OPTIMUM
M A S C H I N E N - G E R M A N Y
Malfunctions
Version 1.0.2 2017-04-11
Page 42
Original operating instructions
RD3
GB
7
Malfunctions
Malfunction
Cause/
possible effects
Solution
Spindle does not turn
•
Motor circuit breaker has tripped or
is defective.
•
Supply voltage too low, possibly
missing a phase.
•
Protective cover V-belt opened.
•
Motor defective.
•
Check motor protective switch or
switch it on again if applicable.
•
Check supply tension
•
Close the protective cover.
•
Check motor and replace it if
required.
Motor hums or malfunction
•
A phase of the supply connection is
missing.
•
DC brake active.
•
Overheated motor
•
Check electrical supply connection
through specialists.
•
Check DC brake through special-
ists.
•
Note intermittent load of the drive.
Spindle power too low
•
Step switch of drive motor in star
connection.
•
Provide step switch of drive motor
star-delta connection to delta con-
nection.
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
It is not possible to insert the
drill chuck or the taper man-
drel
•
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
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