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WOLFF | A Brand of UFLOOR Systems
Operating instructions
Parquet sanding machine
Cobra 2.5 kW(3,2kW)/50 Hz
Item no. 052549 + 052551 + 054720 + 054891
Item no. 054004
WOLFF | A Brand of UFLOOR Systems | 71665 Vaihingen/Enz | Dieselstraße 19 | Tel. +49 (0)70 42 95 11- 0 | Fax +49 (0)70 42 95 11- 44 | E-mail info@ufloor-systems.com | Internet www.wolff-tools.de
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Table of Contents
Related Manuals for WOLFF 52549
Summary of Contents for WOLFF 52549
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Page 1: Operating Instructions
Item no. 052549 + 052551 + 054720 + 054891 Item no. 054004 WOLFF | A Brand of UFLOOR Systems | 71665 Vaihingen/Enz | Dieselstraße 19 | Tel. +49 (0)70 42 95 11- 0 | Fax +49 (0)70 42 95 11- 44 | E-mail info@ufloor-systems.com | Internet www.wolff-tools.de... - Page 2 © 2009 All rights reserved. Reproduction in whole or in parts requires written permission from Hermann FRANK GmbH & Co. KG, 75038 Oberderdingen, Germany. No liability for any damage arising from the use of this brochure. Subject to alterations. Hermann FRANK GmbH & Co. KG Östliche Bahnhofstr.
- Page 3 This brochure uses the following symbol to mark important instructions for safety and preventing damage: Please give special attention to the marked instructions. They refer to a potentially dangerous situation. Failure to comply can result in fatal or severe injuries and damage to property. 03/2009...
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Page 4: Table Of Contents
Contents Introduction ............... .5 Scope of delivery . -
Page 5: Introduction
Introduction Dear customer: Congratulations on purchasing the FRANK parquet sanding machine Cobra, the correct choice with respect to quality and performance. The Cobra is the result of a consistent implementation of many years of experience. This machine combines extraordinary high sanding performance and excellent sanding quality with easy to operate, proven and reliable technology. -
Page 6: Scope Of Delivery
Scope of delivery Machine PUR cable with plug and coupling Dust mask Operating instructions Allen keys 5 mm, 6 mm, 10 mm Running wheel adjustment gauge Tool bag Fixed spanners 10 mm, 13 mm, 17 mm, 30/36 mm Hearing protection Not shown: 2 dust bags Not shown: Abrasive belts (10 pcs. -
Page 7: Description Of The Parquet Sanding Machine Cobra
Description of the parquet sanding machine Cobra Important components 1 Sanding pressure regulator 9 Belt cover 2 Castors 10 Motor 3 Running wheels 11 Cockpit 4 Roller cover 12 Cable arm 5 Star-shaped knob 13 Rear carrying bar 6 Motor plug 14 Main lifting lever 7 Front carrying bar 15 Soft lowering lever... -
Page 8: Technical Data
Technical data Single-phase AC motor ....230 V (240 V), 50 Hz Motor capacity ....... 2.5 kW (3,2 kW) Roller speed . -
Page 9: Starting The Machine
Starting the machine Mounting the handle Note! The Cobra is delivered with handle and dust pipe dismantled. Caution! There is the risk of injury or damage caused by an unintentional starting of the machine. Disconnect the machine from the mains supply before working on the machine! How to mount the handle: 1. -
Page 10: Mounting The Dust Pipe
5.1.1 Adjusting the handle height 1. Lower the main lifting lever ( 1 ) to the front. 2. Slide the clamp sleeve ( 2 ) to the top and take apart the connecting rod ( 3 ). 3. Loosen the clamp bolt ( 4 ). 4. -
Page 11: Mounting The Motor
Mounting the motor The machine is delivered with the motor already mounted. Due to reasons of weight, it may however be necessary to remove the motor to transport the machine (see chapter 6.2, Removing the motor, on page 17). Before placing the motor onto the machine, make sure the catch ( 1 ) is in the open position. When the motor is placed correctly, lock the catch ( 1 ) to fix the motor. -
Page 12: Mounting The Belt
Installing the belt 1. Swing out the lever ( 4 ) and lift the belt tensioner ( 2 ) until the locking stud ( 3 ) unlatches. 2. Insert the belt ( 1 ) around the belt pulleys and deflection roller as shown in the figure. 3. -
Page 13: Mounting The Dust Bag
Mounting the dust bag Caution! Only use original FRANK dust bags for the parquet floor sanding machine Cobra. Caution! Make sure the dust bag is fitted securely to the dust pipe before sanding. How to install the dust bag: 1. Pull the outer bag over the dust pipe behind the pipe reinforcement ( 1 ). Lace up the cords carefully. -
