DISCO DAD 2H/6T, Troubleshooting Manual

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7) Insert a screwdriver into the space over Z-axis and check that Z-axis moves smoothly from the upper
limit to the lower limit.
8) Check that the helical coupling set between the Y-axis motor and the Y-axis ball screw, is tight.
(2) Points to be checked after turning on the Power
1) Enter cutting data after turning on the power. Check brightness of microscope view and if adjustment is
necessary, refer to “Adjustment of Microscope Illumination Brightness” in the Operation Manual.
2) Remove the front cover and move X-axis manually from the right limit to the left limit to check the
machine for abnormal sound. Check that the timing belt is not broken.
3) Lift the main body cover and move Y-axis from the back limit to the front limit to check that water hose,
waterproof gum, press board, or the like are not pinched anywhere.
4) Check that the speed of the spindle reaches 30,000r.p.m. within five to ten seconds after turning it on
and that the spindle stops rotating three to six seconds after turning it off.
If adjustment is necessary, refer to “Adjustment of Spindle Motor Revolution” in the Operation Manual.
5) Remove the chuck table and turn on the VACUUM switch. Close the openings on the top surface of
rotary ring with a finger and the pointer of the vacuum meter should then deflect to the green zone. If it
deflects to the red zone, air pressure may be abnormal or the tubing may be broken.
Further check that there is no foreign matter in the “CONVUM”.
6) Be sure to check all functions listed above before operating the machine.
3. Monthly Inspection, Maintenance and Adjustment
1) Are the timing belts for the X-axis drives free from cracking, splitting anf other defects?
2) Is the mist separater’s interval element dirty?
If the surface of the filter element has become red, please change the element (normal color is white).
Please inspect the air tubing, air dryer etc. When checking if there is any oil other contamination on the
inside wall of the sighting glass.
3) Are all ducts and drainpipes clear and free from obstructions?
4. Spindle Inspection
If oil, water or dirt get into the air being supplied to the spindle, a critical spindle malfunction will occur.
Therefore it is of the utmost importance to make sure that the compressor, air filters and air drier are
properly maintained. Prior to use, supply air to the spindle for several minutes, turning the shaft lightly with
your fingers. This will detect unusual spindle operation and also help to remove moisture from the spindle.
If in manually rotating the spindle you feel it binding and not tuning smoothly, remove the bearing air
connector and inject several cc of fleon 113 into the hose. After reconnecting the hose, blow air through it.
This will effectively remove oil and dirt from around the spindle shaft. If this operation is repeated several
times without any effect, special disassembly and cleaning will be required. Please contact our local service
office about this.
880930