KNECHT B 500 User manual

Status 05.2019 Version 1.2 | Translation
Operating Instructions
B 500
Automatic Grinding and Polishing Machine

3
Automatic Grinding and Polishing Machine B 500
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
May 07, 2019
Copyright
The copyright for these operating instructions as well as other documents for the machine operator is held
by KNECHT Maschinenbau GmbH. These documents will be delivered only to our customers and to opera-
tors 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 Foreword 7
1.2 Warnings and symbols in the operating instructions 7
1.3 Warning labels on the grinding machine and their meanings 8
1.4 Rating plate and machine 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 Operator's duty 11
2.1.3 Obligations on the part of the personnel 11
2.1.4 Hazards associated with handling the machine 11
2.1.5 Malfunctions 12
2.2 Use as intended 12
2.3 Warranty and Liability 12
2.4 Safety regulations 13
2.4.1 Organizational measures 13
2.4.2 Protective devices 13
2.4.3 Informal safety measures 13
2.4.4 Selection and qualifications of the personnel 13
2.4.5 Machine control system 14
2.4.6 Safety measures in normal operation 14
2.4.7 Dangers due to electrical power 14
2.4.8 Particular danger zones 14
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 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 the assemblies 19
3.4.1 Switching the grinding machine on/ off 21
3.4.2 Control panel 21
3.4.3 Layout of the user interface (main screen) 22
3.4.4 Coolant Pump 24
3.4.5 Protective Hood 25
3.4.6 SP 112 Copy clamping plate 25
3.4.7 Grinding Unit 25
3.4.8 Polishing units with polishing paste 26
Table of Contents

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4. Transport 27
4.1 Transport Aids 27
4.2 Transport damage 27
4.3 Transport to another installation site 27
5. Installation 29
5.1 Selection of qualified personnel 29
5.2 Installation site 29
5.3 Supply connections 29
5.4 Settings 29
5.5 Initial commissioning of the grinding machine 30
6. Commissioning 31
7. Operation 33
7.1 General principles of grinding technology 33
7.2 Changing the profile 34
7.3 Grinding the cutter knives 35
7.3.1 Switching on the grinding machine 35
7.3.2 Mounting the copy clamping plate 35
7.3.3 Adjusting the grinding angle 37
7.3.4 Aligning the grinding unit 37
7.3.5 Aligning the left polishing unit 39
7.3.6 Aligning the right polishing unit 40
7.3.7 Starting the grinding process 40
7.4 Changing the copy clamping plate 41
7.5 Changing the wet grinding belt 43
7.6 Changing the right flap brush 44
7.7 Changing the left flap brushes 45
7.8 Changing the polishing pastes 46
8. Control system 47
8.1 Main Screen 47
8.2 Activating the product file 48
8.3 Renaming, creating and deleting the product file 49
8.3.1 Renaming product file 49
8.3.2 Creating the product file 50
8.3.3 Deleting the product file 50
Table of Contents

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8.4 Editing the parameters of the product file 51
8.4.1 Meaning of “Grinding” parameters 52
8.4.2 Meaning of “Feed Cycles” parameter 54
8.4.3 Meaning of “Polishing Process” parameters 56
8.5 Settings Data 58
8.6 Manual Functions 60
8.7 Language 61
8.8 Setting up an internet connection 62
9. Care and maintenance 63
9.1 Lubrication and Maintenance 63
9.1.1 Lubrication schedule and lubricant table 64
9.2 Cleaning 65
9.2.1 Cleaning of sub-structure 66
10. Malfunctions 67
10.1 Faults 67
11. Disassembly and disposal 68
11.1 Disassembly 68
11.2 Disposal 68
12. Service, spare parts and accessories 69
12.1 Postal Address 69
12.2 Service 69
12.3 Spare parts 69
12.4 Accessories 70
12.4.1 Abrasives used 70
13. Appendix 71
13.1 EC Declaration of Conformity 71
Table of Contents

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1.1 Foreword
These operating instructions are meant to make it easier to get to know the automatic grinding
and polishing machine, referred to in this document as grinding machine, and to use it properly
for the intended purpose.
The operating instructions contain important information on how to operate the grinding ma-
chine safely, properly and cost-effectively. Observance of these instructions helps to avoid dangers,
repair costs and downtimes, and increases 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
• Transport, installation, commissioning
• Operation, including troubleshooting in the process flow, as well as
• Servicing (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 used as a work
safety indication for all work which could result in death or physical injury.
Special care and caution must be taken when carrying out such jobs.
ATTENTION
The signal word “ATTENTION” is used to call attention to hazards which
could result in damage and/or destruction of the grinding machine or its
environment.
NOTICE The signal word “NOTE” calls attention to tips on use and useful
information.
1. Important notes
CAUTION

