KNECHT S 20 User manual

Status 07.2022 Version 3.0 | Translation
Operating Instructions
Universal Wet-Sharpening Machine
S 20 | S 20 B

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Universal Wet-Sharpening Machine S 20 | S 20 B
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
July 28, 2022
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 8
1.1 Preface to the operating instructions 8
1.2 Warnings and symbols in the operating instructions 8
1.3 Warning signs and their meaning 9
1.3.1 Warning and mandatory signs on/in the grinding machine 9
1.3.2 General mandatory signs 9
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 grinding machine 11
2.1.5 Malfunctions 12
2.2 Intended use 12
2.3 Warranty and liability 13
2.4 Safety regulations 13
2.4.1 Organizational measures 13
2.4.2 Protective equipment 13
2.4.3 Informal safety measures 14
2.4.4 Selection and qualification of personnel 14
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 15
2.4.9 Servicing (maintenance, repair) and fault rectification 15
2.4.10 Structural alterations to the grinding machine 15
2.4.11 Cleaning the grinding machine 15
2.4.12 Lubricants/oils and greases 16
2.4.13 Relocation of the grinding machine 16
3. Description 17
3.1 Intended use 17
3.2 Technical specifications 17
3.2.1 General 17
3.2.2 S 20 (version with grinding wheel) 18
3.2.3 S 20 B (version without grinding wheel) 19
3.3 Functional description 20
3.4 Description of the assemblies 21
3.4.1 Tool cabinet 22
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3.4.2 Coolant dosing wet-grinding belt 22
3.4.3 Control panel 22
3.4.4 Grinding unit (S 20) 23
3.4.5 Grinding and polishing unit for wet-grinding belt and finned brushes 23
3.4.6 Dressing tool HV 201 (S 20) 23
3.4.7 Coolant unit 24
3.4.8 Circular knife grinding attachment HV 25-1 for circular knives 80 – 250 mm (optional, S 20) 24
3.4.9 Circular knife grinding attachment HV 25-2 for circular knives 250 – 470 mm (optional, S 20) 24
3.5 Functional description of units 25
4. Transport 27
4.1 Transport aids 27
4.2 Transport damage 27
4.3 Transport to another installation site 27
5. Installation 28
5.1 Selection of qualified personnel 28
5.2 Installation site 28
5.3 Supply connections 28
5.4 Settings 28
5.5 Initial start-up of the grinding machine 29
6. Commissioning 30
7. Operation 32
7.1 General grinding fundamentals 32
7.2 Grinding sickle-shaped cutter knives on the grinding wheel
(convex cutting edge) S 20 33
7.2.1 Positioning the mounting head 33
7.2.2 Inserting the function disc 35
7.2.3 Mounting the grinding plate SP 107 36
7.2.4 Clamping the sickle-shaped cutter knife 38
7.2.5 Positioning the sickle-shaped cutter knife on the grinding wheel 40
7.2.6 Setting the grinding angle 40
7.2.7 Grinding the sickle-shaped cutter knife (convex cutting edge) 41
7.3 Grinding sickle-shaped cutter knives on the wet-grinding belt
(convex cutting edge) (S 20 | S 20 B) 43
7.3.1 Setting the grinding radius 43
7.3.2 Locking the carriage in place 45
7.3.3 Inserting the function disc 45
7.3.4 Setting the grinding angle 46
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7.3.5 Mounting the grinding plate SP 107 46
7.3.6 Adjusting the swivel range of the grinding plate 47
7.3.7 Clamping the sickle-shaped cutter knife 47
7.3.8 Basic function of the locking mechanism of the grinding and polishing unit 49
7.3.9 Bringing the grinding and polishing unit into the adjustment position 50
7.3.10 Grinding the sickle-shaped cutter knife 51
7.3.11 Polishing and deburring the sickle-shaped cutter knife 53
7.4 Grinding linear cutter knives on the grinding wheel
(convex cutting edge) (S 20) 59
7.4.1 Positioning the mounting head 59
7.4.2 Inserting the function disc 61
7.4.3 Mounting the grinding plate SP 107 61
7.4.4 Clamping the linear cutter knife 62
7.4.5 Positioning the linear cutter knife on the grinding wheel 64
7.4.6 Aligning the linear cutter knife on the grinding wheel 65
7.4.7 Setting the grinding angle 66
7.4.8 Grinding the linear cutter knife (convex cutting edge) 67
7.5 Grinding linear cutter knives on the wet-grinding belt
(convex cutting edge) (S 20 | S 20 B) 69
7.5.1 Setting the grinding radius 69
7.5.2 Releasing the carriage 71
7.5.3 Insert the function disc 71
7.5.4 Setting the grinding angle 72
7.5.5 Mounting the grinding plate SP 107 72
7.5.6 Clamping the linear cutter knife 73
7.5.7 Basic function of the locking mechanism of the grinding and polishing unit 74
7.5.8 Bringing the grinding and polishing unit into the adjustment position 75
7.5.9 Aligning the linear cutter knife on the wet-grinding belt 76
7.5.10 Grinding the linear cutter knife 77
7.5.11 Polishing and deburring the linear cutter knife 79
7.6 Grinding hand knives on the wet-grinding belt (S 20 | S 20 B) 84
7.7 Dressing the grinding wheel (S 20) 86
7.8 Adjusting the grinding wheel guard (S 20) 88
7.9 Changing the grinding wheel (S 20) 89
7.10 Changing the wet-grinding belt 90
7.11 Adjusting the belt movement 92
7.12 Changing the finned brushes 93
7.13 Circular knife grinding attachment HV 25-1 (optional S 20) 95
7.14 Circular knife grinding attachment HV 25-2 (optional S 20) 96
8. Care and maintenance 97
8.1 Cleaning 97
8.1.1 Lubricant table 97
8.2 Maintenance plan (one-shift operation) 97
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9. Disassembly and disposal 98
9.1 Disassembly 98
9.2 Disposal 98
10. Service, spare parts and accessories 99
10.1 Postal address 99
10.2 Service 99
10.3 Spare parts 99
10.4 Accessories 100
10.4.1 Abrasives used, etc. 100
11. Appendix 101
11.1 EU Declaration of Conformity 101
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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 Universal
Wet-Sharpening Machine, hereafter referred to as the grinding machine, and to properly utilize
its features.
These operating instructions contain important notes on how to operate the grinding machine
safely, properly, and efficiently. Observing these instructions helps to avoid hazards, reduce repair
costs and downtimes, and to increase the reliability and service life of the grinding machine.
The operating instructions must always be stored in the location that the grinding machine is
used.
The operating instructions must be read and applied by every person tasked with working with
the grinding 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 grinding 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
1.3.1 Warning and mandatory signs on/in the grinding machine
The following warnings and mandatory signs have been affixed on/in the grinding machine:
CAUTION! DANGEROUS ELECTRICAL VOLTAGE
(warning sign on switch housing)
The grinding machine carries life-threatening voltage when it is
connected to the current supply.
Current-carrying device parts may only be opened by authorized
personnel.
The grinding machine must be separated from the mains supply
before carrying out servicing, maintenance and repair work on it.
CAUTION! RISK OF INJURY FROM ABRASIVE PARTICLES
(mandatory sign on machine front)
Grinding, polishing, deburring and dressing gives rise to grinding
particles which can enter the eyes.
Wearing eye protection is mandatory when carrying out such
work.
1.3.2 General mandatory signs
The following general mandatory signs must be followed:
CAUTION! RISK OF INJURY FROM KNIFE
Working with the grinding machine involves grinding knives that
could cause serious cut injuries due to their sharpness.
Protective gloves must be worn when clamping and releasing
knives.
Caution when transporting blades. Use the protective equipment
provided by the knife manufacturer. Protective gloves and safety
shoes must be worn.
1. Important notes

