Lagler HUMMEL User guide

Operation,
Maintenance, Safety
Operating instructions for the belt sanding machine
BELT SANDING MACHINE HUMMEL
HUMMEL
CAN
GB
NZ
USA
AUS
IRL

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HUMMEL - ASSEMBLIES
Cable support
On/Off switch
Switch box
Fig. 1 Assemblies of the HUMMEL belt sanding machine
Lowering lever
Handle
Dust bag
Safety guard
Side cover
Lateral wheel
Drive motor
Bracket
Belt guard
Bumper felt
Operating lever,
drive unit

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1. Introduction...................................................................................................................................................................4
1.1 Features of the machine..............................................................................................................................................4
1.2 Description of the machine.........................................................................................................................................4
1.3 Intended use of the machine ......................................................................................................................................4
1.4 Danger warnings..........................................................................................................................................................5
1.5 Safety devices..............................................................................................................................................................6
2. Technical data ..............................................................................................................................................................6
3. Commissioning..............................................................................................................................................................8
3.1 Preparing the machine for operation.........................................................................................................................8
3.2 Starting the machine..................................................................................................................................................10
3.3 Switching off the machine.........................................................................................................................................10
4. Working with the HUMMEL.......................................................................................................................................11
4.1 Application tips...........................................................................................................................................................11
4.2 Changing the sanding belt.........................................................................................................................................12
4.3 Regulating the sanding drum pressure....................................................................................................................13
4.4 Emptying the dust bag................................................................................................................................................13
5. Transport and storage................................................................................................................................................14
5.1 Dismantling the machine...........................................................................................................................................14
5.2 Assembly after transportation..................................................................................................................................15
5.3 Storage........................................................................................................................................................................15
6. Maintenance...............................................................................................................................................................16
6.1 Cleaning and care instructions.................................................................................................................................16
6.2 Lubrication..................................................................................................................................................................18
6.3 Checking sanding belt regulation.............................................................................................................................18
6.4 Checking the machine setting...................................................................................................................................19
6.5 Checking the dust pick-up.........................................................................................................................................21
6.6 Replacement of wearing parts..................................................................................................................................21
6.7 Regular maintenance and testing in accordance with accident prevention regulations..................................26
7. Troubleshooting..........................................................................................................................................................27
8. General safety remarks .............................................................................................................................................28
9. Circuit diagram...........................................................................................................................................................31
10. Spare parts..................................................................................................................................................................34
11. Service passport ........................................................................................................................................................47
12. Declaration of conformity..........................................................................................................................................48
CONTENTS

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The belt sanding machine HUMMEL is only us-
ablefordryprocessing.Never useyourHUMMEL
for wet processing (Danger!).
INTRODUCTION
1.1 FEATURES OF THE MACHINE
Fig.1(page2)showsthemostimportantassemblieswhichmakeup
the HUMMEL. We recommend that you take some time to become
familiar with the machine.
1.2 DESCRIPTION OF THE MACHINE
The HUMMEL belt sanding machine operates with a contact sand-
ing drum featuring a specially profiled rubber coating. The belt
tensioningfixturewithintegratedautomaticbeltguidanceislocated
vertically above the sanding drum. The work zone is covered by
the machine housing and detachable side cover. On the machine
housing,the electricmotor is fixedin a motorbearing bracket. The
plugfor connectionto the mainsis located atthe switch boxof the
motor. The motor switch with the switch positions START / WORK-
ING and TEST is located at the switch box. On the left under the
belt guard is the belt drive unit. The machine is moved by means of
a steering wheel at the back and two lateral wheels. Two handles
are attached to the guide tube, where the drum lowering lever is
also located and the cables and dust bag are attached.
The HUMMEL belt sanding machine is intended for dry use only.
Never attempt to use the HUMMEL for any wet process (risk of
fatal accidents)!
1.3 INTENDED USE OF THE MACHINE
TheHUMMELbeltsandingmachineissuitableforsandingwooden
and cork floors, plastic skating rinks and tartan running tracks. A
specially equipped version of the machine can be used to sand
sheet metal surfaces.
Any application other than that described here is inadmissible
without the consent of the manufacturer. Never use for wet sand-
ing processes!
Introduction
1
You are now the owner of a high-quality
product from LÄGLER. We wish you every
success with the HUMMEL. This machine
has been manufactured using state-of-
the-art production techniques. All LÄGLER
productsaresubjectedto thoroughcontrols
before they leave the factory.
Please read right through these operat-
ing instructions before working with the
HUMMEL for the first time. The operating
instructions contain important information
relating to working safety and will answer
many of your questions, permitting you to
work confidently and safely with the ma-
chine.Ifyourequireinformationwhichisnot
provided in these instructions, refer to your
sanding manual or consult our Customer
ServicesDepartment,whichwillbepleased
toadviseyou. Ourfullytrainedand qualified
servicetechniciansarehighly familiarwith
theHUMMELand willbeabletoprovideany
assistance you may need.

