Blastrac BGS-250 User manual

Grinding & Polishing
MODEL BGS-250 GRINDER
SECTION 2 SAFETY INSTRUCTIONS
1
OPERATING MANUAL
SEPTEMBER 2008
Grinding & Polishing
MODEL
BGS-250 Grinde
r
Technical Data 1
Safety Instructions 2
General 3
Transport 4
Initial Operation 5
Operation 6
Maintenance 7
Electrical Systems 8
Fault Diagnosis 9
Spare Parts 10

Grinding & Polishing
MODEL BGS-250 GRINDER
SECTION 1 TECHNICAL DATA
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1.1 Rating
1.2 Unit specifications
1.3 Operative range and correct usage
1.4 Stand-by power supply
1.5 Machine type designation
CONTENTS – SECTION 1

MODEL BGS-250 GRINDER
SECTION 1 TECHNICAL DATA
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Unit / Designation: Blastrac Grinding Machine
Machine Type: BGS-250
Manufacturer:
Technical Data:
Grinding machine BGS-250
Tool diameter 250 mm ø (~10 in.)
Working width 250 mm (~10 in)
Dust hose connection 50 mm ø (~2 in)
Recommended Dust Collector Contact Blastrac for a suitable dust
collector
230V Machines:
Power consumption 2,2 kW
Connected loads 230V, 50 Hz for CEE-plug
Fuse protection 16A
Cable Connected loads CEE plug and Coupling 16Amp
Up max 50M in 2,5mm2
Blastrac BV Blastrac US
Utrechthaven 12 13201 North Santa Fe
3433 PN Nieuwegein Oklahoma City, OK 73114
THE NETHERLANDS United States of America
T +31(0)30 – 601 88 66 Local: 405/478-3440
F +31(0)30 – 601 83 33 toll-free: 800/256-3440
[email protected] [e-mail]
www.blastrac.com
1.1 RATING
1.2 UNIT SPECIFICATIONS

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115V Machines:
Rated HP Output 1.75 HP
Connected loads 115V single phase, 15 FLA
R.P.M. 1725
Dimensions:
BGS-250
Length 46.4 in / 1180 mm
Width 20.5 in / 520 mm
Height 45.3 in / 1150 mm
Weight 154 lbs / 70 kg
1.3 OPERATIVE RANGE AND CORRECT USAGE
The BGS-250 is exclusively designed to process horizontal
surfaces. The machine must not be used for other purposes. The
manufacturer will not be liable for damage resulting from
incorrect usage. In these cases, the user takes responsibility for
all risks.

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1.4 STAND-BY SUPPLY (GENERATOR)
If the BGS-250 is to be operated using power from a generator,
the generator must be operated in accordance with the current
U. S. National Electric Code guidelines or European VDE
standards, as appropriate (this applies, but is not limited to, the
protective earth conductor in particular) in order to ensure that all
safety devices are functioning and to eliminate possible damage
to electrical components.
1.5 MACHINE TYPE DESIGNATION
BGS–250
Product Type
Working width in mm

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2.1 Warnings and symbols
2.2 Organizational measures
2.3 Personnel selection and qualification
2.4 Safety precautions applicable to different operating conditions
2.5 Special work within the scope of use of the equipment and
maintenance activities, as well as repairs during operation
2.6 Definition of the safety off position
2.7 General safety considerations
2.8 Electrical engineering regulations
CONTENTS – SECTION 2

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The following denominations and symbols are used in the Operating Instructions
to highlight areas of particular importance:
2.1 WARNINGS AND SYMBOLS
Symbol of operational safety.
In these Operating Instructions this symbol will be
shown next to all safety precautions that are to be
followed to maximize safety and equipment
performance. Follow these instructions and take
special care in these circumstances. In addition to
these instructions, the general safety precautions and
accident prevention guidelines are also to be followed.
Particular details regarding the economical use of the
equipment
Information, instructions and restrictions with regard to
possible risks to persons or to extensive material
damages
Warning of dangerous voltages
Indicates protective devices in electrical appliances

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In addition to these Operating Instructions, general and legal regulations
regarding accident prevention and environmental protection must be complied
with per local regulations.
Such duties may, for example, relate to the handling of hazardous substances, or
the provision and wearing of personal protection equipment, as well as
compliance with traffic regulations.
The Operating Instructions must be supplemented by other instructions, including
the duty to supervise and report incidents relating to particular working practices,
for example work organization, work procedures and personnel safety.
Personnel entrusted with working with the machine must read and understand
the Operating Instructions before starting work, paying specific attention to the
Safety information. To read these instructions after work has commenced is too
late. This particularly applies to incidental activities such as setting up the
equipment, carrying out maintenance work or training staff to work with the
machine.
Indicates where consultation with the manufacturer is
required.
Instructions relating to periodic checks.
2.2 ORGANIZATIONAL MEASURES
These Operating Instructions are to be kept with the machine, and
must be within reach at all times!
Reference to important instructions contained in the
Operating Instructions.

