Malfunctions
Version 1.0.2 dated 2018-03-02 Page 65Translation of the original instructions
DH45V GB
DH45V_GB_8.fm
OPTIMUM
MASCHINEN - GERMANY
®
5 Malfunctions
Malfunction
Cause/
possible effects
Solution
Motor is hot • Wrong electrical connection of 400V
machines
•
Automatic feed does not work.
Spindle running will switched
off.
• Wrong direction of spindle rotation
• Wrong phase sequence
• Clamping lever drilling depth
switches off.
• Electronic drilling depth switches
off.
• Electromagnetic clutch is damaged
• Switch to correct spindle rotation
• Clamp the clamping lever in the
uppermost position.
• Check the entered drilling depth.
• Check electrical connection
• Check clutch, replace if necessary
Noise during work. • Spindle is too little lubricated
• Tool is blunt or wrongly clamped
• Gear is too little lubricated
• Lubricate spindle (only possible
when disassembled)
• Use new tool and check tension
(fixed setting of the bit, drill chuck
and taper mandril)
• Lubricate gear
Bit „burnt“ • Drill speed too high /feed too high
• 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
• Bit deformed
• Bearing worn down
• Drill is not correctly clamped.
• Drill chuck defective
• Use new drill
• Have the spindle bearings replaced
• Correctly clamp drill
• Replace the drill chuck
The drill chuck or the taper
mandrel cannot be inserted.
• 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
• Fuse is defective
• Drill chuck guard not closed
• Have it checked by qualified
• Close drill chuck guard
Motor is overheating and
there is no power
• Motor overloaded?
• Too low mains voltage
• Motor is wrongly connected
• Reduce feed
Disconnect immediately and have it
checked by authorized personnel
• Have it checked by qualified
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
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