JEI MINIBEAST AUTO User manual

UNIT 21 EMPIRE BUSINESS PARK, ENTERPRISE WAY
BURNLEY, LANCASHIRE, UK, BB12 6LT
TEL: [phone] EMAIL: [e-mail]
OPERATOR’S MANUAL
PORTABLE MAGNETIC
DRILLING MACHINE
M
MI IN NI IB BE EA AS ST T A AU UT TO O

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Contents
1. GENERAL INFORMATION............................................................................................... 3
1.1. Application................................................................................................................. 3
1.2. Technical data............................................................................................................ 3
1.3. Design ....................................................................................................................... 4
1.4. Equipment included ................................................................................................... 5
2. SAFETY PRECAUTIONS.................................................................................................. 6
3. STARTUP AND OPERATION........................................................................................... 8
3.1. Mounting and operating the annular cutter................................................................. 8
3.2. Mounting and dismounting the cooling system bottle ................................................10
3.3. Control system of the electromagnetic base holding force ........................................11
3.4. Preparation...............................................................................................................12
3.5. Drilling.......................................................................................................................13
3.6. Replacing the motor brushes ....................................................................................14
4. WIRING DIAGRAM..........................................................................................................16
5. DECLARATION OF CONFORMITY.................................................................................17
6. QUALITY CERTIFICATE..................................................................................................18
7. WARRANTY CARD..........................................................................................................19

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1. GENERAL INFORMATION
1.1. Application
The MINIBEAST AUTO is a drilling machine with electromagnetic base designed to drill holes
with diameters of 12–36 mm (0.47–1.42’’) to the maximum depth of 51 mm (2’’) through the
use of annular cutters.
The electromagnetic base allows the drilling machine to be fixed to ferromagnetic surfaces
with a force that ensures user safety and proper machine operation. A safety strap protects
the machine from dropping in case of a power loss.
1.2. Technical data
Voltage
1~ 110–120 V, 50–60 Hz
1~ 220–240 V, 50–60 Hz
Total power
1000 W
Motor power
920 W
Cutter holder
19 mm Weldon (0.75’’)
Maximum drilling diameter
36 mm (1.42’’)
Maximum drilling depth
51 mm (2’’)
Electromagnetic base holding force
(surface with the thickness of 22 mm and roughness Ra= 1.25)
9 300 N
Electromagnetic base dimensions
80 mm × 160 mm × 36.5 mm
3.1’’ × 6.3’’ × 1.4’’
Slider stroke
70 mm (2.8’’)
Rotational speed under load
350 rpm
Rotational speed without load
580 rpm
Minimum workpiece thickness
6 mm (0.23’’)
Protection class
I
Noise level
over 85 dB
Vibration level
under 2.5 m/s2(≤ 8.2 ft/s2)
Required ambient temperature
0–40 °C (32–104 °F)
Weight
13.5 kg (30 lbs)

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1.3. Design
Figure 1. MINIBEAST AUTO design
316 mm (12.4’’)
313 mm (12.3’’)
221 mm (8.7’’)
arbor
spoke handle
carrying handle
control panel
electromagnetic base
chip guard
bottle valve lever
opening for safety strap
cooling system bottle

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Figure 2. Control panel design
1.4. Equipment included
The MINIBEAST AUTO is supplied in a metal box with complete standard equipment. The
included equipment consists of:
•Drilling machine
1 unit
•Metal box
1 unit
•Spoke handle
2 units
•Cooling system bottle
1 unit
•Chip guard
1 unit
•Safety strap
1 unit
•4 mm hex wrench
1 unit
•Operator’s Manual
1 unit
motor START button
electromagnetic base
ON/OFF switch
motor STOP button

