protech 500DSA User manual

METAL CUTTING BAND SAW
500DSA/H
INSTRUCTION MANUAL
500DSAH-1020403-R1

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1
Table Of Contents Page No
Overall Aspect……………………………………………………………….……….... .... 2
1 Warning ….………………………………………………………………….….….. .. .3
2 Safety rules for all tools ..…………………………………………………………. .... 3
3 Specification …………………….……………………………………………….... .. 6
4 Transportation of machine …………………………………………………..….... ....6
5 Minimum Room Space For Machine Operation ………………………………... .... ..7
6 Make proper tooth selection ……………………………………….………….…. .... ...8
7 BI-Metal speeds and feeds .…………………….………………………………...... ...9
8 Connecting saw to power source ………………………………………………........ ..11
9 Starting and stopping machine (Model：500DSA)……………………………..... .... 12
9 Starting and stopping machine (Model：500DSAH) …………………………..... .... 13
10 Adjusting automatic shut-off limit switch……………..................................... .... ....16
11 Adjusting downward travel of saw arm …………………………………….... .... 16
12 Changing saw blade speeds …………………………………..……...……..….... .. 17
13 Adjusting blade tension …………………………………………………….….. .... 17
14 Adjusting blade guide support arm ………..…..…………………..………...... ..17
15 Adjusting feed rate ……………………….……………………………………...... ...18
16 Adjusting the auxiliary pulling spring of the saw arm ….………….…....... .... ...18
17 Operating cutting angle and adjusting vise .... ……………………………….... ...19
18 Coolant ………………………………………………………………….……........20
19 Adjusting stock advance stop ……………………….………………………....... ..20
20 Adjusting blade guide roller bearings,
carbide blade guides and back-up bearings …………………………….….... ...20
21 Removing and installing the blade ……………………………..…………........ ..21
22 Gear box …………..…………………………………..………………………….... ...22
23 Saw blade brush setting ………………………………………………..……….... ....23
24 Coolant tank and chips container …………………………………………….….... .23
25 Drive belt replacement and proximity sensor adjustment ………………….... .... .23
26 Vise clamping pressure setting ……………………………………………….….... ..24
27 Cutting guide plate adjustment …………………………………………………. .... 24
28 Trouble shooting …………………………………………………………………....25
29 Circuit Diagram ……………………….…………………………………………..28
30 Parts Drawing ……………………………………………………………………….33
31 Parts Lists ……………………………………………………………………………37

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Overall Aspect
CAUTION
Install saw blade and blade guard
before use. Set proper blade tension
to prevent any danger caused by
damaged saw blade or work piece.
Vise clamping pressure
Control box
Arm Blade adjustable knob
Hand wheel
Vise jaw bracket
Support rod Auxiliary pulling spring
Saw blade brush

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1 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 for certain applications only. We strongly recommends 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.
ULES 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 foot wear 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.
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.

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4
(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.
(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 aill 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 work 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 use 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

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5
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 work day.
(7).CHECK COOLANT DAILY Low
coolant level can cause foaming and high
blade temperatures. Dirty or week coolant can
clog pump, cause crooked. Cust, 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.
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 it’s function frequently.
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.

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3 SPECIFICATION
MOTOR 5HP,,( 3Φ)
60Hz 32-96 MPM
105-315FPM
Saw Blade Speed 50Hz 26-80 MPM
85-262FPM
Blade Size(mm) 41 x 1.3 x 5890L
Dimension L x W x H (mm) 3000L x 1270W x 1730H
N.W / G.W (kgs) 1590 / 1800
Packing Measurement 2930L x 1140W x 1981H mm
○(mm/inch) 508 mm / 20”
□(mm/inch) 508 mm x 508 mm /20” x 20”
0°
□(mm/inch) 660 mm x 508 mm /26” x 20”
○(mm/inch) 508 mm / 20”
+ 45°□(mm/inch) 508 mm x 508 mm /20” x 20”
○(mm/inch) 380 mm / 15”
Cutting
Capacity
+ 60°□(mm/inch) 380 mm x 380 mm /15” x 15”
4 TRANSPORTATION OF MACHINE:
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.

