw frame begins to descend.
(9) After completion of the cut saw blade stops at the lower limit position.
(10) Depress the RAISE button to cut next piece again.
4 – 4

*. Before you start to cut the workpiece, you must inspect that....
*. The workpiece is well clamped.
*. The saw blade is suitable for the material being cut.
*. The feed rate is suitable for the material being cut.
*. The speed of the saw blade is suitable for the material being cut.
*. The insert adjusting screw and the lock lovers of the blade guide arms are all tightened.
*. Sufficient tension is placed on the saw blade.
*. The wire brush is properly positioned.
*. There is sufficient cutting fluid in good condition.
*. The off-cut length is as required.
4.4 AUTOMATIC OPERATION :
Having finished all the procedures described above in (2) Operating Preparation ,and with the workpiece
to be cut placed in the vice of the machine , but NOT under the saw blade.
(1) Turn the AUTO-MANUAL selector to auto.
(2) Depress the QUICK APPROACH switch to make the saw frame descend quickly to touch the lower
limit position , it will then rise automatically to the height preset.
(3) Make any necessary adjustments to HEIGHT SELECTOR to ensure that the saw blade clears the
material by 1/2 to 3/4 inch then repeat (2) above to check setting.
(4) Depress BAR FEED FORWARD button until the workpiece touches the bar stop feeler.
(5) Preset the number of cuts required.
(6) Depress the BLADE DRIVE button to start both the saw blade motor and the cutting fluid pump.
The saw frame begins to descend to cut workpiece.
(7) After the required number of cut has been completed, the saw frame will lift to the raised position
and all machine operation will stop.
(8) The machine will automatically stop, when the workpiece is so short that it can no longer be
automatically feed.
4.5 SPECIAL OPERATION :
(1) While you are cutting a workpiece, if the saw blade suddenly jams in the workpiece, depress the
FRAME RAISE button to lift the saw frame immediately.
(2) The saw blade jamming in the workpiece is most likely because of :
a. Slippage occurring between saw blade and drive wheel.
Tension placed on the saw blade is not sufficient.
b. Slippage occurring between drive belt and motor pulley.
Tension on drive belt is not sufficient or belt is worn.
c. Broken teeth on saw blade.
d. Too blunt saw blade.
e. Too fine tooth spacing on saw blade for material being cut.
f. Too fast feed rate for material being cut and blade used.
4 - 5

4.6 BREAK-IN OPERATION :
When a new blade is used , be sure to first break in the blade before using it for extended operation.
Failure to break in the blade will shorten the service lift of the blade ,and result in less than optimum
efficiency. To break in the blade ,proceed as follow :
(1) Reduce the blade speed setting to one half of its normal setting .
(2) Lengthen the time required for cutting to 2-3 times that of normal.
(3) The break- in operation can be considered sufficient if all unusual noises or metallic sounds have been
eliminated. (For instance, to completely break in the blade, a minimum of five complete cuts of a
200mm (8 ins) diameter work- piece will be required.)
(4) After the break-in operation has been completed, return the blade speed and feed rate to their normal
setting.
4 – 6

ADDITION 1: Amplifying Valve
(1.) The outlines and hydraulic circuits:
(2.) SET-UP
A. The hydraulic pressure indicated in line <p> should be kept in constant during the whole stroke
of the lifting cylinder, i.e. Between the very top and bottom position of the swinging saw frame.
we use springs <r> inside of lifting cylinder to balance/compensate the pressure changes (pressure
varies due to saw frame swinging up and down ) in line <p>. above procedures have been done in
our factory before machine dispatched , now for checking test, please dry run the machine by raising
the saw frame to the very top position and push the saw blade drive button, and having the quick
approach rod lifted (limit switch un-touched), then check the hydraulic pressure in line <p> by
reading the pressure gauge at line <p> to see if the pressure readings keep the same during the whole
stroke.
(maximum 1 kg/sq.cm varies allowed) the pressure reading should be as follows:
8 KG/SQ.CM ............250/300 MODELS
10 KG/SQ.CM ............360/400/450 MODELS
4 – 7

B. Re-zeroing knob "a" & "b" on the amplifying valve:
For zeroing knob "a", there is a hydraulic pressure gauge as drawing <S> needed, Please plug it
onto the outlet on the amplifying valve.
Pressure read at line <p> as the primary pressure............pressure <p>
Pressure read at amplifying valve as the secondary pressure.. pressure <s>
The primary pressure should be kept the same reading, and the secondary pressure can be adjusted
by turning knob "b" for cutting pressure settings zeroing knob "a" :
------------------
Dry run the machine as stated in above paragraph,
Turn knob "b" while reading pressure <s>, If there is any pressure can be read, then turn knob "a"
While watching saw frame, if the saw frame shall stand still there without coming down, then there is
the zero position of the knob "a" ( zero feed-rate ), check the " △" mark on the knob "a" to see if
this mark pointing to "0" position. If not, loosen set screw and zeroing it ( Please make sure tighten
the set screw after zeroing ). zeroing knob "b" :
------------------
After zeroing knob "a", turn knob "a" at "5" position, and let the machine running in the same
condition as previous did - dry running. turn knob "b" while reading pressure <s>, If the pressure
reach 5.5 to 6 kg /sq.cm, then loosen the set screw on the knob "b" and have the " △" mark
pointing to "5" position and tighten the set screw.
(3.) OPERATION
Knob "a" is for maximum feed-rate setting:
The smaller the diameter of the material being cut, the higher feed-rate.
The softer the material being cut, the higher feed-rate can be set. And vice-versa.
Knob "b" is for cutting pressure setting:
The tougher the material being cut, the hiher cutting pressure needed. For instance, when cutting
thin pipes/tubes, mild carbon steels, Only little pressure needed, and for stainless/high alloy tool
steels or inconel special steels, high cutting pressure should be needed. There are bothAISI/JIS
material codes shown on the control panel, Please refer to it for proper cutting pressure setting.
LIMITATION: The sum of the number set on knob "a" and "b" can not exceed 10.
4 – 8

5. Maintenance
5.1 Hydraulic Circuit
5 - 1