Optimum OptiGrind GH 10T User Manual

Malfunctions
Version 1.1.4 - 2022-09-2324 Originalbetriebsanleitung
GH 10T | GH 15T
EN
GH10T_GH15T_GB_4-1.fm
5 Malfunctions
Malfunction Cause/possible effects Solution
Motor does not turn on • Micro fuse 1F1 defective at the freezer
plug connection.
 Schaltplan - Wir-
ing diagram - GH10T , GH15T on
page 38
• Cover item 51 not completely closed,
micro switch on GH15T item 24 is not
pressed.
• Carbon brushes item 49 worn
• Unit not cleaned of grinding dust.
• Motor defective
• Determine the cause, where appro-
priate have this checked by a trained
specialist.
Replace micro fuse.
• Close cover completely, check micro
switch.
• Replace carbon brushes
•
 Inspection and maintenance on
page 25
• Replace motor
Drills become eccentric, tips
no longer true.
Drills cannot be centred; after
sharpening, the tip is not
centred.
Incorrect drill grinding,
geometry not true.
No back cut on the drill; the
drill does not cut after
regrinding.
Drills are not back cut.
Appliance is grinding the drills
wrongly, clearance angle
incorrect.
• Incorrect operation and maintenance
of the appliance
• Drill diameter adjusting screw not set
correctly.
• Drill stop edge and clamping head
group stop surface neglected during
setting.
• Turn the chuck in the housing
through 180° and grind both sides of
the drill until a grinding noise is no
longer audible.
• Drill is not clamped correctly in the
chuck.
• Drill is moved by contact pressure
while grinding in the chuck, because
the grinding disk is worn
• The chuck has not been inserted
correctly in the clamping head group.
• Set the drill diameter correctly. Con-
sider the backlash of the thread in
the adjusting screw. The smaller the
drill, the more difficult the setting.
• Observe the required stop areas
while setting, the cutting edge of the
drill and stop area at the clamping
head group.
• Flying sparks detectable with HSS
spiral drills? No, grinding disk is
worn and must be replaced.
Clamping head group cannot
be placed in its housing, or
only with difficulty.
• New appliance, new parts, as yet no
wear on the surfaces.
• Surfaces covered with grinding dust.
• Reduce and round the diameter of
the housing or the clamping head
group bevel with 120 grain emery
cloth.
• Clean the surfaces, use some oil.
The wear of the steel disk,
coated with cubic crystalline
boron nitride is too great.
• Regrinding of spiral drills with hard
metal tips (hammer drills). The life of
the grinding disk with HSS spiral drills
is much higher.
• Use of an SDC grinding wheel, see
spare parts

Optimum OptiGrind GH 10T Specifications

General

Brand	Optimum
Model	OptiGrind GH 10T
Category	Grinder
Language	English