Holzstar KSO 790 User manual

Instruction manual
Edge milling machine
KSO 790 230 V
KSO 790 400 V
KSO 790

2KSO 790 | Version 3.02
Imprint
Product identification
Edge milling machine Item number
KSO 790 400V 5900790
KSO 790 230V 5900791
Manufacturer
Stürmer Maschinen GmbH
Dr.-Robert-Pfleger-Str. 26
D-96103 Hallstadt
Fax: [phone]
E-Mail: [email protected]
Internet: www.holzstar.de
Indications regarding the operating instructions
Original instructions
Edition: 28.07.2020
Version: 3.02
Language: English
Author: FL
Indications regarding the copyright
Copyright © 2020 Stürmer Maschinen GmbH, Hallstadt,
Germany.
The contents of these operating instructions is the sole
property of the company Stürmer Maschinen GmbH.
Passing on as well as copying of this document, the use
and distribution of its content are prohibited if not explic-
itly permitted. Contraventions are liable to compensa-
tion.
Subject to technical modifications and error.
Contents
1 Introduction .................................................... 3
1.1 Copyright ............................................................ 3
1.2 Customer service................................................ 3
1.3 Limitation of liability............................................. 3
2 Safety .............................................................. 3
2.1 Symbol explanation ............................................ 3
2.2 Obligations of the operating company ................ 4
2.3 Qualification of personnel ................................... 5
2.4 Personal protective equipment ........................... 5
2.5 Safety signs on the Machine............................... 6
2.6 Safety devices .................................................... 6
2.7 Danger zones ..................................................... 6
2.8 Work space......................................................... 6
2.9 Regulations for safety and accident prevention..... 7
3 Intended Use................................................... 7
4 Technical Data ................................................ 8
4.1 Table .................................................................. 8
4.2 Type plate........................................................... 8
5 Transport, Packaging, Storage ..................... 8
5.1 Delivery and transport......................................... 8
5.2 Packaging ........................................................... 9
5.3 Storage ............................................................... 9
6 Description ..................................................... 9
7 Specification and standard equipment...... 10
8 Setting up and connection .......................... 10
8.1 Requirements for the installation site................ 10
8.2 Setting up the edge milling machine................. 10
8.3 Electrical connection......................................... 10
9 Commissioning ............................................ 11
9.1 Starting the machine......................................... 11
9.2 Basic operation ................................................. 11
9.3 Grinding ............................................................ 11
9.4 Adjustment and set-up work ............................. 12
10 Care, maintenance and repair................... 13
10.1 Cleaning after work......................................... 13
10.2 Regular checks............................................... 14
10.3 Maintenance and repair .................................. 15
11 Disposal instructions / recycling facilities......15
11.1 Decommission ................................................ 15
11.2 Disposal of new equipment packaging ........... 15
11.3 Disposal of lubricants...................................... 15
11.4 Disposal via municipal collection points.......... 15
12 Troubleshooting ......................................... 16
13 Spare parts ................................................. 16
13.1 Ordering spare parts....................................... 16
13.2 Spare parts drawing KSO 790 ....................... 17
14 Wiring diagram ........................................... 18
15 EC Declaration of Conformity ................... 19

Introduction
KSO 790 | Version 3.02 3
1 Introduction
You have made a good choice by purchasing the Edge
milling machine made by HOLZSTAR.
Thoroughly read the operating instructions before
commissioning the machine.
It informs you about the proper commissioning, the in-
tended use as well as the safe and efficient operation
and maintenance of the Edge milling machine.
The operating instructions are part of the Belt & spindle
sanding machine. Always keep it at the place of use of
the Edge milling machine. Furthermore, the local acci-
dent prevention regulations and the general safety notes
are applicable for the field of application of the Edge mil-
ling machine.
The illustrations in these operating instructions serve the
general comprehension and may deviate from the actual
type.
1.1 Copyright
The contents of these instructions are copyright. Their
application is admissible in the frame of the device. An
application beyond the described application is not allo-
wed without written approval of the manufacturer.For the
protection of our products, we shall register trademark,
patent and design rights, as this is possible in individual
cases. We strongly oppose any infringement of our intel-
lectual property.
1.2 Customer service
Please contact your dealer if you have questions on the
machine or if you need technical advice. They will help
you with specialist information and expert advice.
Stürmer Maschinen GmbH
Dr.-Robert-Pfleger-Str. 26
D-96103 Hallstadt
Repair service:
Fax: [phone] - 55
E-Mail: [e-mail]
Internet: www.holzstar.de
Spare part orders:
Fax: [phone]
E-Mail: [e-mail]
We are always interested in valuable experience and
knowledge gained from using the application, which then
could be shared and be valuable to develop our products
even further.
1.3 Limitation of liability
All information and notes in these operating instructions
were summarised taking the applicable standards and
rules, the state-of-the-art and our long-term knowledge
and experiences into consideration.
In the following cases the manufacturer is not liable for
damages:
- Non-observance of the operating instructions,
- Inappropriate use
- Use of untrained staff,
- Unauthorised modifications
- Technical changes,
- Use of not allowed spare parts.
The actual scope of delivery may deviate from the expla-
nations and presentations described here in case of spe-
cial models, when using additional ordering options or
due to latest technical modifications.
The obligations agreed in the delivery contract, the gen-
eral terms and conditions as well as the delivery conditi-
ons of the manufacturer and the legal regulations at the
time of the conclusion of the contract are applicable.
2 Safety
This paragraph will give you an overview of all important
safety packages for the protection of the people using it
well as for a safe and undisturbed operation. Other task-
based safety notes are included in the individual chapters.
2.1 Symbol explanation
Safety instructions
The safety notes in these operating instructions are high-
lighted by symbols. The safety notes are introduced by
signal words which express the concern of the risk.
DANGER!
This combination of symbol and signal words indi-cates
an imminently dangerous situation which may lead to
death or severe injuries if they are not avoi-ded.
WARNING!
This combination of symbol and signal word indicates
a potentially dangerous situation that can lead to
death or serious injury if not avoided.

