Demco E96-230 User manual

Rev. 0907 A
Demco
Model E96-230
Manufactured by:
CMP Industries LLC • 413 N. Pearl St. • Albany, NY 12207 / USA
Bedienungsanleitung
Instruction manual • Mode d´emploi
Istruzioni d’uso • Instrucciones para el servicio
Инструкция по эксплуатации

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Demco High-Speed Grinder
Model E96-230
NGLISH
Introduction
The Demco E96 high speed grinder is a compact pre
cision grinder for use in dental laboratories.
It is used for grinding or cutting dental casts and ma
terials.
The grinding body with mandrel is securely fastened
in a collet.
A lever system in the spindle is used to stop a
quick stop coupling, open the collet and replace the
mandrel.
The work area is illuminated by two high intensity
bulbs.
A tinted eye protection shield in front of the work area
protects the operator from injury.
The belt and pulleys are protected by a cover to
protect the operator from contact with them during
operation.
Observe the information on dangers and
the warnings in the section „Owner‘s Manu-
al“.
Instruct the user with this manual on the
area of operation, the possible dangers
during operation and the operation of the
machine.
This instruction manual must be accessible to the ope
rator at all times.
For more information see the section „Owner‘s Ma
nual“
Symbols
The following symbols are used in this manual and on
the machine:
Danger
Danger of injury
lectrical power
Danger of electric shock
Caution
If this instruction is not observed the ma-
chine may be damaged
Note
Gives useful information that makes opera-
tion of the machine easier.
Disconnect the machine from mains power
and remove the plug before opening it.
Wear safety glasses
Danger
Danger of injury to hand.
Other symbols are explained as they are used.
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Content
Introduction ...................................................................................................... 7
Symbols ............................................................................................................... 7
Instructions for operator
1. Installation and operation ..................................................... 8
2. Operation ................................................................................................. 8
2.1 Controls .............................................................................................. 8
2.2 Replacing mandrels ............................................................... 8
2.3 Adjusting collet ............................................................................ 8
2.4 Setting spindle speed ........................................................... 8
3. Cleaning and maintenance ................................................ 8
3.1 Cleaning collet ............................................................................. 8
3.2 Drive belt replacement ........................................................ 9
3.3 Tensioning belt ............................................................................ 9
3.4 Replacing bulbs ......................................................................... 9
3.5 Replacing fuses ......................................................................... 9
4. Spare parts ............................................................................................ 9
5. Scope of delivery ............................................................................ 9
6. Troubleshooting ............................................................................ 10
Owner‘s Manual
A. Area of application ..................................................................... 11
A.1 Designated use ....................................................................... 11
A.2 Environmental conditions (in accordance with
DIN EN 61010-1) ................................................................... 11
B. Dangers and warnings ......................................................... 11
C. Approved persons ...................................................................... 11
D. Preparing for operation ........................................................ 11
E. Repair ........................................................................................................ 12
F. Specifications ...................................................................................12
G. Limitation of liability .................................................................. 12
Original

