Husqvarna PG 820 Planetary Floor Grinder/Polisher 965195613, 32", 480V, 3PH Electric Motor

Safety Information

Husqvarna PG 820 Floor Grinder/Polisher

MACHINE´S SAFETY EQUIPMENT

General

WARNING! Never use a machine with faulty safety equipment. The machine’s
safety equipment must be checked and maintained as described in this section.
If your machine fails any of these checks contact your service agent to get it
repaired.
This section describes the machine′s safety equipment, its purpose, and how checks and maintenance should be carried out to ensure that it operates correctly.

Power button

This button, when depressed, will turn on power supply to the unit when the EMERGENCY STOP button has been released

Checking the power button

• Check that the emergency stop button is not pressed by turning it clockwise.
• Press the power button. On doing so, a soft 'clunk” should be heard to come from within the electrical cabinet. This indicates the line contactors have
engaged, supplying power to the drives/frequency converters.
• Press the emergency stop
• Turn the stop/run switch to ”RUN”.
• The machine must not start.

Stop/run switch

The Stop/run switch is used to turn the engines on and off.

Checking the stop/run switch

Check that the emergency stop or machine stop button are not pressed by turning them clockwise.
• Press the power button.
• Reduce the pressure between grinding disc and floor by pushing down the handle without lifting the grinding unit from the floor when starting.
• Switch the machine to run mode using the STOP/RUN switch on the control panel. The machine should start smoothly and accelerate to the selected speed over a
period of 5 seconds
• Turn the stop/run switch to ”STOP”.

Emergency stop

The emergency stop is used to quickly switch off the engine. The emergency stop at the machine breaks the mains power supply.

Testing the emergency stop

• Press the emergency stop. Check that the engine stops.
• Disengage Emergency Stop button (twist clockwise)

Reset button

• The Reset button is used to reset any active faults in the Vacon computer drives that can be caused during operation, such as ’Over Current’ or ’Under Voltage’.
Once Reset the machine will return to normal functionality.

General safety precautions

This section describes basic safety directions for using the machine. This information is never a substitute for professional skills and experience.
• Please read the operator’s manual carefully and make sure you understand the instructions before using the machine. Save all warnings and instructions for
future reference.
• Keep in mind that it is you, the operator that is responsible for not exposing people or their property to accidents or hazards.
• The machine must be kept clean. Signs and stickers must be fully legible.

Always use common sense

It is not possible to cover every conceivable situation you can face. Always exercise care and use your common sense. If you get into a situation where you feel unsafe, stop and seek expert advice. Contact your dealer, service
agent or an experienced user. Do not attempt any task that you feel unsure of!

WARNING! The machine can be a dangerous tool if used incorrectly or
carelessly, which can cause serious or fatal injury to the operator or others.

Never allow children or other persons not trained in the use of the machine to
use or service it

Children shall not play with the appliance.

Never allow anyone else to use the machine without first ensuring that they
have read and understood the contents of the operator’s manual. Never use the
machine if you are fatigued, while under the influence of alcohol or drugs,
medication or anything that could affect your vision, alertness, coordination or
judgement

WARNING! Unauthorized modifications and/or accessories may lead to serious
injury or death to the user or others. Under no circumstances may the design
of the machine be modified without the permission of the manufacturer.

Do not modify this product or use it if it appears to have been modified by others.

Never use a machine that is faulty. Carry out the checks, maintenance and service
instructions described in this manual. Some maintenance and service
measures must be carried out by trained and qualified specialists. See
instructions under the heading Maintenance.

Always use genuine accessories

WARNING! Never allow children to use or be in the vicinity of the machine.

WARNING! Overexposure to vibration can lead to circulatory damage or nerve
damage in people who have impaired circulation. Contact your doctor if you
experience symptoms of overexposure to vibration. Such symptoms include
numbness, loss of feeling, tingling, pricking, pain, loss of strength, changes
in skin color or condition. These symptoms normally appear in the fingers, hands or wrists. These symptoms may be increased in cold
temperatures.

Work area safety
• Observe your surroundings to ensure that nothing can affect your control of the machine.
• Do not use the machine in bad weather, such as dense fog, rain, strong wind, intense cold, etc.
Working in bad weather is tiring and can lead to dangerous conditions, e.g. slippery surfaces.
• Never start to work with the machine before the working area is clear and you have a firm foothold.
• Ensure that the working area is sufficiently illuminated to create a safe working environment.
• The machine should not be used in areas where potential for fire or explosions exist.

Electrical safety

WARNING! There is always a risk of shocks from electrically powered
machines. Avoid unfavorable weather conditions and body contact with
lightning conductors and metal objects. Always follow the instructions in the
Operator’s manual to avoid damage.

Never connect the machine to a outlet if plug or cord is damaged.

