KNECHT A 950 III Operating Instructions Manual
Sickle and Circular Knife Grinding Machine
Operating Instructions
A 950 III
Status 10.2018 ■ Version 1.0 | Translation
3
Sickle and Circular Knife Grinding Machine A950 III
Manufacturer
KNECHT Maschinenbau GmbH
Witschwender Straße 26
88368 Bergatreute
Germany
Phone +49 -7527-928-0
Fax +49 -7527-928-32
mail@knecht.eu
www.knecht.eu
Documents for machine operator
Operating Instructions
Date of issue of the Operating Instructions
October 30, 2018
Copyright
The copyright for these Operating instructions as well as other documents for the machine operator is held
by KNECHT Maschinenbau GmbH. They are provided only to customers and operators of our products and
are included with the machine.
These documents may neither be reproduced, nor made accessible to third parties, in particular rival firms,
without our express permission.
Operating Instructions
4
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 what they mean 8
1.3.1 Warning and prohibition signs on the grinding machine 8
1.3.2 General prohibition signs 8
1.4 Rating plate and serial number 9
1.5 Figure and item 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 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 zones 14
2.4.9 Servicing (maintenance, repair) and fault elimination 15
2.4.10 Structural modifications to the grinding machine 15
2.4.11 Cleaning the machine 15
2.4.12 Oils and greases 15
2.4.13 Relocation of the grinding machine 15
3. Description 17
3.1 Intended use 17
3.2 Technical specifications 17
3.3 Functional description 18
3.4 Description of components 19
3.4.1 Switching the grinding machine on / off 21
3.4.2 Control panel 22
3.4.3 Layout of user interface (main screen) 23
Table of Contents
5
4. Transport 24
4.1 Means of transport 24
4.2 Transport damage 24
4.3 Transport to another installation site 24
5. Installation 25
5.1 Selection of qualified personnel 25
5.2 Installation site 25
5.3 Supply connections 25
5.4 Settings 25
5.5 Using the grinding machine for the first time 26
6. Commissioning 27
7. Operation 29
7.1 Switch on the grinding machine 29
7.2 Grind knives 29
7.2.1 Load grinding program 29
7.2.2 Mount cam disc SP 116 30
7.2.3 Grind the slicer knife without suspension attachment 33
7.2.4 Grinding the slicer knife with suspension attachment 35
7.2.5 Grind circular knives 37
7.2.6 Set the knife at the center of the disc 39
7.3 Dressing the front / rear ceramic grinding wheels 40
7.4 Changing the front / rear grinding wheels 42
7.5 Adjusting the grinding angle 44
8. Control 45
8.1 Main screen 45
8.2 Grinding program 46
8.3 Grinding data 47
8.3.1 Data 48
8.3.2 Abrasives 48
8.3.3 Steps 48
8.4 Settings 49
8.5 Axes in manual mode 50
8.6 Manual functions 51
8.6.1 General 51
Table of Contents
6
8.6.2 Front grinding wheel 52
8.6.3 Rear grinding wheel 52
8.6.4 Knife holder 52
8.7 Machine data 54
8.7.1 General 54
8.7.2 Options 55
8.7.3 Support 55
8.7.4 Tools – Grinding wheel front / rear 55
8.8 Error messages 56
8.9 Options 57
8.10 Language 58
8.11 Setting up an internet connection 59
9. Care and maintenance 60
9.1 Coolant 60
9.2 Lubricate cross table 60
9.3 Clean grinding machine 61
9.4 Other lubrication points 61
10. Malfunctions 62
10.1 Malfunctions 62
11. Disassembly and disposal 63
11.1 Disassembly 63
11.2 Disposal 63
12. Service, spare parts and accessories 64
12.1 Postal address 64
12.2 Service 64
12.3 Spare parts 64
12.4 Accessories 65
12.4.1 Abrasives used 65
13. Annex 66
13.1 EC Declaration of Conformity 66
Table of Contents
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1.1 Preface to the operating instructions
These Operating instructions are meant to make it easier to get to know the sickle and circular
knife grinding machine, also referred to in this document as “grinding machine”, and to use it
properly for the intended purpose. The term “knife” can also be used for the term “slicer knife”.