4KSO 790 | Version 3.02
Safety
Tips and recommendations
It is necessary to observe the safety notes quoted in
these operating instructions in order to reduce the risks
for personal injuries and damages to property.
2.2 Obligations of the operating com-
pany
The operating company is the person who operates the
machine for business or commercial reasons by herself,
or leaves it to a third party for use or application, and who
bears the legal product responsibility for the protection of
the user, the staff or for third parties.
Obligations of the operating company:
If the machine is used for commercial purposes, the op-
erating company must comply with the legal working
safety regulations. Therefore, the safety notes in this op-
erating manual, as well as the safety, accident preven-
tion and environment protection regulations applying for
the area of application of the machine must be met. The
following applies in particular:
- The operating company must be informed about
the applying industrial safety regulations and fur-
ther analyse hazards resulting from the special
working conditions at the place of use machine.
She must implement these in form of operating
manuals for the operation machine.
- During the entire lifetime of machine, the operating
company must verify whether the operating manu-
als prepared by her correspond to the current sta-
tus of the regulations, and must adapt these if nec-
essary.
- The operating company must unambiguously regu-
late and determine the responsibilities for installa-
tion, operation, troubleshooting, maintenance and
cleaning.
- The operating company must ensure that all per-
sons who work with machine, have read and un-
derstood this manual. Furthermore she must in-
struct the staff in regular intervals and inform them
about the hazards.
- The operator must provide the personnel with the
necessary protective equipment and bind the wea-
ring of necessary protective equipment.
Furthermore the operating company is responsible to
keep the Machine always in a technically flawless state.
Thus, the following applies:
- The operator must ensure that the maintenance in-
tervals described in this manual are kept.
- The operator must have all safety devices checked
regularly for their good working order and their in-
tegrity.
CAUTION!
This combination of symbol and signal word indicates
a potentially dangerous situation that can result in
minor injury if it is not avoided.
ATTENTION!
This combination of symbol and signal words indi-
cates a possibly dangerous situation which may lead
to property and environmental damages if they are
not avoided.
NOTE!
This combination of symbol and signal words indi-
cates a possibly dangerous situation which may lead
to property and environmental damages if they are
not avoided.
Tips and recommendations
This symbol highlights useful tips and recommenda-
tions as well as information for an efficient and trou-
ble-free operation.

