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Summary of Contents for Cosen MH-350DM
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Page 1: Instruction Manual
Bandsaw Specialist SINCE 1976 MH-350DM Manual Swivel Head Double-Mitering Band Saw （CE Model） Instruction Manual COSEN MACHINERY INDUSTRIAL CO.,LTD. - Page 3 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.
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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.
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Page 7: Table Of Contents
Table of Contents Safety Information Section 1 – Safety Instructions ……………………………………………………………………………………………………… 1-1 Safeguard Devices ………………………………………………………………………………………………………. 1-3 Emergency Stop …………………………………………………………………………………………………………. 1-4 Illustration: Emergency Stop ……………………………………………………………………………………… Safety Labels ………………………………………………………………………………………………………………. 1-6 Illustration: Safety Labels ………………………………………………………………………………………..… Hearing Protection ……………………………………………………………………………………………………... 1-9 CE Compliance ……………………………………………………………………………………………………………. 1-9 Risk Assessment …………………………………………………………………………………………………………. - Page 8 Table of Contents Control Buttons ……………………………………………………………………………………….…….. 4-5 Standard Accessories ………….………………………..……………………………………………….…………… 4-6 Unrolling & Installing the Blade …………..………..……………………………………………………………. 4-8 Installing a new blade …………………………………………………………………………………………………. 4-10 Adjusting Wire Brush ………..……………………………………………………………………….………………. 4-11 Placing Workpiece onto Workbed ………..………..…………………………………………………………… 4-11 Adjusting Saw Bow Inclining Angle ………..………..…………………………………………………………. 4-12 ………..……………………………………………………………………….…………………….
- Page 9 Table of Contents Troubleshooting Section 9 – Introduction ……………………….…….…………………..……………………………………………………………. 9-1 Precautions ………………….…………………..……………………………………………………………………..9-2 General Troubles & Solutions ………………………..……………………………………………………………. 9-2 Minor Troubles & Solutions ………………………..………………………………………………..……………. 9-3 Motor Troubles & Solutions ………………………..…………………………………………………..…………. 9-3 Blade Troubles & Solutions ………………………..……………………………………………………………….. 9-4 Sawing Problems & Solutions ………………………..…………………………………………………………… 9-5 Re-Adjusting the Roller Table ………………………..…………………………………………………………….
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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 Wear proper apparel during operation information. Read through it carefully and when servicing the machine. Some before operating this machine to personal protective equipment is prevent personal injury or machine required for the safe use of the machine, damage.
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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: 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 or as soon as it starts slipping, the sensor will detect and stop the drive wheel and the machine. -
Page 15: Illustration: Emergency Stop
Illustration: Emergency Stop Emergency Stop button Emergency Stop... -
Page 16: Safety Labels
SAFETY LABELS Please read through and understand these safety labels before operating the machine. Refer to Illustration: Safety Labels. Label Meaning Label Meaning Impact Hazard Read Operator’s Manual WEAR SAFETY SHOES. Do This manual has important safety not approach dropping area information. -
Page 17: Illustration: Safety Labels
Illustration: Safety Labels... -
Page 18: Hearing Protection
Section 7. 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 19: 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 20 SPECIFICATION MH-350DM Model Manual Swivel Head Double-Mitering Band Saw 0° +45° +60° -45° Miter Degree 350 mm 300 mm 140 mm 300 mm (13.7”) (11.8”) (5.5”) (11.8”) Capacity 200 mm 200 mm 140 mm 200 mm (7.9”) (7.9”) (5.5”) (7.9”)
- Page 21 MACHINE PARTS IDENTIFICATION blade tension handle Blade Motor Saw Blade Gear Reducer Vise AdjustingCuttingWidth Control Panel...
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Page 22: Floor Plan
FLOOR PLAN Machine top view... - Page 23 Machine front view...
- Page 24 Machine right view...
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Page 25: 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 26 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 27 L 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 28 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.