Page 14: Adjusting The Wall Bumper Wheels
Adjusting the wall bumper wheels 1. Loosen the bolts ( 1 ) to slacken the mounts. 2. The wheels can be screwed in or out by rotating them to adjust them to the proper wall distance. The wheels must be positioned horizontally to the floor. 3. -
Page 15: Connecting The Cobra To The Mains Supply
Connecting the Cobra to the mains supply How to connect the machine to the mains supply: 1. Make sure that the switch ( 1 ) is in the off position. The machine must be switched off before connecting it to the mains supply. 2. -
Page 16: Disassembling For Transportation
Disassembling for transportation For easier transportation, the handle, the dust pipe, and the motor can be removed. Removing the handle There is the risk of injury or damage caused by an unintentional starting of the machine. Disconnect the machine from the mains supply before working on the machine! How to remove the handle: 1. -
Page 17: Removing The Motor
Removing the motor There is the risk of injury or damage caused by an unintentional starting of the machine. Disconnect the machine from the mains supply before working on the machine! How to remove the motor: 1. Make sure that the motor switch is in the off position and that the power cable is disconnected from the motor plug. -
Page 18: Transporting The Machine
Transporting the machine To carry the machine, use the two carrying bars at the front ( 1 ) and back ( 2 ). The front carrying bar ( 1 ) can be folded up. The transport plate is recommended for transporting the machine. When the machine is placed on the transport plate, the sanding roller and the castors are unloaded. -
Page 19: Operating The Cobra
Operating the Cobra Proper clothing and equipment Caution! Wear hearing protectors! Wear hearing protection when operating the parquet sanding machine Cobra. Wear the ear muffs supplied as accessory with the machine. The following sound level values were measured for the parquet sanding machine Cobra according to DIN 45645: Idle mode LEQ = 84 dB (A) -
Page 20: Safety Instructions Regarding Dust
Safety instructions regarding dust Caution! Ultra-fine sanding dust! Wear a dust mask when sanding woodfloor or floorboard flooring. A dust mask is supplied as accessory with the machine. When the machine is used for its proper purpose, the sanding of wooden floors naturally produces dust. -
Page 21: Disposal Of Sanding Dust
Disposal of sanding dust Caution! Risk of fire! Because of the fire risk, the sanding dust contained in the dust bag must always be disposed of immediately every time the machine stops or when sanding is completed. The sanding dust must be disposed of in a fireproof, non-flammable container. The container must be covered with a fireproof, non-flammable lid. -
Page 22: Replacing The Abrasive Belt
Replacing the abrasive belt Caution! Risk of injury if the machine starts unintentionally! When replacing the abrasive belt, there is a risk of starting the machine unintentionally. Unplug the machine from the mains supply before working on the abrasive belt. Caution! Risk of cutting your hands! The sanding grains of the abrasive belt have sharp edges. -
Page 23: Adjusting The Sanding Pressure
Adjusting the sanding pressure Use the sanding pressure regulator ( 1 ) to adjust the required sanding pressure. 1. Fold the main lifting lever ( 2 ) to the top. 2. Pull the sanding pressure regulator ( 1 ) to the top and rotate it to the desired position ( 3 ). 3. -
Page 24: Safety Instructions For Electric Cable And Connectors
Safety instructions for electric cable and connectors Caution! Danger of death from electric shock! Danger of death from electric shock if the electric cable or connectors are damaged. Damaged cables or connectors have to be replaced by a qualified electrician. Caution! Danger of death from electric shock! Danger of death from electric shock when running over the electric cable with the sanding machine! -
Page 25: Remarks About Sanding Woodfloor And Floorboard Floors
Remarks about sanding woodfloor and floorboard floors Caution! Check the floor for loose boards. They must be fastened before sanding. Caution! Risk of fire! If the floor is installed with nails, make sure that they are countersunk deep enough to avoid a grinding of the nails before you start sanding. Hitting a nail while sanding may produce sparks and cause a fire. - Page 26 Each sanding lane corresponds to one forward and one backward sanding without offsetting the backward sanding lane. 03/2009...
