How To Quickly Handle A Shredder Machine Malfunction?

I. Immediately stop the machine and ensure safety.

Press the emergency stop button immediately to cut off the main power supply. This is the first step in handling any malfunction. Operating with the power on may cause secondary damage to the cutters, burn out the motor, or cause electric shock.

Hang a "Under Maintenance" warning sign in a prominent location on the equipment to prevent accidental startup.

Wait until the equipment has completely stopped running before conducting any inspections, especially for high-speed rotating parts.

II. Take targeted measures based on the type of malfunction.

1. Cutter shaft jamming or overload shutdown (most common)

Prioritize using the "jog reverse" function: Most modern shredder machines are equipped with intelligent control systems. You can briefly click the "reverse" button on the control panel to use reverse torque to gradually remove the jammed material.

Manual cleaning: If reversing is ineffective, use a special wrench inserted into the emergency rotation hole and slowly rotate counterclockwise (no more than 30 degrees at a time). A "click" sound indicates that the jammed material has loosened. Then carefully remove the foreign object with a long-handled hook.

Strictly prohibit forced start-up or prying of the cutter shaft with tools, as this may cause permanent damage to the gearbox or spindle.

2. Abnormal Noise or Severe Vibration:

After stopping the machine, check the condition of the bearings and cutters:

A "rustling" sound usually indicates insufficient lubrication or dust ingress in the bearings; add high-temperature grease or replace the seals.

A "clicking" impact sound may indicate loose or chipped blades; check and tighten the bolts and replace any damaged blades.

Continuous vibration suggests spindle imbalance or loose foundation bolts; rebalance the dynamic balance and reinforce the foundation.

3. Uneven Output or Decreased Production:

Check for screen blockage or damage: Open the discharge port and use a high-pressure air gun to blow the screen backward to remove sticky materials; if the screen is deformed or has holes, replace it immediately.

Assess blade wear: When the output particle size is significantly larger than the set value and the cutting edge radius exceeds 0.5mm, the blades must be re-sharpened or replaced. Check the transmission system: A loose belt can cause insufficient power transmission. Adjust the tension or replace the belt.

4. Motor overheating or electrical fault:
Check if the power supply voltage is stable and if the wiring is aging or has poor contact.

Check the PLC control module alarm codes. Modern equipment has self-diagnostic functions and can quickly locate problems (such as overcurrent, overtemperature, sensor malfunction).

Check the lubrication system: Dry bearing friction will transmit resistance to the motor, causing overload and overheating. Add lubrication and check the oil circuit.

5. Tool chipping or breakage (serious fault):

Immediately stop the machine and clean up debris: Use a long-handled tool to thoroughly remove broken blade fragments to prevent secondary damage to other parts.

When replacing blades, pay attention to dynamic balancing: The weight difference between the old and new blades should not exceed 5 grams. Tighten the bolts in a diagonal sequence and run the machine idle for 5 minutes to test its smoothness.

Analyze the cause of breakage: Is high-hardness foreign matter (such as manganese steel or stones) mixed in? Strengthen pre-feed sorting.

III. Confirmation Procedures Before Resuming Operation
1. Confirm that no tools or materials are left in the chamber.

2. Check that all protective covers, safety light curtains, and emergency stop buttons are reset.

3. Start the equipment under no-load and observe whether the operation is smooth and whether there are any abnormal noises.

4. Gradually add small amounts of material, and resume full-load operation only after confirming that the material output is normal.