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Page 29: Illustration: Lifting Points
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 30: 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 31: 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 32: 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 33: 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 35: 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 36: 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 37: 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 38: 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 and the light system. The operator must fully understand the function of each switch and button before operating the machine. CONTROL PANEL Name Name... -
Page 39: Control Buttons
Control Buttons 1. Emergency stop button Press this button to stop the machine in an emergency. When the button is pressed, it brings the machine to a full stop. The button locks when pressed. In order to unlock it, please turn the button clockwise. -
Page 40: Standard Accessories
STANDARD ACCESSORIES Blade tension device This device is used to adjust blade tension To adjust blade tension, follow these steps: 1. Press Emergency stop button. To lift up saw bow 2. Turn the handle counterclockwise allowing the band wheel to come down and releasing the blade tension. - Page 41 position of the vice early. Turn Frequency converter (Control of saw blade speed) Frequency converter is mounted on the control panel . It is used to control and stabilize the saw blade speed during cutting. To adjust blade speed, use the blade speed control knob on the control panel.
- Page 42 Coolant pump The coolant pump supplies coolant to cool off cutting temperatures during cutting. Also, it can be used to wash off chips. AUXILIARY FIXING DEVICE assists cutting materials fixation...
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Page 43: Unrolling & Installing The Blade
UNROLLING & INSTALLING THE BLADE Always wear leather gloves and protection glasses when handling a blade. Unrolling the blade Please follow the procedures illustrated below. -
Page 44: Installing A New Blade
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. Step 3 - Lift up saw bow to rear limit switch position . Step 4 - Turn the handle counterclockwise allowing the band wheel to come down and releasing the blade tension. -
Page 45: Adjusting Wire Brush
ADJUSTING WIRE BRUSH Follow these steps to adjust wire brush to appropriate position: Step 1 – Loosen the adjustment screws. Step 2 – Adjust the adjustment screws to make brush move left/right until it makes proper contact with the saw blade (see below illustration). Step 3 –... -
Page 46: Adjusting Saw Bow Inclining Angle
as close as to the blade line aspossible to maximize cutting stability. 3. Pull the handle forward and turn to the left to fasten the movable vise . Saw bow inclineded angle will affect cutting ability. Refer Section 2 for product specification. Step 4–... -
Page 47: Adjusting Blade Speed
ADJUSTING BLADE SPEED Step 1 – Set the flow control to “0” position. Step 2 – Press the saw blade start button to start the blade. Step 3 – Turn the blade speed control knob to adjust the blade speed. The blade speed should be adjusted based on the size and the material of the workpiece. -
Page 48: Cutting Operation
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 – Disassemble shipping brackets and bolts. Step 2 – Turn on the relay switch in the control box. Step 3 –... -
Page 49: Terminating A Cutting Operation
STOP TERMINATING A CUTTING OPERATION • To terminate a cutting operation, press either the saw bow backward button or the emergency stop button. • The saw blade will stop running when the saw bow backward button is pressed. • Both the saw blade and hydraulic pump motors will stop running when the emergency stop button is pressed. -
Page 51: Electrical System
Section 5 ELECTRICAL SYSTEM ELECTRICAL CIRCUIT DIAGRAMS... -
Page 53: Hydraulic System
Section 6 HYDRAULIC SYSTEM HYDRAULIC DIAGRAMS... -
Page 55: 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 56 INTRODUCTION TP I: 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 (t pi). 1 inch equates to 25.4 mm. A distinction is made between constant tooth pitches with a uniform tooth distance, 2 tpi for ex ample, and variable tooth pitches with different tooth distances within one toothing interv al.
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Page 57: 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 58: 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 59: 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 for routine change 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 60 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 61 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 62 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.
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Page 63: Precautions
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 64 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 65 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 66 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 67 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 68 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 69 #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 70 #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 71 #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 72 #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 73 #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.
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Page 74: 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 75: Parts
Section 10 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... - Page 77 10_2...
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Page 93: Warranty
Section 11 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 96 COSEN SAWS Vertical Plate Saws Horizontal Billet Saws NC/CNC Band Saws Structural Miter-Cutting Saws Automatic Band Saws Industry 4.0 Cosen Predictive Computing Visit our website at www.cosen.com COSEN MECHATRONICS CO., LTD.
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