Cosen C-420NC, Instruction Manual, Page: 87 / 138

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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
    
Use of blade with incorrect pitch Use blade with correct pitch suited
to workpiece width
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Failure to break ‐ in saw blade Perform break ‐ in operation
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Excessive saw blade speed Reduce speed
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Insufficient saw blade speed Increase speed
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Excessive saw head descending speed Reduce speed
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Insufficient saw head descending speed Increase speed
 
Insufficient saw blade tension Increase tension
   
Wire brush improperly positioned Relocate
  
Blade improperly clamped by insert Check and correct
    
Improperly clamped workpiece Check and correct
  
Excessively hard material surface Soften material surface
  
Excessive cutting rate Reduce cutting rate
 
Non ‐ annealed workpiece Replace with suitable workpiece
   
Insufficient or lean cutting fluid Add fluid or replace
   
Vibration near machine Relocate machine
 
Non ‐ water soluble cutting fluid used Replace
  
Air in cylinder Bleed air
  
Broken back ‐ up roller Replace
    
Use of non ‐ specified saw blade Replace
    
Fluctuation of line voltage Stabilize
  
Adjustable blade guide too far from
workpiece
Bring blade guide close to
workpiece
   
Loose blade guide Tighten
 
Blue or purple saw chips Reduce cutting rate
  
Accumulation of chips at inserts Clean

Reverse positioning of blade on machine Reinstall
  
Workpieces are not bundled properly Re ‐ bundle
  
Back edge of blade touching wheel
flange
Adjust wheel to obtain clearance
  
Workpiece of insufficient diameter Use other machine, suited for
diameter of workpiece Replace
  
Saw blade teeth worn Replace