KNECHT A950 II User manual

Grinding Machine for Sickle-shaped and Circular Knives
Operating Instructions
A 950 II
Status 08.2018 ■Version 1.3 |Translation

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Grinding Machine for Sickle-shaped and Circular Knives A 950 II
Manufacturer
KNECHT Maschinenbau GmbH
Witschwender Straße 26
88368 Bergatreute
Germany
Phone [phone]
Fax [phone]
[email protected]
www.knecht.eu
Documents for the machine operator
Operating instructions
Date of issue of the operating instructions
August 22, 2018
Copyright
The copyright for these operating instructions and documents is held by KNECHT Maschinenbau GmbH.
These documents will be delivered only to our customers and to operators of our products and are a part of
the machine.
These documents may neither be reproduced, nor made accessible to third parties, including rival firms,
without our express permission.
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 what they mean 8
1.3.1 Warning and prohibition signs on the grinding machine 8
1.3.2 General prohibitions 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 Malfunction 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 modules 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

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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 grinding wheel 40
7.4 Changing the front/rear grinding wheels 42
7.5 Adjusting the grinding angle 44
8. Control system 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 50
8.5 Axes in manual mode 51
8.6 Manual functions 53
8.6.1 General 53
Table of contents

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8.6.2 Grinding wheel front 54
8.6.3 Grinding wheel rear 54
8.6.4 Knife assembly 54
8.7 Machine data 56
8.7.1 General 56
8.7.2 Options 57
8.7.3 Holder 57
8.7.4 Tools – Grinding wheel front/rear 57
8.8 Message texts 58
8.9 Options 59
8.10 Language 60
8.11 Setting up an internet connection 61
9. Care and maintenance 62
9.1 Coolant 62
9.2 Lubricate cross table 62
9.3 Clean grinding machine 63
9.4 Other lubrication points 63
10. Malfunctions 64
10.1 Faults 64
11. Disassembly and disposal 65
11.1 Disassembly 65
11.2 Disposal 65
12. Service, spare parts and accessories 66
12.1 Postal address 66
12.2 Service 66
12.3 Spare parts 66
12.4 Accessories 67
12.4.1 Abrasives used 67
13. Appendix 68
13.1 EC Declaration of Conformity 68
Table of contents

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1.1 Preface to the operating instructions
These operating instructions are designed to make it easier for users to familiarize themselves
with the grinding machine for sickle-shaped and circular Knives, also referred to in the following
as “the grinding machine” and use it for its 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 ma-
chine 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. those entrusted with:
• transportation, installation, commissioning
• operation, including fault elimination in the process flow
• servicing (maintenance, repair)
In addition to the operating instructions and the binding accident prevention regulations applica-
ble in the country and place in which the machine is used, generally acknowledged technological
rules with regard to safe and professional work practices are to be observed.
1.2 Warnings and symbols in the operating instructions
It is essential to observe the following symbols/designations used in the operating instructions.
The hazard triangle with the signal word “CAUTION” is used as a work
safety indication for all work which might result in death or physical injury.
Special care and caution must be taken when carrying out such work.
ATTENTION
”ATTENTION” is used to draw attention to particular points in order to
avoid damage and/or destruction of the grinding machine and its environ-
ment.
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)
When connected to the voltage supply (3x 400 V), the grinding
machine becomes electrically live and touching its live parts directly
can be life-threatening.
Live machine parts may be opened only by authorized, trained
personnel.
The grinding machine must be disconnected 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)
Work on the grinding machine involves grinding knives which
could cause serious cut injuries due to the sharp blades.
Wearing protective gloves is mandatory when carrying out such
jobs.
Be careful when transporting blades! Use the protective devices
provided by the knife manufacturer. Wear protective gloves and
apron.
1.3.2 General prohibitions signs
The following general mandatory signs must be observed:
CAUTION! RISK OF INJURY DUE FROM ABRASIVE PARTICLES
DURING DRESSING
Dressing the grinding wheel gives rise to abrasive particles which
can enter the eyes.
Wearing safety glasses is mandatory when carrying out such jobs.
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 serial number is located on the rating plate
and on the front left of the machine.
1. Important notes
Figure 1-2 Serial number
Figure 1-1 Rating plate

Figure 7-25 Change grinding wheels
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1.5 Figure and item numbers in the operating instructions
If the text refers to a machine component shown in a figure, a figure or item number is added in
brackets after the machine component.
Example: (7-25/1) denotes 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 con-
nection 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 safe handling and trouble-free operation of this grinding machine is
familiarity with the basic safety instructions and regulations.
• This user manual contains important notes on how to operate the grinding machine safely.
• This user manual, in particularly the safety notes, is to be read by all those who work at the
grinding machine.
• 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 been
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.
Checks are also carried out at regular intervals to ensure that the personnel are fulfilling their
obligation to observe safety at work.
2.1.3 Obligation on the part of the personnel
All personnel working on the grinding machine undertake 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 established
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 parties, or impairment of the grinding machine or other
property. The grinding machine may only be used:
• for its intended purpose
• in faultless condition with regard to safety-related aspects
Faults that might impair safety must be eliminated immediately.
2. Safety