• Check that the mains voltage corresponds with that stated on the rating plate on the machine.
• Inspection and/or maintenance should be carried out with the motor switched off and the plug disconnected.
• Always shut down the machine before disconnecting the power plug.
• Always unplug the machine during longer work breaks.
• Never drag the machine by means of the cord and never pull out the plug by pulling the cord. Hold the plug to disconnect the power cord.
• Never use the machine if any cable is damaged, but hand it in to an authorized service workshop for repair.
• The machine must never be driven to such a depth in water that it reaches up to the machine’s equipment.
The equipment can be damaged and the machine can be live, resulting in personal injuries.

Grounding instructions

WARNING! Improper connection can result in the risk of electric shock.
Contact a qualified electrician if in doubt as to whether the appliance is properly
grounded.

Do not modify the plug. If it will not fit the outlet have a proper outlet installed by a qualified electrician. Make sure local
regulations and ordinances are followed.

If the grounding instructions are not fully understood contact a qualified
electrician.

• The machine is equipped with a grounded cord and plug and should always be connected to a grounded outlet. This reduces the risk of electric shock in the
event of malfunction.
• The use of adaptors is not allowed with the machine.

Extension cords and cables

• The marking on the extension cable must be the same or higher than the value stated on the machine’s rating plate.
• Use grounded extension cable
• When operating a power tool outdoors, use an extension cord suitable for outdoor use. Use of a cord suitable for outdoor use reduces the risk of electric shock.
• Keep the connection to the extension cord dry and off the ground.
• Keep cable away from heat, oil, charp edges or moving parts. Damaged or entangled cable increase the risk of electric shock.
• Check that the cables are intact and in good condition.
Never use the machine if any cable or plug is damaged, but hand it in to an authorized service workshop for repair.
• To avoid overheating do not use the extension cord while it is rolled up.
• Ensure the cord is behind you when you start to use the machine so that the cord will not be damaged.

Work safety

• Never leave the machine unsupervised with the motor running.
• Make sure that there is always another person close at hand when you use the machines, so that you can call for help if an accident should occur.
• Keep all parts in good working order and ensure that all fixtures are properly tightened.
• Machinery should only be started when grinding heads are resting on the ground unless carrying out a testing procedure as outlined in this manual.
• The machine should not be started without the rubber dust skirt attached. It is essential a good seal between machine and floor be established for safety, especially when operating in dry grinding application

Transport and storage

• Extreme caution must be used when moving machinery by hand on an inclined plane. Even the slightest slope can cause forces/momentum making the machinery impossible to brake manually.
• The machine should not be lifted by handles, motor, chassis or other parts. Transportation of the machine is best done on a pallet / skid to which the machine
must be firmly secured.
• At no time should lifting of machinery be attempted without mechanical means such as a hoist or fork lift.
• Do not attempt to slide the tines/forks from a fork lift under grinding heads unless on a pallet/skid. Failure to do so can cause irreparable damage to grinding
heads of machine and internal parts.
• Secure the equipment during transportation in order to avoid transport damage and accidents.
• The machine should be transported under cover where possible, limiting the exposed to natural elements – in particular rain and snow.
• It is recommended that machinery be transported with a set of diamonds attached at all times to ensure protection of locking mechanism for diamond plates.
• Store the equipment in a lockable area so that it is out of reach of children and unauthorized persons.
• The machine should always be stored in a dry place when not in use.

Speed and direction of rotation

General

Planetary head and grinding heads are run with separate motors, so called Dual Drive Technology™. This gives the operator fully control of both planetary head and satellite heads in regards to speed and direction of rotation.
Speed and direction of rotation is set using the controls on the control panel.

1 Speed control for planetary head rotation
2 Speed control for grinding heads
3 Direction control for planetary head rotation
4 Direction control for grinding heads

Speed

When starting the machine for the first time on any given application, it is advised the speed setting should not exceed 7, initially.
When the operator is comfortable with the application, speed may be altered.

Direction of rotation

Seen from underneath the machine, the direction of rotation is as follows:
• REV - Clockwise.
• FWD - Reverse.

The machine will 'pull” to one direction during operation.
The direction of pull is determined by the planetary head direction of rotation. The head of the machine will pull to the right (and therefore, will be felt on the right hip of the operator) when the planetary head is set in the REVERSE
direction.

This sideways pull can be very useful when grinding, particularly along a wall. Set the machine so that it pulls towards the wall, and then control the machine so it can just touch the wall. This will ensure a grind close to the wall or object.

NOTICE! Planetary head and grinding heads are set to both turn in the same direction (i.e. both in clockwise rotation or both in counter-clockwise rotation).

A more powerful grinding force is created when both planetary head and grinding discs heads are running in the same direction. The end result is higher productivity than when the discs are set to run in opposite directions.
It is here that you will also experience the beneift of Dual Drive Technology™.

To improve the cutting efficiency of diamonds, change directions on a regular basis. This will work both sides of the diamond crystals, keeping the abrasives as sharp as possible by creating maximal exposure of the diamond crystal.