Malfunctions - Optimum OPTi drill D 17Pro Operating Manual

8

Malfunctions

Malfunction
Motor is hot
Noise during work.
Bit „burnt"
Drill point runs off, drilled hole
is not circular.
Drill is running non-round or
shaking
The drill chuck or the taper
mandrel cannot be inserted.
Motor does not start.
Motor is overheating and
there is no power.
Precision of the work deficient
Drilling spindle sleeve does
not return to its initial position
Digital readout does not
match the spindle sleeve
travel
Digital speed does not match
the speed table
EN
D17 Pro│D23 Pro│D26 Pro│D33 Pro
74
Cause/
possible effects
• Wrong electrical connection of 400V
machines
• Spindle runs dry.
• Tool blunt or incorrectly clamped.

• Pulley on the motor has come
loose.
• Incorrect speed
• Chips are not coming out of the
drilled hole.
• Blunt drill bit.
• Operating without cooling agent.
• Hard material or length of the cut-
ting spirals/or angles on the tool are
unequal
• Drill bit is bent.
• Drill bit is bent.
• Bearings worn down in the spindle
head.
• Drill is not correctly clamped.
• Drill chuck defective
• Dirt, grease or oil on the taper
inside of the drill chuck or on the
taper surface of the drill spindle
• Motor is wrongly connected
• Defective fuse.
• Motor overloaded?
• Too low mains voltage
• Motor is wrongly connected
• Heavy and unbalanced or deformed
work-piece.
• Inexact horizontal position of the
work-piece holder.
• Spindle return spring
• Encoder (potentiometer) for drilling
depth electrical or mechanical
faulty.
• Deviations of ± 100 1 / min not
uncommon.
Translation of original instruction
Solution
•
• Grease spindle
• Use new tool and check tension
(fixed setting of the bit, drill chuck
and taper mandril)
• Check the fastening of the pulley,
tighten the fastening nut.
• Choose a different speed, exces-
sive feed.
• Retract the drill bit from the bore
hole more often.
• Sharpen the drill bit or insert new
drill bit.
• Use coolant.
• Use a new drill bit.
• Replace drill bit
• Have the bearings in the spindle
head replaced.
• Clamp the drill bit properly.
• Replace the drill bit chuck.
• Clean surfaces well.
• Keep surfaces free from grease.
• Have it checked by qualified per-
sonnel.
• Switch off immediately and have it
checked by qualified personnel
• Balance the piece statically and
secure without straining
• Adjust workpiece-holder

• „Img. 6-2: Spindle return
spring" on page 48
• Check encoder (potentiometer),
replace if necessary.
• not possible
Version 1.0.3 - 2022-04-06
Malfunctions