When choosing a CNC oscillating knife cutter, if you mainly use it to cut fabric and leather and want to further improve production efficiency, there are two ways to achieve this: multi-layer cutting and adopting automatic feeding.
A feeding rack and an automatic deviation correction rack paired with an automatic feeding table form a complete automatic feeding system. Its greatest value is that it multiplies the production efficiency of CNC oscillating knife cutting machines.
Why Are Many Users Paying Attention to the Automatic Feeding Function of CNC Oscillating Knife Cutting Machines?
What Problems Exist in Manual Feeding in Actual Production?
Without an automatic feeding system, most CNC oscillating knife cutters rely on manual labor for feeding and adjustment, which brings a series of problems in actual production:
1. Frequent shutdowns for feeding, high proportion of non-cutting time
After each cutting cycle, the machine needs to be shut down for material pulling and repositioning. According to lean manufacturing research in the manufacturing industry, manual loading and unloading usually account for 30%–45% of the total processing time.
For example, on a 2.5-meter table, manual material laying, smoothing and alignment usually take 3-5 minutes. If the cutting time is also 5 minutes, it means the machine is idle 50% of the time. (Data reference: Lean Manufacturing studies on machine utilization, https://www.sciencedirect.com)
2. Limited material length, unable to perform continuous cutting
For roll materials such as leather, fabric and non-woven fabric, manual feeding can only cut a limited length. For example, if you need to cut 20 meters of fabric, without an automatic feeding system, you can only cut it in sections, and you have to shut down the machine and reload material for each section, making continuous cutting impossible.
3. Manual material pulling causes material skew and poor cutting consistency
Manual pulling of long rolls or multiple rolls is not only labor-intensive and inefficient, but also likely to cause material skew. In long-distance cutting, such tiny deviations will be continuously amplified, eventually leading to inaccurate finished product dimensions and even scrapping in more serious cases.
Which Production Scenarios Are Easily Affected by Feeding Efficiency?
Large-format materials: Such as roll materials like leather, fabric, non-woven fabric and floor mats.
Frequent switching of small-batch and multi-order production: Requiring quick material change to adapt to different orders.
Multi-layer cutting: The garment industry often needs to cut 10-20 layers of fabric at a time, and manual layering greatly affects operation efficiency.
Orders requiring long-term continuous operation: Such as large-batch urgent orders or rush orders that need quick delivery.
What Is the Core Value of the Automatic Feeding System in CNC Oscillating Knife Cutting?
Reduce Non-Cutting Time and Improve Overall Efficiency
The automatic feeding system only requires one-time feeding to realize continuous cutting of flexible materials, without frequent manual intervention and reducing downtime. Therefore, the greatest value of the automatic feeding system is not to make the machine cut faster, but to reduce its downtime.
Studies have shown that in flexible material cutting, after introducing an automatic feeding system, the effective cutting time of the equipment can be increased by 20% – 40%. (Reference: Automation in Cutting Processes, Springer, https://link.springer.com)
How Does the Automatic Feeding System Change the “Production Rhythm”?
From “cut one section, stop once” to continuous processing: Combined with “window cutting” technology, the machine can seamlessly connect the cutting path of the previous section.
Easier to realize standardized production processes: After setting the parameters once, the machine can complete all cutting tasks according to instructions, reducing the uncertainty of manual intervention in the cutting process, standardizing the production process and greatly reducing the reliance on skilled workers.
Automatic Feeding System ≠ Just an Automatic Feeding Table
What Does a Complete Automatic Feeding System Usually Include?
Automatic feeding table: Responsible for material pulling and cutting.
Feeding rack: Responsible for material hanging and supply.
Automatic deviation correction rack: Responsible for preventing material deviation and ensuring feeding precision (optional).
Zoned vacuum adsorption control: An automatic vacuum adsorption system to ensure the material is firmly fixed.
Why Does “Only Buying a Machine with an Automatic Feeding Table” Often Have Limited Effects?
Without a feeding rack and an automatic deviation correction rack, the material unwinding is unstable, and long material cutting is still prone to deviation. Although the table can move, the material cannot be fed in or is fed crookedly, which still requires frequent manual intervention.
Therefore, if you only buy a machine with an automatic feeding table, the length of material that can be cut at one time is limited. It only saves the step of manual feeding and cannot meet the needs of long roll material and multi-layer cutting.
The Practical Role of Feeding Racks in CNC Oscillating Knife Cutting
What Traditional Feeding Problems Do Feeding Racks Solve?
Support placing multiple rolls of material at the same time: The feeding rack is made of high-strength steel frames, usually designed with multi-layer crossbars and can hold 6-8 rolls of material at the same time.
Smoother material unwinding, less wrinkling: Roll materials are unwound through rollers, which is flatter than manual direct pulling and reduces wrinkling.
