59
Planer-Thicknesser
A 941 / AD 941 / AD 951
11.4 Faults, causes and repairs
Fault
Cause
Repair
Machine does not start
Main switch at setting „0“
Check switch position
Emergency stop switch engaged
Unlock the Emergency stop button
Planer tables and/or vacuum hood incor-
rectly positioned (Safety break switch is
not activated)
Close planer tables properly and position
the vacuum hood correctly
Squeaking noises when start-
ing up
Insufficient tension (Drive belt)
Retensioning the drive belt
The joint is not true (extremely
splayed or open joint)
Receiver-side of the planer table is mis-
aligned
Adjusting the joint
Replace the planer knives*1)
Planer knives are worn out
Replace the planer knives*1)
When surface planing, work-
piece stops at the receiver-side
of the planer table
Receiver-side of the planer table is too
high in relation to the circle of cut
Adjusting the joint
Replace the planer knives*1)
„Straight cut“ at the end of the
workpiece when surface plan-
ing
Receiver-side of the planer table is too
low in relation to the circle of cut
Adjusting the joint
Replace the planer knives*1)
The planer fence angle is not
correct
Angle setting misadjusted
Correcting the angle of the planing fence
Unsatisfactory planing result
Planer knives are worn out
Replace the planer knives*1)
„Straight cut“ at the beginning
of the workpiece when thick-
ness planing
Insufficient spring pressure on the feeder-
side (corrugated) feed roller
Adjusting the feed rollers*2)
„Straight cut“ at the end of the
workpiece when thickness
planing
Insufficient spring pressure on the
extraction-side (smooth) feed roller
Adjusting the feed rollers*2)
„Oblique cut“ at the beginning
of the workpiece when thick-
ness planing
Insufficient spring pressure on one side of
the feeder-side (corrugated) feed roller
Adjusting the feed rollers*2)
„Oblique cut“ at the end of the
workpiece when thickness
planing
Outfeed roller (smooth) spring pressure
too low on one side
Adjusting the feed rollers*2)
Electrical height adjustment is
not running
The motor safety switch has been trigge-
red
Cleaning the height guides, lubricating
the height spindle/engage motor safety
switch
*1) System planer knives: Reverse or replace
Standard planer knives: Sharpen or replace
Adjusting the joint
*2) Contact service technician
Faults
Summary of Contents for AD 941
Page 13: ...13 Planer Thicknesser A 941 AD 941 AD 951 Safety...
Page 67: ...67 Planer Thicknesser A 941 AD 941 AD 951 Faults...
Page 69: ...69 Planer Thicknesser A 941 AD 941 AD 951 Annex...
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