The operating instructions contain important information on how to operate the grinding machine safely, properly and cost-effectively. Observance of these instructions helps avoid hazards,
reduce repair costs and downtimes, and increase the reliability and service life of the grinding
machine.
The operating instructions must always be accessible at the place of use of the grinding machine.
The operating instructions must be read and used by all persons entrusted with working on the
grinding machine, e.g.:
• transportation, installation, commissioning
• operation, including fault elimination in the process flow
• upkeep (maintenance, repair).
In addition to the operating instructions and the binding accident prevention regulations applicable in the country and place of use of the machine, the generally acknowledged rules of technology with regard to safe and professional work practices are to be observed.
1.2 Warnings and symbols in the operating instructions
Heeding the following safety alert symbols / designations used in the operating instructions is
absolutely necessary:
The hazard triangle with the signal word “CAUTION” is a work safety
indicator for all work for which there is a risk of serious or fatal injury.
Special care and caution must be exercised when carrying out such work.
ATTENTION
”ATTENTION” is used to draw attention to particular points in order
to avoid damage to and / or destruction of the grinding machine and its
environment.
NOTICE
”NOTICE” refers to user tips and especially useful information.
1. Important notes
CAUTION
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1.3 Warning signs and what they mean
1.3.1 Warning and prohibition signs on the grinding machine
The following warning and prohibition signs have been affixed to the grinding machine:
CAUTION! DANGEROUS ELECTRICAL VOLTAGE
(warning notice on the control panel)
On being connected to the current supply (3x 400 V), the grinding
machine becomes electrically live and touching its live parts directly
could be life-threatening.
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 KNIFE
(prohibition sign on the base plate)
Working with the grinding machine involves grinding knives that
could cause serious cut injuries due to their sharpness.
Wearing protective gloves is mandatory when carrying out such
work.
Caution when transporting blades! Use the protective equipment
provided by the knife manufacturer. Wear safety shoes and safety
apron.
1.3.2 General prohibition signs
The following general mandatory signs must be followed:
CAUTION! RISK OF INJURY DUE FROM ABRASIVE PARTICLES
DURING DRESSING
Dressing the cup grinding wheel gives rise to grinding particles
that could enter the eyes.
Wearing protective goggles is mandatory when carrying out such
work.
1. Important notes
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1.4 Rating plate and serial number
The rating plate is located on the right side of the
machine behind the switch cabinet.
The machine serial number is located on the rating
plate and on the front left of the machine.
1. Important notes
Figure 1-2 Machine serial number
Figure 1-1 Rating plate
Figure 7-25 Change grinding wheels
1
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1.5 Figure and item numbers in the operating instructions
If there is a reference to a machine component in the text which is depicted in an image, the
figure and item number will be given in parentheses.
Example: (7-25/1) means Figure number 7-25, item 1.
Use SW6 Allen wrench to loosen and remove the screw
at the center of the grinding wheel (7-25/1) by turning it
counter-clockwise.
Remove the front or rear grinding wheel and also the connection flange (7-26/1) if necessary and mount the new
grinding wheel in the reverse order.
1. Important notes
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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-related work of personnel 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 of this.
2.1.4 Hazards involved in handling the grinding machine
The grinding machine has been built to the latest technological standards and the acknowledged
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 impairment of the grinding machine or other
property. The grinding machine may be used only:
• for its intended purpose
• in faultless condition with regard to safety-related aspects.
Malfunctions that may impair safety are to be rectified immediately.
2. Safety
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2. Safety
2.1.5 Malfunctions
If safety-relevant malfunctions occur with the grinding machine, or if the processing behavior
indicates that such malfunctions may have occurred, the grinding 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 grinding machine is only designed for grinding slicer knives. Before starting work on a slicer
knife, a check must first be carried out as to whether the slicer knife fits onto the cam disc Only
then may the slicer knife be clamped onto the cam disc.
Any other use is considered to be improper. KNECHT Maschinenbau GmbH assumes no liability for
damages resulting from improper use. The user alone bears this risk.
