KNECHT KLA220-HV153 II User manual

Status 02.2023 ■Version 1.0 | Translation
KLA 220 – HV 153 II
Circular Knife Sharpening machine
Operating Instructions

3
Circular Knife Sharpening machine KLA220 – HV 153 II
Manufacturer
KNECHT Maschinenbau GmbH
Witschwender Straße 26
88368 Bergatreute
Germany
Phone [phone]
Fax [phone]
[email protected]
www.knecht.eu
Documents for machine operator
Operating Instructions
Date of issue of the operating instructions
February 2, 2023
Copyright
These operating instructions as well as the operating documents remain the copyright property of KNECHT
Maschinenbau GmbH. They are supplied only to customers and operators of our products and belong to
the machine.
Without our express permission, these documents may neither be duplicated nor made accessible to third
parties, in particular competitor companies.
Operating Instructions

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1. Important notes 7
1.1 Preface to the operating instructions 7
1.2 Warnings and symbols in the operating instructions 7
1.3 Warning signs and their meaning 8
1.4 Rating plate and machine serial number 10
1.5 Figure and position numbers in the operating instructions 10
2. Safety 11
2.1 Basic safety instructions 11
2.1.1 Observe notes in the operating instructions 11
2.1.2 Obligation on the part of the operator 11
2.1.3 Obligation on the part of the personnel 11
2.1.4 Hazards involved in handling the circular knife sharpening machine 11
2.1.5 Malfunctions 12
2.2 Intended use 12
2.3 Warranty and liability 12
2.4 Safety regulations 13
2.4.1 Organizational measures 13
2.4.2 Protective equipment 13
2.4.3 Informal safety measures 13
2.4.4 Selection and qualification of personnel 13
2.4.5 Machine control system 14
2.4.6 Safety measures in normal operation 14
2.4.7 Hazards due to electrical power sources 14
2.4.8 Particular hazard areas 14
2.4.9 Servicing (maintenance, repair) and fault rectification 14
2.4.10 Structural alterations to the circular knife sharpening machine 15
2.4.11 Cleaning the circular knife sharpening machine 15
2.4.12 Lubricants/oils and greases 15
2.4.13 Relocation of the circular knife sharpening machine 15
3. Description 16
3.1 Intended use 16
3.2 Technical specifications 16
3.3 Functional description 18
3.3.1 Setup 18
3.4 Description of the assemblies 19
3.4.1 Angle scale 20
3.4.2 Control panel 20
3.4.3 HV156 Dressing device 20
Inhaltsverzeichnis

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4. Transport 21
4.1 Transport aids 21
4.2 Transport damage 21
4.3 Transport to another installation site 21
5. Installation 22
5.1 Auswahl des Fachpersonals 22
5.2 Installation site 22
5.3 Supply connections 22
5.4 Settings 22
5.5 Initial start-up of the circular knife sharpening machine 23
6. Commissioning 24
7. Operation 26
7.1 General grinding fundamentals 26
7.2 Grinding circular knives d. 180–475 mm 27
7.2.1 Adjusting the grinding angle 27
7.2.2 Adjusting the grinding wheels 27
7.2.3 Angle scale 28
7.2.4 Mounting the circular knife holding fixture No. 3 d. 180–475 mm 29
7.2.5 Swiveling the circular knife grinding attachment into the clamping position 30
7.2.6 Clamping the knife 31
7.2.7 Bringing the circular knife grinding attachment into the grinding position 33
7.2.8 Grinding circular knives with double-sided cutting edge 37
7.2.9 Unclamping the circular knife 39
7.2.10 Water tray 40
7.2.11 One-sided cutting edge – Option 1
Version with infinitely variable speed control of the grinding wheels 41
7.2.12 One-sided cutting edge – Option 2
Version without infinitely variable speed control of the grinding wheels 41
7.2.13 One-sided cutting edge – Option 3
Only for special applications and after consultation with KNECHT Service 41
7.3 Grinding circular knives d. 60–180 mm (d. 180 – 250 mm) 43
7.3.1 Adjusting the grinding angle 43
7.3.2 Adjusting the grinding wheels 43
7.3.3 Angle scale 44
7.3.4 Mounting the circular knife holding fixture No. 1 d. 60–180 mm (No. 2 d. 180 – 250 mm) 45
7.3.5 Swiveling the circular knife grinding attachment into the clamping position 46
7.3.6 Clamping the knife 47
7.3.7 Bringing the circular knife grinding attachment into the grinding position 49
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7.3.8 Grinding circular knives with double-sided cutting edge 52
7.3.9 Unclamping the circular knife 54
7.3.10 Water tray 55
7.3.11 One-sided cutting edge – Option 1
Version with infinitely variable speed control of the grinding wheels 56
7.3.12 One-sided cutting edge – Option 2
Version without infinitely variable speed control of the grinding wheels 56
7.4 Dressing grinding wheels 57
7.5 Changing the grinding wheels 60
8. Care and maintenance 64
8.1 Cleaning 64
8.1.1 Cleaning agent and lubricant table 64
8.2 Maintenance plan (one-shift operation) 64
9. Disassembly and disposal 66
9.1 Disassembly 66
9.2 Disposal 66
10. Service, spare parts and accessories 67
10.1 Postal address 67
10.2 Service 67
10.3 Spare parts 67
10.4 Accessories 68
10.4.1 Abrasives used, etc. 68
11. Anhang 69
11.1 EU Declaration of Conformity 69
Inhaltsverzeichnis

