1. PLC Control & Automatic Reverse
- Most modern double shaft shredders are equipped with a PLC or microcomputer control system.
- System monitors motor current, torque, and running status.
- When a hard object or overload is detected, shafts automatically reverse to release material and then return to normal operation.
- Helps prevent cutter damage, gearbox failure, and motor burnout.
2. Electrical & Mechanical Protection
- May use thermal overload relays, circuit breakers, current sensors, and torque limiters.
- If load exceeds the set value, the system can stop feeding, reduce speed, or shut down the machine.
- Some models use hydraulic drive or hydraulic pressure detection to adjust shaft speed and avoid complete blockage.
3. Repeated Reverse & Alarm Logic
- When jamming occurs, the machine usually does not reverse only once.
- It may stop, reverse, pause, and try forward rotation again.
- If overload cannot be cleared after several attempts, the system stops and sends an alarm.
- Operators must check the chamber, remove foreign objects, and reset the machine before restarting.
4. Confirm Protection Details Before Purchase
- Overload protection is standard on many models, but the exact method varies by manufacturer.
- For export projects, confirm PLC automatic reverse, thermal protection, alarm display, hydraulic protection, and English operation instructions.
- Ensures safe operation and easier maintenance in overseas plants.