Use as intended includes the observance of all the notes in the operating instructions.
The grinding machine is being used improperly if, for example:
• the slicer knife is removed without the cam disc
• fixtures are not properly attached.
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 grinding machine
• improper transportation,commissioning, operation and maintenance of the grinding machine
• operating the grinding 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 grinding machine
• unauthorized structural alterations to the grinding machine
• unauthorized modification of such aspects as drive conditions (power and speed)
• failure to monitor machine parts that are subject to wear
• use of unapproved replacement and wear parts.
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Use only original replacement and wear parts. When using external parts, it cannot be guaranteed
that they are constructed and manufactured to be suitable and safe.
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 commissioning the grinding machine, ensure that all protective equipment is properly
mounted and in functional condition.
Protective equipment may be removed only after the grinding machine has stopped and has been
secured against accidental restart.
When subcomponents are provided, 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 grinding
machine. In addition to the operating instructions, the generally applicable as well as the locally
relevant accident prevention regulations must also be made available and observed.
All safety alert symbols and danger warnings on the grinding machine must be complete and
clearly legible.
2.4.4 Selection and qualification of personnel
Only trained and instructed personnel may work on the grinding machine. Observe the legally
permitted minimum age!
The responsibilities of personnel with respect to commissioning, operation, maintenance, and
repair must be clearly specified.
Personnel still undergoing training or instruction may only work on the grinding machine under
the permanent supervision of an experienced person!
2. Safety
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2.4.5 Machine control system
Do not make any changes to the software program under any circumstances. Parameters that the
operator can set themselves are excluded from this prohibition (e.g. setting the number of cycles).
Only trained and instructed personnel are allowed to activate the control.
2.4.6 Safety measures in normal operation
Do not operate the machine in any unsafe manner. Only operate the grinding machine if all the
safety devices are installed and fully functional.
Check the grinding machine for external signs of damage and correct operation of the safety
devices at least once every shift.
Report any changes (including operating behavior) to the department / person in charge immediately. If necessary, shut down the grinding machine and secure it against restart.
Before activating the grinding machine, ensure that no one will be injured by the start-up of the
machine.
In the event of a malfunction, immediately stop the grinding machine and secure it against restart. Rectify malfunctions immediately.
2.4.7 Hazards due to electrical power sources
The switch cabinet must always remain secured against access. Only authorized personnel must
be allowed to access it.
Work on electrical units or operating materials may only be performed by a qualified electrician
in accordance with electrical rules.
Defects, such as damaged cables, cable connections etc. must be immediately rectified by an
authorized specialist.
Cables marked in yellow are electrically live even when the main switch
is in the off position.
CAUTION
2.4.8 Particular hazard zones
In the area of the grinding wheels, there is a danger of pinching and being drawn in (e.g. clothing, fingers and hair). Wear suitable personal protective equipment.
2. Safety
15
2.4.9 Servicing (maintenance, repair) and fault elimination
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 upkeep work, the grinding machine is to be disconnected from the power supply and
secured against accidental restart. Remove power plug. Cordon off the maintenance area where
required.
After completing maintenance work and fault rectification, install all safety devices and verify that
they are fully functional.
2.4.10 Structural modifications to the grinding machine
Modifications, retrofitting or rebuilds of the grinding machine are not allowed without the permission of the manufacturer. This also applies for installation and configuring the safety devices.
No alterations may be carried out without the prior written approval of KNECHT Maschinenbau
GmbH.
Immediately replace any machine parts that are not in a serviceable state.
Use only original replacement and wear parts. When using external parts, it cannot be guaranteed
that they are constructed and manufactured to be suitable and safe.
2.4.11 Cleaning the machine
Handle any cleaning agents and materials used properly and dispose of them in an environmentally-friendly manner.
Dispose of parts subject to wear and replacement parts in a safe and environmentally-friendly
manner.
2.4.12 Oils and greases
When using lubricants and grease, follow the safety provisions applicable to the product. Comply
with the special regulations for the foodstuffs sector.
