Winterthur Corporation
 

Troubleshooting: Fault Finding and Correction Guide
 

Remember: 
Large Contact Areas - require"slower" wheel speeds.
Small Contact Areas - require "higher" wheel speeds.
 
Rough
Sueface
Vibration
Chatter
Cut Rate
Too Slow
.
Burning
Grinding
Cracks
Tool
Breaking
Poor Form
Holding
 Try These Recommendations:
.
X
.
X
X
X
.
 Reduce the Wheel Speed. (Machines < = 12 hp require 10 or 12 m/s for fluting)
X
.
.
.
.
.
X
 Increase the Wheel Speed.
X
X
.
.
.
.
X
 Check the balance of the wheel.
X
X
.
.
.
.
X
 Check wheel mounting for looseness and "truing" for face or side run out.
.
.
.
.
.
.
X
 True wheel on spindle in the machine if possible. Most accurate but more down time)
X
X
.
.
.
 ..
X
 Check the condition of the wheel hub, spindle, bearings and tool holder for wear.
.
..
.
X
X
X
X
 Check that coolant reaches the actual grinding zone and is at the proper pressure.
.
 .. ..
X
X
X
X
 Check for dirty coolant and its viscosity. (Proper filtration and concentration)
.
.
X
X
X
X
X
 Stick dress the wheel to "open" the cutting face. (Soak stick in water 5 - minutes)
X
X
X
X
X
X
X
 Insure that grit size of dressing stick is optimum for Diamond or CBN size.
.
.
 .
X
X
X
X
 Increase the coolant velocity.
.
.
.
X
X
X
.
 Change from up - grinding, to "down" - grinding.
. .
.
X
X
X
 . Add an extra coolant nozzle to cool the carbide tool
.
.
.
X
X
X
 . Add a "high pressure - scrubbing" nozzle to clean swarf from wheel.
.
 .
..
X
X
X
.
 Add a "chiller" unit to the coolant.
X
X
.
.
.
X
X
 Add steady rest to support the tool.
.
.
X
.
.
.
.
 Increase the infeed of the wheel.
X
.
.
.
.
.
X
 Use less stick dressing pressure.
X
X
.
.
.
.
.
 Reduce the infeed of the wheel.
X
X
X
X
X
X
X
 If you have tried these with no success call our staff for expert support
 
 

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