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INTRODUCTION
1.4 DANGER WARNINGS
Read through the danger warnings carefully and instruct your
employees or colleagues accordingly. Failure to comply with this
requirement could result in danger of injury.
In order to avoid injury caused by the sanding belt, the machine
may never be switched on when tilted backward.
Use only tools, accessories and spares intended for the HUMMEL
supplied by LÄGLER. No warranty cover exists for parts sourced
from other manufacturers! Use of other parts can result in dam-
age to the machine, to the floor you are sanding, or injury to the
machine operator.
Ensure that the dust bag is correctly attached in order to prevent
theunnecessaryreleaseofdust.Thiscontaminatestheenvironment
and constitutes a health hazard to operating personnel.
Incorrect transportation will result in damage to the equipment.
To avoid fire or explosive damage, always remove the dust bag
from the machine following sanding and empty the contents into
a non-combustible container! Seal this container with a non-
combustible cover and always store both the container and the
dust bag in the open!
Keep well away from sources of fire.
Do not smoke when there is dust in the atmosphere (e.g. while
working with the machine or emptying out the dust) this could
cause a dust explosion.
The mains connection cable must be kept out of the work area in
order to prevent mechanical or electrical damage.
Inordertopreventanychanceofthemachinebeingunintentionally
started up, the power supply must be cut off when the machine is
switched off by unplugging from the mains!
To protect the equipment against current faults, we advise using a
DI safety plug (Art. no. in Section 10).
Whentheunitisoperatedcorrectly,theprescribeddustlimitvalues
areadheredto.Whenemptyingthedustbag,werecommendwear-
ing respiratory protection mask P3 (Art. no. in Section 10).
1

