Cosen C-800NC Instruction Manual

Sns-100 programmable automatic mass production horizontal bandsaw

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COSEN SAWS

C-800NC/C-1000NC

SNC-100 Programmable Automatic

Mass Production Horizontal Bandsaw

(Non-CE & CE Models)

Instruction Manual

The Pinnacle of Cutting Performance

Cosen Mechatronics Co., Ltd.

Table of Contents

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Summary of Contents for Cosen C-800NC

Page 1 COSEN SAWS C-800NC/C-1000NC SNC-100 Programmable Automatic Mass Production Horizontal Bandsaw (Non-CE & CE Models) Instruction Manual The Pinnacle of Cutting Performance Cosen Mechatronics Co., Ltd.
Page 3: From The Manufacturer
FROM THE MANUFACTURER Thank you for your purchase of COSEN’s bandsaw machine and your trust in the COSEN brand. We are excited to have you as our valued customer and look forward as much as you do to the accelerated productivity, long-lasting endurance and superb cost-effectiveness this machine is about to bring to you.
Page 5: Safety Rules
Safety rules  Make sure your work area is cleared of uninvited people and obstacles every time before you start operating the machine.  Never step or stand on the roller table. Your foot may slip or trip on the rollers and you will fall.
Page 6 Safety rules  Never adjust the wire brush or remove chips while the saw blade is still running. It is extremely dangerous if hands or clothing are caught by the running blade.  Stop the saw blade before you clean the machine. It is dangerous if hands or clothing are caught by the running blade.
Page 7: Table Of Contents
Table of Contents Safety Information Section 1 – Safety Instructions ……………………………………………………………………………………………………… 1-1 Safeguard Devices ………………………………………………………………………………………………………. 1-3 Illustration: Safety Fence (CE model only) ………….………………………………………………………. Emergency Stop …………………………………………………………………………………………………………. 1-5 Illustration: Emergency Stop ……………………………………………………………………………………… Safety Labels ………………………………………………………………………………………………………………. 1-7 Illustration: Safety Labels ………………………………………………………………………………………..… 1-10 Hearing Protection ……………………………………………………………………………………………………...
Page 8 Table of Contents Control Buttons ……………………………………………………………………………………….…….. 4-5 HMI Touch Screen & Functions ………….……………….……………….…………………………. 4-8 HMI Error Codes ……….……………….……………….……………….……………….……………….. 4-19 Standard Accessories ………….………………………..……………………………………………….…………… 4-20 Optional Accessories ………….………………………..……………………………………………….…………… 4-23 Unrolling & Installing the Blade …………..………..……………………………………………………………. 4-25 Adjusting Wire Brush ………..……………………………………………………………………….………………. 4-27 Adjusting Saw Arm ………..……………………………………………………………………….…………………… 4-27 Placing Workpiece onto Workbed ……………….………..…………………………………………………….
Page 9 Table of Contents Storage Conditions …………………………..………..…………………………………………………………….. 8-3 Terminating the Use of Machine ……..…………..…………………………………………………………….. 8-3 Oil Recommendation for Maintenance ………………………………………………………………………. 8-4 Troubleshooting Section 9 – Introduction ……………………….…….…………………..……………………………………………………………. 9-1 Precautions ………………….…………………..……………………………………………………………………..9-2 General Troubles & Solutions ………………………..……………………………………………………………. 9-2 Minor Troubles & Solutions ………………………..………………………………………………..……………. 9-3 Motor Troubles &...
Page 11: Safety Information
Safety is a combination of a well-designed machine, operator’s knowledge about the machine and alertness at all times. COSEN’s band machine has incorporated many safety measures during the design process and used protective devices to prevent personal injuries and potential risks. Warning labels also serve as a reminder to the operator.
Page 12 This manual has important safety All users must read it before performing any information. Read through it carefully activity on the machine, such as replacing before operating this machine to prevent the saw band or doing regular maintenance. personal injury or machine damage. Learn the operation, limitation and the specific Some personal protective equipment is required for the safe use of the machine, e.g.
Page 13: Safeguard Devices
SAFEGUARD DEVICES The safeguard devices incorporated in this machine include the following two main parts: 1. Protection covers & guards 2. Safety-related switches Protection Covers & Guards 1. Idle wheel housing cover 2. Drive wheel housing cover 3. Gear reducer cover 4.
Page 14: Illustration: Safety Fence (Ce Model Only)