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1.1 Preface to the operating instructions
These operating instructions are intended to make it easy to learn how to use the Circular Knife
Sharpening Machine and to properly utilize its features.
These operating instructions contain important notes on how to operate the circular knife sharp-
ening machine safely, properly, and efficiently. Observing these instructions helps to avoid haz-
ards, reduce repair costs and downtimes, and to increase the reliability and service life of the
sharpening machine.
The operating instructions must always be stored in the location that the circular knife sharpening
machine is used.
The operating instructions must be read and applied by every person tasked with working with
the circular knife sharpening machine, e.g.:
• transport, installation, commissioning
• operation, including error rectification during operation, as well as
• servicing (maintenance, repair).
Recognized technical standards for safe and professional work must be observed in addition to
these operating instructions and the binding accident prevention regulations applicable in the
country of use and at the place of use.
1.2 Warnings and symbols in the operating instructions
The operating instructions use the following symbols/designations that must be followed:
The hazard triangle with the signal word “CAUTION” serves as a work
safety notice for all work for which there is a risk of personal injury or
death.
In these cases, work should be done with special attention and care.
ATTENTION
“ATTENTION” is written in places where special attention must be paid to
prevent damage or destruction of the circular knife sharpening machine or
its surroundings.
NOTE “NOTICE” refers to user tips and especially useful informations.
1. Important notes
CAUTION

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1.3 Warning signs and their meaning
The following warnings and mandatory signs have been affixed on the sharpening machine:
CAUTION! DANGEROUS ELECTRICAL VOLTAGE
(warning sign on switch housing)
The circular knife sharpening machine carries life-threatening
voltage when it is connected to the current supply.
Voltage-carrying device parts may only be opened by authorized
personnel.
The circular knife sharpening machine must be separated from the
mains supply before carrying out servicing, maintenance and repair
work on it.
CAUTION! DANGER of Retraction!
(Warning sign on the protection hood)
When the circular knife sharpening machine is switched on, there
is a danger of hands, hair and clothing being drawn in.
CAUTION! DANGER OF CUTTING!
(Warning sign on the protection hood)
When working with circular knives, there is a danger of being cut
by sharp knife edges.
ATTENTION! READ OPERATING INSTRUCTIONS!
(Warning sign on the control panel)
Before commissioning and working with the circular knife
sharpening machine, read and follow the operating instructions
and safety instructions.
1. Important notes

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1. Important notes
CAUTION! PULL OUT THE MAINS PLUG BEFORE OPENING!
(mandatory sign on the control panel)
Before opening the control panel, the sharpening machine must
be disconnected from the power supply.
CAUTION! RISK OF INJURY FROM ABRASIVE PARTICLES
(mandatory sign on the protection hood)
Abrasive particles are generated during grinding, deburring and
dressing, which can enter the eyes.
Eye protection must be worn during these operations.
CAUTION! RISK OF INJURY FROM KNIFE
(mandatory sign on the protection hood)
Working with the circular knife sharpening machine involves
grinding knives that could cause serious cut injuries due to their
sharpness.
Caution when transporting knives. Use the protective equipment
provided by the knife manufacturer. Protective gloves and safety
shoes must be worn.

