Heidelberg HD102V four-color offset press failure repair examples (a)

Fault 1: Failure of the braking device. The cause of the machine coasting after starting: 1 Circuit failure; 2 Disadjustment of the braking device (too loose); 3 Copper pad damage of the braking device.
Repair: 1 check the brake circuit, remove the fault; 2 loosen the brake adjust the end cap set screw, adjust the end cap clockwise an angle, and then tighten the set screw can be; 3 carefully open the brake, replace the copper pad If there are no spare parts, a 0.3mm thick brass skin or a PS plate can be used to cut the drill instead, and care must be exercised when disassembling so as not to cause new faults due to misalignment or poor assembly. Due to space limitations, the detailed disassembly and adjustment methods are omitted.
Failure 2: The host can not run or good or bad, between the occurrence of fever, but the transmission of the normal causes: 1 circuit or commutator main motor failure; 2 brake device misalignment (tight); 3 brake device maintenance is not good, There are too many dirt, and die gaps are filled; 4 Cause 23 The brakes have not been heated in time due to maintenance or other reasons.
The inner core steel sheet failed to deform, the resistance increased rapidly, and the main engine stalled.
Repair: 1 check the circuit motor, troubleshooting; 2 loosen the brake end cap set screws, rotate counterclockwise after a certain degree of fixation; 3 disassemble the brake, after cleaning the parts are assembled in accordance with the correct steps; 4 part or all of the replacement of steel Chips and copper sheets.
Fault 3: When the host computer is running normally, the following points are followed by the jog wheel, or when the clockwise rotation is stopped: (1) Circuit failure, or improper clearance of the limit switch contact; (2) The gap between the excitation wire package end face and the jog wheel end face is too large. Small, after the displacement of the tight or foreign body plug, follow the friction and follow-up; 3 inching device bearing failure;
4 If it is time to stop and turn, and heat, it is mostly the deformation or failure of the fixed elastic steel disc.
Repair: 1 maintenance circuit and switch; 2 remove foreign matter, properly install the excitation wire package and the jog wheel, so that the gap between the two ends is 0.4
~ 0.7mm, measured with a feeler gauge, 0.4mm is very loose, 0.7mm can be; 3 inspection cleaning or replacement of the bearing; 4 replacement spring steel 3 pieces, can be mapping processing, but the material elasticity should be appropriate; 5 replacement 3 fastening Screw.
Fault 4: Machine jog failure, but the normal function of the operation: 1 Jog circuit failure; 2 if the clutch has an action response when the power is turned on and off, accompanied by heat, mostly for the wheel and wire package face gap is too large, magnetic torque Relatively small, so that the end cover and the disc is not tight and relatively sliding, perpendicular cutting magnetic lines generate eddy currents, resulting in the disc, coil heating, if not found, will burn clutches or springs and other pieces; 3 system Momentary torque is too large.
Repair: 1 check the jog circuit; 2 adjust the clutch and the disc clearance is appropriate, the method is the same as before; 3 adjust the braking device, the same method as in Example 2.