Illustration: Safety Fence (CE model only) Safety Fence Safety Fence...
Page 15: Emergency Stop
Safety Related Switches To protect the operator, the following safety related switches on the machine are actuated when the machine is in operation. Wheel motion detector This is a proximity sensor used to detect the motion of the drive wheel. Once the saw blade is broken as soon as it starts slipping, the sensor will detect and stop the drive wheel and the machine.
Page 16: Illustration: Emergency Stop
Illustration: Emergency Stop Emergency Stop...
Page 17: Safety Labels
SAFETY LABELS Safety-related labels mounted on the machine are categorized into the following four categories. Please read through and understand them before operating the machine. Refer to Illustration: Safety Labels. DANGER Labels A red and white DANGER labels marks s hazards or unsafe practices that will result in severe personal injury or death.
Page 18 CAUTION Labels Yellow and black CAUTION labels mark hazards or unsafe practices that can result in considerable personal injury. Label Meaning Keep hands out of the machine while the blade is running. Power to machine must be turned off when changing blades or adjusting wire brush.
Page 19 SAFETY INSTRUCTION Labels Green and white SAFETY INSTRUCTIONS are important reminders that should be read before operating the machine. Label Meaning 1. Read and understand the instruction manual and warning signs before operating machine. Failure to follow these instructions and warnings can result in serious injury or death.
Page 20: Illustration: Safety Labels
Illustration: Safety Labels C-800NC /C-1000NC 1-10...
Page 21: Hearing Protection
If maintenance does not seem to solve the problem, follow the troubleshooting procedures under Section 8. CE COMPLIANCE Cosen’s CE model is designed to satisfy regulations of the Council Directive on the approximation of the laws of the Member States relating to machinery (2006/42/EC) - Annex I Essential health and safety requirements relating to the design and construction of machinery.
Page 23: General Information
INFORMATION SPECIFICATION MACHINE PARTS IDENTIFICATION FLOOR PLAN This band saw machine is designed by Cosen’s R&D engineers to provide you the following features and advantages: Safety  This machine is designed to fully protect the operator from its moving parts during cutting operation.
Page 24 SPECIFICATION C-800NC Model NC Controlled Automatic Bandsaw 800 mm (31.5 in) Round 800 x 800 mm (31.5 x 31.5 in) Square Capacity 800 x 850 mm (31.5 x 33.5 in) Rectangular (H x W) W: 280 ~ 850 mm (11.1 ~ 33.5 in) Bundle Cutting H: 247 ~ 800 mm (9.7 ~ 31.5 in)
Page 25 C-1000NC Model NC Controlled Automatic Bandsaw 1000 mm (39.4 in) Round 1000 x 1000 mm (39.4 x 39.4 in) Capacity Square 1000 x 1000 mm (39.4 x 39.4 in) Rectangular (H x W) 15~80 m/min (49 ~262 ft/min) Speed 9400 x 67 x 1.6 mm (370 x 2.64 x 0.06 in) Size (L x W x T) Hydraulic with automatic blade breakage detection Saw Blade...
Page 26: Machine Parts Identification
MACHINE PARTS IDENTIFICATION Machine back view Machine side view...
Page 27: Floor Plan
FLOOR PLAN C-800NC Machine top view Machine back view...
Page 28 Machine side view C-1000NC Machine top view...
Page 29 Machine back view Machine side view...
Page 31: Moving & Installation
Section 3 MOVING & INSTALLATION LOCATION & ENVIRONMENT UNPACKING & INSPECTING LIFTING REMOVING SHIPPING BRACKET CLEANING INSTALLING RELOCATING LOCATION & ENVIRONMENT For your safety, please read all information regarding installation before proceeding. Install your machine in a place satisfying all of the following conditions: Space: ...
Page 32: Unpacking & Inspecting
UNPACKING & INSPECTING  Unpack your machine carefully to avoid damage to machine parts or surfaces.  Upon arrival of your new band saw, please confirm that your machine is the correct model and it comes in the same specification you ordered by checking the model plate on the machine base. ...
Page 33: Lifting
LIFTING When moving the machine, we strongly suggest you choose any one of the methods described below to move your machine. Use a crane (Only applies to the machine with the design of the hanging point.) Move the machine to its location by using a crane and a wire rope sling that can fully withstand the weight of the machine (refer to machine specification under Section 2 General Information).