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1.3 Warning labels on the grinding machine and their meanings
The following warnings and safety alert signs have been affixed to the grinding machine:
CAUTION! DANGEROUS ELECTRICAL VOLTAGE
(warning notice on the switch cabinet)
On being connected to the voltage supply (3x 400 V), the grinding
machine becomes electrically live and touching its live parts directly
could be life-threatening.
Live machine parts may be opened only by authorized, trained
personnel.
The grinding machine must be separated from the mains supply
before carrying out servicing, maintenance and repair jobs on it.
CAUTION! RISK OF INJURY FROM KNIFE
(warning notice on the polishing unit)
Work on the grinding machine involves the sharpening of knives
which could cause serious cut injuries due to their sharpness.
Protective gloves must be worn when carrying out such work, in
particular when placing the knife.
Be careful when transporting blades. Use the protective devices
provided by the knife manufacturer. Wear protective gloves and
apron.
1. Important notes

TYPE B 500
Motor Schleifbandantrieb
Automatische Schleif- u. Poliermaschine
Bauj. 2016
Masch.-Nr. 820463500
V 400 A Gew. kg90025
KW 8,0 Hz 50 Sch. Y
V 400 n1 n21400/min
KW 2,2 A 2,5 Hz Sch50 Y
Motor Polierantrieb rechts
V 400 n1 n22870/min
KW 1,1 A 2,5 Hz Sch50 Y
Motor Polierantrieb links
V 400 n1 n21360/min
KW 0,7 A 2Hz Sch50 Y
Maschinenbau GmbH
Witschwender Strasse 26
88368 Bergatreute Germany
07527-928-0 www.knecht.eu
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1.4 Rating plate and machine serial number
The rating plate is located on the left side of the
machine.
The machine number is located on the rating plate
and on the top right of the machine.
1. Important notes
Figure 1-2 Machine serial number
Figure 1-1 Rating plate

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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, then a figure or item number is
added in brackets after the machine component.
Example: (7-5/1) denotes figure number 7-5, item 1.
Adjusting the grinding angle with the hand wheel
(7-5/1).
The grinding angle can be read off the scale
(7-5/2).
1. Important notes
Figure 7-5 Adjusting the grinding angle
1
2

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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 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 accident prevention rules and regulations applicable at the place of use of the
machine must also be observed.
2.1.2 Operator's duty
The operator is obliged to allow only those persons to work on the grinding machine, who
• are familiar with the basic occupational safety and accident prevention regulations and have
been trained and instructed in the handling of the grinding machine,
• have read the operating instructions, particularly the “Safety” section, and have read and un-
derstood the warning notes. They have given a signed confirmation of this in writing.
Checks are also carried out at regular intervals to ensure that the worker is fulfilling his employee
obligation to observe safety at work.
2.1.3 Obligations on the part of the personnel
All the personnel working on the grinding machine shall be obliged to
• observe the basic occupational safety and accident prevention regulations,
• read the operating instructions, particularly the “Safety” chapter, and the warning notes. They
must provide signed confirmation of this in writing.
2.1.4 Hazards associated with handling the machine
The grinding machine has been built to the latest technological standards and the acknowledged
rules of technical safety. In spite of that, its use presents 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 only be used:
• for the intended purpose, and
• in faultless condition with regard to safety-relevant aspects.
2. Safety

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2. Safety
Faults that could impair safety must be eliminated immediately.
2.1.5 Malfunctions
If safety-relevant malfunctions occur in the grinding machine, or if the processing behavior indi-
cates that such malfunctions may have occurred, the grinding machine must be stopped immedi-
ately until such time as the malfunction has been found and eliminated.
The malfunctions must be eliminated by authorized technical staff.
2.2 Use as intended
The grinding machine is only meant for the automatic grinding, deburring and polishing of flat
machine cutting knives.
Before starting work on a flat knife, it must be checked whether the knife fits on the knife holder.
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, e.g.,
• devices are not fastened properly.
• work pieces other than flat machine cutting knives are ground.
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 improperly attached or mal-
functioning safety and protective equipment,
• ignoring the operating instructions with regard to transportation, commissioning, operation,
maintenance and repair of the grinding machine,
• unauthorized structural alterations to the grinding machine,
• unauthorized modification, e.g. of the drive conditions (power and speed), and
• insufficient monitoring of machine parts that are exposed to wear

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• use of unapproved replacement and wear parts.
Use only original replacement and wear parts. If parts are purchased from external suppliers, it
cannot be guaranteed that they will be constructed and manufactured to withstand the stresses
and provide the required level of safety.
2.4 Safety regulations
2.4.1 Organizational measures
All the existent safety devices must be checked regularly.
Observe prescribed intervals for recurring maintenance work or as specified in the operating
instructions.
2.4.2 Protective devices
Before commissioning the grinding machine, it must be ensured that all protective equipment is
properly mounted and in functional condition.
Protective equipment may be removed only after the machine has stopped and has been secured
against accidental restarting of the grinding machine.
When spare parts are supplied, 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 the safety alert symbols and danger warnings on the grinding machine must be complete and
clearly legible.
2.4.4 Selection and qualifications of the 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. Safety
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 is 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 competent department/
person. 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 Dangers due to electrical power
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 electrician.
Cables marked in yellow are electrically live even when the main switch
is in off position.
CAUTION
2.4.8 Particular danger zones
When the grinding belt moves to working position, there is a hazard of pinching in the rear area
of the machine. Suitable personal protective equipment must be worn.

