Assessments - 1, GPA: 4
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Facilidade de uso
• Before operating the machine, always remove tie, rings, watches and any loose adornments which might entangle with the rotating machinery. • Should the cutter become 'fast' in the workpiece, stop the motor immediately to prevent personal injury. Disconnect from the power source and turn arbor to and fro. DO NOT ATTEMPT TO FREE THE CUTTER BY SWITCHING THE MOTOR ON AND OFF. • If the machine is accidentally dropped, always thoroughly examine the machine for signs of damage and check that it functions correctly before trying to drill a hole. • Regularly inspect the machine and check that nuts and screws are tight. • Always ensure when using the machine in an inverted position that only the minimum amount of coolant is used and that care is taken to ensure that coolant does not drip on to the motor unit. • Cutting tools may shatter, ALWAYS position the guard over the cutter before activating the machine. Failure to do so may result in personal injury. RLL233 Issue 4 Aug 2007 4 • On completion of the cut, a slug will be ejected. DO NOT operate the machine if the ejected slug may cause injury. [3] OPERATING INSTRUCTIONS • Keep the inside of the cutter clear of swarf. It restricts the operating depth of the cutter. • Ensure that the coolant bottle contains sufficient cutting oil to complete the required operating duration. Refill as required. • Occasionally depress the pilot to ensure cutting fluid is being correctly metered. • To start the machine, first switch on the magnet by turning the rotary switch to position <1>. Then start the motor by depressing the GREEN start button. • ALWAYS switch off the motor by depressing the RED stop button. DO NOT switch off the motor by turning the magnet switch to zero. • Apply light pressure when commencing to cut a hole until the cutter is introduced into the work surface. Pressure can then be increased sufficiently to load the motor. Excessive pressure is undesirable, it does not increase the speed of penetration and will cause the safety overload protection device to stop the motor, (the motor can be restarted by operating the motor start button), and may cause excessive heat which may result in inconsistent slug ejection • Always ensure that the slug has been ejected from the previous hole before commencing to cut the next. • Always cut overlapping holes as illustrated above – do not use excessive pressure and ensure cutting fluid is reaching teeth of the cutter. • If the slug sticks in the cutter, move the machine to a flat surface, switch on the magnet and gently bring the cutter down to make contact with the surface. This will usually straighten a cocked slug and allow it to eject normally. • Apply a small amount of light oil lubricant regularly to slide and arbor support bearing. • Cutter breakage is usually caused by insecure anchorage, a loosely fitting slide or a worn bearing in the arbor support. (Refer to routine maintenance instructions). • Only use approved cutting fluid. Rotabroach cutting fluid has been specially formulated to maximise the cutters performance. It is available in 1 litre (RD208), 5 litre (RD229), and 25 litre (RD220) containers. RLL233 Issue 4 Aug 2007 5 SPEED SELECTION The machine is equipped with two speed ranges, High, and Low, and a stepless variation of each range. The speed range is changed by the rotary change switch located on the gearbox side. Do not change gear while the motor is in motion. The stepless variation is adjusted by rotating the disk located on top of the motor. The disk is graduated into six numerically designated segments. Before cutting holes the work piece material specification must be determined to facilitate the correct cutting speed selection (See section 13 Cutting speeds). Site conditions, eg diameter and condition of cutter, material condition, material thickness, etc must also be taken into account when determining the suitable cutting speed. The speed and feed rate must continuously be monitored and adjusted to ensure optimum cutting conditions prevail. [4] EXTENSION CABLE SELECTION The machines are factory fitted with a 3 metre length of cable having three conductors 1.5mm_ LIVE, NEUTRAL and EARTH. If it becomes ...
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