Safety
KSO 790 | Version 3.02 5
2.3 Qualification of personnel
The different tasks described in this manual represent
different requirements to the qualification of the persons
entrusted with these tasks.
Only persons reliable working procedures can be ex-
pected from, are allowed to perform all works. Persons
the responsiveness of which is affected by e. g. drugs,
alcohol or medication, are not allowed to work with the
machine.
The qualifications of the personnel for the different tasks
are mentioned below:
Operator:
The operator is instructed by the operating company
about the assigned tasks and possible risks in case of
improper behaviour. Any tasks which need to be perfor-
med beyond the operation in the standard mode must
only be performed by the operator if it is indicated in
these instructions and if the operating company expres-
sively commissioned the operator.
Electrical specialist:
Due to his professional training, knowledge and experi-
ence as well as his knowledge of respective standards
and regulations the electrical specialist is able to perform
works on the electrical system and to recognise and
avoid any possible dangers himself.
Specialist staff:
Due to their professional training, knowledge and experi-
ence as well as their knowledge of relevant regulations
the specialist staff is able to perform the assigned tasks
and to recognise and avoid any possible dangers them-
selves.
Manufacturer:
Certain works may only be performed by specialist per-
sonnel of the manufacturer. Other personnel is not au-
thorized to perform these works. Please contact our cus-
tomer service for the execution of all arising work.
2.4 Personal protective equipment
The personal protective equipment serves to protect per-
sons against impairments of safety and health while wor-
king. The staff has to wear personal protective equip-
ment while performing different works on and with grind-
ing system which are indicated in the individual paragra-
phs of these instructions.
The personal protective equipment is explained in the
following paragraph:
WARNING!
Danger in case of insufficient quali-
fication of the staff!
Insufficiently qualified persons cannot estimate the
risks while using machine and expose themselves
and others to the danger of severe injuries.
- Have all works only performed by qualified persons.
- Keep insufficiently qualified persons and children
out of the working area.
Ear and head protection
The hearing protection protects the ears against
damages of hearing due to noise. The industrial hel-
met protects the head against falling objects and
bumping into fixed objects.
Eye protection
The protective goggles protect the eyes against parts
flying off and splashes of liquids.
Breathing protection
The breathing protection serves for protecting the
respiratory passages and the lung against the intake
of dust particles.
Protective gloves
The protective gloves serve to protect the hands
against sharp components as well as against friction,
abrasions or deep injuries.
Safety boots
The safety boots protect the feet against crushes, fal-
ling parts and slipping over on slippery underground.
Protective clothes
The protective clothes are tight clothes of little tensile
strength.

6KSO 790 | Version 3.02
Safety
2.5 Safety signs on the Machine
The following safety signs and notes are applied on the
grinding system (fig. 1), which need to be observed and
followed. .
Fig. 1: Safety signs
Damaged or missing safety symbols at the machine may
lead to errors with personal and material damages. The
safety symbols which are applied on the machine must
not be removed. Damaged safety symbols must be re-
placed immediately.
The machine must be put out of operation from the mo-
ment when the labels are unable to be recognized and
understood at first glance, until new labels are attached.
2.6 Safety devices
2.6.1Electrical connection
The cables must be connected directly to the machine
without intermediate points. For a safe working opera-
tion, the grounding must be checked (see wiring dia-
gram). If the motor overloads, it automatically switches
off. After a cooling time of approx. 2 minutes, the thermal
protection switch on the motor terminal box can be pres-
sed in again.
2.6.2Motor protection switch
The engine of the Edge milling machine has a thermal
protection switch that automatically shuts off the engine
in case of thermal overload.
After eliminating the cause of the overload and waiting
for the engine to cool down completely, the engine can
be restarted.
2.6.3Direction of rotation of the motor
After completing the electrical connection, start the ma-
chine and check the direction of rotation of the motor.
- Press start button
- Check the direction of rotation of the drive
2.7 Danger zones
Persons under the age of 16 are strictly prohibited from
operating the machine (EU Directive). The operator must
have read these operating instructions and understood
the dangers he is exposed to in case of misuse of the
machine. For illegible or unrecognizable passages of this
manual contact the manufacturer or dealer.
The machine owner is responsible for staffing the ma-
chine with qualified operators.
Fig. 2: Danger area
1 Danger area
2 Safety rope
2.8 Work space
Fig. 3: Work space
WARNING!
Danger due to insufficient qualifica-
tion of persons!
All electrical connections must be made by a qualified
professional to avoid the risk of personal injury from
improperly performed work.
234
1
6
5
DANGER!
Before using for the first time, the following points
should be carefully checked:
- Is the work area around the machine free?
- Are the switches on the control panel functional?
1
2