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1.4 Rating plate and machine serial number
The rating plate (1-1) is located on the rear panel
of the machine.
The machine serial number (1-2) is located on the
rating plate (1-1) and on the left underneath the
water tray.
1.5 Figure and position numbers in the operating instructions
If the text refers to a component of the machine that is shown in a figure, the figure and position
number is given in brackets.
Example: (7-1/1) means picture number 7-1, position 1.
The grinding angle is set via the star knob (7-1/1) on the
right side of the machine.
On the machine housing there is a scale (7-1/2) on which
the grinding angle is read off.
Since the grinding angle changes with increasing wear of
the grinding wheels, it must be readjusted daily and after
each dressing process.
1. Important notes
Figure 1-1 Rating plate
Figure 1-2 Machine serial number
Figure 7-1 Grinding angle display
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1

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2.1 Basic safety instructions
2.1.1 Observe notes in the operating instructions
The basic prerequisite for the safe handling and trouble-free operation of this circular knife
sharpening machine is knowledge of the basic safety instructions and safety regulations.
• These operating instructions contain important notes on how to operate the circular knife
sharpening machine safely.
• All persons carrying out work on the circular knife sharpening machine must follow these
operating instructions, in particular the safety notices.
• In addition, the rules and regulations regarding accident prevention at the place of use are to be
observed.
2.1.2 Obligation on the part of the operator
The operator is obliged to allow only those persons to work on the circular knife sharpening ma-
chine, who
• are familiar with the occupational safety and accident prevention regulations and have received
instruction in handling the circular knife sharpening machine,
• have read and understood the operating instructions, in particular the section entitled “Safety”
and the warning notes, and have provided signed confirmation of this.
The safety-awareness of the personnel at work will be monitored at regular intervals.
2.1.3 Obligation on the part of the personnel
All personnel working on the sharpening machine shall be obliged, before starting work, to
• observe basic occupational safety and accident prevention regulations,
• read the operating instructions, particularly the section entitled “Safety” and the warning notes,
and provide signed confirmation that they have understood them.
2.1.4 Hazards involved in handling the circular knife sharpening machine
The circular knife sharpening machine has been built to the latest technological standards and the
recognized rules of technical safety. In spite of this, its use poses inherent risks which could result
in bodily harm or even death of the user or third persons, or damage to the circular knife sharpen-
ing machine or other property.
The circular knife sharpening machine may be used only:
• for its intended purpose
• in a safe and secure condition.
2. Safety

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Malfunctions that may impair safety are to be eliminated immediately.
2.1.5 Malfunctions
If safety-relevant malfunctions occur with the circular knife sharpening machine, or if the process-
ing behavior indicates that such malfunctions may have occurred, the circular knife sharpening
machine must be stopped immediately and until such time as the malfunction has been found
and eliminated.
Allow only authorized trained personnel to eliminate the malfunctions.
2.2 Intended use
The circular knife sharpening machine is exclusively suitable for sharpening circular knives with a
diameter of 60–475 mm.
Any other use or use beyond this is not considered as intended. KNECHT Maschinenbau GmbH is
not liable for any damage resulting from this. The risk is borne solely the user.
Intended use also includes observing all instructions in the operating manual.
ATTENTION Improper use of the circular knife sharpening
machine exists, for example, if:
• devices are not properly fastened.
• knives other than those mentioned above
are sharpened.
• knives are ground on the wrong circular
knife holding fixture.
2.3 Warranty and liability
Warranty and liability claims in case of personal injury or property damage are excluded if such
damage is attributable to one or more of the following causes:
• improper use of the circular knife sharpening machine,
• improper transport, commissioning, operation, and maintenance of the circular knife sharpening
machine,
• operating the circular knife sharpening machine with defective safety devices, or using
improperly attached or malfunctioning safety and protective equipment,
• failure to observe the instructions with regard to transportation, commissioning, operation,
maintenance and repair of the circular knife sharpening machine,
2. Safety