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2. Safety
2.1.5 Malfunction
If any safety-relevant malfunction occurs in the grinding machine or if the processing response
indicates that such malfunction may have occurred, the grinding machine must be stopped imme-
diately until such time as the malfunction has been detected and eliminated.
Malfunctions may only be eliminated by authorized specialists.
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 improper use. KNECHT Maschinenbau GmbH assumes no liability for
damages resulting from improper use. The user alone bears the risk in such cases.
Use as intended includes the observance of all the instructions in the operating instructions.
The grinding machine is being used improperly if, for example:
• the slicer knife is removed without the cam disc
• attachments are not properly mounted
2.3 Warranty and liability
Warranty and liability claims in case of personal injuries 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)
• insufficient monitoring of machine parts that are exposed to wear
• use of unapproved replacement and wear parts

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Use only original replacement and wear parts. If parts are purchased from external suppliers, there
is no guarantee that they are designed and manufactured to withstand the required level of stress
and provide the required level of safety.
2.4 Safety regulations
2.4.1 Organizational measures
All available safety devices must be checked 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, care must be taken to ensure that all protective
equipment is properly mounted and functional.
Protective equipment may be removed only after the machine has stopped and has been secured
against accidental restarting of the grinding machine.
If sub-components are supplied, the protective equipment must be correctly attached by the
operator according to the instructions.
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. The minimum legal
age for employment must be observed.
The responsibilities of the personnel must be clearly assigned, i.e. commissioning, operation,
maintenance and repair, etc.
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 himself are excluded from this prohibition (e.g. setting the number of cycles).
Only trained and instructed personnel are allowed to activate the control unit.
2.4.6 Safety measures in normal operation
Refrain from any method of working which may pose a risk to safety. 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) immediately to the department/person
in charge. Where required, shut down the grinding machine immediately and secure against
restarting.
Before switching on the grinding machine, ensure that no one is exposed to any risk from the
start-up of the machine.
If there are any functional faults, stop the machine immediately and secure against restarting.
Have the faults eliminated 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 immediately be rectified by an
authorized electrician.
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). Suitable personal protective equipment must be worn.
2. Safety

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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 starting repair work. A responsible supervisor must be appointed.
For all service work, the grinding machine is to be disconnected from the power supply and
secured against accidental restarting. Pull out the mains plug. Cordon off the servicing area as
far as possible.
After completion of the maintenance work and fault rectification, install all the safety devices and
check whether 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 per-
mission of the manufacturer. This also applies to the installation and adjustment of safety devices.
No alterations may be carried out without the prior written approval of KNECHT Maschinenbau
GmbH.
Immediately replace machine parts which are not in perfect condition.
Only use original replacement and wear parts. If parts are purchased from external suppliers, there
is no guarantee that they are designed and manufactured to withstand the required level of stress
and provide the required level of safety.
2.4.11 Cleaning the machine
Cleaning agents and materials used must be handled properly and disposed of in an environ-
ment-friendly manner.
Ensure that wear and replacement parts are disposed of in a safe and environmentally friendly
way.
2.4.12 Oils and greases
When handling lubricants/oils and greases, follow the safety regulations for the product. Observe
special instructions for the foodstuffs sector.
2.4.13 Relocation of the grinding machine
Even when moving the machine a short distance from its site, disconnect it from all external
power supply sources. Before restarting the machine, connect it properly to the current supply.
When loading or unloading, only use hoisting and load lifting equipment with sufficient
load-bearing capacity. Appoint a qualified banksman (signaler) for the lifting process.
No persons other than those entrusted with this work may be present in the loading and
installation area.
2. Safety

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Only lift the grinding machine correctly with hoisting gear in accordance with the operating
instructions (attachment points for hoisting equipment, etc.). Only use suitable transport vehicles
with sufficient load-bearing capacity. Attach the load securely. Use appropriate attachment points
(Chapter 4.1). When putting in operation again, proceed only as instructed in the operating
instructions.
2. Safety

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3. Description
3.1 Intended use
The grinding machine for sickle-shaped and circular knives A 950 II 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 ������������������������������������������������������������������� 1832 mm
Width �������������������������������������������������������������������� 1709 mm
Depth ���������������������������������������������������������������������� 997 mm
Required space (BxD) ������������������������������������������������� 2500 x 2000 mm
Weight ���������������������������������������������������������������������� 400 kg
Power 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
*) Dual number noise 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).

1709 mm
1832 mm
997 mm
1709 mm
1832 mm
997 mm
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Figure 3-1 Dimensions in mm
3. Description
GoC
GoC
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 case of emergency, the grinding machine can immediately be stopped by pressing the
“Emergency Stop” button

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3. Description
3.4 Description of modules
1 Hand wheel for grinding depth
2 Grinding unit
3 Water tray
4 Control unit with control panel
5 Cam disc SP 116 (with knive)
6 Water regulator
7 Machine feet
Figure 3-2 General view of grinding machine
1
2
3
6
7
4
5

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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
3
6
7
4
4
5
4
2
3

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1 Cylinder knife assembly 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 Front grinding wheel clamp
4 Rear grinding wheel clamp
5 Maintenance unit
6 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
2
4 5
1
3
6
4
3
2
1
1