Intended Use
KSO 790 | Version 3.02 7
Personal protection
During operation safety glasses, gloves and head pro-
tection should be worn.
2.9 Regulations for safety and accident
pre-vention
The following instructions are to be followed by the ope-
rating personnel. The customer must ensure that the
operator has read and understood both these items and
the operating instructions for safety reasons.
- Before operating the machine, read the operating
instructions.
- Never touch rotating or moving parts.
- Always report electrical faults to an electrician.
- Always keep work clothes, long hair, jewelery etc.
away from the machine.
- Switch off machine when work is interrupted.
- Wear suitable safety clothing (accident prevention
shoes, safety glasses, etc.).
- Check safety devices for correct function before
starting work.
- Read and understand safety instructions attached
to the machine.
- Perform regular maintenance.
- Do not overload the machine.
- In the event of abnormal operation of the machine,
inform the supervisor immediately.
- Caution is advised when people are in the work
area.
- Never change the electrical system.
- Never remove mechanical or electrical safety de-
vices.
- Special attention is needed during transport or re-
construction; The transport regulations must be
followed.
3 Intended Use
The Edge milling machine KSO 790 is designed for
woodworking and not for the treatment of flammable or
harmful substances. The customer is responsible for the
choice of the material to be processed. It must be
connected to a suitable extraction system. The edge
sanding machine is suitable for private use, not for indu-
strial use. Proper use also includes compliance with all
information in this manual. Any use beyond the intended
use or otherwise is considered misuse.
Unauthorized modifications or changes to the grinder
may void the CE conformity of the grinder and are prohi-
bited. The company Stürmer Maschinen GmbH assu-
mes no liability for design and technical changes to the
edge grinding machine.
The improper use of the edge sanding machine as well
as the disregard of the safety regulations or the opera-
ting instructions exclude a liability of the manufacturer for
resulting damage to persons or objects and cause the
warranty to expire!
The material should meet the following require-
ments:
- Dry and clean.
- Buying high quality material is advisable.
DANGER!
- Caution is advised for people who are in the work
area.
- Switch off the machine if it is not immediately conti-
nued.
Tips and recommendations
In case of missing or illegible.
Signs are to be contacted for the purpose of subse-
quent delivery manufacturer or dealer.
WARNING!
Risk of misuse!
Misuse of the Edge milling machine can lead to dan-
gerous situations.
- Operate the edge sanding machine only in the per-
formance range specified in the technical data.
- Never bypass or override the safety devices.
- Never work on other materials than specified in the
intended use.
- Only operate the edge sanding machine in a techni-
cally perfect condition.
- Never work on several workpieces at the same time.

8KSO 790 | Version 3.02
Technical Data
4 Technical Data
4.1 Table
4.2 Type plate
Fig. 4: Type plate KSO 790
5 Transport, Packaging, Sto-
rage
5.1 Delivery and transport
Delivery
Check the Edge milling machine for visible transport da-
mage after delivery. If you discover any damage to the
Edge milling machine, immediately report it to the trans-
port company or the dealer.
Transport
Improper transport is accident-prone and can cause da-
mage or malfunctions for which we do not grant any liabi-
lity or guarantee.
Transport the scope of delivery secured against shifting
or tilting with a sufficiently dimensioned industrial truck to
the installation site.
Type KSO 790 230V/400V
Motor output 230 V / 50Hz 1,5 kW
Motor output 400 V / 50Hz 1,5 kW
Sanding belt dimensions 2.000 x 152 mm
Circumferential belt speed 11 m/sec.
Table height (min./max.) 790/890 mm
Table height adjustment 100 mm
Longitudinal table dimensions 783 x 221 mm
Cross table dimensions 514 x 221 mm
Grinding surface (graphite) 823 x 152 mm
Grinding roller diameter agg-
regate
70 mm
Extraction port-Ø 100 mm
Dimensions (LxBxH) 1320 x 600 x 1020
mm
Weight 78 kg
WARNING!
Severe or fatal injuries may occur if parts of the
machine tumble or fall down from the forklift
truck, pallet truck or from the transport vehicle.
Follow the instructions and information on the trans-
port box.
Note the total weight of the machine. The weight of
the machine is indicated in the "Technical data" of the
machine. When the machine is unpacked, the weight
of the machine can also be read on the rating plate.
Only use transport devices and load suspension gear
that can hold the total weight of the machine.
WARNING!
The use of unstable lifting and load suspension
equipment that might break under load can cause
severe injuries or even death. Check that the lifting
and load suspension gear has sufficient load-bea-
ring capacity and that it is in perfect condition.
Observe the accident prevention regulations issued
by your Employers Liability Insurance Association or
other competent supervisory authority, responsible
for your company.
Fasten the loads properly.