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Installation:
As this machine weights 1320 kg. It is recommended that the machine shall 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.
(3). TURN OFF the power before wiring, & be sure machine in proper grounding, Overload &
circuit breaker is recommended for safety wiring.
(4). Tighten 4 bolts to base holes after machine in balance.
(5). CHECK carefully if the saw blade is running in counter-clock wise direction it not reverse
the wiring per circuit diagram then repeat the running test.
(6). KEEP machine always out from sun, dust, wet, raining area.
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.
5 MINIMUM ROOM SPACE FOR MACHINE OPERATION

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6 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 workpiece until it leaves the workpiece, and
1.The shape of the workpiece.
zSquares, 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.
zRound Sollds (Symbol : ●)
Locate the diameter of your workpiece 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.
zTubing, Pipe, Structurals( Symbol : O H ^ )
Determine the average width of cut by dividing the area of the workpiece by the distance
the 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.

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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.
7 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)
BAND SPEEDMATERIAL ALLOY
ASTM NO. FT./MIN M/MIN
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
Coppe
r
Alloy
811 214 65
1117 339 103
1137 289 88
1141,1144 279 85
Carbon
Steel
1141 HI STRESS 279 85

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10
1030 329 100
1008,1015,1020,1025 319 97
1035 309 94
1018,1021,1022 299 91
1026,1513 299 91
A36(SHAPES),1040 269 82
1042,1541 249 76
1044,1045 219 67
1060 199 61
1095 184 56
8615,8620,8622 239 73
4340,E4340,8630 219 67
8640 199 61
Ni-Cr-Mo
Alloy Steel
E9310 174 53
A-6 199 61
A-2 179 55
A-10 159 49
D-2 90 27
Tool Steel
H-11,H-12,H-13 189 58
420 189 58
430 149 46
410,502 140 43
414 115 35
Stainless
Steel
431 95 29
440C 80 24
304,324 120 36
304L 115 35
347 110 33
316,316L 100 30
416 189 58

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TELLTALE CHIPS
Chips are the best indicator 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.
8 CONNECTING SAW TO POWER SOURCE
The electrical rating of your band saw is either 230 volt, single phase or 400 volt, three phase
magnetic control.
Before connecting your machine to an electrical power system, be sure the motor rating agrees with
the electrical system it is to be connected to. We recommend that #14 wire, fused with a 16 amp,
dual element, time lag fuse, 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.

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9 STARTING AND STOPPING MACHINE (Model：500DSA)
9-1 Control Panel Introduction：(Fig. 1)
A. MainSwitchwithKey B. Power Indicator Light
C. Breakdown Indicator D. Saw Bow Down Feed Rate Control
E. Counter for Cutting Pieces F. Auto Cycle Cutting Start Switch
G. EmergencyStop H. Saw Bow Height Control
I. Manual Operation Mode control J. Auto Operation Mode Contro
K. ManualSawBowUp–Down L. Vise Open - Close
M. Saw Blade Running Start – Stop N. Coolant Pump Start - Stop
O. Hydraulic System Start – Sto P. Motor Stop
9-2 Auto Counter for Cutting Pieces (E)
Provide auto accumulation. Press to reset.
9-3 Saw Bow Height Limit Control (H)
Provide saw bow height positioning when in manual or Auto Cutting.
Press “ +“ to increase the height
Press “ – “ to decrease the height
Press – to decrease the height
Indicator ON when saw bow reaching the highest setting point.
Fig.1
AF
D
B
G
H
CI
E
K
JL
NM
PO

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AF
D
B
GH
CI
E
K
JL
N
M
PO
H4H3
H1
H5 H6
H2
9 STARTING AND STOPPING MACHINE ( FOR SAW BOW LEFT-RIGHT ELECTRICAL
ANGLE SWIVEL ) (Model：500DSAH)
9-1 Control Panel Introduction：(Fig. 1) (Fig. 1-1)
A. MainSwitchwithKey B. Power Indicator Light
C. Breakdown Indicator D. Saw Bow Down Feed Rate Control
E. Counter for Cutting Pieces F. Auto Cycle Cutting Start Switch
G. EmergencyStop H. Saw Bow Up-Down and Left-Right Control Section
I. Manual Operation Mode control J. Auto Operation Mode Control
K. Manual Saw Bow Up – Down L. Vise Open - Close
M. Saw Blade Running Start – Stop N. Coolant Pump Start - Stop
O. Hydraulic System Start – Sto P. Motor Stop
H. Saw Bow Up-Down and Left-Right Control Section
H1. Saw Bow Left –Right movement control joystick
H2. Saw bow Height-Angle digital readout
H3. Number setting “ +“ H4. Number setting “ -“
H5. Saw Bow Height setting mode H6.Saw Bow Angle setting mode
Fig.1
Fig. 1-1

