3B SCIENTIFIC PHYSICS 1021806 User manual

3B SCIENTIFIC® PHYSICS
1
Experiment Motor with Gearbox 1021806
Instruction Sheet
11/18 TB
1 Crank handle
2 Chuck
3 Locking ring
4 Torque setting
5 Housing
6 4-mm safety sockets
7 Knurled thumb screw
8 Stand rod
9 Belt pulley
10 Toroidal sealing ring
1. Safety instructions
Risk of injury! The experiment motor
is designed for open experiment
setups and, naturally for that reason,
cannot be equipped directly with
mounted safety mechanisms to
protect against flying parts or with shielding for the
rotating components. Consequently the following
safety instructions must be read thoroughly and
strictly obeyed while operating the motor!
 Long hair, loose
clothing as well
as jewelry could
get caught in
the rotating
parts and result in injury. To avoid this hazard
persons with long hair should wear a hair net.
 Inappropriate clothing or jewelry should be re-
moved.
When working with the belt pulley (9)
and drive belts (10), an additional
danger exists, e.g..a finger could get
caught between the belt and the
pulley.
 The safety instructions attached to the motor
must remain visible and should not in any way
be visibly obscured by the experiment setup.
Should it prove impossible to comply with this
requirement, the appropriate warnings must be
attached to the experiment stand.
 Proper use in compliance with directives:
The motor must be mounted on a stable sur-
face (stable bench, solid stand equipment or if
necessary a bench clamp). Use as a hand-held
drill or power screwdriver is inadmissible due to
the grip lacking the appropriate ergonomic form
(machine guidelines 98/37/EC). For the sake of
operator safety, a protective wall is erected to
effectively shield observers from any flying ob-
jects which might be unleashed when operating
the machine at high speeds. This wall is made
of safety glass (e.g. plexiglass, polycarbonate,
etc.).

2
 Directly attaching light (approx. 0.5 kg maxi-
mum) centrifugal devices into the chuck is al-
lowed, e.g. flattening ring or flywheel regulator if
these components are not out-of-balance. Oth-
erwise the driving must be achieved using the
belt pulley provided. At any rate the corre-
sponding operating instructions included must
be complied with.
 The motor can also be operated as a generator.
To do this, the device is mounted onto a bench
using a bench clamp, for example, and the
crank handle is inserted into the chuck. In this
operating mode it is prohibited to have a power
supply connected to the terminal sockets (7).
Instead, an incandescent lamp or a measuring
instrument should be connected.
 The mains power supply (or similar) used to
power the motor must be set up outside the
danger zone (for example behind a protective
wall). The use of a variable power supply is
recommended so that the experiments can al-
ways be started at a lower speed setting and
then increased. The maximum permissible volt-
age (refer to rating plate) may not be exceeded.
 In the case where the motor comes to an unex-
pected standstill (e.g. power cut), immediately
disconnect all supply lines from the mains pow-
er supply unit (or the power source being used),
in order to avoid any unintended restart.
 The motor is equipped with a torque limiting
mechanism (4). Experiments should always be
started at the lowest possible setting (setting "1"
on the scale, which is designated with an arrow
and the letter "M"). If the torque is not sufficient
the power supply must be switched off and the
next highest setting selected.
 Before starting the experiment please check
once again for possible assembly or connection
errors (loose screws or chuck, etc.) or visibly
defective components.
 During operation the experiment setup is to be
constantly observed and immediately switched
off should the slightest irregularity arise (change
in noise volume, increasing vibration).
2. Technical data
Nominal voltage U0: 1.5 - 18 V DC (see rating
plate)
No-load current: approx. 1 - 2 A, maximum
permissible current: 5 A
(maximum 5 min.)
Rotation direction: clockwise from the motor‘s
perspective when connec-
tion of "+" terminal is to red
and "–" is to the blue sock-
et
No-load speed n0 at U0: see rating plate
Chuck: 1 - 10 mm
Continuous noise level
at 1 m distance: 70 dB(A).
In DC motors there is practically a linear relation-
ship between the supply voltage and speed. For
that reason the speed for any given voltage can
easily be deduced from the data on the rating plate:
n = n0 U / U0.
3. Operation
With the experiment motor you can perform exper-
iments on centrifugal force (additional equipment
required) and power generation (generator mode).
 Using the stand rod the motor can be secured
in place either in a bench clamp, a tripod or a
coupling sleeve. Alternatively, it is also possible
to mount the motor on plates using a drill hole
(D = 8 mm) as, for example, with the mount
(1002655). Furthermore it can be secured on a
lab bench using a bench clamp. In this case the
upper side should rest on the table top.
 To lock the shaft into the chuck the locking ring
(3) is held securely while the ring on the chuck
(2) is turned. It is particularly importantly espe-
cially with small diameters to make sure that the
shaft is seated firmly in all three jaws of the
chuck and is not bent or angled.
 The torque setting is set with the ring (4), by
turning from one setting to the next. Intermedi-
ate settings are not allowed.
 The motor is designed for operation in short
experiments and not for continuous operation.
In particular when operating at higher currents
starting around 2 A it is important to check the
housing temperature at intervals of every 5 - 10
min. If the temperature of the housing becomes
"uncomfortably" hot – i.e. higher than normal
body temperature, than a break should be tak-
en.
4. Maintenance
 The experiment motor is basically maintenance-
free. For cleaning purposes it can be wiped off
with a damp cloth. Solvents should not be used.
Furthermore, under no circumstances should
the device be submerged in water.

3B Scientific GmbH ▪ Ludwig-Erhard-Str. 20 • 20459 Hamburg ▪ Germany ▪ www.3bscientific.com
Technical amendments are possible
© Copyright 2015 3B Scientific GmbH
5. Disposal
 The packaging should be disposed of at local
recycling points.

Should you need to
dispose of the equip-
ment itself, never
throw it away in normal
domestic waste. Local
regulations for the dis-
posal of electrical
equipment will apply.
 Do not dispose of the battery in the regular
household garbage. Follow the local regula-
tions (In Germany: BattG; EU: 2006/66/EG).
6. EC conformity declaration
In accordance with the directives set forth in the EC
guidelines 98/37/EG and 89/336/EWG, the compa-
ny 3B Scientific GmbH hereby guarantees that the
experimental motor, cat. no. 1002663 / U10375,
complies with essential safety requirements of the
above-mentioned guidelines and conforms to the
following standards: EN 55014-1 and EN 55014-2.
Hamburg, 9 Feb. 2004
Manfred Kurland
3B Scientific GmbH, Rudorffweg 8, 21031 Ham-
burg,
Germany