Troubleshooting - Optimum B 24 H Operating Manual

OPTIMUM
M A S C H I N E N - G E R M A N Y
8

Troubleshooting

Problem
FI protective switch on
machines with frequency
converter triggers.
Motor gets hot
Noise during working
Bit „burnt"
Bit tip moves, bore hole
is not circular
Defective bit
Bit running off-centre or
„hoping"
Impossible to introduce
drill chuck or morse taper
Motor does not start
Overheating of motor and
lack of power
Precision of the work
deficient
Drill spindle does not
return to its initial position
Impossible to move the
drill spindle sleeve down-
wards.
Page 76
Cause / possible effects
• an unusual FI protective switch is
being used
• wrong power supply
• Spindle turning dry
• Tool blunt or is being incorrectly
secured
• bit speed too high/too much feed
• The chips have not been remo-
ved from the bore hole
• Bit dull
• no or too little cooling
• hard part on the work piece
• Unequal length of the cutting spi-
ral or angles in the bit.
• Bit deformed
• No support used.
• Bit deformed
• spindle bearing worn out
• Bit badly secured.
• Drill chuck defective.
• There is dirt, grease or oil on the
inner conical surface of the drill
chuck or on the conical surface of
the drill spindle
• motor badly connected
• Defective fuse
• motor overloaded
• Insufficient mains voltage
• motor badly connected
• Heavy and unbalanced or twi-
sted work piece
• Failure of spindle return spring
• Locking bolt inserted
• Locking bolt inserted
• Drill depth adjustment no
released
Troubleshooting Bench drill and upright drill B24H ; B28H (B) (Vario) ; Version 2.1.7
Troubleshooting
Solution

• „Power supply" on page 33
• Grease spindle (only in the dis-
mantled condition possible)
• Use new tool and check secu-
ring (fixed setting of the bit, drill
chuck and morse taper).
• Select another speed
• Extract the bit more often
• Sharpen or replace bit
• Use coolant.
• Replace bit
• Use a wooden board and secure
it to the work piece
• Replace bit
• replace spindle bearing
• Secure the bit properly
• Replace the drill chuck
• Clean surfaces well
• Keep surfaces fat free
• Have it checked by authorized
personnel
• Reduce feed, disconnect if
necessary
• Have it checked by authorized
personnel
• Balance work piece statically and
secure it without straining
• Adjust work piece holder
• Check spindle return spring and
replace if necessary
• Remove locking bolt
• Pull out the locking bolt
• Release drill depth adjustment
21 / 07 / 2014