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9-2 Auto Counter for Cutting Pieces (E)
Provide auto accumulation. Press to reset.
9-3 Saw Bow Up-Down and Left-Right Control Section (H)
Attention: 1. the left light of readout is flashing, it means the number is inputting into the
program. When the light extinguished, it means the number is ready to input into the
program.
9-3-1 Saw Bow Height Limit Control Mode (H5)
When you push H5, you are in the Saw bow height upper limit setting mode, the number of the
readout is set ready the Max height of saw bow lifting.
Provide saw bow height positioning when in manual or Auto Cutting.
Press “ +“ to increase the height
Press “ – “ to decrease the height
Indicator ON when saw bow reaching the highest setting point.
9-3-2 Saw Bow Angle swivel Control Mode (H6)
Attention:
1. When use Saw Bow Angle Swivel function, please check if there is any barrier in the
route of Saw bow movement. It is dangerous that the saw bow hits the barrier
2. Use H1 joystick to Saw bow angle movement, when there is a collision in the
movement, please let go the joystick, the movement will stop.
3. There is a Saw bow height safety setting. When blade in the slot of work table, the
angle swivel system won’t start, the blade must higher than the work table surface
about 35mm, the angle swivel system can be started.
4. The adjustment of machine setting, must be at the blade higher than the work table
surface about 35 mm.
zWhen push H6 button, you are in Saw Bow Angle setting Mode, the number of the readout is
the current angle of the Saw Bow.
zWhen push H3 or H4, readout will transfer to display the angle set number, now you can push
H3 or H4 to change the angle set number. (Attention: When the radio station starting starts
again, after the definite angle is 0 degrees, only then may establish the angle numeral.)
zWhen doing the setting, the left light of readout will keep flash, when stop input, about 2
second, the system will input the number on the readout into the program, the left light
distinguished means the target number setting ready.
zWhen the target number setting ready, the readout will back to show current angle, now you
can use the joystick to do the saw bow angle swivel, can do small move operation, or press the
joystick until the saw bow move to the target angle, the saw bow position in the target angle.
(System will stop twice before the target angle, and then 2 seconds pass, a small move to the

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15
target angle and stop)
zWhen target angle is 45 degree, the saw bow will only move between the 45 degrees and
minus 45 degrees, won’t over this degree. (This Max angle setting of RF-500DSA is 60 degree
and minus 60 degree.
zWhen the readout showed the angle value, the right point is bright, it means the angle is minus
degree (saw bow is in clockwise position), when the light point is distinguished, it means the
angle is positive degree (saw bow in counter-clock position).
zWhen you want the saw bow back to the Zero degree position, you can push “ +“ or “ -“ to
set the Zero degree. Or push the “Zero degree setting button.”
*** Zero degree setting buttonÆplease push H3 and H4 in the same time for about 2 seconds, the
degree value will set Zero degree.
9-3-3 Machine Zero Degree Correction
*** (Attention: Machine Zero Degree Correction, must be executed by a professional
engineer who have the ability to adjust the machine, to prevent the unnecessary mistake
happened in angle degree system.)
zMachine Zero degree was corrected when leave from the factory, if the zero degree of blade
against fixed vise plate was offset or inaccuracy, it need to proceed the machine zero degree
correction.
zWhen engineer correct the blade position to zero degree, you just push the “Zero degree
correction button”, System will input the zero value to the program, and display “ 0 “ on the
readout, the zero degree correction is finished.
*** “Zero degree correction button” Æplease push H5 and H6 in the same time for about 2
seconds, the degree value will set Zero degree.
9-4 Cutting Work Piece Operation (Model：500DSA/H ↓)
9-4-1 Manual Operation – Position the work piece
1. Open main switch (A), main switch light ON (B)
2. Select manual mode (I), start the hydraulic system (O),
3. Set the saw bow height (H), raise the saw bow to position(K)
4. Put the work piece in clamping position (L)，set the proper work piece length and position, clamp
the work piece firmly.。
9-4-2 Auto Cutting Operation
1. Once the work piece clamping and saw bow height are in position, indicator light ON, (C) auto
cutting mode is completed. Start the auto cutting.
2. Select Auto mode (J), hydraulic system will stop automatically. Need to restart. (O),
3, Open the auto cycle button (F), machine will complete following motion:

