8
Malfunctions
Malfunction
FI protective
switch on machines with
frequency converter triggers.
Motor is getting hot
Noise during work.
Drill "burns"
Drill tip is running off centre, the
drilled hole is non-round
Drill is defective
Drill is running non-round or
shaking
It is not possible to insert the drill
chuck or the taper mandrel
Motor does not start
Motor is overheating and there is
no power
Precision of the work deficient
Drilling spindle sleeve does not
return to its initial position
The drilling spindle cannot be
moved downwards.
Malfunctions
Version 1.1.3 - 2020-07-21
Cause/
possible effects
•
an unusual
FI protective switch is being used
•
Wrong electrical connection of 400
V machines
•
Spindle is too little lubricated
•
Tool is blunt or wrongly clamped
•
Drill speed too high /feed too high
•
Chips do not come out of the drill
hole
•
Drill blunt
•
No or too little cooling
•
Hard points on the workpiece
•
Length of the cutting spirals/or
angles on the tool are unequal.
•
Drill deformed
•
No base / support used.
•
Drill deformed
•
Worn out spindle bearings
•
Drill is not correctly clamped.
•
Drill chuck defective
•
Dirt, grease or oil on the taper
inside of the drill chuck or on the
taper surface of the drill spindle
•
Motor is wrongly connected
•
Defective fuse
•
Motor overloaded
•
Too low mains voltage
•
Motor is wrongly connected
•
Irregularly heavy or tensed
workpiece
•
Inexact horizontal position of the
part holder
•
Spindle return spring does not work
•
Locking bolt inserted
•
Locking bolt inserted
•
Drill depth adjustment no released
Translation of the original instructions
Solution
•
Power supply on page 94
•
Lubricate spindle (only possible
when disassembled)
•
Use new tool and check tension
(fixed setting of the bit, drill chuck
and taper mandril.
•
Select another speed
•
Extract drill more often during work
•
Sharpen or
use new drill
•
Use cooling agent
•
Use new drill
•
Use support and clamp it with the
workpiece
•
Use new drill
•
Have the spindle bearings replaced
•
Correctly clamp drill
•
Replace the drill chuck
•
Clean surfaces well
•
Keep surfaces free of grease
•
Have it checked by authorised per-
sonnel
•
Reduce feed rate
Disconnect immediately and have it
checked by authorized personnel
•
Have it checked by authorised per-
sonnel
•
Balance the piece statically and
secure without straining
•
Adjust part-holder
•
Check spindle return spring, replace
it, if necessary
•
Pull out locking pin
•
Pull out locking pin
•
Release drill depth adjustment
B34H | B34HV
GB
117