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2.4.9 Servicing (maintenance, repair) and fault rectification
Maintenance work is to be carried out on schedule by trained personnel. Inform operating per-
sonnel before starting repair work. The responsible supervisor is to be named.
For all service work, the grinding machine is to be disconnected from the power supply and se-
cured 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 alterations 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 prior written permission from KNECHT Maschinenbau
GmbH.
Immediately replace machine parts which are not in perfect condition.
Use only original replacement and wear parts. If parts are purchased from external suppliers, it
cannot be guaranteed that they will be constructed and manufactured to withstand the stresses
and provide the required level of safety.
2.4.11 Cleaning the grinding 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 a suspension device in accordance with the operat-
ing instructions (attachment points for load suspension devices, etc.). Only use suitable transport
vehicles with sufficient load-bearing capacity. Attach the load securely. Use suitable attachment
points. 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 B 500 automatic grinding and polishing machine grinds, deburs and polishes flat machine
cutting knives.
3.2 Technical specifications
Height ������������������������������������������������������������ approx. 1800 mm
Width ������������������������������������������������������������� approx. 1500 mm
Depth ������������������������������������������������������������� approx. 1500 mm
Weight ���������������������������������������������������������������������� 500 kg
Current supply* ������������������������������������������������������������ 3x 400 V
Mains frequency* �������������������������������������������������������������� 50 Hz
Output* ��������������������������������������������������������������������� 6.5 kW
Energy consumption* ��������������������������������������������������������� 10.5 A
Back-up fuse* ������������������������������������������������������������������ 16 A
Control voltage �������������������������������������������������������������� 24 V DC
Pneumatic connection ��������������������������������������������������������� 6.5 bar
Measured A-evaluated emission sound pressure level ����������������������������� 72 dB (A)
at workstation LpA**
Air consumption �������������������������������������������������������� max. 50 l/min
Wet grinding belt ������������������������������������������������������ 2200 x 60 mm
Flap brushes ���������������������������������������������������������� d.200 x 50 mm
*) This data may vary depending on the electrical power supply.
**) Dual number noise emission information according to EN ISO 4871. Noise emission value according to
EN ISO 11202 (measurement uncertainty KpA. 3 dB(A))
A K 24 cutter knife RR335 by KNECHT Maschinenbau GmbH was ground.

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Figure 3-1 Dimensions in mm
3. Description
3.3 Functional description
The grinding and polishing machine can be used to automatically sharpen, deburr and polish
linear and convex flat cutter knives in knife size of maximum 700 x 550 mm.
The knife is fastened onto a copy clamping plate and is moved along the wet grinding belt or the
flap brushes in movements that follow the shape of the knife.
Grinding angles between 5° and 35° can be steplessly adjusted on the grinding unit.
In case of emergency, the grinding and polishing machine can immediately be stopped by
pressing the “Emergency Stop” button.
GoCGoC
approx. 1500 mm approx. 1500 mm
approx. 1800 mm

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3. Description
3.4 Description of the assemblies
1 Belt protecting hood
2 Belt release lever
3 Hand wheel for height adjustment of “left polishing unit”
4 Rear doors of polishing units (concealed)
5 Control panel
6 Switch cabinet
7 Pneumatic cabinet
8 Hand wheel for height adjustment of “right polishing unit”
9 Protective hood
10 Water tray
11 Adjustable machine feet
Figure 3-2 General view of the grinding machine
3
2
5
6
7
4
1
9
8
11
10

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3. Description
1 Splash guard
2 Left polishing unit for knife blade
3 Knife
4 SP 112 copy clamping plate
5 Guard plate
6 Grinding unit
7 Work lamp
8 Right polishing unit for backside of knife
Figure 3-3 Interior view
2
1
3
4
8
7
6

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3. Description
1 Control knob for pressure regulation
2 Compressed air connection (6.5 bar)
3.4.1 Switching the grinding machine on / off
The main switch (3-5/1) is disposed on the rear of
the switch cabinet.
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.
3.4.2 Control panel
1 Display screen
2 “Control On” button: Activates the con-
trols (button starts flashing)
3 “Start/Stop” button: Starts/stops the
grinding program
4 “Change copy clamping plate” button
5 “Table forward” button: For moving the
table forward
6 “Setting Mode” key switch: Position “1”
for setting mode
7 “Wet grinding belt grinding pressure”
selector switch
8 “Coolant On/Off” button: Switches the
coolant pump on/off
9 “Table back” button: For moving the table
backward
10 “Emergency Stop” button
Figure 3-4 Pneumatic system
Figure 3-5 Main switch
Figure 3-6 Control panel
1
2
1
1
6
10
7
32 4 5
8 9