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Note:
The motor data mentioned above relates to ma-
chines used in the Federal Republic of Germany.
Different data may apply to exported machines.
This is indicated on the motor rating plate.
Note on noise emission:
The specified values are emission values and
are not required to constitute safe workplace
levels.Althoughacorrelationdoesexistbetween
emission and imission levels, it is not possible
to conclude on this basis whether additional
precautionary measures are necessary. Factors
which influence the current imission level ex-
isting at the workplace include the duration of
exposure, the character of the workroom, other
noise sources such as the number of machines
and other adjacent machining processes. The
admissibleworkplace valuescan alsovary from
onecountrytoanother. However, thisinformation
is provided in order to enable the user to better
estimate the level of danger and risk.
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TECHNICAL DATA
Manufacturer.................................................... Eugen LÄGLER GmbH
Machine type....................................................Belt sanding machine
Serial number.............................................................see rating plate
Year of construction...................................................see rating plate
Motor type.......................................................single-phase AC motor
Voltage ..........................................................................................230 V
Frequency.....................................................................................50 Hz
Output..........................................................................................2.2 kW
Fusing..............................................................................................16 A
Insulation class...................................................................................B
Protection rating...........................................................................IP 54
Safety devices.......................................................no-voltage release
..................................................................thermal switch as overload
..........................................................................protection in the motor
Starting capacitor........................................................................60 µF
Operating capacitor.....................................................................40 µF
Drum diameter..........................................................175.5 mm (6 7/8“)
Drum width...................................................................200 mm (7 7/8”)
Drum speed.............................................................................2400 rpm
Dimension of the sanding belt................200 x 750 ( 7 7/8” x 29 1/2”)
Length.............................................................................1040 mm (41“)
Width................................................................................360 mm (14“)
Height.......................................................................1000 mm (39 3/8“)
Weight of the machining housing..................................41 kg (90 lbs)
Weight of the motor........................................................34 kg (75 lbs)
Weight of the guide tube....................................................4 kg (9 lbs)
Overall weight ...............................................................79 kg (174 lbs)
Dust emission at the workplace............ < 2 mg/m³ (0.024 gr./cu.yd.)
Workplace-related noise emission values...........................76 dB(A)
Technical data
1.5 SAFETY DEVICES
The following parts of the machine are safety devices and must
accordingly be kept in perfect working order:
Sealing felt = Dust shield
Side cover = Dust shield, sanding belt protection
Machine housing = Sanding belt protection
Belt guard = V-belt protection
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Neverusethesandingmachine for anytype
of wet operation!
When the machine is switched on, a se-
rious residual risk still remains despite
the presence of extensive safety devices.
Neverreachinto rotatingtoolsandmachine
parts!
TECHNICAL DATA
Intended applications
Sandingwoodenandcorkfloors,plasticskatingrings,withspecial
version also machining of sheet metal surfaces.
Basic equipment
Machinereadyforoperation,dustbag,MultiClipfordustbagfixture,
cablesupport, extensioncable 3x 2.5sq. mm- 10m long,O-ring as
a strain relief device, operating instructions and safety remarks,
toolkitcompletewithclosedmouthwrenchsize13/10,open-mouth
wrenchsize17,hexagonalsocketwrenchsize6and5,settinggauge,
box wrench and respiratory protection mask P3.
Optional equipment
Carrying handle, TransCart, pocket for ear plugs, DI safety plug,
safety belt.
Wearing parts
To ensure that the machine works safely and to maximum effect,
pleasecheckthestatusofthewearingpartslistedbelowatregular
intervals:
• Replace extension cable if damaged
• Replace motor cable if damaged
• Replace sealing felt if worn or damaged
• Replace MultiClip if damaged
• Replace V-belt if worn
• Replace sanding drum if worn or damaged (after daily use, ex-
change every 1 - 2 years)
• Replacethetensioningrollerifwornordamaged(afterdailyuse,
exchange every 1 - 2 years)
• Replace side cover if damaged
• Replace dust bag if worn or damaged
• Replace O-ring used as a strain relief if damaged
• Replace back wheel if worn or damaged
• Replace lateral wheels if worn or damaged
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Therelevantarticlenumbers oftheoptional
accessoriesandwearing partsareprovided
in the spare parts lists in Section 10.