More stable feeding speed, suitable for continuous cutting: If you often need to switch fabrics of different colors and materials (e.g., cutting red fabric in the morning and blue fabric in the afternoon), you can hang them all on the rack in advance.
Material change only requires pulling down the corresponding roll without carrying heavy objects, greatly shortening the material change time and providing a continuous and stable material supply for the automatic feeding table.
How Do Feeding Racks Help with Multi-Layer Cutting?
Synchronous unwinding of multiple rolls for easy layering: For air-permeable materials such as denim and non-woven fabric, the oscillating knife can cut 10-20 layers at a time. A multi-layer feeding rack can feed multiple rolls of fabric into the machine in a stack, increasing the output of a single cutting by 10 times.
Reduce manual alignment time and ensure cutting precision: Manual alignment is time-consuming and labor-intensive, and a multi-layer feeding rack can align the materials at one time, improving the consistency and repeatability of multi-layer cutting.
Studies show that in multi-layer flexible material cutting, stable feeding can reduce interlayer error by more than 15%. (Reference: Multi-layer Cutting Accuracy Study, Elsevier, https://www.elsevier.com)
Which Materials Are More Suitable for Use with Feeding Racks?
Flexible rolls: Leather, PU, denim, cotton and linen fabric.
Industrial materials: Non-woven fabric, composite flexible materials, prepreg.
The Key Role of Automatic Alignment Bracket in the Automatic Feeding System
Feeding racks solve the problems of effective multi-layer cutting and continuous cutting, while automatic deviation correction racks perfectly solve the problem of cutting precision.
Why Is Material Prone to Deviation During Automatic Feeding?
Uneven edges of the roll itself: The roll is not wound completely straight, showing a tower-shaped or dish-shaped appearance.
Long-distance feeding errors are continuously amplified: In long-distance conveying (e.g., 50 meters), tiny angular deviations will be continuously amplified (the longer the feeding distance, the greater the cumulative error).
How Does an Automatic Deviation Correction Rack Work?
Real-time monitoring of material edge position: Both sides of the rack are equipped with high-sensitivity infrared or photoelectric sensors to monitor the position of the material edge in real time.
Automatic adjustment of feeding direction: For example, once the sensor detects that the material is deviated 1mm to the left, the control system will immediately instruct the bottom deviation correction motor to act, driving the entire feeding rack to fine-tune to the right or adjust the roller angle to “push” the material back on track. Deviation is continuously corrected during the entire cutting process.
The Impact of Automatic Deviation Correction on Cutting Precision and Yield Rate
Prevent overall pattern deviation: Ensure the material always moves straight forward along the Y-axis with the automatic feeding table.
Improve the consistency of large-format cutting: No matter how long the material to be cut is, the cutting precision can always be kept consistent, reducing the scrap rate and rework probability.
The Practical Value of the Automatic Feeding System for Different Users
Significance for Small Factories and Entrepreneurs
Replace manual labor with equipment, reduce the demand for workers (e.g., one person can operate multiple machines), lower the reliance on skilled workers and increase output per unit time.
Significance for Users with Medium and Large Batch Production
Support long-term continuous operation, improve delivery stability, reduce the production cost per unit product, increase production efficiency and gain more competitiveness in the same industry.
When Is an Automatic Feeding System Not Necessary?
Mainly cutting short and small-sized materials: Such as cutting boards within 1 meter, like corrugated cardboard, various gaskets, EVA, EPE and EPS.
Extremely low output, mainly for prototyping: Only cutting a few samples a day, manual feeding and material change can meet the demand without a machine with an automatic feeding system.
Space constraints: An automatic feeding system usually requires 2-3 meters of space reserved at the front and back of the machine to place the racks. If your site area is limited, you cannot choose to match a feeding rack or an automatic deviation correction rack.
For the actual cutting application, whether to choose an automatic feeding table cutter or a fixed table cutter, please also read: Automatic vs Fixed Table on CNC Oscillating Knife Cutter
How to Choose Between a Multi-Layer Feeding Rack and an Automatic Deviation Correction Rack?
In These Cases, It Is Recommended to Choose a “Multi-Layer Feeding Rack”
Limited budget: The multi-layer feeding rack has a simple structure and a relatively low price.
Industry characteristics: Engaged in garment and home textile processing, needing to cut multiple layers of fabric at a time to increase output.
Material characteristics: The material itself has a high fault tolerance, and slight deviation does not affect use (e.g., filling cotton, non-woven lining).
In These Cases, It Is Recommended to Choose an “Automatic Deviation Correction System”
High-value materials: Such as cutting genuine leather, carbon fiber prepreg or expensive advertising film.
Extra-long patterns: Often needing to cut continuous patterns over 5 meters long (e.g., large inflatable castles, truck tarpaulins).
Printed contour following: Cooperating with a CCD vision system for printed alignment cutting. The deviation correction system can ensure the printed image is always in the best position of the camera’s field of view.