Page 34  When you work together with more than two people, it is best to keep constant verbal communication with each other. Use a forklift (Only applies to the machine with the design of the lifting point.) Make sure that the lifting rod can fully withstand the weight of the machine. (Refer to Section 2 – General Information for Specifications.) Machine lifting with a forklift should be done strictly according to the lifting points designated by the original manufacturer.
Page 35 3. Use rolling cylinders You can use rolling cylinders to move your machine in a small machine shop environment.  You must use rolling cylinders made in material of proper compressive strength. 4. Other ways to move If the machine does not have stickers, please contact your local agent immediately.
Page 36: Illustration: Lifting Points
Illustration: Lifting Points Machine top view Crane lifting points Forklift lifting points Please remove the covers first before lifting. Minimum weight capacity for each wire rope: 9 tons for C-800NC and 13 tons for C-1000NC Total number of wire ropes required: 4...
Page 37: Removing Shipping Bracket
Do not remove the rust-preventive grease with a metal scraper and do not wipe the painted surfaces with solvent as doing so would damage surface paint. INSTALLING Cosen’s bandsaw machine is relatively easy to install. Follow these six easy steps to install your machine. Connect Leveling &...
Page 38: Supplying Coolant
Have a qualified electrician make the electrical connections. If the power supply voltage is different from the transformer and motor connection voltage shown on the label attached to the electrical compartment of the machine, contact COSEN or your agent immediately.
Page 39: Leveling
Turn off the shop circuit breaker. Make sure the machine circuit breaker switch on the electrical compartment door is turned to OFF. Remove the screw securing the electrical compartment and then open the door. Pull the power supply cable and grounding conductor through the power supply inlet into the electrical compartment.
Page 40: Anchoring The Machine
Anchoring the machine Normally there is no need to anchor the machine. If the machine is likely to vibrate, fix the machine to the floor with anchor bolts. Shock absorption steel plates are provided and can be placed under each leveling bolt to prevent their sinking into the concrete floor.
Page 41: Operating Instructions
Section 4 OPERATING INSTRUCTION SAFETY PRECAUTIONS BEFORE OPERATING CONTROL PANEL STANDARD ACCESSORIES ADJUSTING SAW BOW INCLINING ANGLE UNROLLING & INSTALLING THE BLADE ADJUSTING WIRE BRUSH PLACING WORKPIECE ONTO WORKBED POSITIONING WORKPIECE FOR CUTTING ADJUSTING BLADE SPEED ADJUSTING COOLANT FLOW BREAKING-IN THE BLADE TEST-RUNNING THE MACHINE CUTTING OPERATION TERMINATING A CUTTING OPERATION...
Page 42: Safety Precautions
SAFETY PRECAUTIONS For your safety, please read and understand the instruction manual before you operate the machine. The operator should always follow these safety guidelines:  The machine should only be used for its designated purpose.  Do not wear gloves, neckties, jewelry or loose clothing/hair while operating the machine. ...
Page 43: Before Operating
BEFORE OPERATING Choosing an appropriate saw blade and using the right cutting method is essential to your cutting efficiency and safety. Select a suitable saw blade and cutting method based on your work material and job requirements e.g. cutting accuracy, cutting speed, economic concern, and safety control. Wet cutting If you choose dry cutting or low-speed cutting, the chips may accumulate in machine parts and may cause operation failure or insulation malfunction.
Page 44: Control Panel
CONTROL PANEL The control panel is located on the top of the electrical box. It includes the following function: power system, hydraulic system, cooling system, the human-machine–interface (HMI) and the projecting light system. The operator must fully understand the function of each switch and button before operating the machine.
Page 45: Control Buttons
CE Model Control Panel Name Name Emergency stop button Blade descend speed control knob Power indicator lamp HMI touch screen Saw bow down button Blade speed control knob Saw bow up button Hydraulic start button (moved into HMI) Saw blade start/stop buttons with built-in Front vise open/clamp switch lamp Rear vise open/clamp switch...
