OPTIMUM
MASCHINEN - GERMANY
Malfunctions
Version 2.0.2 2014-11-04 Page 73Original operating instructions
B17Pro | B23Pro | B26Pro | B33Pro GB
8 Malfunctions
8.1 Malfunctions on the drilling machine
Malfunction
Cause/
possible effects
Solution
Release of the FI protected
switch
• an unusual
FI protective switch is being used
• "Power supply“ on page 29
Noise during work. • Spindle turning dry
• Tool blunt or incorrectly secured
• Grease spindle
• Use new tool and check securing
(fixed setting of the bit, bit holder and
chuck).
Drill bit "burnt“ • Incorrect speed
• The filings have not been removed
from the bore hole
• Blunt drill bit.
• Operating without cooling agent
• Select another rate, feed too high
• Retract the drill bit from the bore hole
more often.
• Sharpen the drill bit or insert new drill
bit.
• Use cooling agent
Drill point runs off, drilled hole
is not circular.
• Hard fibre in wood or length of the
cutting twist or the drill bit is uneven.
• Drill bit is bent.
• Use a new drill bit.
Drill bit defective. • No base / support used. • Place a piece of wood underneath
the workpiece and fasten this to the
workpiece.
Drill bit runs unround or wob-
bles.
• Drill bit is bent.
• Worn bearing on boring head.
• Drill is not correctly clamped.
• Drill chuck defective
• Replace drill bit
• Have the bearing on the boring head
replaced.
• Set the correct tension to the drill bit.
• Exchange the drill chuck.
The drill chuck or the taper
mandril cannot be inserted.
• Dirt, grease or oil on the taper inside
of the drill chuck or on the taper sur-
face of the drill spindle
• Clean the surfaces accurately
• Keep surfaces free of grease
Motor does not start • Motor is wrongly connected
• Defective fuse
• Have it checked by authorised per-
sonnel.
Motor is overheating and there
is no power
• Motor overloaded
• Too low mains voltage
• Motor is wrongly connected
• Disconnect immediately and have
the equipment checked by a trained
specialist
Precision of the work deficient • Heavy and unbalanced or deformed
part
• Inexact horizontal position of the part
holder
• Balance the piece statically and
secure without straining
• Adjust part-holder
Drilling spindle sleeve does not
return to its initial position
• Spindle return spring • “Spindle return spring“ on page 45
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