2.4.13 Relocation of the grinding machine
Disconnect the grinding machine from any external power, even if adjusting its position slightly.
Before restarting the grinding machine, properly connect it to the power supply.
When loading or unloading, only use suspension devices and load suspension devices with sufficient load-bearing capacity. Designate suitable lifting devices for the lifting process.
Ensure that no one, who is not certified for this work, is located where the machine is unloaded
and installed.
2. Safety
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Only lift the grinding machine correctly with a suspension device in accordance with the operating
instructions (attachment points for load suspension devices, etc.). Use only a suitable transport
vehicle with sufficient carrying capacity. Secure loads safely. Use appropriate attachment points
(Chapter 4.1). When recommissioning, do so only in accordance with the operating instructions.
2. Safety
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3. Description
3.1 Intended use
The sickle and circular knife grinding machine A 950 III grinds slicer knives (sickle-shaped or
circular) up to a maximum size of 900 mm. It is not suitable for grinding other types of knife
such as hand knives.
3.2 Technical specifications
Height ������������������������������������������������������������������� 1882 mm
Width �������������������������������������������������������������������� 1669 mm
Depth �������������������������������������������������������������������� 1043 mm
Space required (BxD) ������������������������������������������������� 3000 x 2800 mm
Weight ��������������������������������������������������������������� approx. 400 kg
Current supply ������������������������������������������������������������� 3x 400 V
Mains frequency ��������������������������������������������������������������� 50 Hz
Output ���������������������������������������������������������������������� 0.5 kW
Power consumption ����������������������������������������������������������� 1.9 kW
Energy consumption ������������������������������������������������������������� 4 A
Back-up fuse ������������������������������������������������������������������� 16 A
Control voltage ������������������������������������������������������������ + 24 V DC
Compressed air ������������������������������������������������������� 6 bar (50 l / min)
Measured A-evaluated emission sound pressure level ����������������������������� 72 dB (A)
at workstation LpA**
Speed of grinding wheels, front / rear ������������������������������������������� 255 rpm
Grinding wheel A ������������������������������������������������������ d.100xd.40x60
*) Two-digit sound emission value information according to EN ISO 4871
Emission sound pressure level according to EN ISO 11201 Uncertainty KpA in decibels: 3
A slicer knife was ground (type known to KNECHT Maschinenbau GmbH).
1669 mm
1882 mm
1043 mm
1043 mm
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Figure 3-1 Dimensions in mm
3. Description
CoG
CoG
3.3 Functional description
The grinding machine can be used to automatically sharpen slicer knives (sickle-shaped or circular
knives) with a size of maximum 900 mm.
The slicer knife is clamped onto a cam disc and sharpened along the knife edge by the grinding
wheel precisely according to its shape.
In the event of an emergency, the grinding machine can immediately be stopped by pressing the
“Emergency Stop” button
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3. Description
3.4 Description of components
1 Hand wheel for grinding depth
2 Grinding unit
3 Water tray
4 Control unit with control panel
5 Cam disc SP 116 (with knife)
6 Machine feet
1
2
3
6
4
5
Figure 3-2 General view of grinding machine
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3. Description
1 Grinding wheel (rear)
2 Angle adjustment scale
3 Coolant hose
4 Inductive switch
5 Drive pinion of cam disc
6 Grinding wheel (front)
7 Cam disc drive (servo motor)
Figure 3-3 Grinding unit
1
6
7
4
4
4
5
2
3
3
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1 Cylinder knife package up / down
2 Z coupling
3 Cam disc bracket
4 Cylinder for pressing on cam disc
1 Pressure on front grinding wheel
2 Pressure on rear grinding wheel
3 Maintenance unit
4 Cam disc pressure
3.4.1 Switching the grinding machine on / off
1 Main switch
Turning the main switch from “0” to “I” switches
on the grinding machine.
Turning the main switch from “I” to “0” switches
off the grinding machine.
3. Description
Figure 3-4 Cam disc bracket
Figure 3-5 Pneumatic cabinet
Figure 3-6 Main switch
4
3
2
1
2
3
1
4
1
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