Page 46 3. Saw bow down button When this button is pressed, the saw bow descends quickly (the quick approach limit switch must be engaged). When the quick approach limit switch is not engaged and this button is pressed, the saw bow descends according to the blade descend speed control knob setting. Before lowering the saw bow, the guide arm must be positioned outside the vise in order to avoid hitting the vise and causing damages.
Page 47 either of the front and rear vises are unclamped. After the blade motor starts running, this button is disabled due to safety concerns. CE model This switch only works when the machine is switched to setting mode “ ”. 8. Feeding bed backward button When this button is pressed, the feeding workbed will move backward.
Page 48 14. Guide arm left/right switch Turn this switch to the right to move the guide arm to the right. Turn this switch to the left to move the guide arm to the left. The saw bow must be above the middle limit switch AND tungsten inserts must be unclamp to move the guide arm.
Page 49 Startup Screen After the power is turned on, Cosen’s logo will appear as the startup screen, followed by the main operation menu. Main control menu The main control menu includes some operating button that were used on the control panel of the earlier machines.
Page 50 Item Function Description button is temporarily disabled. You need to press the saw blade stop or the saw bow up button to stop the blade first. Saw blade start When the work piece is clamped properly, press this button to start cutting. A solid yellow blade icon indicates the blade has been started.
Page 51 Item Function Description Press again to unclamp. The carbide inserts will automatically clamp the blade when the saw blade start button is pressed. This safety design is incorporated in the program to protect both the user and the blade during cutting. Guide arm to the right Press this button to move the guide arm to the right.
Page 52 Item Function Description been turned on. Press again to turn the lamp off. The projection lamp automatically turns off within 90 seconds. Trim cut ON/OFF This selection button works with the AUTO cutting mode. When under AUTO mode and before proceeding with your automatic cutting jobs, select +0 if you wish the first cut to be “trim cut”...
Page 53 Item Function Description Front vise status Indicates if the front vises have clamped and secured the workpiece. indicator When the front vises have secured the workpiece, the clamping vise icon on the right will turn solid white. Feeding movement When the feeding vise reaches the front limit, the vise set icon will turn solid white.
Page 54 Item Function Description Material cutting This 2-page reference chart lists out the required blade speed and cutting rate for each different reference material. PLC monitor Shows current PLC signals. Error report Lists a historical report of the errors and the time of occurrence as well as provides troubleshooting support.
Page 55 Cutting status display & setup When cutting is in operation, press to enter cutting status display and setup page. Page 1 – cutting status display This page shows the following information (from top to bottom):  The height of the saw bow This function is available only if the optional height decoder is equipped with the machine.
Page 56 Page 2 – Cutting status setup The operator can set different values according to the material properties.  Cut Width - Press this button to set your workpiece width. (Available only when the machine is equipped with the optional height decoder) ...
Page 57 Page 3 – Cutting program setup Same as previously described cutting program setup. Material cutting reference This 2-page reference chart lists out the required blade speed and cutting rate for each different material. Both Metric and Imperial.  Press Home to return to the main control menu. ...
Page 58 Error report Page 1 – error report  Lists a historical report of the errors and the time of occurrence.  Press HOME to return to the main control menu.  Press NEXT to go to the troubleshooting support page. ...
Page 59 Error Error Description Solution Code M300 Front vises not clamping Check if the queen valve works M301 Rear vises not clamping Check if the queen valve works M303 Lower limit switch error Check if the lower limit switch works M304 Hydraulic motor not starting Check if the hydraulic motor works M306...
Page 60: Standard Accessories
STANDARD ACCESSORIES Blade tension device  This blade tension device equipped with hydraulic cylinder provides appropriate tension to the saw blade. Adjusting handle  To tighten the saw blade, turn the selector to  Upon saw blade breakage, the safety device will activate and automatically stop all machine operation.
