Fault 1: The brake device fails, and the machine runs after starting
Reasons: â‘ Circuit failure; â‘¡ The brake device is out of adjustment (too loose); â‘¢ The copper pad of the brake device is damaged.
Repair: â‘ Check the brake circuit and eliminate the fault; â‘¡ Loosen the brake adjustment screw of the end cap, adjust the end cap clockwise, and then tighten the set screw; â‘¢ Carefully disassemble the brake and replace the copper pad If there are no spare parts, it can be replaced by 0.3mm thick brass skin or PS version lofting shears. Disassembly and assembly must be careful to avoid new faults caused by misalignment or poor assembly. Due to space limitations, detailed disassembly and adjustment methods are omitted.
Fault 2: The host can't run or it's good and bad sometimes, there is heat phenomenon, but the transmission device is normal
Reasons: â‘ The main motor of the circuit or the commutator is faulty; â‘¡ The brake device is out of adjustment (too tight); â‘¢ The brake device is not well maintained and the dirt is too much, filling the chip gap; â‘£ Reason â‘¡ â‘¢ Not timely repair or other reasons As a result, the brake generates excessive heat, the inner core steel sheet fails and deforms, the resistance suddenly increases, and the main engine stops.
Repair: â‘ Check the circuit motor and eliminate the fault; â‘¡ Loosen the set screw of the brake end cover and rotate it counterclockwise at a certain angle to tighten it; â‘¢ Disassemble the brake and clean the parts according to the correct steps; â‘£ Replace the steel partly or completely Chips and copper.
Fault 3: When the main unit is running normally, the jog wheel will rotate with it, or stop when it rotates
Reasons: â‘ Circuit failure, or improper gap of limit switch contacts; â‘¡ The gap between the end face of the excitation wire package of the jog device and the end face of the jog wheel disc is too small, and the rear displacement is squeezed or the foreign body is tight, and it follows due to friction; â‘¢ The bearing of the jog device fails; â‘£ If it rotates from time to time and heats up, the elastic steel sheet fixed by the wheel disc is mostly deformed or fails.
Repair: â‘ Overhaul the circuit and switch; â‘¡ Remove foreign objects, install the excitation coil and the jog wheel correctly, so that the gap between the two ends is 0.4
～ 0.7mm, measure with feeler gauge, 0.4mm is very loose, 0.7mm is enough; ③Check cleaning or replace bearing; ④Replace 3 pieces of spring steel sheet, can be surveyed and processed, but the material elasticity should be appropriate; ⑤Replace 3 pieces of fastening Screws.
Fault 4: The machine fails to jog, but the operation function is normal
Reasons: â‘ Jog circuit failure; â‘¡ If the clutch reacts when the power is turned on and off, and is accompanied by heat, the gap between the end surface of the wheel disc and the wire pack is too large, and the magnetic moment becomes relatively small, so that the end cover and the wheel disc cannot absorb There is relative sliding, and the eddy current is generated by the orthogonal cutting magnetic lines, which causes the disk and coil to heat up. If it is not found in time, it will burn out the clutch or the spring plate; â‘¢ The braking torque is too large.
Repair: â‘ Check the jog circuit; â‘¡ Adjust the clearance between the clutch and the wheel disc properly, the method is the same as before; â‘¢ Adjust the brake device, the method is the same as in Example 2.
Fault 5: Jog synchronous toothed belt break
Reasons: â‘ Fatigue breakage due to years of age; â‘¡ Improper maintenance and use, aging of oil-impregnated rubber, or accidental force breakage.
Repair: â‘ Replace imported parts, part number 00.780.2156 toothed belt; â‘¡ Drawing and processing according to West German DIN standard -33T10x1250 (or surveying and mapping the actual object). The material can be selected from polyurethane or neoprene. The inner core must use steel wire, otherwise the strength is not enough ; Polyurethane tape has many advantages such as oil resistance, wear resistance, cold and heat resistance, easy processing, just make molds. Therefore, hope that manufacturers do not blindly duplicate molds, causing waste, should cooperate with each other, mold sharing; â‘¢ redesign processing belt Rotating with domestic belts;
A. The improved design is a synchronous circular arc toothed belt transmission structure, (that is, HTD belt transmission, wheels and belts are completely replaced);
B. The improved design is the national standard ladder tooth synchronous belt transmission structure;
C. The improved design is the national standard multi-ribbed belt transmission structure;
D. The improved design is the transmission structure of national standard triangle belt or universal belt.
The main design parameters are: transmission ratio i = 8.4; speed n1 = 450 r / min; power 0.28KW, pulley center distance 315mm, belt thickness 5mm, width 33mm.
The above four improved designs have their own characteristics: The A design is the best because it is modified from the shortcomings of the trapezoidal tooth synchronous belt. The arc tooth shape is symmetrically distributed and is uniformly transmitted to the core wire, so it is more synchronous than the trapezoidal tooth The belt can transmit greater torque, and it is convenient to process and low in cost. It has been developed by scientific research institutions; the C design is also simpler and cheaper, and can transmit larger torque, but the tensioning device must be considered because it is the same as D. It is driven by friction tension; the D design is the simplest and the cost is low, but the performance is poor, the transmission torque is small (due to the space limitation of the setting of the tension wheel), it is easy to slip, heat and wear, and the auxiliary repair time is more. All manufacturers are advised to choose the plan with the best comprehensive benefit according to local conditions.