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2. SAFETY PRECAUTIONS
1. Before beginning, read this Operator’s Manual and complete proper occupational safety
and health training.
2. The machine must be used only in applications specified in this Operator’s Manual.
3. The machine must be complete and all parts must be genuine and fully operational.
4. Theelectricalsupplyspecificationsmustconform tothose specifiedon therating plate.
5. The machine must be plugged into a properly grounded (earthed) socket-outlet. The
electrical supply must be protected with a 16 A fuse for 230 V or a 32 A fuse for 115 V.
When used on building sites, supply the machine through an isolation transformer made in
II protection class.
6. Never carry the machine by the cord or pull it to disconnect the plug from the power
outlet as this may damage the power cord and result in electric shock.
7. Transport and position the machine using the carrying handle, with the magnet switch set
to position ‘O’.
8. Untrained bystanders must not be present in the vicinity of the machine.
9. Before beginning, check the condition of the machine and electrical supply,
including the power cord, plug, control panel components, and cutters.
10. Keep the machine dry. Exposure to rain, snow, or frost is prohibited.
11. Never stay below the machine placed at heights.
12. Keep the work area well lit, clean, and free of obstacles.
13. Mount the annular cutter securely using the set screws. Remove adjusting keys and
wrenches from the work area before connecting the plug to the power outlet.
14. Never use dull or damaged cutters.
15. Mount and dismount cutters using protective gloves and with the power cord
unplugged from the power outlet.
16. Never use annular cutters without the pilot pin except for establishing incomplete
through holes.
17. Mount only annular cutters with the maximum drilling diameter of 36 mm (1.42’’) and
the maximum drilling depth of 55 mm (2.17’’).
18. Never use the machine in the vicinity of flammable fluids or gases, or in explosive
environments.

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19. Using the machine on surfaces that are rusty, covered with a thick paint layer, uneven,
or not stiff is prohibited.
20. Use the safety strap in all operating positions. The strap must be tight and fastened to a
securely fixed element either through the opening in the machine body or by catching
the strap on the carrying handle.
21. Before every use, inspect the machine to ensure it is not damaged. Check whether any
part is cracked or improperly fitted. Make sure to maintain proper conditions that may
affect the operation of the machine.
22. Always use eye and hearing protection and protective clothing during operation. Do not
wear loose clothing.
23. Proceed with caution when machining plates with thickness lower than 10 mm (0.4’’) as
the adhesion force depends on material thickness and is significantly lower for thin
plates.
24. The whole surface of the electromagnetic base bottom must be in full contact with the
workpiece. Before every positioning, wipe the workpiece with coarse-grained
sandpaper.
25. Do not touch moving parts or chips formed during milling. Prevent objects from being
caught in moving parts.
26. After every use, remove metal chips and coolant remainder from the machine. Do not
remove chips with bare hands.
27. Maintain the machine and tools with care. Cover steel parts with a thin grease layer to
protect them against rust when not in use for any extended period.
28. Perform maintenance only with the machine unplugged from the power outlet.
29. Perform repairs only in a service center appointed by the seller.
30. If the machine falls on a hard surface, from height, is wet, or has any other damage that
could affect the technical state of the machine, stop the operation and immediately
send the machine to the service center for inspection and repair.
31. Never leave the machine unattended during operation.
32. Remove from the worksite and store in a secure and dry location when not in use,
previously removing the cutter from the arbor.

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3. STARTUP AND OPERATION
3.1. Mounting and operating the annular cutter
Unplug the power cord from the power outlet and raise the motor by rotating the spoke
handles clockwise (1, Figure 3). Insert the proper pilot pin into the annular cutter (2), then
wear protective gloves and place the cutter into the arbor (3) in such a way to align the flats
4with the set screws 5. Finally, tighten both set screws with the supplied 4 mm hex wrench.
To dismount the cutter, proceed in reverse order.
Figure 3. Mounting the annular cutter
All safety precautions must be closely observed.
1
2
3
5
4

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Figure 4 shows how annular cutters operate. As the cutter penetrates the workpiece, the
pilot pin recesses into the arbor and tightens the spring. As a result, after the cutter goes
through the entire thickness, the slug core is expelled from the cutter.
Figure 4. Annular cutters operation
Annular cutters are designed to establish only through holes shown in Figure 5. Establishing
incomplete through holes requires not using the pilot pin.
Figure 5. Types of holes to establish with annular cutters
IMPORTANT INFORMATION
Only use your Minibeast AUTO to cut through single layers of material when using standard
annular cutters.
Do not attempt to cut through multiple layers/stacks/laminates of material with your (Insert
Model) magnetic drilling machine using standard annular cutter. Once the first plate has
been drilled, the centre slug will retain in the cutter. Attempting to continue the cutting
incomplete through holes
complete through holes
slug core
spring
pilot pin
annular cutter
arbor