Description
KSO 790 | Version 3.02 9
General risks during internal transport
Devices may only be transported by authorized and qua-
lified persons. Act responsibly during transport and al-
ways consider the consequences. Refrain from daring
and risky actions.
Gradients and descents (e.g. driveways, ramps and the
like) are particularly dangerous. If such passages are
unavoidable, special caution is required.
Before starting the transport check the transport route for
possible danger points, unevenness and disturban-ces
as well as for sufficient strength and load capacity.
Danger points, unevenness and disturbance points must
be inspected before transport. The removal of danger
spots, disturbances and unevenness at the time of trans-
port by other employees leads to considerable dangers.
Careful planning of internal transport is therefore essen-
tial.
Transport with a forklift / pallet truck:
The edge sanding machine can be transported with a
forklift or pallet truck if it is firmly mounted on a pallet.
5.2 Packaging
All packaging materials and packaging aids used by the
Edge milling machine are recyclable and must always be
recycled.
Packing components made of cardboard are crushed to
waste paper collection.
The foils are made of polyethylene (PE) and the uphol-
stery parts made of polystyrene (PS). You can hand over
these substances to a recycling center or to the disposal
company responsible for you.
The packaging material must not get into the hands of
children, as some plastic packaging may present a suf-
focation hazard when used as a toy.
5.3 Storage
The Edge milling machine must be thoroughly cleaned
before being stored in a dry, clean and frost-free environ-
ment. Cover the machine with a protective tarpaulin.
6Description
Illustrations in this manual may differ from the origi-
nal
Fig. 5: Edge milling machine
1 Sanding belt
2 Engine
3 Clamping screw for height adjustment of the work-
bench
4 Work table
5 ON and OFF switch
6 Substructure
7 Suction connection
WARNING: DANGER OF TIPPING
The device may be lifted unsecured by a maximum
of 2cm.
Employees must be outside the danger zone, the
reach of loads.
Warn employees and, if necessary, advise employ-
ees of the hazard.
1
5
23
4
6
7

10 KSO 790 | Version 3.02
Specification and standard equipment
7 Specification and standard
equipment
- Longitudinal and transverse table for mitres from 0
° to 45 ° steplessly swiveling
- Horizontally and vertically usable sanding unit, thus
wide Eisatzbereich vertical grinding possible
- With abrasive belt quick tension
- Standard with cross table for contour grinding, swi-
veling up to 45 °
- Longitudinal table is height-adjustable by 80 mm
for optimum utilization of the grinding belt width
- Including infinitely adjustable miter fence
- Graphite coating on the sanding sole for a higher
sliding property of the sanding belt and longer ser-
vice life
- With lockable emergency stop switch
- operating manual
- EU standard according to (CE mark)
8 Setting up and connection
8.1 Requirements for the installation
site
The Edge milling machine must be set up stable on a le-
vel and firm ground. It is important to ensure that there is
enough freedom of movement to work. On each side
there must be at least 1 m distance from the wall to the
edge sanding machine.
The site should meet the following criteria:
- The substrate must be level, firm and vibration-
free.
- The substrate must not let any lubricant through.
- The installation or work area must be dry and well
ventilated.
- Do not operate machines that cause dust and
chips near the machine.
- There must be sufficient space for the operating
personnel, for material transport as well as for ad-
justment and maintenance work.
- The site must have good lighting.
8.2 Setting up the edge milling ma-
chine
8.3 Electrical connection
When making electrical connections, make sure that the
characteristics (voltage, mains frequency, protection)
match those on the rating plate and for the engine.
Step 1: Check that the Edge milling machine is off.
Step 2: Connect the machine to the mains and check the
direction of motor rotation. 400 V machine: If the
direction of rotation is wrong, two phases must
be exchanged.
WARNING!
Do not use profiles in excess of the specification thick-
ness. Use the machine only for the intended purpose
ATTENTION!
Danger of injury due to a machine that is not stably
erected!
Check the stability of the machine after placing it on
stable ground.
CAUTION!
Pay attention to the weight of the machine!
The machine may only be set up by two persons.
Check the aid accordingly for sufficient dimensioning
and load capacity.
DANGER!
Danger to life due to electric shock!
There is danger to life when in contact with live com-
ponents. Switched on electrical components can
cause uncontrolled movements and lead to serious
injuries.
DANGER!
All work on the electrical installation may only be car-
ried out by a qualified electrician.

Commissioning
KSO 790 | Version 3.02 11
9 Commissioning
9.1 Starting the machine
The following steps can be used to start the machine and
perform the editing process:
- Make sure the electrical connection is correct
- Press start button
Fig. 6: Starting the machine
9.2 Basic operation
The edger has a driven cylinder. He is moved by the en-
gine. The workpiece feed is done by hand. However, a
certain amount of experience is needed to work effi-
ciently. The following recommendations should be hel-
pful during processing:
- The operator should have basic knowledge of this
type of machine.
- The material removal is better when working in se-
veral passes at low delivery and higher feed rate.
- Operators should not wear loose clothing, neck-
laces, rings, etc. to prevent them from being pulled
into the running machine.
- However, the best surface quality can be achieved
by grinding in the fiber direction.
- The optimum delivery requires some experience,
and depends on the abrasive grain size, feed rate
and type of wood.
- Before processing, remove nail and other debris
from the workpiece.
- Never operate the machine with the guards remo-
ved - great risk of injury!
- It is important to ensure that all workpieces are
held and guided safely during processing.
- Only work on a piece of work that sits securely on
the table.
- Remove the chutes and workpiece parts only when
the machine is at a standstill.
9.3 Grinding
Rules for sanding with the edge sanding machine:
The grinding process may only be carried out by quali-
fied personnel experienced on these machines. The
workpiece feed is done by hand. The edge grinding ma-
chine KSO 790 can be used for edge grinding, surface
grinding and hollow grinding. The sanding unit can be
used horizontally and vertically. This results in a broad
field of application.
Edge grinding
To do this, place the grinding unit vertically. Place the
workpiece on the table. You can also apply the work-
piece to the adjustable miter fence.
Fig. 7: Edge grinding
Hollow grinding / contour grinding
Mount the cross table in working position, this is swive-
ling.
Fig. 8: Hollow grinding / contour grinding
Start-Button

