7. operating the multipress - Grass

8. TROUBLE-SHOOTING AND CORRECTIVE ACTION8-2 Horizontal bore head8-201 The drilling height is not correct - adjusting the digital position indicatorIllustration 8-201-01Tools needed:2 mm Allen keyPrecise measuring device, such as a caliper gauge- Turn off the main switch.- Remove all quick-change drill chucks and drill bits from the gearbox. (See section 7-202).- Fasten a drill bit in the zero position of the horizontal gearbox.- See illustration 7-401-01 for spindle placement.- Turn the main switch back on.- Set the required drilling depth. (See section 7-402).- Place the test workpiece on the machine table and press it against the stop pin on the fence.- Swing the insertion die arm down to the stop.Caution: The distance between the hold-down plate and the workpiece to be clamped should not bemore than 6 mm.If the space is more than 6 mm, a thicker hold-down plate must be used.- Clamp the workpiece with the hold-down plate. The selector switch for the clamped workpiece is “3” inillustration 4-004-01.- Press the horizontal bore head start button “4” (illustration 4-004-01) with the second hand until the borehead reaches the drilling depth set by means of the revolver stop “3” (illustration 7-401-01).- Loosen the workpiece. The selector switch for the clamped workpiece is “3” in illustration 4-004-01.- Measure the drilling height of the test workpiece.- If the measured amount does not match the set amount, then loosen the set screw “1” in the digitalposition indicator “2” (illustration 8-201-01) and twist the stop ring “3” until the value indicated is the sameas the value measured. Tighten the set screw again.- Test drill again and evaluate. If necessary, repeat the adjustment process until both values are the same.Caution:While the machine is being operated: keep hands clear of the danger area around the hold-down device,the insertion die arm and the gearbox. The safety information given in section 2 is to be followed wheneverthe machine is being operated.8-202 The horizontal feed speed cannot be adjustedPossible problems:- The non-return throttle valve (item 19 in the pneumatic diagram) is defective.If this is the case, please contact a pneumatic specialist or the Grass Service Center.The star in your cabinet99