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process will result in cutter breakage, or can cause the magnet to break away from the
surface, resulting in injury. (Note –always secure the machine to the workpiece with the
provided safety strap).
To achieve multiple layer cutting, please refer to JEI’s multi-Layer Cutter form, available for
all Turbo™ types. This will allow the solid slugs to be retained in the cutter during the cut and
be safely ejected once the hole cutting process is completed.
Do not attempt this operation whilst the machine is set in automatic mode. Only carry out
the multi-layer hole making process using the machine in manual setting.
Please refer to your JEI distributor for further details.
3.2. Mounting and dismounting the cooling system bottle
Hang the cooling system bottle on the screws (1, Figure 6) and attach the bottle hose to the
coupling (2). Dismount in reverse order.

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Figure 6. Mounting the cooling system bottle
3.3. Control system of the electromagnetic base holding force
The MINIBEAST AUTO drilling machine incorporates a holding force control system to
monitor the adhesion force of the electromagnetic base to the surface. The force value
depends on several factors, such as type, thickness, flatness, and roughness of the surface,
presence of paint, rust or other contaminants, supply voltage fluctuations, and the wear of
the electromagnetic base bottom. With the motor off, the base provides a fraction of the
maximum holding force. Once the motor is started, the holding force rises to the maximum.
If the holding force falls below a safe operating value, the control system will not allow the
machine to operate. Additionally, the system will prevent the startup of the motor if the
machine is placed on a surface thinner than 5 mm (0.2’’) as such thickness does not provide
sufficient holding force. In such case, the adhesion force will be only about 25% of the force
attained on a standard 22 mm (0.87’’) flat plate.
If the motor does not continue operation after the green MOTOR button is pushed and
released, it means that the control circuit is operating properly and preventing further
drilling because of too low adhesion force.
1
2

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3.4. Preparation
Before beginning, clean steel parts, especially the Weldon shank, from grease used to
preserve the machine for storage and transport.
Mount the annular cutter into the arbor in the manner described before.
Position the machine on a flat ferromagnetic surface (some types of stainless and acid-proof
steel do not conduct magnetic flux) with the thickness of at least 6 mm (0.23’’). The
workpiece must be clean, without rust or paint that decrease the holding force of the
electromagnetic base.
Then, connect the drilling machine to the power outlet and enable the holding force of the
electromagnetic base by toggling the MAGNET switch to position ‘I’.
Protect the machine using the safety strap to prevent possible injury if the machine loses
magnetic adhesion in case of a power loss. In order to do this, either mount the strap
through the opening in the machine body (Figure 7a, 7b) or catch the strap on the carrying
handle when working in horizontal position (Figure 7c). The strap must be tight, not twisted,
and must be replaced every single time the machine hangs on the strap as a result of coming
loose from steel.
Figure 7. Securing the drilling machine using the safety strap
When working in the position from Figure 7a, mount the cooling system bottle as described
before and fill it with acutting fluid. Do not use pure water as the cutting fluid, however,
a)
b)
c)

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using emulsions formed from mixing water and drilling oil is also satisfactory. To check the
operation of the cooling system, slightly loosen the bottle cap, open the valve using the
lever, and initially apply pressure on the pilot pin by rotating the spoke handles
counterclockwise. The fluid should fill the system and should begin flowing from the inside
of the cutter.
Enter into manual feed mode by positioning the spoke handles as shown in Figure 8a, and
rotate them counterclockwise to place the tip of the pilot pin above the drilling point.
Figure 8. Configuration of the spoke handles: manual feed (a), automatic feed (b)
3.5. Drilling
Start the motor by pressing the green MOTOR button. Slowly rotate the spoke handles
counterclockwise to bring the cutter close to the workpiece. Then, gently begin drilling and
enter into the automatic feed mode by setting the spoke handles in the position shown in
Figure 8b. The drilling machine will automatically detect the end of the drilling, which will stop
the feed after the hole is accomplished, however, the motor will still be rotating.
a)
b)
The cooling system works by means of gravitation, therefore use
a cooling paste when working in horizontal or inverted positions.