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• unauthorized structural alterations to the circular knife sharpening machine,
• unauthorized modification, e.g. of the drive conditions (output and speed),
• failure to monitor machine parts that are subject to wear, and
• use of unapproved replacement and wear parts.
Use only original replacement and wear parts. If externally purchased parts are used, it is not
guaranteed that they have been designed and manufactured to meet the requirements in terms
of stress and safety.
2.4 Safety regulations
2.4.1 Organizational measures
Inspect all available safety devices regularly.
Observe prescribed intervals for recurring maintenance work or as specified in the operating
instructions!
2.4.2 Protective equipment
Before every commissioning of the circular knife sharpening machine, ensure that all protective
equipment is properly mounted and in functional condition.
Protective equipment may be removed only after the circular knife sharpening machine has
stopped and has been secured against accidental restart.
When attaching spare parts, the protective equipment must be attached by the operator as
stipulated.
2.4.3 Informal safety measures
The operating instructions must be permanently available at the place of use of the circular knife
sharpening machine. In addition to the operating instructions, the generally applicable as well as
locally relevant accident prevention regulations must also be made available and observed.
All safety alert symbols and hazard warnings on the circular knife sharpening machine must be
complete and clearly legible.
2.4.4 Selection and qualification of personnel
Only trained and instructed personnel may work on the circular knife sharpening machine.
Observe the legally permitted minimum age!
The responsibilities of personnel with respect to commissioning, operation, maintenance, and
repair must be clearly specified.
2. Safety

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Personnel still undergoing training or instruction may only work on the circular knife sharpening
machine under the permanent supervision of an experienced person!
2.4.5 Machine control system
Only trained and instructed personnel are permitted to switch on and operate the machine.
2.4.6 Safety measures in normal operation
Do not operate the machine in any unsafe manner. Only operate the circular knife sharpening
machine if all the safety devices are installed and fully functional.
At least once per shift (or per day), check the circular knife sharpening machine for externally
visible damage and proper functioning of the safety devices.
Immediately report any changes present (including those of the operating behavior) to the respon-
sible office or person. If necessary, immediately shut down the circular knife sharpening machine
and secure it against restart.
Before you switch on the circular knife sharpening machine, ensure that no one can be injured by
the start-up of the machine.
In the event of a malfunction, immediately stop the circular knife sharpening machine and secure
it against restart. Rectify malfunctions immediately.
2.4.7 Hazards due to electrical power sources
Work on electrical systems or operating materials may only be performed by a qualified electrician,
in accordance with electrical regulations.
Defects, such as damaged cables, cable connections, etc. must be immediately rectified by an
authorized specialist.
2.4.8 Particular hazard areas
Hazard in the area of the grinding wheels: objects, e.g. clothing, fingers and hair, can be pinched
and drawn in. Wear suitable personal protective equipment.
2.4.9 Servicing (maintenance, repair) and fault rectification
Maintenance work is to be carried out on schedule by trained personnel. Inform operating
personnel before beginning repair work. Designate a supervisor responsible for this.
For all service work, the circular knife sharpening machine is to be disconnected from the current
supply and secured against accidental restart.
Remove power plug. Secure repair area as necessary.
2. Safety

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After completing maintenance work and rectifying any faults, install all safety devices and verify
that they are fully functional.
2.4.10 Structural alterations to the circular knife sharpening machine
Do not make any changes, additions or conversions to the circular knife sharpening machine
without the approval of the manufacturer. This also applies to the installation and setup of safety
devices.
Any conversion work requires the written permission from KNECHT Maschinenbau GmbH.
Immediately replace machine parts that are not in perfect condition.
Use only original replacement and wear parts. If externally purchased parts are used, it is not
guaranteed that they have been designed and manufactured to meet the requirements in terms
of stress and safety
2.4.11 Cleaning the circular knife sharpening machine
Properly handle any cleaning agents and materials used and dispose of them in an environmental-
ly-friendly manner.
Dispose of the wear parts and replacement parts in a safe and environmentally-friendly manner.
2.4.12 Lubricants/oils and greases
When using oils and greases, follow the safety regulations applicable to the product. Comply with
the special regulations for the food areas.
2.4.13 Relocation of the circular knife sharpening machine
Disconnect the circular knife sharpening machine from any external power supply, even in the
event of a minor change of location. Before restarting the circular knife sharpening machine,
connect it properly to the power supply.
For loading work, use only lifting equipment and load-bearing devices with sufficient lifting
capacity. Appoint a qualified instructor for the lifting operation.
No persons other than those designated for this work may be present in the loading and
installation area.
When restarting the machine, proceed only in accordance with the operating instructions.
2. Safety