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From time to time the working practices of the operators are to be checked by a
supervisor, especially regarding awareness of safety and hazards.
Operators must tie back long hair, and not wear loose clothing or jewelry
including rings. There is a risk of injury by items getting caught, or being drawn
into moving machinery.
:
All safety and hazard notices at or on the machine must be kept complete and
legible.
If safety-critical changes occur to the machine or its working method, the
machine must be shut down immediately. The cause of the fault must be
established and remedied.
This applies in particular to the fitting and adjustment of safety devices.
Spare parts must comply with the technical requirements specified by the
manufacturer. This is always guaranteed if original spare parts are used.
Intervals for recurring checks and inspections specified in these Operating
Instructions must be complied with.
To perform maintenance work correctly, it is imperative to be equipped with the
proper tools for the task.
The location and the operation of fire extinguishers must be made known on
each work site.
Take note of the facilities for reporting and fighting fires.
Use personnel protection equipment if necessary or required by
local regulations! Take notice of all safety and hazard notices on
the machine!
Changes, additions or conversions to the machine must not be
made without the manufacturer’s permission!

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Fundamental duties:
Work on the machine may only be undertaken by trained personnel.
Only trained personnel may be employed. Note the statutory minimum age.
Clearly specify the responsibilities of personnel for operation, setting up,
servicing and maintenance work.
Make sure that only authorized personnel operate or work on the machine.
Define responsibilities of the machine operator, with regard to traffic safety
regulations, and inform him not to take instructions from third parties who may
not be complying with the local safety requirements.
Personnel, who are being trained to operate equipment, may only use the
machine under constant supervision of an experienced person.
.
Do not allow any method of working that impairs safety!
Recognized official procedures have to be used to ensure the machine is
operated in the safest and best conditions.
Check the machine visually for any damage and defects at least once a day!
2.3 PERSONNEL SELECTION AND QUALIFICATION
Work on electrical equipment may only be performed by a skilled
electrician or by trained persons under the supervision of a skilled
electrician, as well as in accordance with the local electrical
engineering regulations.
2.4 SAFETY PRECAUTIONS APPLICABLE TO SOME
OPERATING SEQUENCES
Only operate the machine when all safety devices, and related
safety equipment, are present and operational!

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In the event of operational malfunctions the machine must be shut down
immediately and secured.
Faults must be immediately remedied.
Carry out the switch on, and switch off, operations in accordance with the
operations manual.
Before turning on the machine verify that no one can be endangered when the
machine starts up.
Do not turn off the dust collector while the machine is running.
Secure the work area around the machine in public areas
providing a safety distance of at least 6.5 feet (2 meters) from the
machine.
All persons in the proximity of the machine must wear ear
protectors and safety shoes. In addition, the machine operator
must wear close fitting protective clothing.
Use only extension cables, used for extending the main cable, that
are sized and marked in accordance with the overall power
consumption of the machine and valid U. S. National Electric Code
guidelines or European VDE standards, as appropriate.

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Mechanical servicing work:
Put the machine in the Safety off position as described in Section 2.6 before
carrying out any service work on the machine.
Follow any special safety instructions in sections on servicing the machine. See
Sections 7.1 – 7.9.
Service and maintenance intervals specified in these Operating Instructions, as
well as information on the replacement of parts must be undertaken and/or
complied with.
These activities may only be undertaken by qualified personnel.
The operator must be given information about maintenance and work procedures
before starting the cleaning process. This includes, but is not limited to the
following:
•Procedures that are related to normal operation
•Methods of tools adjustment on the machine, and its safety devices
•All “ON and OFF” functions that have to be carried out according to the
operation manual
•Methods for maintenance and repair.
If the equipment is switched off in order to carry out maintenance, repair, or
adjustment, it must be secured against unintended restart.
Switch OFF and disconnect the machine from the power supply.
See Section 2.6 Safety off position for specific details.
Always dispose of the contents of the dust bin or of a connected dust collector
before loading the machine onto a vehicle.
2.5 SPECIAL WORK WITHIN THE SCOPE OF USE OF THE
EQUIPMENT AND MAINTENANCE ACTIVITIES AS WELL
AS REPAIRS DURING OPERATION

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Observe the local waste disposal regulations; in uncertain situations ask the next
higher authority.
Do not use any aggressive cleaning materials.
Only use lint-free cleaning cloths.
Always verify that any bolted connections that were loosened during service and
maintenance work are properly secure and tight.
If safety devices need to be removed or dismantled during service and repair,
these safety devices must be reinstalled, and inspected immediately after
completion of the servicing and repair work.
Make sure that process materials and replaced parts are disposed of safely and
in an environmentally friendly manner.
Make sure that electrical components used for replacement purposes comply
with the original parts and are correctly adjusted if necessary.
Definition: The machine is in a safe condition where it cannot be a hazard.
Putting the equipment in the Safety off position involves:
•Switching off the machine.
•Switching off the dust collector (if being used).
•Waiting for all drives to stop.
•Pulling out mains plug.
•Securing against unintended restart.
2.6 DEFINITION OF THE SAFETY OFF POSITION
Work on electrical equipment may only be performed by a skilled
electrician or by trained persons under the supervision of a skilled
electrician, as well as in accordance with the local electrical
engineering regulations.