Page 61 Quick approach device This device allows the blade to quickly descend to just right above Quick approach bar the material to save you operation time. Adjust the quick approach bar according to the workpiece height. Quick approach Generally speaking, the lowest end of the quick approach bar limit switch (painted orange) should be about 10 to 20 mm above the material.
Page 62 Middle limit switch The bracket on the side of the main shaft sets the middle limit switch on while the blade is running. At this time, guide arm cannot be moved and front vise can open be opened in small increments.
Page 63: Optional Accessories
OPTIONAL ACCESSORIES Blade deviation detector This device detects blade deviation. If the blade deviates beyond the preset range, the machine will stop automatically. When this device is installed, the cutting width will be reduced. The blade deviation detected value and preset values are displayed on the control panel screen.
Page 64 Chip conveyor Chip conveyor is a spiral device to bring chips out during Chip conveyor Pressure cutting. control Keep hands away from the chip conveyor assembly. Chip valve conveyor begins to operate as soon as the hydraulic motor is turned on. As a regular maintenance, remove the chip conveyor and clean all chip deposits inside.
Page 65: Unrolling & Installing The Blade
3M powered roller table – remote control With this remote control, you can choose to operate the roller table independently or synchronize the rollers with the movement of workbed vises. You can use the remote control to feed the material both forward and backward. The feed speed selection switch also allows users to quickly and accurately feed the work pieces to the cutting area.
Page 66 Installing a new blade Step 1 - Select the most suitable saw blade for your workpiece considering the size, shape and material. Step 2 - Turn on the machine power by switching to ON and turn on the hydraulic system. Step 3 - Switch to manual ( ) mode.
Page 67: Adjusting Wire Brush
covers and make sure the blade has not fallen off the drive and idle wheels. If the blade has shifted, follow the same procedure to reinstall the blade again. Step 18 - Adjust wire brush to a proper position. Refer to Adjusting wire brush in this section. ADJUSTING WIRE BRUSH Follow these steps to adjust wire brush to appropriate position: Step 1 –...
Page 68: Positioning Workpiece For Cutting
POSITIONING WORKPIECE FOR CUTTING Follow these steps to position your workpiece: Step Action Press the rear vise clamp button until the workpiece is securely rear vises clamp material clamped. Move the vertical alignment rollers toward workpiece until it align vertical rollers stands against the workpiece.
Page 69: Adjusting Coolant Flow
ADJUSTING COOLANT FLOW Step 1 – Press the saw blade start button to start the saw blade drive motor. Step 2 – Press the saw bow down button to lower the saw bow. Step 3 – Use the coolant flow control valve (shown below) to adjust the amount of fluid flowing to the cutting area.
Page 70: Test-Running The Machine
TEST-RUNNING THE MACHINE Test-running this machine can ensure good machine performance in the future. We suggest you run the following tests on the machine before first use: Testing machine performance: Turn on the power and run a basic performance test after you finish installing the machine. Follow these steps to test machine performance: Step 1 –...
Page 71: Starting An Automatic Operation
Step 6 – Start running the blade. Before you start cutting, check again that there is no other object in the cutting area. Step 7 – While the blade descends, adjust the blade speed if necessary. You can do so by turning the blade speed control knob, clockwise to speed up and counterclockwise to slow down.
Page 72: Using Top Clamp For Bundle Cutting
USING TOP CLAMP FOR BUNDLE CUTTING Installing top clamp To perform bundle cutting, use the top clamps and take the following installation procedures. Step 1 – Install stud bolts on the front and rear vises and position the top clamp. Flow control valve Lock nut Top clamp hoses...
Page 73: Terminating A Cutting Operation
Uninstalling top clamp Follow these steps to uninstall top clamp for cutting single material: Step 1 – Disconnect the top clamp hoses. Step 2 – Loosen the lock nuts and remove the top clamp. Step 3 – Remove the stud bolts. STOP TERMINATING A CUTTING OPERATION •...
