ENGiNDOT 900W 7.2A Electric Wall Sander Kit User Manual

ENGiNDOT 900W 7.2A Electric Wall Sander Kit

Safety instruction

Safety warning for electric tools
Warning: Read all warnings and all instructions. Failure to comply with the following warnings and instructions can result in electric shock, fire and/ or serious injury. Keep all warnings and instructions for reference.

• Safety of workplace

1. Keep the workplace clean and bright. Chaos and darkness can cause accidents.
2. Do not operate electric tools in explosive environment, such as flammable liquid, gas or dust. Sparks generated by electric tools can ignite dust or gas.
3.  Operate power tools after children and bystanders leave. Inattention can cause the operator to lose control of the tool.

• Electrical safety

1. The power tool plug must match the socket. Never modify the plug in any way. Do not use any change-over plug for electric tools to be grounded. Unmodified plugs and matching sockets will reduce the risk of electric shock.
2. Avoid human contact with grounded surfaces such as pipes, fins and refrigerators. If you are grounded, it increases the risk of electric shock.
3. Do not expose power tools to rain or humidity. Water entering power tools increases the risk of electric shock.
4. Do not abuse wires. Never use wires to carry, pull power tools or pull out plugs. Keep wires away from heat, oil, sharp edges or moving parts. Damaged or twisted cords increase the risk of electric shock.
5. When using electric tools outdoors, use grounding cord suitable for outdoor use. Flexible cords suitable for outdoor use will reduce the risk of electric shock.
6. If it is unavoidable to operate electric tools in humid environment, residual current operated protec­tor (RCD) should be used.

• Personal safety

1. Keep alert, pay attention to the operation and keep awake when operating the power tools. Do not operate power tools when you are tired or have a drug, alcohol or treatment response. Instanta­neous negligence in the operation of power tools can cause serious personal injury.
2.  Use personal protective equipment. Always wear goggles. Safety devices, such as dust mask, anti-skid safety shoes, safety helmet, hearing protection and other devices under appropriate conditions, can reduce personal injury.
3. Prevent accidental start-up. Make sure that the switch is in the off position when connecting the power supply and / or battery box, picking up or handling tools. It may be dangerous to put your finger on the switch that has been turned on or insert the plug when the switch is turned on.
4. Remove all adjustment keys or spanners before turning on the power tool. The wrench or key left on the rotating parts of power tools can cause personal injury.
5. Don’t stretch your hands too long. Always pay attention to foothold and balance. In this way, the electric tools can be well controlled in case of accidents.
6. Dress appropriately. Don’t wear loose clothes or accessories. Keep clothes, gloves and hair away from moving parts. Loose clothing, accessories or Jong hair can get involved in moving parts.
7. If the devices connected with the chip removal and dust collection equipment are provided, ensure that they are well connected and properly used. The use of these devices can reduce the risk of dust.

• Electric tools use and precautions

1. Don’t abuse power tools, use appropriate power tools according to the purpose. Choosing properly designed electric tools will make your work more effective and safe.
2. If the switch cannot tum on or off the power supply of the tool, the power tool cannot be used. Electric tools that cannot be controlled by switches are dangerous and must be repaired.
3. Before any adjustment, replacement of accessories or storage of power tools, the plug and / or battery box must be removed from the power supply. This protective measure will reduce the risk of accidental starting of tools.
4. Store unused power tools out of the reach of children, and do not let people unfamiliar with power tools or those who do not understand these instructions operate power tools. Power tools are dangerous in the hands of untrained users.
5. Maintain electric tools. Check whether the moving parts are adjusted in place or stuck, check the damage of parts and other conditions that affect the operation of electric tools. If there is any damage, the electric tools should be repaired before use. Many accidents are caused by poorly maintained power tools.
6. Keep cutting tools sharp and clean. Well maintained props with sharp cutting edge are not easy to jam and easy to control.
7. Use electric tools, accessories, tool heads, etc. according to the instruction manual, considering the operation conditions and operations. Using power tools for operations that are not compatible with their purpose may cause hazards.

• Maintain
  Send your power tools to professional maintenance personnel and use the same accessories for repair. This will ensure the safety of the electric tools being repaired.

