Multihead Weigher Troubleshooting: 8 Common Problems and Quick Checks

A multihead weigher is designed for continuous and accurate weighing. However, during daily production, operators may occasionally encounter issues such as inaccurate weighing, uneven feeding or hopper problems.

Before contacting technical support, there are a few basic checks you can perform yourself. This guide covers 8 common multihead weigher problems and simple ways to identify possible causes.

1. Inaccurate Weighing

Possible reasons:

• Product residue inside the weigh hoppers.

• The machine is not installed on a stable, level surface.

• Weighing hoppers are not properly installed.

Quick checks:

• Check and clean any product residue.

• Make sure the machine is level and stable.

• Check that all weighing hoppers are correctly positioned.

2. Uneven Material Feeding

Possible reasons:

• Uneven product distribution on the top cone.

• Material buildup on the linear feeders.

• Incorrect feeding settings.

Quick checks:

• Check whether material is evenly distributed.

• Remove any product buildup after safely stopping the machine.

• Check the current feeding settings against the recommended parameters.

3. Slow Weighing Speed

Possible reasons:

• Insufficient material supply.

• Unstable feeding.

• Product sticking or accumulating in the hoppers.

Quick checks:

• Make sure the feeding system supplies enough material.

• Check whether the material flows smoothly into the hoppers.

• Check for product buildup or blockages.

4. Hopper Door Not Opening

Possible reasons:

• Product stuck around the hopper door.

• Foreign objects blocking the door.

• An issue with the hopper drive mechanism.

Quick checks:

• Stop the machine and check for trapped material.

• Check whether the hopper door can move freely without forcing it.

If the door still does not operate normally, contact technical support.

5. Material Sticking to the Hopper

Possible reasons:

• Product characteristics, such as moisture or surface stickiness.

• Product residue left inside the hopper.

• Unsuitable contact surfaces for the material.

Quick checks:

• Check whether material remains on the hopper surface.

• Clean the contact surfaces according to the machine cleaning instructions.

• If sticking continues, consult TOUPACK about suitable hopper designs or surface treatments.

6. Unstable Weight Readings

Possible reasons:

• External vibration.

• Machine instability.

• Product or foreign objects interfering with the weighing hoppers.

Quick checks:

• Check whether the machine is installed securely.

• Look for nearby equipment causing excessive vibration.

• Check whether the weighing hoppers are clean and correctly installed.

7. Machine Alarm

Possible reasons:

• A hopper or door has not returned to its normal position.

• Material blockage.

• An electrical or control system warning.

Quick checks:

• Read the alarm message on the touchscreen.

• Check the corresponding hopper or component for visible obstructions.

• Record the alarm code before contacting technical support.

Do not reset repeatedly without understanding the alarm message.

8. Some Hoppers Not Feeding

Possible reasons:

• Uneven material distribution.

• Blocked linear feeders.

• Incorrect feeding settings.

Quick checks:

• Check whether material reaches all feeding channels.

• Look for material buildup on the linear feeders.

• Check whether the feeding settings are correct.

Before Contacting TOUPACK Technical Support

If the problem cannot be resolved through these basic checks, please prepare the following information:

• Machine model and serial number.

• Alarm code or error message, if available.

• A short video showing the problem.

• Product name and current operating conditions.

This information helps our technical team identify the possible cause more efficiently.

Important Safety Note

Always stop the machine, disconnect the power and follow the equipment manual before cleaning or checking internal components. Do not open electrical cabinets, adjust load cells, modify control parameters or disassemble drive mechanisms unless authorized and qualified to do so.

If the issue involves electrical components, sensors, control boards or mechanical drives, contact qualified technical personnel.

Need Help with Your Multihead Weigher?

TOUPACK provides technical support and customized weighing solutions for different food products and production requirements. Contact our team if you need assistance with your equipment.