Fault 6: unstable delivery drive
Reasons: â‘ The chain is too loose or too tight, â‘¡ The chain wears seriously and fails, the pitch becomes longer, and the accumulated error is too large, which can cause damage to the sprocket.
Repair: â‘ Check and adjust the center distance of the sprocket to make the tension tight; â‘¡ Replace the new chain when the wear is serious, the drawing number is: 47.014.015; or process the chain according to the D / N standard; or redesign the sprocket chain according to the national standard . Effect: Compared with the purchase of imported chains, the cost can be reduced by 24 times, that is, every time a pair of paper collection chains are changed.
Fault 7: The delivery line swings and the teeth line skew
Reason: The connecting part of the receiving shaft and the chain is worn seriously, sometimes the diameter wear is more than 1mm, the part number is the shaft 00.550.0674, the shaft seat 93.014.305F, 93.014.306F.
Repair: â‘ Expand the bushing of the shaft seat on the boring machine, use 40Cr as a pin, and harden it by grinding; â‘¡ Survey and process the cast steel shaft seat, and the drawings are omitted.
Trouble 8: The take-up and pick-up sheet is not tight
Reasons: ①The fixing screw is loose; ② The gripper spring fails; ⑧ The gripper wears out, ④ The gripper wears out, part number 93.014.310.
Repair: â‘ Tighten the screws, process and replace the wearing parts; â‘¡ Grip the chrome plate of the gripper, local repair emergency; â‘¢ Emergency with local wear-resistant layer.
Trouble 9: rotten paper when gripper transfers paper
Reasons: â‘ The entire row of gripping teeth is uneven and not on the same straight line; â‘¡ The positioning pin at the end of the row is loose or sheared, and the row of teeth is skewed; â‘¢ The paper delivery time is improper, not a "zero connection" delivery.
Repair: â‘ Level the entire row of dental pads; â‘¡ Replace the positioning pins on the end of the tightening row to correct the row; â‘¢ Adjust the position of the open cam plate properly; â‘£ If the cam plate is severely worn, there are two ways to adjust it. Repair: A. Check the wear and tear, calculate the amount of wear, first draw a picture and make a model, repair by welding or brush plating, repair by repairmen; B. Surveying and processing, wear-resistant treatment of the working surface (available EDM, nitriding, etc.).
Trouble 10: The take-up table tilts up
Reason: one end of the paper-receiving balance spring breaks off and the chain is staggered;
Repair: â‘ Reattach the broken spring or change the spring; â‘¡ Reset the chain and balance the two ends of the paper table.
Fault 11: The roller can not be clutched and pressed (one or more groups)
Reasons: â‘ Circuit failure; â‘¡ The clutch piezoelectric magnet in the operation side shield is stuck, broken or burned.
Repair: â‘ Eliminate the circuit fault; â‘¡ Remove the shield and treat symptomatically (A. Remove the blocking obstacle, B. Remove the burnt electromagnet, and re-wind the coil; C. Select the domestic substitute electromagnet, which is used as the disc, Small accessories such as rods and springs, model MQl-5111, suction 3Kg, voltage 220V, working stroke 25mm).
Fault 12: powder sprayer malfunction
Reasons: â‘ The powder spraying potentiometer is broken, part number 00.780.3029; â‘¡ The powder spraying tube is blocked; â‘¢ The powder spraying air pump is broken.
Repair: â‘ Repair or replace the potentiometer, substitute parts are optional; â‘¡ Nozzle discharge plug, symptomatic treatment; â‘¢ Maintenance and repair of powder spray air pump.
Malfunction 13: The slow-moving motor does not rotate
Reasons: â‘ Circuit failure; â‘¡ The fixing screw of the motor base is loose and stuck obliquely; â‘¢ The motor or the transmission device is blocked by dirt; â‘£ The motor is burnt out or the bearing is damaged.
Repair: â‘ Check the circuit and the motor to eliminate the fault; â‘¡ Adjust the position of the motor and tighten the base screws; â‘¢ Maintain and dismantle the motor and the transmission device; â‘£ Replace the damaged bearing.
Fault 14: The slow conveyor belt for receiving paper is broken, part number 00.580.0744
Cause: The rubber ages and the fatigue breaks.
Repair: â‘ Adhesive bonding; â‘¡ Purchase domestic substitute parts or process according to West German D / N3770 standard.
Fault 15: The belt, pulley and pin of the paper conveying part are damaged
Cause: Fatigue damage over time.
Repair: â‘ glue bonding; â‘¡ surveying and mapping, nylon, plastic or bakelite can be used for the pulley, and 45-gauge steel for the pin.
Fault 16: The large compression spring on the swing paper feeder is broken
Cause: Fatigue breaks.
Repair: â‘ Use pressure springs with similar specifications or TT402 machine pressure springs to repair and replace them, emergency; â‘¡ Surveying and mapping
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