Instructions for all operations

General safety warning for sanding operation

•  The electric tool is used to realize the tool function of sanding machine. Read all safety warnings, instructions, diagrams and regulations provided with the power tool. Failure to follow all the tips listed below may result in electric shock, fire and / or serious injury.
•  It is not recommended to use this tool for sanding, brushing, polishing or cutting. If electric tools are not operated according to the specified functions, it may cause danger and personal injury.
• Do not use accessories not recommended by the tool manufacturer and specially designed. Otherwise, the accessory may be installed on your power tool, and it cannot guarantee safe opera­tion.
• The rated speed of accessories must be at least equal to the maximum speed marked on the power tool. When the accessory runs at a speed higher than its rated speed, it will burst and splash.
•  The outer diameter and thickness of accessories must be within the rated capacity of power tools. Incorrect accessory size cannot be adequately protected or controlled.
• The shaft hole size of grinding wheel, flange, back cushion or any other accessories must be suitable for installation on the spindle of power tool. Accessories with shaft holes that are not matched with power tool mounting parts will lose stability, excessive vibration and cause out of control.
• Do not use lost accessories. Before each use, check accessories such as grinding wheel for debris and cracks, back cushion for cracks, tears or excessive wear, wire brush for looseness or wire breakage. If the power tool or accessory falls, check for damage or install undamaged accessory. After checking and installing the accessories, keep yourself and the bystanders away from the plane of the rotating accessories, and run at the maximum no-load speed of the power tool for 1min. Damaged accessories usually break during this test.
• Wear protective equipment. Use face masks, safety goggles or safety goggles as appropriate. When applicable, wear dust mask, hearing protector, gloves and work apron which can block small abrasive or work pieces. The eye guard must block the flying debris generated by various opera­tions. Dust masks or masks must be able to filter particles produced by operation. Long term exposure to high-intensity noise can cause deafness.
•  Keep bystanders at a safe distance from the work area. Anyone entering the work area must wear protective equipment. Debris from work pieces or damaged accessories may fly out and cause injury to bystanders close to the operating area. When cutting accessories touch a live wire, the exposed metal parts of the electric tool will be charged and the operator will be electrocuted.
• When operating in the place where the cutting accessories are likely to cut the dark wire or its own wire, the electric tool can only be held through the insulating holding surface. Cutting accessories touching a live wire may electrify the exposed metal parts of the power tool and cause electric shock hazard to the operator
•  Keep the cord away from rotating accessories. If not properly controlled, the cord may be cut or twisted and your hand or arm may be drawn into the spinning attachment.
• Do not put down the power tool until the accessory completely stops moving. Rotating attachments can grab the surface and pull the power tool, causing you to lose control of the tool.
•  Do not operate the power tool when carrying it. Accidentally touching a rotating accessory may entangle your clothes, but the accessory may hurt your body.
• Clean the vents of power tools frequently. The motor fan will be sucked into the casing from the fan, and excessive metal powder deposition will cause electrical hazard.
• Do not operate power tools near flammable materials. Mars could ignite these materials.
•  Do not use accessories that require coolant. Water or other coolant may cause electrical corrosion or electric shock.

Further safety instructions for all operations

Rebound and related warnings
Rebound is a sudden reaction force caused by stuck or entangled rotating grinding wheel, back cushion, wire brush or other accessories. Jamming or winding will cause the rapid stalling of rotating accessories, and then the runaway electric tool will move in the opposite direction of accessory rotation at the jamming point.
For example, if the grinding wheel is entangled or stuck by the workpiece, the edge of the grinding wheel extending into the sticking point may enter the material surface and cause the grinding wheel to climb out or rebound. The wheel may fly to or away from the operator, depending on the direction of movement of the wheel at the sticking point. Under this condition, the grinding wheel may break. Rebound is the result of misuse of power tools and / or incorrect operation procedures or conditions, which can be avoided by tak.ing appropriate protective measures given below.

• Hold the power tool tightly so that your body and arms are in the right position to resist rebound. If there is an auxiliary handle, it should be used all the time, so as to maximize the control of the rebound force or torque when starting. If appropriate preventive measures are taken, the reaction torque or rebound force should be controlled at all times.
• Never put your hand close to the rotating attachment. Attachments may bounce and touch hands.
• Don’t stand where the power tool may move in case of rebound. The rebound will drive the tool to move against the grinding wheel at the winding point.
• Be very careful when working at sharp comers, sharp edges, etc. Avoid jumping and winding of accessories. Sharp corners, sharp edges and bouncing have the tendency of winding the rotating accessories and causing rebound and out of control.
• Do not attach saw chain, woodcarving blade or toothed saw blade. These saw blades will produce frequent rebound and out of control.

Additional instructions for sanding operation

Special safety warning for sanding operation
When sanding, do not use oversized sanding paper. Select sanding paper according to the manufactures recommendation. Large sandpaper beyond the sanding pad is in danger of tearing and can cause entanglement, tearing or rebound of the sanding pad.

Voltage
To plug in the socket and use the power tool, make sure that the voltage of the power supply is consistent with the rated voltage of the tool. If the power supply voltage exceeds the rated voltage of the tool and is used by mistake, it will not only damage the machine, but also hurt people. If the voltage of the socket can not be determined, it must not be used. In addition, if the power supply voltage is lower than the tool specification voltage, it will also be harmful to the operation of the motor.