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16
Saw blade run ÎSaw bow down (please adjust the down feed rate by manual.), cutting
begin.ÎCutting complete ÎSaw blade stop ÎSaw bow up to the limit ÎVise open work piece
released.
10 ADJUSTING AUTOMATIC SHUT-OFF
LIMIT SWITCH
An automatic shut-off limit switch is provided to
stop the motor when the cut is completed. The limit
switch (D) is controlled by a lever Fig. 3, which
contacts the top of the hydraulic cylinder (E)
shutting off the motor and coolant pump
If the motor stops before the cut is completed or
con-tinues to run after the cut is completed, the limit
switch (D) Fig. 2. Can be adjusted up or down by
loosening the screws (F).
11 ADJUSTING DOWNWARD TRAVEL OF
SAW ARM
The downward travel of the saw arm should be
adjusted so that when the saw arm is in the extreme
downward position, the teeth of the blade are 1/8”
below the tab-le surface. If an adjustment is
necessary, loosen lock nut (A) Fig. 3. And turn stop
screw (B) in or out until the correct adjustment is
made. Then tighten lock nut (A).
Fi
g
.2 F E
D
Fi
g
.3 A B

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17
12 CHANGING SAW BLADE SPEEDS
This machine is available for variable speed
selection. Speed range is 32~96MPM (Fig,4).
When changing the speed, turn the speed dial (A)
watch the LED (B), select the desired speed
** Please refer to TPI and saw blade speed selection
chart in this manual, for the reference of cutting
relative work piece and material with proper feeding.
13 ADJUSTING BLADE TENSION
When adjusting saw blade tension, please open the
saw blade cover to assure the saw blade is in correct
position on blade wheel.
To adjust saw blade tension, please turn the tension
handle Fig.5 (A)，clockwise to increase the tension,
counter-clockwise to decrease. The tension can be
directly seen on the tension meter. Proper tension
range is 21000 ~24000 lb.
Always release blade tension at the end of each work
day to prolong blade life.
14 ADJUSTING BLADE GUIDE SUPPORT ARM
The blade guide support arm (B) Fig. 7, should be set as
close to the workpiece as possible. To move the sup-port
arm, first loosen clamp knob (A). move the support arm (B)
into relationship with the workpiece. When you are sure the
support arm will not interfere with the workpiece, first
tighten clamp knob (A).
Fi
g
.4 B
A
B Fi
g
.5 A
A
B Fi
g
. 7

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18
15 ADJUSTING FEED RATE
When the feed rate control knob is turned clockwise
as far as it will go the saw frame will not move
down, but it can be raised to the up position. By
turning the feed rate control knob counter clockwise,
the flow of oil from the cylinder is regulated and
determines the speed at which the saw frame will
lower and the blade will feed through the work. Too
many factors are involved to make tabulated data
practical on feed rates. As a general rule, an even
downward pressure without forcing the blade gives
best results. Avoid forcing the blade at the start as
this may shorten blade life and produce a bad cut.
By in-specting the chips while the cut is being made
will indicate whether the feed rate is correct. Fine powdery chips in-dicate the feed rate is too light;
the teeth are rubbing over the surface instead of cutting. Burned chips indicate ex-cessive feed,
which causes the teeth to break off as the blade overheats. The ideal feed rate is indicated by chips
that have a free curl and this will give the fastest cutting time and longest blade life.
16 ADJUSTING THE AUXILIARY PULLING
SPRING OF THE SAW ARM
The auxiliary pulling spring (Fig.9) is to balance the
downward weight of the saw bow, in order to reach
the best cutting result.
This spring was well designed the proper pulling
rate. Only need to watch if there is losing status. If
yes, please tighten the bolt (A) in position. The
distance between spring surface and the support
surface is 18 mm.
Fig. 8
D
Fig. 9 A

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19
17 OPERATING CUTTING ANGLE AND
ADJUSTING VISE
The swivel angle is positioned every 15 degrees.
The cutting slot Fig,10(A) on working table is in
45 and 60 degrees angle. But you can cut at any
angle with reference of the angle scaleFig,11(A). If
you are cutting in the multiples of 15 degrees,
please operate as follows:
Move the swivel lock handle Fig,11(B) to the right
to release the swivel base. Push the saw bow to
desired angle, with the reference of the angle scale
(A). The saw bow can be self-positioned. When
reach the desired angle, slightly shake the saw bow
left and right. Now the saw bow is in position, lock
the swivel lock handle.
When changing the cutting angle, moving vise can
be displacement back and forth. Push the lock
handle Fig.13(B) to release the moving vise base.
Push the moving vise to desired clamping position.
Set the moving vise base by the lock handle.
When changing the cutting angle, if the coolant
nozzle Fig.12(A) interferes the saw blade guide arm, take off the nozzle and install to the other side
of the vise bracket.
A Fig.10
A Fig.13 BA Fig.12 B
A Fig.11 B