7. operating the multipress - Grass

8. TROUBLE-SHOOTING AND CORRECTIVE ACTION8-203 The horizontal bore head motor does not runPneumatic problems:- Remove all drill bits from the horizontal bore head.- Place the test workpiece on the machine table and press against the stop pins 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.- Remove the pneumatic hose “H” from the non-return throttle valve “12” on the switchgear cabinet(illustration 4-002-06) and check if the activated horizontal bore head start button releases air to thepneumatic hose. If there is no air, then the problem lies with the pneumatic control.Electrical problems:- Is the machine plugged in?- Check the safety fuses in your factory distribution panel.- Is the main switch turned on?- Turn off the machine with the main switch. Open the switchgear cabinet with the corresponding key andpress the red button of the thermal excess current release. Check the automatic safety switch. Close theswitchgear cabinet.- Turn on the main switch.Mechanical problems:- Turn off the main switch. Check one of the threaded spindles on the drill gearbox to see if it can be turnedmanually. The fan wheel in the electric motor should also turn. If not, the gearbox is damaged.If the above tips do not help, please call in a pneumatic technician (see pneumatic diagram, section 4-006)or a licensed electrician (see wiring diagram, section 4-007).8-204 The horizontal bore head does not move forward- Turn off the main switch.- Check the compressed air supply line.- Check the air pressure with the compressed air gauge (manometer). It should be 5.5 - 6 bar.- Check to make sure all pneumatic lines are secure and not loose inside the Multipress. Also check the linesfor any damage.- Adjust the non-return throttle valve “13” (illustration 4-002-03) in + direction as far as possible.- Remove all drill bits from the horizontal bore head.- 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.- Remove the back pneumatic hose from the pneumatic cylinder and check if air escapes from the pneumaticline when the horizontal bore head start button is activated. The cover on the back must be removed todo this.Warning: Keep hands away from moving parts. If air comes out, then the problem lies with the pneumaticcylinder. If no air comes out, then the problem lies with the controls.If the above tips do not help, please call in a pneumatic technician (see pneumatic diagram, section 4-006).The star in your cabinet101