Main shaft is directional corrective maintenance

Inkstone goes out when changing a knife the machining center of FANUC-6M system changes general of newspaper of 2 appearance shade 2009# appears to call the police when the knife, should call the police the meaning of date is main shaft directional breakdown. This main shaft is machinery directional, namely after main shaft receives the directional instruction M19 that gives out to numerical control system, main shaft rotates slowly with the directional speed of set, find main shaft to locate dish of semicircle annulus fixed position that go up after groove, the fixed position of lower end of piston of directional oil cylinder annulus enter chamfer of this fixed position, main shaft machinery is directional, the circle that carries on the piston right now bumps into an induction directional and adjacent switch, give NC main shaft directional reply, main shaft fixed position ends (see figure below) . The cause that causes this reason ferry may be ① PLC without main shaft side of directional instruction draw together outputs signal, breakdown of crock of hydraulic pressure of ② fixed position, breakdown of a powerful person of electromagnetism of ③ fixed position, ④ is close to switch reason ferry. The main shaft that outputs via diagnosing PLC is directional signal 6.

1 for 1, and main shaft is directional return signal 38.

1 for 0, be close to switch with metallic body response, directional return signal 38.

1 for 1, because this eliminates PLC not to have main shaft,directional command signal outputs breakdown, also eliminate to be close to switch and circuit breakdown. Observe via experimenting for many times, main shaft rate falls to set rate slow when rotating, the piston of directional oil cylinder does not issue main shaft fall, machinery is carried on knock piston, the piston also does not have reaction, because this may be hydraulic pressure oil cylinder,have trouble, make main shaft directional failure. Disassemble hydraulic pressure oil cylinder, the fixed position that discovers oil cylinder piston bolts the horizontal stroke is put inside hydraulic pressure crock continuously, make the piston cannot move up and down, reinstall oil cylinder and adjust the breakdown after the fluctuation position that is close to switch is eliminated. 2.

The manipulator that manipulator blocks to change a knife to interrupt machining center of FANUC OiKA system gets stuck, change a knife to interrupt. The buckles claw and face of main shaft front to go up fixed position protruding of classics observation manipulator the opposite malposition of be good at A, make change knife failure. The cause that causes this trouble is to change fixed position of the main shaft when the knife to forbid to cause. Fixed position of this main shaft is to pass positional coder to be moved by main shaft drive implement finish. After numerical control system issues directional command signal, detect main shaft driver returns charm the directional signal that finish, arrive when check side when directional and referenced position, electric machinery of control main shaft is relatively directional and referenced in had turned dormant lock is dead after an angle. This angle can be revised at will through parameter adjust. The fixed position that the positional deflection capacity when because this need adjusts main shaft,fixed position stops will come to adjust those who trade knife arm buckle claw and main shaft end panel to go up be good at the position affects. Turn main shaft machinery with spanner an angle, the chamfer of the fixed position that buckle claw that makes the fixed position key on main shaft end panel enters the arm that change a knife (so that undertake main shaft,the key of fixed position protruding that gets on face of main shaft front with earmark pen right now makes one number in the position on main shaft flank directional adjust) , according to weak condition the measure that change a knife makes change a knife to finish a loop. Let main shaft for many times locomotive fixed position, observe fixed position stops deviation, through parameter 4077 (the deflection when main shaft fixed position stops child) undertake adjustment, from - 1300 adjust - 950 hind location is exact, encounter whole it is normal that after reaching the designated position, the knife is changed. 3.

Condition of out of control is in after main shaft electrify an entrance machining center, in machine tool electrify (main shaft servo also electrify) when, did not key in MIS to assist functional code, main shaft presses M04 (anticlockwise) direction rotates with the rotate speed proper motion of 50r/min. If key in M03 or M04 again,reach S** right now (rotate speed code) hind, the system does not grant to carry out, also do not call the police, condition of out of control is in after main shaft electrify namely. Because system of this machine tool is embedded PLC but controller of process designing interface, reason should be checked from echelon graph first. By echelon graph initialization program is checked know, the main shaft after electrify of main shaft servo should instantly directional, so that change cutting tool, and right now main shaft rotates ceaseless, and do not grant to implement MIS code, exterior phenomenon gives priority to axial out of control, be in via analysing germ main shaft has a problem in directional outfit. By PLC initialization program knowable, the W7 of mouth of output of the PLC after electrify - 6 should buy is " 1 " , control exterior relay by this again KA12, its contact regards servo of control main shaft as directional switch signal again. It is via checking this signal " 1 " , normal. KA12 also is sucked close and contact closes good, demonstrative main shaft is directional control part is normal. Estimation problem may go in loop of directional check side. The check side component that tries this loop with oscillograph side rotates one by one 3 inputs of transformer, thing goes signal weaveform, all do not have unusual appearance, and signal cable also can normal join arrives main shaft servo foot of 7 printed board beat a drum, had inserted test-drive of this board electrify, breakdown as before, great likelihood is in final cognizance breakdown 7 printed board, unplug issue this to imprint drama board, press along change coming back implement signal inserts a foot to check, the double fortune that discovery handles these signal puts collect to become a CA747 to burn out, cause main shaft directional signal cannot writing brush piece. After changing, breakdown is eliminated. Anyhow, directional breakdown involves main shaft to be adjusted to mechanical, hydraulic pressure, parameter, the knowledge of the many sided such as installation of li of check side, PLC, circuit board, component, the phenomenon when occurrence breakdown also each are different, need is specific a problem is specific analysis. In addition, knife of Kong Tui of anxiety of essence of life and of a few machine tools shift gear as directional as main shaft also about, because the train of thought when this maintenance wants to widen, breakdown is diagnosed should help somebody attain his aim, can omit armour otherwise some important maintenance clue, bring about maintenance speed and the fall that maintain quality. CNC Milling CNC Machining