KNECHT E 50 R User manual
Status 02.2020 ■Version 1.0 | Translation
Operating Instructions
E 50 R
Fully Automatic Hand Knife Sharpening Machine
3
Fully Automatic Hand Knife Sharpening Machine E 50 R
Manufacturer
KNECHT Maschinenbau GmbH
Witschwender Straße 26
88368 Bergatreute
Germany
Phone +49-7527-928-0
Fax +49-7527-928-32
www.knecht.eu
Documents for machine operator
Operating instructions
Date of issue of the operating instructions
February 14, 2020
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 prohibitory signs on the grinding machine 8
1.3.2 General mandatory signs 8
1.4 Rating plate and serial number 9
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 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 purpose 17
3.2 Technical specifications 17
3.3 Functional description 18
3.4 Description of components 19
3.4.1 Control panel 21
3.4.2 Switching the grinding machine on/ off 21
3.4.3 Layout of user interface (main screen) 22
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 Initial start-up of the grinding machine 26
6. Commissioning 27
7. Operation 29
7.1 Grinding hand knives 29
7.2 Changing the wet-grinding belt 31
7.2.1 Adjusting the wet-grinding belt 33
7.3 Changing the polishing / deburring rings and polishing paste 36
7.4 Adjusting the polishing / deburring ring 38
7.5 Changing the test medium of the sharpness testing device 39
7.6 Replacing the coolant 40
8. Control 41
8.1 Manual functions 41
8.2 Setting the language 43
8.3 Loading product data 45
8.4 Changing product data 46
8.5 Setting up an internet connection 47
9. Care and maintenance 48
9.1 Lubrication 48
9.1.1 Lubrication schedule and lubricant table (one-shift operation) 48
9.2 Cleaning 49
9.3 Maintenance plan (one-shift operation) 52
Table of Contents
7
1.1 Preface to the operating instructions
These operating instructions are intended to make it easy to learn how to use the fully automatic
hand knife 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. Your attention 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 safe-
ty 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 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
8
1.3 Warning signs and what they mean
1.3.1 Warning and prohibitory signs on the grinding machine
The following warning and prohibitory signs are located on/in the grinding machine:
CAUTION! DANGEROUS ELECTRICAL VOLTAGE
(warning notice on the switch cabinet)
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.
1.3.2 General mandatory signs
The following general mandatory signs must be followed:
CAUTION! RISK OF INJURY FROM ABRASIVE PARTICLES
Eye protection must be worn for general maintenance and
cleaning work.
CAUTION! RISK OF INJURY FROM KNIFE
Working with the grinding machine means grinding knives that
could cause serious cut injuries due to their sharpness.
Protective gloves must be worn when inserting and removing
knives.
Caution when transporting blades. Use the protective equipment
provided by the knife manufacturer. Wear safety shoes and safety
apron.
1. Important notes
9
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 gripper.
1. Important notes
Figure 1-1 Rating plate
Figure 1-2 Machine serial number
10
1.5 Figure and position 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: (7-18/1) means Figure number 7-18, position 1.
To replace the polishing pastes, loosen the four star han-
dles (7-18/1) on the side and remove the cover (7-18/2).
The used paste can now be replaced with new paste.
Mount the cover again and tighten the four star handles.
1. Important notes
Figure 7-18 Replacing the polishing paste
1
2
1
1
1
11
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.
2. Safety
12
2. Safety
Malfunctions that may impair safety are to be rectified immediately.
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 im-
mediately 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 suitable for grinding, deburring, and polishing hand knives
(70-270 mm in length). All knives must be inserted into the provided knife magazine.
Any other use is considered to be improper. The company KNECHT Maschinenbau GmbH is not
liable for any damage arising from this. 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:
• fixtures are not properly attached.
• knives are sharpened/polished in the opposite direction of the cutting edge on the grinding belt
or the polishing ring.
• work pieces other than hand knives are ground.
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 aspects such as drive conditions (power and speed)
13
• 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. 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
14
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 permitted to activate the machine.
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 present (including those of the operating behavior) to the responsible office
or person. 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 re-
start. 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 systems or operating materials may only be performed by a qualified electri-
cian, in accordance with electrical regulations.
Defects such as damaged cables, cable connections, etc., must be rectified immediately by an
authorized specialist.
Cables marked in yellow are carrying voltage even when the main switch
is in the off position.
CAUTION
2.4.8 Particular hazard zones
If the knife gripper is being used manually, there is a pinching hazard from the gripper.
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 per-
mission of the manufacturer. This also applies for installation and configuring the safety devices.