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Once the hole is accomplished, toggle the spoke handles into the manual feed mode
(Figure 8a). Then, retract the cutter from the workpiece and stop the motor using the red
MOTOR button. To move the machine to another drilling spot, first disable the
electromagnetic base by toggling the MAGNET switch to position ‘O’.
Once the work is finished, unplug the machine from the power outlet, clean chips and
coolant remainder from the machine and cutter, and remove the machine from the
worksite.
Tighten the cap of the cooling system bottle, close the valve, and press the pilot pin to expel
the coolant remaining within the system. Before inserting the drilling machine into the
toolbox, disassemble the cooling system bottle and remove the cutter from the arbor using
protective gloves.
3.6. Replacing the motor brushes
Check the condition of the carbon brushes every 100 operational hours. If the length of the
brushes is less than 5mm (0.2’’), replace them with new ones. To do this, unplug the power
cord from the power outlet, and unscrew four mounting screws (1, Figure 9) to remove the
motor cover (2). Then, unscrew the pressing plate 3,remove the brush holder (4)and the
brush (5). Proceed as described also for the second brush located at the opposite side of the
motor. To mount brushes, proceed in reverse order. After the replacement, run the motor
without load for 20 minutes.
When the cutter goes through the material, the slug core is
expelled from the tool with a significant force.

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Figure 9. Replacing the brushes
1
2
3
4
5

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4. WIRING DIAGRAM

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5. DECLARATION OF CONFORMITY
EC Declaration of Conformity
We
JEI DRILLING & CUTTING SOLUTIONS LTD
UNIT 21 EMPIRE BUSINESS
ENTERPRISE WAY
BURNLEY, LANCASHIRE, BB12 6LT
Declare with full responsibility that product:
MINIBEAST AUTO Drilling Machine with Electromagnetic Base
is manufactured in accordance with the following standards:
•EN 62841-1:2015
•EN 55014-1:2017
•EN ISO 12100:2010
and satisfies the regulations of the guidelines: 2014/30/EU, 2014/35/EU, 2006/42/EC,
2011/65/EU, 2012/19/EU.
Burnley, 1ST December 2017 ___________________________
David McFadden
Managing Director

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6. QUALITY CERTIFICATE
Machine control card
MINIBEAST AUTO Drilling Machine with Electromagnetic Base
Serial number...............................................................................................................................
Spindle radial runout....................................................................................................................
Slider to base travel perpendicularity..........................................................................................
Spindle axis to base perpendicularity ..........................................................................................
Base holding force........................................................................................................................
(surface with the minimum thickness of 22 mm and roughness Ra≤1.25)
Electric test
Type of test
Result
Name of tester
Test with sinusoidal voltage
(voltage 1000 V, frequency 50 Hz)
..................................
Date
Resistance of the protective circuit
.......... Ω
..................................
Signature
Quality control ................................................
Adjustments, inspections
Quality control .................................................

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7. WARRANTY CARD
WARRANTY CARD No.............
..................................................................... in the name of Manufacturer warrants the
MINIBEAST AUTO Drilling Machine with Electromagnetic Base to be free of defects in
material and workmanship under normal use for a period of 12 months from date of sale.
This warranty does not cover cutters, damage or wear that arise from misuse, accident,
tempering or any other causes not related to defects in workmanship or material.
Date of production .......................................................................................................................
Serial number...............................................................................................................................
Date of sale...................................................................................................................................
Signature of seller ........................................................................................................................
1.01 / 11 March 2014
WE RESERVE THE RIGHT TO MAKE CORRECTIONS AND MODIFICATIONS IN THIS MANUAL WITHOUT
PRIOR NOTICE