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1. Installation and operation
1. Install the machine on strong, level workbench.
2. Makes sure that the mains voltage conforms to the
voltage printed on the grinder name plate.
3. Adjust the safety shield for maximum eye protec
tion.
4. Set both switches to the “OFF“ position.
5. Plug in power plug.
The Demco high speed grinder is now ready for ope
ration.
2. Operation
2 1 Controls
(See Figure 1 and Figure 2)
A Lever (coupling, brake, clamping lever)
B Motor switch
C Light switch
D Collet
E Safety shield
F1 Motor fuse (2 pieces)
F2 Light fuse
2 2 Replacing mandrels
Set motor switch to “OFF“.
Move lever slowly and smoothly from position “A“
(Figure 3) to position “B“ (Figure 4) to uncouple and
brake the spindle and to open the collet.
Remove mandrel, install new mandrel.
Move lever back to position “A“ to close the collet.
Do not close the collet without a mandrel in
place, otherwise the spindle will bind.
Do not actuate brake too fast, otherwise the
item being ground may come loose from
the mandrel and cause unnecessary wear.
The spindle only runs if a mandrel or other
tool is positioned in the collet
2 3 Adjusting collet
If the mandrel is loose while the lever is in position “A“,
the collet must be readjusted.
Set motor switch to the “OFF“ position.
Move lever slowly and smoothly from position “A“
(Figure 3) to position “B“ (Figure 4) to uncouple and
brake the spindle and to open the collet.
Remove mandrel.
Remove collet key from the lever (Figure 5).
Rotate collet counterclockwise and remove it (Figu
re 6).
Insert the hex wrench through the spindle nose.
Change adjustment (Figure 7):
loosen: counterclockwise
tighten: clockwise
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Reinstall the collet and tighten it (the collet must be
screwed in completely while the lever is in position
“B”).
Replace collet key in lever.
Install mandrel and close collet again (lever in posi
tion “A“).
If the collet does not close in this step,
replacement of the collet may be necessary
(see spare parts list)
2 4 Setting spindle speed
The highest speed is always set on delivery
To set the grinder to low the speed:
Set motor switch to the “OFF“ position.
Unplug power cord.
Remove belt cover (Figure 8).
Loosen hex wrench (Figure 9).
Release belt tension by rotating the spindle (Figu
re 10).
Remove drive belt.
Install attached shorter low speed belt onto the outer
motor and spindle pulleys.
Tension drive belt by rotating the spindle. For the
correct belt tension see Chap. 3.3.
Tighten hex wrench.
Replace belt cover.
N V R operate machine without the belt
cover installed!
3. Cleaning and
maintenance
3 1 Cleaning collet
Daily:
remove collet, clean grit off and apply a light film of
oil.
Set motor switch to “OFF“ position.
Move lever to position “B“.
Remove the collet key from the lever (Figure 5).
Rotate collet counterclockwise and remove it
(Figure 6).
Clean and oil collet.
Replace collet and tighten it (the collet must be
screwed in completely while the lever is in position
“B”).
Apply a light film of oil to the collet only, do
not oil any other part of the spindle!
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Instructions for operator

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3 2 Drive belt replacement
Set motor switch to the “OFF“ position.
Pull out power plug.
Remove belt cover (Figure 8).
Loosen hex wrench (Figure 9).
Release tension by rotating the spindle (Figure 10).
Replace drive belt.
Tension drive belt by rotating the spindle. For the
correct belt tension see Chap. 3.3.
Tighten hex wrench again.
Replace belt cover.
N V R operate machine without the belt
cover installed!
Use only original drive belts!
3 3 Tensioning belt
Incorrect belt tension will cause premature
wear of the drive belt, the pulleys and the
bearings.
Loosen hex wrench (Figure 9).
Tension belt by rotating the spindle (Figure 10).
Adjust belt tension so the belt can be moved
approx. 8 mm up and down.
Check the belt tension after operating a
new belt for a short time, because new dri-
ve belts tend to stretch after operation
3 4 Replacing bulbs
Before replacing bulbs set the light switch
to the “OFF“ position.
Use only original bulbs, see spare parts list.
Installation of incorrect bulbs may destroy
the 24V transformer!
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3 5 Replacing fuses
Set motor switch to the “OFF“ position.
Pull out power plug.
Place grinder on one side.
Loosen screws and remove bottom plate (Figu
re 11).
Replace faulty fuse (Figure 12):
F1: motor fuses (2 pieces)
F2: light fuse
When replacing fuses, only use fuses with the same
rating as the original.
Refer to the “Technical Specifications” section.
N V R use fuses with a higher rating!
Reinstall the bottom plate.
4. Spare parts
See the attached spare parts list for the spare parts
numbers.
5. Scope of delivery
1 Demco high speed grinder
1 drive belt (short, for low speed)
1 instruction manual
1 spare parts list
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6. Troubleshooting
Fault Cause Remedy
Motor does not rotate. No mains power.• Plug in power plug.
Check plug.
Check fuses.
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No lights No mains power.• Plug in power plug.
Check plug.
Check fuses.
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Lights faulty• Replace bulbs•
Transformer faulty• Send machine for repair•
Spindle does not
rotate when motor is
running.
Mandrel not installed.• Install mandrel (see Chap. 2.2)•
Lever not in position “A“• Move lever to position “A“ (Figure 3).•
Mandrel damaged.• Check collet, replace if necessary.•
Collet dirty.• Clean collet and apply a light film of oil (see
Chap. 3.1)
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Collet rusty or worn.• Replace collet•
Collet not completely screwed
in.
• Screw collet in completely while lever is in posi
tion “B“ (Figure 5).
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Drive belt cracked.• Replace drive belt (see Chap. 3.2)•
Mandrel remains sta-
tionary during opera-
tion
Belt too loose.• Adjust belt tension (see Chap. 3.3).•
Noisy spindle unit. Spindle bearings faulty• Send spindle in for repair.•