12 KSO 790 | Version 3.02
Commissioning
Surface grinding
To do this, place the grinding unit horizontally. Put the
workpiece on the grinding stop.
Fig. 9: Surface grinding
Before processing
1. Begin your work with a coarse sandpaper and gra-
dually change to finer grits.
2. The optimal inclination of the workpiece can be adju-
sted.
3. Regularly clean sandpaper with a brush.
4. Replace damaged and worn abrasive belts immedi-
ately.
9.4 Adjustment and set-up work
9.4.1Sand paper mounting (Fig. 10)
By means of clamping lever, the sanding belt is loosened
and tensioned. To place the new sanding belt, the ten-
sion lever must be horizontal to the belt. Fold out the
sanding stopper. Loosen the clamping screw so that the
clamping rod is loosened. Loosen the nut on the extrac-
tion nozzle and pull the extraction nozzle backwards.
Open the protective cover and place the sanding belt on
the rollers. Observe the direction of movement on the in-
side of the sanding belt.
To tension the sanding belt, lay the tension lever again.
Fold up the protective cover and tighten the clamping
screw. Put the suction nozzle and the sanding stopper
back on the sanding belt and tighten the nut.
Sanding belts stretch during operation, a readjustment of
the tape run may be required.
1. Check the smooth sanding belt run with the machine
on. If necessary, adjust with the adjustment handle.
2. Check the free rotation of the sanding belt after each
adjustment and set-up procedure. Start the engine se-
veral times briefly and check the belt run.
Fig. 10: Sandpaper Assembly
9.4.2Sandpaper selection
Choosing the right abrasive grain is extremely important
for optimizing the grinding performance.
Always grind first with a coarse grain and then gradually
change to finer grits. Skip at most one grain level.
Too fine grains and worn abrasive belts can cause burn
marks on the workpiece.
-Grain 60: Surface grinding
-Grain 80: Surfaces and light calibration, most com-mon
grain size
-Grain 100 and 120: Surfaces and fine sanding
-Korn150, 180 and 220: Only fine sanding
9.4.3Grinding unit tilting
The grinding unit can be swiveled 90 ° from vertical to
horizontal. Only swivel the sanding table from the back of
the machine. Pull up the locking lever to release. To pi-
vot, grasp the motor console with your left hand and
grasp the sanding stop with your right hand. To lock,
push the locking lever down.
NOTE!
Before adjustment and set-up work, the machine
must be secured against accidental start-up.
Pull out the mains plug!
Tension lever
Adjustment handle
Screw
Limit stop
Safety metal sheet

Care, maintenance and repair
KSO 790 | Version 3.02 13
Fig. 11: Grinding unit tilting
9.4.4Setting the machine table
The machine table can be adjusted in height and swi-
veled. Loosen the two clamping screws, now you can ad-
just the height. Clamp the clamping screws in the desired
position again.
Fig. 12: Setting the machine table
9.4.5Adjustment of the cross table
The cross table is pivotable. The desired angle can be
set via the clamping screw.
Fig. 13: Adjustment of the cross table
9.4.6Suction connection
You can connect a suction device to the extraction
nozzle.
Fig. 14: Suction connection
10 Care, maintenance and repair
10.1Cleaning after work
Locking lever
Clamping screw for angle
adjustment
Screw
Screw
Danger!
Danger to live due to electrical
voltage!
Contact with live components can be fatal. Activated
electrical components can execute uncontrolled mo-
vements and cause serious injuries.
- Switch off the machine before carrying out cleaning
and maintenance work and unplug the power cord.
- Connections and repairs of electrical equipment
may only be performed by a qualified electrician.
Wearing safety gloves!
Wear protective clothing!
NOTE!
Never use harsh cleaning agents for cleaning. This
can lead to damage or destruction of the device.
Suction