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COMMISSIONING
Commissioning
This section describes the procedure for commissioning the
HUMMELon site.In orderto excludethe possibilityof damageand
malfunctions, it is essential to proceed in the sequence outlined
below.
Before working with the machine for the first time, operating staff
must be adequately instructed!
3.1 PREPARING THE MACHINE FOR OPERATION
1Unpack the machine carefully. The bottom part of the sup-
plied transport crate makes a useful container for storage or
transportation of the machine (see Section 5, Transport and
storage). Please ensure that the packaging materials are
responsibly disposed of.
2Press the lowering lever downwards, insert the guide tube
into the opening in the housing and at the same time place
the top part of the lowering rod linkage into the bottom part
of the rod linkage in the machine housing (Fig. 2).
3Tighten the wing screw and the wing nut (Figs. 3 and 4).
4Liftthesandingdrumoffthefloorbyturningtheloweringlever
upwards.
5Mount the cable support onto the provided bracket at the top
of the guide tube (Fig. 5)
6Fasten the dust bag firmly using the cord and the MultiClip at
the end of the guide tube, ensuring when mounting that the
opening of the guide tube is not closed (Fig. 6).
7Releasethecoverlockandremovethesidecoverontheright
of the machine housing (Fig. 7).
8To engage the sanding belt, pull the opposite lever upwards.
This will lower the tensioning roller (Fig. 7).
Fig. 2 Wheninsertingtheguidetube,makesurethatthe
rod linkage of the lowering mechanism feeds in
correctly!
Fig. 3 After inserting the guide tube, carefully tighten
the wing screw and …
Fig. 4 … the wing nuts.
Fig. 5 Suspend the cable support into the provided
hole.
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PREPARING THE MACHINE
9Position the sanding belt on the tensioning roller and push it
over the sanding drum (Fig. 8).
10 Position the sanding belt so that it evenly covers the sanding
drum (Fig. 9).
11 To tension the sanding belt, press the tensioning lever down-
wards (Fig. 10).
12 Connect the motor cable plug to the extension cable.
13 Plugintheextensioncabletoaadequatelyfused 230 V mains
socket with PE contacts.
14 Before closing the housing opening by replacing the side
cover, check the precise tracking of the sanding belt. While
doingso,thesandingdrum mustberaisedoffthefloor!Switch
onthemachineforaround2secondswiththeswitchposition
-TEST- and check the sanding belt tracking.
Should the belt require readjustment, please check Section
6.3, Checking sanding belt regulation.
15 Close the housing opening with the side cover.
The machine is now ready for operation.
Before working with the machine for the first time, operating staff
must be adequately instructed!
Fig. 6 Mount the dust bag without creasing using the
cord and MultiClip.
Fig. 7 Release the cover lock, remove the side cover
and lower the tensioning roller by pulling up the
lever.
Fig. 8 Mount the sanding belt.
Fig. 9 Pushthesandingbeltfarenoughoverthesanding
drum and tensioning roller so that the sanding
drum is fully covered by the belt.
ATTENTION!
Never switch on the motor before tensioning the sanding belt!
Never switch on the motor unless the sanding drum is raised
off the floor!
ATTENTION!
Never reach into the area of the belt while it is running. During
the test run, ensure that no objects randomly positioned in the
vicinity can be picked up by the sanding belt. This could result
in serious injury or damage to the machine!
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STARTING THE MACHINE
Fig. 10 Tension thesandingbeltbyloweringthe tension-
ing lever.
3.2 STARTING THE MACHINE
Oncethepreparatorystageshavebeencompleted,themachinecan
be started. To start the motor, the switch must be held for around
2 seconds in the -START- position until the motor has reached full
speed.
Remaining for too long in the -START- switch position shortens the
service life of the starting capacitor! Once the motor has reached
its full speed, release the switch button. The switch will then auto-
matically move to the -WORKING- position.
If the motor should ever be difficult to start in extremely cold con-
ditions, the V-belt tension should be relaxed by loosening the eye
bolt.Lowerbelttensionwillallowthe motor to startupmoreeasily.
Once the motor is up to temperature, remember to retension the
belts using the eye bolt.
3.3 SWITCHING OFF THE MACHINE
To switch off, raise the sanding drum off the floor by actuating the
lowering lever and turn the switch button to the -0- position. Wait
until the sanding drum comes to a standstill before replacing the
machine down onto the sanding drum. Never allow the machine to
run unattended and always pull the mains plug out of the socket
once you have finished working.
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ATTENTION!
Never switch on the motor before tensioning the sanding belt!
Never switch on the motor unless the sanding drum is raised
off the floor!
Neverallowthemachine torununattended,and alwayspullthe
mains plug out of the socket once you have finished working!