Machine function

• This machine is one of the series products of our company, belonging to hand-held electric tools.
• This machine is mainly used for internal walls, external walls, corridors and other lime walls. Remove the paint residue on the wall and make the wall smooth. It can effectively improve the efficiency and quality of wall sanding.
• In the design of this machine, the possibility of various working environments is fully considered. It can run at low speed or high speed, realizing the humanized and convenient design.
• Self Sunction Adjustment: The knob above the LED light is used to adjust sunction, You can adjust the knob according to different material planes and sanding effects, if the vacuuming effect is not obvious enough, please turn off the knob as shown.
• Vertical Suspension: When sanding the ceiling, the spring of the machine head can be suspended, which is more convenient for sanding, as shown in the picture.

Technical data

Rated power

No-load speed

| 7.2 (A)

900-1800 (r/min)

Size of sandpaper| ¢>225 (mm)
Safety standard| II/[§]

Product structure (See the following pictures)

Fourteen pieces of abrasive paper, one pair of carbon brushes, one dual- purpose screw driver, one hexagonal wrench, one piece of 1.0 meter dust suction pipe (extended to 4m), one dust collection bag and one carry bag.

Installation and replacement of abrasive paper (see the following

pictures)

Note: Be sure to switch off the tool and disconnect the plug from the power supply before installa­tion and removal of abrasive paper.

Installation procedures

• Place the tool in the flat ground before installation of abrasive paper to ensure replacement quality. First take out the accessory abrasive paper from the tool box and mount it onto the disc (as shown in the picture). Back of the abrasive paper and the disc will adhere automatically with each other to achieve the functions of connection and conduction.
• Sanding efficiency of the tool will reduce after it works for some lime. It is necessary to replace the abrasive paper to improve its sanding efficiency. First turn off the electric tool, and disconnect the power plug; then remove the original abrasive paper. Abrasive paper on the disk shall be completely cleared to ensure that the newly-mounted abrasive paper is flat and firm, and will be easier for future replacement. Finally, put on the new abrasive paper.

About abrasive paper
The drywall sander makes use of the sand gravels on the abrasive paper and rotation of abrasive paper to grind surfaces of walls and other objects when it works. Abrasive paper is classified in sizes. Select the right type of abrasive paper in accordance with disc size of the tool. Abrasive paper can also be classified according to the number of abrasive grains. For abrasive paper of the same size, the more the number of abrasive grains on the paper, the smoother and flatter the sanding effect, correspondingly the sanding efficiency becomes low. On the contrary, for the abrasive paper of the same size, the less the number of abrasive grains on the paper, the higher the sanding efficiency, but the finished surface becomes rough correspondingly. Therefore please purchase the right type of <1> 225 (mm) abrasive paper as actually required during replacement.
warning: Please read carefully the safety instructions and installation procedures before replace­ment and installation of abrasive paper.

Replacement of abrasive paper sanding pad (see the follow­ing pictures)

If an abrasive paper sanding pad is damaged in use, please purchase one from our company and install it to the tool

Installation procedures
Take out the old abrasive paper; insert a hexagonal wrench into the hexagon socket hole in the threaded spindle in the center of abrasive paper sanding pad and rotate clockwise to remove the original sanding pad. Then put on the new abrasive paper sanding pad as shown in the above picture.

Dust suction pipe connection device (see the following pictures)

The product has a self-dust suction function and no extra dust catcher is needed. Dust is produced from the walls when the tool works. The tool itself will draw dust and exhaust it through the dust suction pipe, thus a dust collection bag and dust suction pipe are supplied with the tool. If you need a better dust collection effect, you can directly remove the dust collection tube to connect to the vacuum cleaner, no adapter is needed.

Switch and switches for speed governor and strip light (see the following

picture)

This type of drywall sander has a self-locking switch. When the sander is to be used, press down the main switch to start it; meanwhile, self -lock can be used to lock the sander. When you have to tum off the sander, just slightly press down the main switch, the self-lock pops up and the switch powers off the sander. The speed governor is shown in the following picture. You can adjust it manually to select the right speed. This sander is also a strip- light type for the sake of easy illumination. Specially designed strip-light switch is convenient for operation and thereby improves working quality of operator

Length adjustment

For the convenience of sanding walls of different heights, rod length of this type of drywall sander can be adjusted.

Adjusting procedures of the Drywall Sander:
Unscrew the lock nut and pull the extension rod handle to adjust the length to a proper position; then tighten the lock nut.

Cleaning

Some cleaning work shall be performed regularly or after sanding operation onto the drywall sander.

• Cleaning the tool regularly will prolong the service life of the tool and reduce repair rate. Clean the connection structures and the electrical motor. Do not use water to clean them.
• We suggest that immediate cleaning should be done to the tool after every use.
• Use a hairbrush or dry cloth to clean it or to purge it with high-pressure air.

Replacement of carbon brush (see the following picture)

There is one pair of spare carbon brushes with the tool. When the old carbon brushes are worn out, the backup ones can be used to replace them. Operate like this:
Screw off anticlockwise the carbon brush cover with a straight screw driver; remove the worn-out brushes and install the new ones into the carbon brush holder. Make sure that the brushes can move freely in the holder.

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