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3. Description
3.1 Intended use
The KLA 220–HV153 II circular knife sharpening machine can be used to sharpen and deburr
circular knives with a diameter from 60 – 475 mm.
3.2 Technical specifications
Table version
Height �������������������������������������������������������������� approx. 790 mm
Width ��������������������������������������������������������������� approx. 835 mm
Depth ��������������������������������������������������������������� approx. 850 mm
Space requirement (WxD) ��������������������������������������������� 1000 x 1200 mm
Weight ���������������������������������������������������������������� approx. 76 kg
Version with machine table
Height ������������������������������������������������������������� approx.1640 mm
Width ��������������������������������������������������������������� approx. 910 mm
Depth ��������������������������������������������������������������� approx. 850 mm
Space requirement (WxD) ��������������������������������������������� 1000 x 1200 mm
Weight ��������������������������������������������������������������� approx.170 kg
Power supply* ������������������������������������������������������������� 3x 400 V
Mains frequency* �������������������������������������������������������������� 50 Hz
Electrical Output* ����������������������������������������������������������� 0,50 kW
Power consumption* �������������������������������������������������������� 0,53 kW
Current consumption* ��������������������������������������������������������� 1,52 A
Back-up fuse ������������������������������������������������������������������� 16 A
Idle noise level** ���������������������������������������������������� approx. 68 dB (A)
Operating noise level (Measured A-weighted emission ��������������������� approx. 71 dB (A)
sound pressure level at workplace LpA**)

790 mm850 mm
850 mm
835 mm
790 mm850 mm
850 mm
835 mm
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Figure 3-1 Dimensions in mm
Diameter wet grinding wheels ������������������������������������������������� 150 mm
Speed of grinding wheels ��������������������������������������������������� 170 1/min
*) This information may change depending on the electrical current supply.
**) Two-digit sound emission value according to EN ISO 4871 (measurement uncertainty KpA. 3 dB (A)).
Emission sound pressure level according to EN ISO 11201.
A circular knife with a diameter of 200 mm was ground.
3. Description

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3. Description
3.3 Functional description
The KLA 220–HV153 II circular knife sharpening machine can be used to sharpen and deburr
circular knives with diameters from 60 to 475 mm.
Three circular knife holding fixtures are available:
• Circular knife holding fixture 1: 60-180 mm diameter
• Circular knife holding fixture 2: 180-250 mm diameter
• Circular knife holding fixture 3: 180-475 mm diameter
With the KLA 220–HV153 II, one-sided and two-sided cutting edges can be produced.
The machine is equipped with four grinding wheels (two left and two right). The grinding and
deburring angle can be set between 5°–40°.
3.3.1 Setup
The sharpening machine has two grinding units, each with two grinding wheels. The left unit
processes the left side of the knife, the right unit the right side of the knife.
Both grinding units are each driven by a motor. Power is transmitted to the grinding wheels via a
V-belt to a worm gear.
The grinding wheels of the left grinding unit can be operated in both directions. The grinding
wheels of the right unit are infinitely variable in speed (optional). This allows one-sided cutting
edges to be produced on the circular knife.

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3. Description
3.4 Description of the assemblies
1 Circular knife holding fixture 1: d.60–180 mm
2 Dressing device HV156
3 Control panel
4 Machine table (optional)
5 Drawer with storage space for knife holding fixtures and accessories
6 “Height adjustment” hand wheel Circular knife grinding attachment
7 Circular knife holding fixture 3: d.180–475 mm
8 Protection hood
9 Water tray
10 Machine feet
Figure 3-2 General view of circular knife sharpening machine
8
9
10
7
6
2
1
3
4
5

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3. Description
3.4.1 Angle scale
1 Angle scale
3.4.2 Control panel
1 “Emergency stop” button
2 “Control On” button
3 “Deburring/grinding” selection switch
4 Rotary knob for speed regulation right
grinding wheels (optional)
3.4.3 HV 156 Dressing device
1 Dressing diamond
Figure 3-4 Control panel
Figure 3-3 Angle scale
1
2 3 4
Figure 3-5 HV156 dressing device
1
1