14 KSO 790 | Version 3.02
Care, maintenance and repair
Step 1: Disconnect the power plug from the power outlet.
Step 2: Empty and clean the suction device.
Step 3: Clean the machine from sawdust and sawdust.
Step 4: Spray all unpainted metal surfaces with some
anti-rust spray.
Step 5: Check the machine for damage to the safety de-
vices and the sanding belt. If necessary, carry
out the repair or arrange for it, observing the
safety instructions.
10.2Regular checks
Functional test
The edge sanding machine is delivered ready to use.
Before each use, a functional test should be carried out.
The sanding belt has to be tensioned.
Step 1: Manually move the sanding belt, making sure it is
centered on the roller. If necessary, readjust
the sanding belt with the ribbon adjustment
screw.
Step 2: Turn on the edge sanding machine for a short
time and check the tape again.
Step 3: Switch off the edge sanding machine again.
The edge sanding machine is ready for operation.
Sanding belt
The sanding belt is a wearing part, which must be regu-
larly checked for faults and replaced when worn.
Regularly check the grinding belt for faults.
Replace a damaged sanding belt immediately. Check the
correct setting of the tape guide at regular intervals. Re-
lax the sanding belt during longer work breaks. Clean the
machine at regular intervals.
Fig. 15: Check the sanding belt
Suction
Check the adequate function of the extraction daily. Re-
place damaged safety equipment immediately. Reinstall
all protective equipment immediately. Connections and
repairs of the electrical equipment may only be carried
out by a qualified electrician.
Belt tension
Check the belt tension regularly and adjust the belt ten-
sion as follows. Turn off the machine and disconnect the
power plug! Remove the cover with the hexagon socket
screw (left picture). Then, open the 4 hex bolts (right)
from the engine mount and slide the engine down to ten-
sion the belt. Replace the screws and replace the cover.
Fig. 16: Check the belt tension
Movable parts
All moving parts must be cleaned after 50 hours of ope-
ration with a soft brush. Clean the edge sanding machine
with a strong stream of compressed air. Then apply a
thin layer of oil or grease to the moving parts. Lubricate
the slide rails with grease.
Sanding belt
NOTE!
The correct belt tension is reached as soon as it can
be pressed with the thumb only about 1cm.
Wearing safety gloves!
Socket screw Hexagon screw

Disposal instructions / recy-cling facilities
KSO 790 | Version 3.02 15
10.3Maintenance and repair
Maintenance and repair work may only be carried out by
qualified personnel.
If the Edge milling machine does not work properly, con-
tact a dealer or our customer service. The contact details
can be found in chapter 1.2 Customer Service.
All protection and safety equipment must be reinstalled
immediately after completion of repair and maintenance
work.
11 Disposal instructions / recy-
cling facilities
Dispose of your device in an environmentally friendly, by
not disposing of waste in the environment but professio-
nally.
Please take the packaging and later the old appliance
does not just go away, but discard them in accordance
with the relevant of your city / municipality or by the wa-
ste disposal company established guidelines.
11.1Decommission
Discarded appliances are immediately professionally de-
commission, in order to avoid any later misuse and the
threat to the environment or people.
Step 1: Unplug the power plug.
Step 2: Cut the connection cable.
Step 3: Remove all environmentally hazardous fluids
from the old unit.
Step 4: Remove batteries, if any.
Step 5: If necessary, disassemble the machine into ma-
nageable and usable assemblies and compo-
nents.
Step 6: Guide the machine components and operating
materials to the appropriate disposal routes.
11.2Disposal of new equipment packa-
ging
All used packaging materials and packaging aids of the
machine are recyclable and must always be recycled.
The packaging wood can be sent for disposal or recy-
cling.Packaging components made of cardboard can be
crushed for waste paper collection.
The foils are made of polyethylene (PE) or the upholstery
parts made of polystyrene (PS). These substances can
be reused after processing if they are passed on to a
recycling center or to the disposal company responsible
for them.
Only pass on the packaging material in such a way that it
can be directly recycled.
11.3Disposal of lubricants
The disposal instructions for the lubricants used are pro-
vided by the lubricant manufacturer. If necessary, ask for
the productspecific data sheets.
11.4 Disposal via municipal collection
points
Disposal of used electrical and electronic equipment
(Applicable in the countries of the European Union and
other European countries with a separate collection sy-
stem for these appliances).
The symbol on the product or its packaging indicates that
this product should not be treated as normal household
waste but must be returned to a collection point for the
recycling of electrical and electronic equipment. By hel-
ping to properly dispose of this product, you are protec-
ting the environment and health of others. Environment
and health are at risk from improper disposal. Material
recycling helps reduce the consumption of raw materials.
For more information on recycling this pro-duct, contact
your local community, municipal waste disposal service
or the shop where you purchased the product.
NOTE!
Spent coolant lubricant emulsions and oils should not
be mixed together, as only non-mixed waste oils
without pretreatment are usable.
NOTE!
In your own interests and in the interests of the env-
ironment, please ensure that all components of the
machine are disposed of in the proper and approved
way.

