Malfunctions
Version 1.0.1 - 2020-09-07
55
Translation of original instruction
DQ14 | DQ18 | DQ22
EN
D
Q
14_
D
Q
18_
D
Q
22_
GB_8
.f
m
8
Malfunctions
Malfunction
Cause/
possible effects
Solution
Noise during work.
•
Tool blunt or incorrectly clamped.
•
Grease at the toothing of the spin-
dle used up
•
Spindle bearing defective
•
Bearing in idler pulley V-belt at
DQ22 defective
•
Use new tool and check tension (fixed
setting of the bit, drill chuck and taper
mandril)
•
•
Put grease in,
•
Have permanently lubricated spindle
bearings replaced by qualified person-
nel.
Bit „burnt“
•
Incorrect speed
•
Chips are not coming out of the
drilled hole.
•
Blunt drill bit.
•
Operating without cooling agent.
•
Choose a different speed, excessive
feed.
•
Retract the drill bit from the bore hole
more often.
•
Sharpen the drill bit or insert new drill
bit.
•
Use coolant.
Drill point runs off, drilled hole
is not circular.
•
Hard material or length of the cut-
ting spirals/or angles on the tool are
unequal
•
Drill bit is bent.
•
Use a new drill bit.
Drill is running non-round or
shaking
•
Drill bit is bent.
•
Drill is not correctly clamped.
•
Drill chuck defective
•
Replace drill bit
•
Clamp the drill bit properly.
•
Replace the drill bit chuck.
The drill chuck or the Morse
taper MT2 / B16 cannot be
inserted or does not hold in
the taper by itself.
•
Dirt, grease or oil on the taper
inside of the drill chuck or on the
taper surface of the drill spindle
•
Clean surfaces well.
•
Keep surfaces free from grease.
Motor does not start.
•
On DQ22, drill chuck protection not
closed
•
Protective cover V-belt not closed
•
Defective control fuse (microfuse)
on DQ22
•
Close drill chuck guard at DQ22
•
Close protective cover of V-belt
•
Check control fuse on DQ22 and
replace if necessary (DQ14 and DQ18
have no control fuse)
DQ22 - fine-wire fuse“ on page 38
Motor runs only if the push
button "On" is pressed
permanently.
•
Relay restart protection defective.
•
Have On / Off switch KJD17B replaced
by qualified personnel.
Motor overheated and no
power
•
Motor overloaded?
•
Too low mains voltage
•
Motor incorrectly connected (DQ22
400V three-phase current)
•
Switch off immediately and have it
checked by qualified personnel
Precision of the work deficient
•
Heavy and unbalanced or deformed
work-piece.
•
Inexact horizontal position of the
work-piece holder.
•
Balance the piece statically and secure
without straining
•
Adjust workpiece-holder
Drilling spindle sleeve does
not return to its initial position
•
Spindle return spring
•