Malfunctions
Version 1.0 - 2020-12-10
74
Translation of original operating instruction
GT22
EN
GT22_G
B_6
.f
m
8
Malfunctions
Malfunction
Possible cause
Solution
Chatter marks as a result of
vibrations.
•
The anchoring of the machine is
not stable enough.
•
Adjusting screws Lock nuts in the
machine base are loose.
•
Work tables do not run smoothly.
•
Grinding wheel does not sit firmly
on the flange.
•
Flange is not tight on the spindle.
•
Grinding wheel and flange are not
well balanced.
•
Grinding wheel is not homogene-
ous.
•
Grinding wheel is not well
dressed.
•
Too much pressure on the spin-
dle.
•
Transmission of vibrations from
neighbouring machines.
•
Connection between motor and
spindle is loose or parts are dam-
aged.
•
Stabilize the anchorage.
•
Check alignment, tighten lock
nuts.
•
Slideway oil does not reach the
lubrication points.
•
Replace wheel between grinding
wheel and flange.
•
Clean contact surfaces, check
tightness.
•
Balance grinding wheel and
flange.
•
Remove the grinding wheel and
balance or replace it.
•
Check position of diamond and
puller, replace diamond if neces-
sary.
•
Excessive infeed of the grinding
wheel.
•
Improve anchoring of the
machine or move the machine to
a vibration-free location.
•
Fix or replace connecting parts.
Flutter marks on the surface of the
workpiece
•
Uneven running of the grinding
wheel.
•
Grinding wheel too hard or blunt.
•
Vibrations coming from the build-
ing or the street.
•
Voltage phases of the power sup-
ply are not uniform.
•
Use a softer or coarser-grained
grinding wheel.
•
Use vibration plates or stabilize
anchoring.
Beam pattern
•
Spindle bearing defective, run-
ning noises ?
•
Change spindle bearing
Comma-shaped lines are created
during precision grinding
•
Coolant dirty.
•
Dirt on workpiece.
•
Clean coolant or use filter.
•
Clean the inside of the grinding
wheel cover or replace the grind-
ing wheel.
burn marks and cracks
•
Grinding wheel too hard.
•
Pendulum speed too high
•
Grinding wheel is dull or
smeared.
•
Too much material removal.
•
Ineffective cooling
•
Use a softer or coarser-grained
grinding wheel.
•
Reduce the oscillation speed.
•
Remove the grinding wheel.
•
Reduce crossfeed
•
Use coolant suitable for the grind-
ing wheel and the material to be
machined.
Firing does not work.
•
Machine poorly aligned.
•
Align the machine.
Worktable does not run smoothly.
•
Poor grease lubrication
•
Lubricate with grease