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1.4 Rating plate and machine serial number
The rating plate (1-1/1) is located on the rear
panel of the machine.
The machine serial number can be found on the
rating plate and on the right side wall underneath
the wet-grinding belt.
1.5 Figure and position numbers in the operating instructions
If the text makes a reference to a machine component depicted in a figure, the figure and posi-
tion number will be given in parentheses.
Example: (6-2/1) means figure number 6-2, position 1.
Check the direction of rotation of the finned brushes.
The direction arrow (6-2/1) indicates the direction of
rotation of the wet-grinding belt and finned brushes.
If the finned brushes are rotating in the right direction,
then the direction of rotation of the grinding wheel and
of the wet-grinding belt is also correct.
If the finned brushes are rotating in the wrong direction,
have the phase reversed by a qualified electrician.
1. Important notes
Figure 1-1 Rating plate
Figure 1-2 Machine serial number
Figure 6-2 Checking the direction of rotation
1
1
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 uninterrupted operation of this grinding machine
is knowledge of the basic safety instructions and regulations.
• These operating instructions contain important notes on how to operate the grinding machine
safely.
• All persons carrying out work on the grinding 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 grinding machine, who
• are familiar with the occupational safety and accident prevention regulations and have received
instruction in handling the grinding 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 grinding 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 grinding machine
The grinding 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 grinding machine or other
property.
2. Safety