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The following instructions are intended to help you as
the owner to use the machine safely in your laborato
ry.
Instruct the user with this manual on the
area of operation, the possible dangers
during operation and the operation of the
machine.
This instruction manual must be accessible to the ope
rator at all times.
A. Area of application
.1 Designated use
The Demco E96 high speed grinder is a compact
precision grinding machine for use in dental laborato
ries. It is used for grinding or cutting dental casts and
materials.
.2 Environmental conditions
(in accordance with DIN EN
61010-1)
The machine may be operated only:
inside,
up to an altitude of 2000 m above sea level,
at an ambient temperature of 5 40ºC [41 104ºF]
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at a maximum relative humidity of 80% at 31ºC
[87.8ºF], with a linear decrease to 50% relative hu
midity at 40ºC [104ºF] *),
by mains power if the voltage deviations are no greater
than 10% of the nominal value,
at pollution degree 2,
at overvoltage category II,
*) The machine can be used at a relative humidity up to 80% between
5 and 30ºC [41 86ºF]. At temperatures of 31 40ºC [87,8 104ºF]
the relative humidity must decrease proportionately to ensure
proper operation (e.g. at 35ºC [95ºF] = 65% relative humidity, at
40ºC [104ºF] = 50% relative humidity). The machine must not be
operated at temperatures above 40ºC [104ºF].
B. Dangers and warnings
For inside use only. The machine is de-
signed for use under dry conditions only
and must not be used or stored under wet
conditions.
The machine must be operated with a po-
wer cord conforming to national specifica-
tions only. The conversion to comply with
national regulations must be carried out by
an electrician.
Check that the information on the name
plate conforms to the local voltage.
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The power plug must be easily accessible.
The device must only be connected to
receptacles connected to the protective
conductor system.
Check connector lines and hoses (such
as power cord) regularly for damage (e.g.
kinks, cracks, porosity) or signs of ageing.
Machines with damaged connector lines,
hoses or other faults must not be operated.
Disconnect the machine from the mains
supply before any electrical work.
Never operate machine without supervisi-
on.
N V R operate machine without belt cover
installed!
Danger of injury by being caught in the
machine. Never work with loose long hair
or loose clothing.
Wear safety glasses when working with the
high-speed grinder!
Danger of hand injury by cutting an bur-
ning.
The rotating tools are sharp and the objects
can get hot.
Wear appropriate personal protective equip-
ment when working with materials that
could endanger health.
When working with the machine dust or
vapour that may endanger health may be
generated. Adjust the required extraction
system for the type of dust
Switch the machine off after work.
C. Approved persons
This product is specified for use by persons older than
14 years.
The machine must be operated by trained persons
only.
Repairs to electrical equipment that are not described
in this owner’s manual must be carried out by an elec
trician.
D. Preparing for operation
Before operation for the first time compare
the information on the name plate with the
local mains voltage.
The machine must be connected only to re-
ceptacles that are connected to the protec-
tive conductor system.
Owner‘s Manual

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. Repair
Repairs must be conducted by authorized technicians
only.
Repairs to electrical equipment that is not described
in this owner’s manual must be carried out by an elec
trician.
F. Specifications
Mains voltage: 230 V, 50/60 Hz, 1.5 A
Power consumption: 180 W
motor fuse: 2x 6,3 A (T)
Light fuse: 800 mA (T)
Speed: 20.000/24.000 1/min.
Cable length: 1 m
Spindle: shaft size 2.38 mm
Diameter of connection points for external extraction:
internal: 58 mm
external: 68 mm
Dimensions (WxHxD): 275 x 280 x 310 mm
Weight: approx. 14.3 kg
Lighting: 2x 12 V high intensity lights
All rights reserved
G. Limitation of liability
CMP Industries LLC will not accept any liability for
damages and warranty claims under the following
conditions:
• The product is used for purposes other than
those specified in the owner’s manual.
• The product is modified in any way – except for
the changes described in the owner’s manual.
• The product is repaired by persons who are not
authorised technicians or parts are not replaced
with original CMP Industries spare parts.
• The product is used in spite of obvious safety
defects or damage.
• The product is subject to mechanical impact or
is dropped.

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