Practical Suggestions for Purchasing Automatic Feeding Related Configurations
What Points to Pay Attention to When Selecting a Feeding Rack?
Number of roll materials supported: Whether it can hold 4, 6 or 8 rolls.
Load-bearing capacity: Whether it can hang your heavy rolls (e.g., 200kg leather).
Structural stability: Whether the feeding rack is stable when the machine pulls materials during multi-layer feeding.
Is It Worth Configuring an Automatic Deviation Correction Rack?
If you mainly cut expensive rolls such as genuine leather and carbon fiber prepreg, it is necessary to choose and match an automatic deviation correction rack.
FAQs
How much deviation can the automatic deviation correction system correct?
Usually within ±50mm. The deviation correction system is a fine-tuning system, which cannot correct any degree of material deviation. If the roll itself is wound like a “cone” (loose on one side and tight on the other with extreme deviation), or placed too crookedly initially, the deviation correction system cannot complete the correction.
Suggestion: Try to ensure the material is centered and straight during initial feeding.
Can all roll materials use the automatic feeding system?
Most can, but there are exceptions. The automatic feeding system is more suitable for flexible rolls such as fabric, leather, paper and film. It is not suitable for rolls with too high rigidity (e.g., hard PET rolls with a thickness > 2mm), which may warp when placed on the feeding rack and make it difficult for the machine to pull materials. It is also not suitable for extremely sticky materials (e.g., adhesive film without backing paper), which may stick to the feeding rollers.
How much does an automatic deviation correction system cost approximately?
It depends on the width of your machine. If your machine is a standard 1600×2500mm model, a set of automatic deviation correction system is about 900 US dollars. If you customize a larger machine, the corresponding price will be higher. You can communicate the price with the merchant in advance before customization.
Is the felt belt of the automatic feeding table easy to damage?
Its service life is slightly shorter than that of the fixed table felt. As it is an endless circular belt, the replacement cost is about half more than that of the fixed table felt. Since the felt is subject to rolling friction at all times, when using automatic feeding, be sure to set the proper over-cut depth (do not cut too deep), and clean the table debris regularly to prevent it from getting into the rollers and scratching the belt.
Will the bottom layer of fabric shift due to feeding when cutting multi-layer fabric?
Not at all. Our CNC oscillating knife cutting machines are all equipped with a 12KW maximum vacuum adsorption system. When cutting fabric, a layer of film can be covered on the fabric to fix the material firmly, preventing displacement due to feeding and ensuring that the multi-layer fabric enters the cutting area in close contact.
Will the effect be much worse with only an automatic feeding table and no feeding rack?
It depends on the specific situation. If you want to realize multi-layer cutting, it is easier to achieve with a feeding rack than without it.
Can a multi-layer feeding rack and automatic deviation correction be used at the same time?
Absolutely. Their functions do not conflict. The feeding rack is responsible for continuous material supply, and the automatic deviation correction is responsible for ensuring the alignment precision of multi-layer long-distance cutting.
When placing them, the automatic deviation correction rack can be placed in front of the feeding rack, so that the material pulled down from the feeding rack can pass through the automatic deviation correction rack. They cooperate with each other to ensure both continuous material supply and cutting precision.
Is the automatic feeding system suitable for prototyping and small-batch production?
If the production is mainly based on short and small samples, the advantages of automatic feeding are not obvious. But once it involves repeat orders, long materials or multi-layer cutting, even for small batches, automatic feeding can significantly reduce operation time and labor intensity.
Will automatic feeding limit the flexibility of material types?
No. Automatic feeding is mainly for rolls or continuously unwound flexible materials such as leather, fabric and non-woven fabric. For sheet or special-shaped materials, the automatic feeding system can be disabled, and the materials can be directly placed on the table manually. The two do not conflict. The CNC oscillating knife cutters of truster cnc support flexible switching between automatic feeding and manual feeding.
Is the automatic feeding system suitable for production scenarios with frequent material changes?
Yes. Materials of different batches and specifications can be placed on the feeding rack at the same time, and only the material to be cut needs to be pulled into the table each time, which can reduce material change time. Compared with repeated manual loading and alignment, the automatic feeding system is more efficient in multi-variety switching, especially suitable for the production mode of “small batches and multiple orders”.
References and Information Sources
Groover, M. P. (2020). Automation, Production Systems, and Computer-Integrated Manufacturing. Pearson Education.
Altintas, Y. (2012). Manufacturing Automation: Metal Cutting Mechanics, Machine Tool Vibrations, and CNC Design. Cambridge University Press.
SpringerLink. (n.d.). Flexible Material Handling and Cutting Systems. https://link.springer.com
ScienceDirect. (n.d.). Lean Manufacturing and Machine Utilization Studies. https://www.sciencedirect.com
