Solution to increase productivity and reduce waste for PP bag weaving machine

The solution of using INVT’s GD20/GD200A multi-function inverter to synchronously control the speed of the main motor system and the motors that pull the bag, pull the thread, and roll the bag, helps PP bag weaving machine operate stably, easily adjust and change orders, increase weaving speed, reduce waste and reduce machine downtime.

PP bag weaving machine uses PP yarn rolls to form PP film rolls before being coated and cut into finished bags for industries such as fertilizer, chemical, food, animal husbandry and many other fields.

The old operating method, weaving motors, thread traction motors and winding motors run directly on mains electricity and are independent of each other.


  • The star-delta starter main motor causes mechanical shock, breaks the thread, greatly affects the needle, belt/belt, pulley, and bearing parts.
  • The main motor runs at 1 speed, so the machine can only meet a few products
  • Thread pulling motor and bag pulling motor run independently, so it is difficult to adjust the machine, depending on the operator’s experience
  • Time consuming and costly maintenance
  • The coil motor runs independently of the main motor, so the PP bag rolls unevenly. Low product quality, a lot of waste products


Using GD20/GD200A inverter to control main motor, bag traction motor, thread traction motor and winding motor, the inverters are synchronized with each other.



  • Synchronized system, easy to operate
  • Improve productivity and product quality
  • Reduce maintenance time, maintenance
  • Engine protection, mechanical shock resistance
  • Saving energy by adjusting the motor speed to the required load
  • Complete solution, quick and easy installation. 24/7 service
Are you still hesitant, worried about efficiency?
Take a look at DAT's specialized solution design process.

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Products for solutions

GD20 - versatile, compact, easy-to-use open-loop inverter series with outstanding responsiveness for almost all applications.
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GD200A - inverter is designed for both heavy loads (constant torque – G load) and variable loads (fan pump – P load).
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GD35 - advanced closed-loop vector control with 7 control modes: speed, position, torque, speed/torque, position/speed, position/torque and speed control full closed loop control
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GD350 - INVT's most advanced multi-function inverter series with world leading vector control technology, meeting diverse control requirements with high efficiency.
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