Common Signal Matching Issues in Multihead Weighers: Troubleshooting Guide for Accurate Packaging
At Kenwei, we value customer feedback and aim to resolve common challenges users face with multihead weighers (combination scales). Below, we address frequently asked questions related to signal matching problems in combination scales, providing clear solutions to improve performance and efficiency.
Q1: Why does the combination scale discharge only when the request signal disconnects?
Explanation:
Kenwei combination scales offer four request signal detection modes:
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0: Pulse with memory
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1: Pulse without memory
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2: Level with memory
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3: Level without memory
Pulse signals are valid on the falling edge (when the signal changes from ON to OFF), while level signals are valid on the rising edge (when the signal turns ON).
If the scale discharges only when the signal disconnects, the detection mode is likely set to 0 or 1 (pulse mode).
Solution:
Set the detection mode to 2 or 3 (level-based) for continuous operation.
Q2: Why does the combination scale discharge material when the packaging machine stops, or why does it sometimes pause?
Explanation:
The difference lies between memory and no-memory modes:
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Memory mode: The system immediately prepares for the next discharge upon receiving a request signal.
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No-memory mode: The scale waits until it’s ready before accepting the next signal.
In Mode 2, if the packaging machine issues the next request signal before stopping, the scale will still discharge. In Mode 3, if the scale isn’t ready, it won’t process the signal, leading to occasional pauses.
Solution:
Adjust the packaging machine’s signal program. When stopping, ensure the machine checks for pending signals:
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If a request has been issued, finish that cycle before stopping.
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If not, stop immediately after the current cycle.
Q3: Why does material sometimes fall during sealing?
Explanation:
This occurs when the discharge signal delay is too short. This parameter ensures that materials completely fall into the bag before the packaging machine seals it.
Solution:
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Reduce the packaging speed to prevent overlap during material drop.
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Increase the discharge signal delay so sealing occurs after all material has entered the bag.
Q4: Why do some bags contain two portions of material or experience entrainment?
Explanation:
This usually happens when the packaging machine sends two consecutive request signals quickly (multi-interval mode), and the scale is in memory mode operating at high speed. The second signal is processed immediately, causing two discharges into one bag.
Solution:
Switch the detection mode to no-memory and use high-precision mode instead of high-speed mode. This prevents duplicate discharges and ensures stable operation.
Kenwei’s Commitment to Excellence
Kenwei designs every machine with precision, stability, and efficiency in mind. By understanding these common signal matching issues and applying the recommended solutions, you can optimize performance, minimize errors, and achieve seamless integration between combination weighers and packaging systems.
About Cooperation Process
Can Kenwei customize equipment to meet my specific needs?
Yes! We offer customized solutions for all of our machines. Our team will work closely with you to understand your specific requirements and create a solution that meets your needs in terms of size, functionality, speed, and other factors.
What information is needed to get a quote from Kenwei?
For us to provide an accurate quote, please provide the following details:
Type of machinery you are interested in (e.g., multi-head weighers, metal detectors, etc.)
Specifications and customization requirements (e.g., capacity, speed, size, etc.)
Your intended application and industry
Quantity of machines required
Delivery location
About After Sales Support
How do I claim warranty service?
To claim warranty service, please contact our customer support team with your machine’s product code and a description of the issue. If applicable, we may request photos or videos of the issue to facilitate troubleshooting.
About Solution suggestions
What are Kenwei’s primary solutions for industrial weighing and packaging?
Kenwei provides comprehensive solutions for automated weighing and packaging, including multi-head weighers, linear weighers, check weighers, metal detectors, and packing machines. These solutions are tailored to improve speed, accuracy, and efficiency in various industries such as food, pharmaceuticals, and chemicals.
About Product choice
How do I choose the right product for my business?
Choosing the right machine depends on several factors:
Product Type: Different machines are suited for different products (e.g., powder, granules, etc.).
Production Capacity: Consider the volume of products you need to process and the speed requirements.
Customization: If you have specific needs, such as the need for unique features or sizes, we offer customization options.
The standard no-spring combination scale features a patented spring-free hopper design, making it ideal for weighing a variety of products such as melon seeds, peanuts, nuts, almonds, grapes, candies, pistachios, potato chips, shrimp chips, and more. The double-support feeding tray is easily adjustable, while the feeding hopper is designed for easy disassembly, ensuring convenience and cleanliness. With a maximum weighing speed of up to 120 bags per minute, the 14-head standard no-spring combination scale is an economical, versatile, and cost-effective solution.
The Standard Multihead Weigher features a high-speed, spring-free hopper with a new aluminum shell design, ensuring stable and fast weighing performance. The integrative welding of the mouthpiece case and middle seat enhances the overall machine strength. Ideal for weighing granular products like melon seeds, peanuts, nuts, almonds, raisins, candies, and pistachios, this 14-head multihead weigher offers hopper options of 1.6L and 2L. With a maximum weighing speed of 120 packs per minute, it delivers rapid and accurate results for high-volume operations.
The Kenwei JW-B26 Single Multihead Weigher Mixing and Packaging System offers fully automated operation, completing feeding, weighing, filling, date printing, and product output with high accuracy and speed. Ideal for granules, slices, irregular shapes, and mixed products like candy, nuts, snacks, pet food, and even small hardware. Its versatility and precision make it a perfect solution for diverse packaging needs.
The JW-B4 Combined Multihead Weighing and Packaging Machine with Z Conveyor is a compact, fully automatic solution ideal for packing snacks, nuts, candies, pet food, frozen products, hardware, and more. It integrates feeding, weighing, filling, sealing, and labeling with high precision and speed. Suitable for a wide range of materials, it’s perfect for space-limited production lines.
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