Page 75: Electrical System
Section 5 ELECTRICAL SYSTEM ELECTRICAL CIRCUIT DIAGRAMS The following are electrical circuit diagrams of the system: C-800NC CE model Fig. 5-1 Main circuit layout Fig. 5-2 EMO circuit layout Fig. 5-3 Vise safety circuit layout Fig. 5-4 110V circuit layout Fig.
Page 76 Fig. 5-1 Main circuit layout...
Page 77 Fig. 5-2 EMO circuit layout...
Page 78 Fig. 5-3 Vise safety circuit layout...
Page 79 Fig. 5-4 110V circuit layout...
Page 80 Fig. 5-5 DC24V layout...
Page 81 Fig. 5-6 Inverter layout...
Page 82 Fig. 5-7 PLC IN1 layout...
Page 83 Fig. 5-8 PLC IN2 layout...
Page 84 Fig. 5-9 PLC IN3 layout 5-10...
Page 85 Fig. 5-10 PLC OUT1 layout 5-11...
Page 86 Fig. 5-11 PLC OUT2 layout 5-12...
Page 87 Fig. 5-12 PLC OUT3 layout 5-13...
Page 88 Fig. 5-13 Control panel layout 5-14...
Page 89 Fig. 5-14 Configuration figure layout 5-15...
Page 90 Fig. 5-15 Control panel layout 5-16...
Page 91 Fig. 5-16 Circuit board layout 5-17...
Page 92 Fig. 5-17 Power supply layout 5-18...
Page 93 Fig. 5-18 PLC I/O layout 5-19...
Page 95: Hydraulic System
Section 6 HYDRAULIC SYSTEM HYDRAULIC CIRCUIT DIAGRAMS The following are hydraulic circuit diagrams of the system: Fig. 6-1 Hydraulic circuit layout (non-CE)
Page 96 Fig. 6-1 Hydraulic circuit layout (non-CE)
Page 97: Bandsaw Cutting: A Practical Guide
Section 7 BANDSAW CUTTING: A PRACTICAL GUIDE INTRODUCTION SAW BLADE SELECTION VISE LOADING BladeBreak -In SOLUTIONS TO SAWING PROBLEMS...
Page 98 INTRODUCTION TPI: The number of teeth per inch as measured from gullet to gullet. 2. Tooth Rake Angle: The angle of the tooth face measured with respect to a line perpendicular to the cutting direction of the saw. 3.Tooth Pitch: Tooth pitch refers to the number of teeth per inch (tpi). 1 inch equates to 25.4 mm. A distinction is made between constant tooth pitches with a uniform tooth distance, 2 tpi for example, and variable tooth pitches with different tooth distances within one toothing interval.
Page 99: Vise Loading
4. Tooth pitch The main factor here is the contact length of the blade in the workpiece. If it is 4P, 25.4 ÷ 4 P = 6.35 mm, that is, one tooth is 6.35 mm. If it is 3P, 25.4 ÷ 3 P = 8.46 mm If the number is small, it means that the tooth is large. What is written as 3/4 is that it is a variable pitch of large (3) / small (4).
Page 100: Bladebreak -In
The following diagrams suggest some costeffective ways of loading and fixturing. Be sure, regardless of the arrangement selected, that the work can be firmly secured to avoid damage to the machine or injury to the operator. BladeBreak -In Completing a proper break-in on a new band saw blade will dramatically increase its life. 1.
Page 101: Maintenance & Service
Section 8 MAINTENANCE & SERVICE INTRODUCTION BASIC MAINTENANCE MAINTENANCE SCHEDULE BEFORE BEGINNING A DAY’S WORK AFTER ENDING A DAY’S WORK Every 2 weeks First 600hrs for new machine,then every 1200hrs EVERY SIX MONTHS STORAGE CONDITIONS TERMINATING THE USE OF MACHINE OIL RECOMMENDATION FOR MAINTENANCE INTRODUCTION For the best performance and longer life of the band saw machine, a maintenance schedule is...
Page 102 MAINTENANCE SCHEDULE We suggest you do the maintenance on schedule. Before beginning a day’s work 1. Please check the hydraulic oil level. If oil level volume is below 1/2, please add oil as necessary.(Filling up to 2/3 level is better for system operation.) 2.
Page 103: Terminating The Use Of The Machine
Every six months 1.Clean the filter of the cutting fluid. 2.Replace the transmission oil for every half of a year(or 1200 hours). Check the sight gauge to ascertain the transmission level. Recommended TRANSMISSION OIL  Omala oil HD220  Mobil comp 632 600W Cylinder oil 3.Replace the hydraulic oil.
Page 104: Oil Recommendation For Maintenance
OIL RECOMMENDATION FOR MAINTENANCE Item Method Revolution Suggest oil Dovetail guide Keep grease covered. Antirust. Daily Shell R2 Roller bearing Sweep clean and oil with lubricant. Daily SEA #10 Bed roller / surface Sweep clean and oil with lubricant. Daily SEA #10 Nipples of bearing Use grease gun, but not excess.
Page 105: Troubleshooting
Section 9 TROUBLESHOOTING INTRODUCTION PRECAUTIONS GENERAL TROUBLES & SOLUTIONS MINOR TROUBLES & SOLUTIONS MOTOR TROUBLES & SOLUTIONS BLADE TROUBLES & SOLUTIONS SAWING PROBLEMS & SOLUTIONS RE-ADJUSTING THE ROLLER TABLE INTRODUCTION All the machines manufactured by us pass a 48 hours continuously running test before shipping out and we are responsible for the after sales service problems during the warranty period if the machines are used normally.