- Page 27 Due to the space needed for the machine operator and the machine itself, the area of approximately 1.5 m to the wall behind the sander will not be sanded. Turn the machine 180° and sand the remaining area of the floor. Again sand in overlapping lanes from left to right.
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Page 28: Switching On/Off The Cobra With The Cockpit Control Panel
Switching on/off the Cobra with the cockpit control panel 1. Before starting the machine, make sure that the main lifting lever for the sanding roller ( 1 ) is in the rear position. The sanding roller is clearly raised from the floor. The distance to the floor is about 15 mm. -
Page 29: Sanding With The Cobra
Sanding with the Cobra 1. Before starting the machine, make sure that the main lifting lever for the sanding roller ( 1 ) is in the rear position. The sanding roller is clearly raised from the floor. The distance to the floor is approx. 15 mm. 2. - Page 30 3. Before you lower the sanding roller to approx. 5 mm above the floor, pull the soft lowering lever ( 2 ) with your right hand and keep it in this position. 4. While holding the soft lowering lever ( 2 ), push the main lifting lever ( 1 ) forward with your left hand.
- Page 31 5. To start sanding the first lane, constantly push forward the machine and slowly lower the soft lowering lever ( 2 ) to lower the sanding roller onto the floor. Caution! Move the machine at an even pace while sanding to avoid dents sanded into the floor. 03/2009...
- Page 32 6. Before stopping the machine at the end of the forward movement, pull the soft lowering lever ( 2 ) to lift the sanding roller from the floor. 7. Every forward sanding is followed by a backward sanding in the same lane. For the next forward sanding, offset the machine about 10 cm to the right.
- Page 33 8. How to finish or interrupt a sanding round: To finish or interrupt a sanding round, pull the soft lowering lever ( 2 ) with your right hand and keep it in this position until you moved the main lifting lever ( 1 ) into the rear position with your left hand.
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Page 34: Maintenance
Maintenance Replacing the sanding roller If the surface of the sanding roller is damaged or worn, the roller must be replaced. How to replace the sanding roller: 1. Switch off the machine. 2. Unplug the power cable from the mains supply. 3. - Page 35 7. Lay the machine on its left side. 8. Use a pry bar to gently raise the sanding roller. 9. Take out the sanding roller. 10. Be careful not to loose the parallel key. 11. Slide a new sanding roller onto the sanding roller shaft. The parallel key must properly fit into the slot in the sanding roller shaft.
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Page 36: Adjusting The Running Wheels
Adjusting the running wheels If the machine produces a slanted sanding, the planar setting has to be adjusted. After replacing the sanding roller or the running wheels, the planar setting always has to be readjusted. For an exact planar sanding, the sanding roller and the running wheels must be flush. -
Page 37: Adjusting The Castors
6. Use the running wheel adjustment gauge to adjust the right running wheel ( 3 ) to the position of the left running wheel ( 1 ). Turn the star-shaped knob of the right running wheel ( 3 ) until the right running wheel ( 3 ) slightly touches the bar of the running wheel adjustment gauge ( 4 ). -
Page 38: Adjusting The Tension Roller
Adjusting the tension roller The tension roller automatically controls the abrasive belt to ensure that the belt runs centrically on the sanding roller. If the automatic centering control deteriorates in the course of operation, the tension roller has to be readjusted. Caution! Danger of injury! The abrasive belt shall only be adjusted by qualified personnel since the adjustment has to be performed on the running machine with opened sanding roller cover... -
Page 39: Replacing The Lamp
Replacing the lamp 1. Remove the socket from the lamp ( 3 ) by twisting it a quarter turn to the left. 2. Unscrew the knurled bolt ( 2 ) until you can fold up the clamping bracket ( 1 ). 3. -
Page 40: Warranty
Warranty The warranty period for new FRANK machines is one year from delivery to customer, unless valid legal regulations call for a different warranty period. When asserting warranty claims, the invoice and/or proof of purchase shall be submitted. All repairs covered by warranty shall be carried out by a FRANK authorised service shop. Repairs carried out by the customer and/or in an improper manner will void any warranty claims.