16 KSO 790 | Version 3.02
Troubleshooting
12 Troubleshooting
13 Spare parts
13.1Ordering spare parts
The spare parts may be purchased with the authorised
dealer or directly with the manufacturer. Please find the
corre-sponding contact data in Chapter 1.2 Customer
service.
Indicate the following basic information for spare part or-
ders:
- Type of device
- Serial number
- Quantity
- Designation
- Required mode of dispatch (mail, freight, sea, air,
express)
- Address of dispatch
Spare part orders which do not include the above indica-
tions may not be taken into consideration. If the indicati-
ons regarding the mode of dispatch are missing, the pro-
duct is dispatched at the discretion of the supplier.Infor-
mation on the device type, item number and year of ma-
nufacture can be found on the nameplate, which is atta-
ched to the unit.
Example
The drive belt for the Edge milling machine KSO 790
400V must be ordered. The drive belt has the number 41
in the spare parts drawing 1.By ordering spare parts,
send a copy of the spare parts drawing (1) with the mar-
ked part (drive belt) and marked positon number (41) to
the dealer or spare parts department and provide the
following information:
- Type of device: Edge milling machine
KSO 790 400V
- Item number: 5900790
- Drawing number: 1
- Postion number: 41
Fault Possible causes Removal
The edge grinding ma-
chine stops during opera-
tion.
The on / off switch is damaged.
The on / off switch line is damaged.
The relay is damaged.
The engine is defective.
The fuses are defective.
Backup has triggered.
Have the edge grinder checked by an electri-
cian and replace the damaged parts.
Wait for the engine to cool and remove the
cause of the overload. Then switch on the
fuse and restart.
The edge sanding ma-
chine does not start.
One or more power phases have failed. Lets check qualified personnel that all 3 pha-
ses are live.
The edge sanding ma-
chine slows down when
sanding.
The workpiece is pressed too tightly
against the grinding surface by the
user.
Reduce the contact pressure.
The sanding belt runs off
the rollers.
The grinding belt run is set incorrectly. Adjust the sanding belt run correctly (see
"Assembly and settings").
The wood gets dark or
burns while working.
1.The sanding belt is worn or added
with sanding dust.
2.Excessive contact pressure is ap-
plied to the workpiece on the grinding
surface
1.Change the sanding belt.
2.Reduce the contact pressure
DANGER!
Danger of injury by the use of
wrong spare parts!
Dangers may result for the user and damages as well
as malfunctions may be caused by using wrong or
damaged spare parts.
- Only use original spare parts of the manufacturer or
spare parts admitted by the manufacturer.
- Always contact the manufacturer in case of uncer-
tainties.
Tips and recommendations
Using non-approved spare parts voids the manu-
facturer's warranty.

Spare parts
KSO 790 | Version 3.02 17
13.2Spare parts drawing KSO 790
The following drawing is intended to help in case of service, to identify necessary spare parts. To order send a copy of the
parts drawing with marked components to your dealer.
Fig. 17: Spare parts Drawing

18 KSO 790 | Version 3.02
Wiring diagram
14 Wiring diagram
Fig. 18: Wiring diagram KSO 790 230V
Fig:19 Wiring diagram KSO 790 400V

EC Declaration of Conformity
KSO 790 | Version 3.02 19
According to Machinery Directive 2006/42 / EC Annex II 1.A
Manufacturer / distributor: Stürmer Maschinen GmbH
Dr.-Robert-Pfleger-Str. 26
D-96103 Hallstadt
hereby declares that the following product
Product group: Holzstar® Wood working machines
Machine type: Edge milling machine
Designation of the machine *: KSO 790 400V Item number *: 5900790
KSO 790 230V 5900791
Serial number*: ___________________
Year of manufacture*: 20____
* please fill in according to the information on the type plate
complies with all relevant provisions of the above-mentioned Directive as well as the other applicable Directives (hereaf-
ter), including any changes in force at the time of declaration.
Relevant EU directives: 2014/30/EU EMC-Directive
The following harmonized standards were applied:
DIN EN ISO 12100-1:2010 Safety of machinery - General principles for design - Risk assessment
and risk reduction (ISO 12100:2010)
DIN EN 60204-1:2014 Safety of machinery - Electrical equipment of machines -
Part 1: General requirements
Responsible for documentation: Kilian Stürmer, Stürmer Maschinen GmbH,
Dr.-Robert-Pfleger-Straße 26, D-96103 Hallstadt
Hallstadt, 10.07.2016
______________________
Kilian Stürmer
Manager
15 EC Declaration of Conformity

www.holzstar.de