Optimum 302 0420, Руководство по эксплуатации, Страница: 117 / 162

Malfunctions
Version 1.1.4 - 2022-09-14 117 Originalbetriebsanleitung
DH24BV | DH28BV | DH34BV | DH40BV GB
D
H
B
V
_G
B_9.
fm
7 Malfunctions
Malfunction
Cause/
possible effects
Solution
Motor is hot • Wrong electrical connection of 400
V machines •
Noise during work. • Spindle is too little lubricated
• Tool is blunt or wrongly clamped
• Lubricate spindle (only possible
when disassembled)
• Use new tool and check tension
(fixed setting of the bit, drill chuck
and taper mandril)
Drill "burns" • Incorrect speed/feed too fast
• Chips do not come out of the drill
hole.
• Drill blunt
• No or too little cooling
• Select another speed
• Extract drill more often during work
• Sharpen or
use new drill
• Use cooling agent
Drill tip is running off centre,
the drilled hole is non-round • Hard points on the workpiece
• Length of the cutting spirals/or
angles on the tool are unequal
• Drill deformed
• Use new drill
Drill is defective • No base / support used. • Use support and clamp it with the
workpiece
Drill is running non-round or
shaking • Drill deformed
• Worn out spindle bearings
• Drill is not correctly clamped.
• Drill chuck defective
• Use new drill
• Have the spindle bearings replaced
• Correctly clamp drill
• Replace the drill chuck
It is not possible to insert the
drill chuck or the taper
mandrel • Dirt, grease or oil on the taper
inside of the drill chuck or on the
taper surface of the drill spindle
• Positioning the follower in the drill
spindle is not considered
• Clean surfaces well
• Keep surfaces free of grease
Motor does not start • Motor is wrongly connected
• Defective fuse
• Drill chuck protection not closed
• Have it checked by authorised per-
sonnel
• Close drill chuck protection
Motor is overheating and
there is no power • Motor overloaded
• Too low mains voltage
• Motor is wrongly connected
• Reduce feed rate
Disconnect immediately and have it
checked by authorized personnel
• Have it checked by authorised per-
sonnel
Precision of the work deficient • Irregularly heavy or tensed 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 does not work
• Integrated drill drift (only DH 28 BV,
DH 34 BV) is defective or clamped
• Check spindle return spring, replace
it, if necessary
• Check integrated drill drift, replace it
if necessary