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The electrical components of the equipment must be inspected regularly. Defects
such as loose connections or scorched cables must be replaced immediately.
Call a skilled electrician or our Customer Service.
A second person must be in attendance while the electrician is working on the
equipment.
The work area must be secured against any third party entering the work area,
by means of a red and white safety chain and a danger sign. Use only tools that
are insulated against electricity.
Only start work after you are familiar with the electrical engineering regulations
that apply to the local area.
Only use multi-meters that comply with the regulations when troubleshooting.
From time to time check multi-meters to ensure that they are operating correctly.
2.7 GENERAL SAFETY CO NSIDERATIONS
Any machine, if it is not used according to regulations, may be
hazardous during operation, set-up and servicing. The machine
owner is responsible for compliance with the safety regulations
during operation and maintenance, and for the use of safety
devices supplied with the machine, as well as the provision of
appropriate additional safety devices!
2.8 ELECTRICAL ENGINEERING REGULATIONS
Work on electrical equipment may only be undertaken by a skilled
electrician or by trained persons under the guidance and
supervision of a skilled electrician, as well as in accordance with
the local electrical engineering regulations.
Use only extension cables, used for extending the main cable, that
are sized and marked in accordance with the overall power
consumption of the machine and the U. S. National Electric Code
guidelines or European VDE standards, as appropriate.

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3.1 Range of application
3.2 Scope of supply
3.3 Description of the machine
3.4 Operating elements
3.5 Electric components
3.6 The tools
3.7 Care and maintenance
CONTENTS – SECTION 3

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Typical ranges of applications for the BGS-250 are for example:
•To remove undulated concrete and asphalt surfaces
•To prepare the surface for coatings
•To remove coating defects
•To remove residual mineral adhesives
Scope of supply of the machine:
9Grinding machine (BGS-250)
9Dust hose (Optional)
9Operating manual (1x)
Using one of the dust collectors specified for your machine ensures nearly dust
free operation and also improves the life of the machine and tools. Today, clean
air is important in the workspace. Blastrac uses specially designed dust collection
systems with a high separation and thus guarantee a high cleaning level.
Blastrac advises using a recommended Blastrac dust collector. This ensures an
appropriate airflow and adequate heat removal.
To connect the dust collector to the machine, you need a connecting hose with a
50 mm (~ 2 in) inside diameter.
3.1 RANGE OF APPLIC
A
TION
3.2 SCOPE OF SUPPLY

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Figure 3.3.1a
110V 50 Hz / 230V 50 Hz / 400V 50Hz Machines:
1 Height adjusting handle 6 Lifting handle
2 Hand grip 7 Coupling
3 ON/OFF Emergency switch 8 Flexible coupling
4 Suction connection piece 9 Adapter
5 Driving motor 10 Cutter plate/diamond plate
3.3 DESCRIPTION OF THE MACHINE

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Fi
g
ure 3.3.2b
115V 60 Hz Machine:
The Blastrac Grinding machine BGS-250 can reach an output of 2500 mm and
distinguish itself with its high economic efficiency and easy handling.
The machine levels when on uneven and undulated floors and therefore is also
suitable for optimization of surfaces before blasting. Alternatively, the machine
can be used to smooth floor surfaces as a preparation for economical coatings to
be applied.
1 Height adjusting handle 7 Tool Adapter
2 Hand grip 8 Flexible coupling
3 ON/OFF Emergency switch 9 Adapter Disc
4 Suction connection piece 10 Cutter plate/diamond plate
(Not shown)
5 Driving motor 11 Gear Reducer (115V only)
6 Lifting handle
5
1
3
2
4
7
6
8
9
10
11

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Figure 3.4.1
Depending on the application,the disc adapter can be fitted with several different
types of diamond-grinding discs. The number of revolutions the tool runs at is
1400 rev/min (U/min). A special coupling distributes the load which is effective on
the tool, and ensures a long working life of the machine.
Hand wheel and mini leveler
Before switching on the BGS-250, check that the cutter or diamond plate is in a
horizontal position with the mini leveler (4). The adjusting can be done by turning
the hand wheel (2) in the right or left direction.
3.4 OPERATING ELEMENTS

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The control box (3) is equipped with all control elements and instruments to
monitor the grinding machine.
ON Switch
Pressing the "ON" push button switches on the driving motor. This occurs only
when the power supply works properly. See to it that the machine is lifted when
you switch it on.
Emergency Stop Switch
The emergency stop switch is the red button located on the control box. Pressing
this switch immediately stops the power supply to all units of the machine. This
red button is also used as OFF switch.
110V 50 Hz / 230V 50 Hz / 400V 50Hz Models
1 Motor Adapter 3 Adapter Disk
2 Flex Coupling 4 Tool (cutter plate shown)
3.5 ELECTRIC COMPONENTS
3.6 THE TOOLS
Fi
g
ure 3.6.1a