Page 106: General Troubles And Solutions
PRECAUTIONS When an abnormality occurs in the machine during operation, you can do it yourself safely. If you have to stop machine motion immediately for parts exchanging, you should do so according to the following procedures:  Press HYDRAULIC MOTOR OFF button or EMERGENCY STOP button. ...
Page 107: Minor Troubles & Solutions
MINOR TROUBLES & SOLUTIONS TROUBLE PROBABLE CAUSE SUGGESTED REMEDY Saw blade motor does not run Overload relay activated Reset even though blade drive button Saw blade is not at forward Press SAW FRAME is pressed. limit position. FORWARD button MOTOR TROUBLES & SOLUTIONS TROUBLE PROBABLE CAUSE SUGGESTED REMEDY...
Page 108: Blade Troubles & Solutions
BLADE TROUBLES AND SOLUTIONS DISCONNECT POWER CORD TO MOTOR BEFORE ATTEMPTING ANY REPAIR OR INSPECTION. TROUBLE PROBABLE CAUSE SUGGESTED REMEDY Too few teeth per inch Use finer tooth blade Loading of gullets Use coarse tooth blade or cutting lubricant. Teeth strippage Excessive feed Decrease feed...
Page 109: Sawing Problems & Solutions
SAWING PROBLEMS AND SOLUTIONS Other than this manual, the manufacturer also provides some related technical documents listed as follows: Sawing Problems and Solutions Vibration during cutting Failure to cut Short life of saw blade Curved cutting Broken blade   ...
Page 110 SOLUTIONS TO SAWING PROBLEMS Table Of Contents #1. Heavy Even Wear On Tips and Corners Of Teeth #11. Uneven Wear Or Scoring On The Sides Of Band #2. Wear On Both Sides Of Teeth #12. Heavy Wear And/Or Swagging On Back Edge #3.
Page 111 #2. Wear On Both Sides Of Teeth Probable Cause : A. Broken, worn or missing back-up guides allowing teeth to contact side guides. B. Improper side guides for band width. C. Backing the band out of an incomplete cut. #3. Wear On One Side Of Teeth Probable Cause : A.
Page 112 #5. Body Breakage Or Cracks From Back Edge Probable Cause : A. Excessive back-up guide "preload" will cause back edge to work harden which results in cracking. B. Excessive feed rate. C. Improper band tracking – back edge rubbing heavy on wheel flange.
Page 113 #8. Gullets Loading Up With Material Probable Cause : A. Too fine of a tooth pitch – insufficient gullet capacity. B. Excessive feeding rate producing too large of a chip. C. Worn, missing or improperly positioned chip brush. D. Insufficient sawing fluid due to inadequate supply, improper ratio and/or improper application.
Page 114 #12. Heavy Wear And/Or Swagging On Back Edge Probable Cause : A. Excessive feed rate. B. Excessive back-up guide "preload". C. Improper band tracking – back edge rubbing heavy on wheel flange. D. Worn or defective back-up guides. #13. Butt Weld Breakage Probable Cause : A.
Page 115 #16. Body Breakage Or Cracks From Gullets Probable Cause : A. Excessive back-up guide "preload". B. Improper band tension. C. Guide arms spread to maximum capacity. D. Improper beam bar alignment. E. Side guide adjustment is too tight. F. Excessively worn teeth. #17.
Page 116: Re-Adjusting The Roller Table
#20. Broken Band Shows A Twist In Band Length Probable Cause : A. Excessive band tension B. Any of the band conditions which cause the band to be long (#18) or short (#19) on tooth edge. C. Cutting a tight radius. RE-ADJUSTING THE ROLLER TABLE If the feeding table suffers the huge stroke and the alignment is effected, follow the below procedure to adjust.
Page 117: Warranty
Section 10 Warranty Warranty New machines are warranted to be free from defects in workmanship and material for a period of one (1) year from the date of shipment by Seller. The warranty period is based on normal usage of two thousand eighty hours (2080) per year and is reduced proportionately for any excess usage.
Page 119: Parts
Section 11 PARTS SPARE PARTS RECOMMENDATIONS PART LIST SPARE PARTS RECOMMENDATIONS The following table lists the common spare parts we suggest you purchase in advance: Part Name Part Name Saw blade Coolant tank filter Wire brush Steel plates Carbide inserts Rollers Bearings Coolant pump...
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Page 160 Vertical Plate Saws Horizontal Billet Saws NC/CNC Band Saws Structural Miter-Cutting Saws Automatic Band Saws Visit our website at www.cosen.com COSEN MECHATRONICS CO., LTD.

This manual is also suitable for:

C-1000nc