Troubleshooting; Area Of Application; A.1 Designated Use; A.2 Environmental Conditions (In Accordance With Din En 61010-1) - Renfert Demco Mode D'emploi

6. Troubleshooting

Fault
Motor does not rotate. • No mains power.
No lights
Spindle does not
rotate when motor is
running.
Mandrel remains sta-
tionary during opera-
tion
Noisy spindle unit.
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
operator at all times.
A. Area of application

A.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.
EN
Cause
• No mains power.
• Lights faulty
• Transformer faulty
• Mandrel not installed.
• Lever not in position "A"
• Mandrel damaged.
• Collet dirty.
• Collet rusty or worn.
• Collet not completely screwed
in.
• Drive belt cracked.
• Belt too loose.
• Spindle bearings faulty
Owner's Manual
• Plug in power plug.
• Check plug.
• Check fuses.
• Plug in power plug.
• Check plug.
• Check fuses.
• Replace bulbs
• Send machine for repair
• Install mandrel (see Chap. 2.2)
• Move lever to position "A" (Figure 3).
• Check collet, replace if necessary.
• Clean collet and apply a light film of oil (see
Chap. 3.1)
• Replace collet
• Screw collet in completely while lever is in posi-
tion "B" (Figure 5).
• Replace drive belt (see Chap. 3.2)
• Adjust belt tension (see Chap. 3.3).
• Send spindle in for repair.
A.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]
*),
• at a maximum relative humidity of 80% at 31ºC
[87.8ºF], with a linear decrease to 50% relative
humidity 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].
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Remedy