7. operating the multipress - Grass

8. TROUBLE-SHOOTING AND CORRECTIVE ACTION8-1 Vertical bore head8-101 The drill hole spacing is not correct - adjusting the digital position indicatorIllustration 8-101-01Tools needed:2 mm Allen keyPrecise measuring device, such as a caliper gauge- Turn off the main switch.- Lift up the front gearbox cover.- 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 line drilling spindle.- See illustration 7-401-01 for gearbox placement.- Turn the main switch back on.- Place the test workpiece on the machine table and press it against the stop pin on the fence.- Press the vertical bore head start button with the second hand until the depth gauge ends the drilling cycleor until the bore head reaches the drilling depth set by means of the knurled screw “6” (illustration 4-002-03).- Measure the bore hole spacing on the test workpiece and compare with the value set on the digitalposition indicator “1”.If both the values are not the same:- Loosen the set screw “2” with the 2 mm Allen key and twist the stop ring until the value indicated is thesame as the measured value. Tighten the set screw.- Test drill again and evaluate.- Repeat the adjustment process until both values are the same.8-102 The vertical drilling depth is not correct - adjusting the mech. position indicatorIllustration 8-102-01Tools needed:2 mm Allen keyPrecise measuring device, such as a caliper gauge- Turn off the main switch.- Lift up the front gearbox cover.- 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 line drilling spindle.- See illustration 7-401-01 for gearbox placement.- Remove the adjustment component on the depth gauge. See section 7-302.- Turn the main switch back on.- Place the test workpiece on the machine table and press it against the stop pin on the fence.- Set the material thickness of the test workpiece. See section 7-301.- Press the vertical bore head start button with the second hand until the depth gauge ends the drilling cycleor until the bore head reaches the drilling depth set by means of the knurled screw “6” (illustration 4-002-03).- Measure the bore hole spacing on the test workpiece. It should be 13 mm.- If something other than 13 mm is measured, loosen the star knob “3” and adjust the knurled screw “2”(illustration 7-301):If the measured value is smaller than 13 mm -> twist the knurled screw counterclockwise.If the measured value is larger than 13 mm -> twist the knurled screw clockwise.Always check the difference between 13 mm and the measured value.- Test drill again and measure. Repeat until the required 13 mm is attained.- When the 13 mm has been successfully reached, tighten the set screw “1” and the star knob “3”.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.The star in your cabinet91