Any conversion work requires the written permission from 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 environmen-
tally-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. Observe
special instructions 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 suffi-
cient load-bearing capacity. Designate suitable lifting devices for the lifting process.
Ensure that only persons authorized to carry out this work are located where the machine is un-
loaded and installed.
2. Safety
16
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 suitable attachment points. When
recommissioning, do so only in accordance with the operating instructions.
2. Safety
17
3. Description
3.1 Intended purpose
The E 50 R fully automatic hand knife grinding machine grinds, deburrs, and polishes hand knives
with a length of 70-270 mm.
3.2 Technical specifications
Height ������������������������������������������������������������ approx. 2055 mm
Width ������������������������������������������������������������� approx. 2580 mm
Depth ������������������������������������������������������������� approx. 2707 mm
Space requirement (BxDxH) ����������������������� approx. 4000 mm x 3000 mm x 2100 mm
Allowable room temperature ������������������������������������������������� 10-35°C
Allowable air humidity ������������������������������������������������������� 20 - 80%
Weight ��������������������������������������������������������������������� 1200 kg
Current supply* ������������������������������������������������������������ 3x 400 V
Mains frequency* ���������������������������������������������������������� 50/60 Hz
Output* ���������������������������������������������������������������������� 8 KW
Energy consumption* ����������������������������������������������������������� 11 A
Back-up fuse ������������������������������������������������������������������� 25 A
Control voltage �������������������������������������������������������������� 24 V DC
Measured A-evaluated emission sound pressure level ����������������������������� 72 dB (A)
at workstation LpA**
Compressed air connection �������������������������������������������������� 6-6.5 bar
Air consumption �������������������������������������������������������� max. 50 l / min
Diameter of polishing ring ����������������������������������������������������� 180 mm
Speed of polishing ring ��������������������������������������������������� 1500 1/min
Diameter of deburring ring ���������������������������������������������������� 180 mm
Speed of deburring ring ��������������������������������������������������� 1500 1 / min
Speed of wet-grinding belt ������������������������������������������������ 1500 1/min
Maximum knife length �������������������������������������������������������� 270 mm
2055 mm
2580 mm
2707 mm
2055 mm
2580 mm
2707 mm
18
Figure 3-1 Dimensions in mm
3. Description
Suction capacity ������������������������������������������������������� max. 300 m³ / h
Particle diameter of cartridge filter ����������������������������������������������� 3.2 µm
*) This information may change depending on the electrical supply.
**) Two-digit sound emission value per EN ISO 4871 (measurement uncertainty kPa 3 dB(A)) Emission sound
pressure level per EN ISO 11201.
A hand knife (Ergogrip) from the company Dick was ground.
3.3 Functional description
The E 50 R fully automatic hand knife grinding machine is used to grind, deburr, and polish hand
knives.
The hand knives are inserted into the knife magazine. After starting, the knife gripper grabs and
measures the first knife then sharpens it at the grinding or polishing station. After the grinding
process is complete, the knife is replaced in the magazine and the next one is processed.
In the event of an emergency, the hand knife grinding machine can immediately be stopped by
pressing the “Emergency Stop” button.
CoG CoG
19
3. Description
3.4 Description of components
1 Protection doors
2 Knife magazine
3 Magazine trolley
4 Controller and switch cabinet
5 Water tray
6 Adjustable machine feet
1
2
3
6
5
1
4
Figure 3-2 Overall view of grinding machine
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3. Description
1 Robot
2 Knife gripper
3 Sharpness testing device (optional)
4 Polishing unit
5 Suction unit
6 Measuring device
7 Deburring unit
8 Grinding unit
Figure 3-3 Interior
4
5
3
1
7
68
2
21
3.4.1 Control panel
1 Touchpanel
2 “Emergency off” button
3 “Controller on” button: activates controller
(when button flashing)
4 “Start/Stop” button: starts/stops grinding
program
5 “Coolant on/off”: switches coolant pump
on/off (for cleaning)
6 USB port
7 “Servicing on/off” key switch: position
“1” for setup mode, position “0” for
automatic mode
8 ON/OFF main switch
9 “Lockout tagout”: (only on machines for
the USA)
3.4.2 Switching the grinding machine on /off
Turning the main switch (3-5/1) from “0” to “I”
switches on the grinding machine.
Turning the main switch (3-5/1) from “I” to “0”
switches off the grinding machine.
3. Description
Figure 3-4 Control panel
Figure 3-5 Main screen
1
2
8
9
1
3 4 5 76
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