4th axis cnc rotary table

Types of 4th axis CNC rotary tables

As an addition to a standard CNC machine, the 4th axis CNC rotary table allows the machining of a workpiece from multiple angles without repositioning it. These can be categorized into the following:

• Direct drive: The direct drive rotary table is powered by a direct drive motor, also known as coreless or slotless DC motors. They're known for their high accuracy, low backlash, and compact size. Achieving accurate machining of the workpiece from different angles becomes easy with the direct drive rotary table. They have few gears, which means less wear and tear over time. This also makes maintenance easier. They are popular choices in 4th axis CNC machines for their precision and low count of moving parts. Achieving a high level of precision in machining becomes easy with the direct drive rotary table.
• Belt Drive: Rotary tables that use belt drive systems are known for being affordable. The table is turned by a motor through a belt. High speed and torque are among the benefits of belt drive rotary tables. There may, however, be some issues with accuracy because they have more gears than the direct drive. This makes backlash a common problem. Despite the accuracy issues, belt drive rotary tables are commonly used. Many people opt for them because they are cheaper than the direct drive option.
• Hollow Rotary Tables: The hollow rotary table has a hole or opening in the middle. This feature makes it possible to pass longer workpieces through the middle. The hollow rotary table eliminates the need for additional setups by allowing for the machining of complex geometries with ease.
• Vertical CNC rotary table: The vertical CNC rotary table allows the vertical position of workpieces and tools. Workpieces with slots, keyways, and longer shaft components get machined easier with the vertical position of the workpieces. It is possible to combine more machining operations and improve efficiency when using a vertical CNC rotary table together with a horizontal one.
• Horizontal CNC rotary table: The horizontal CNC rotary table allows the horizontal position of workpieces and tools. It is widely utilized for machining parts such as discs, bushings, and rings. The horizontal CNC rotary table provides flexibility to the machines and allows for highly accurate rotations in horizontal planes.
• Tilting CNC rotary table: The tilting CNC rotary table has the ability to tilt. This feature improves its machining capability in multiple directions with accuracy and precision. The table can be tilted to adjust the angle to a certain position for more efficiency when performing machining operations. It also helps to improve the workflow.

Maintanance

Maintaining a 4th axis CNC rotary table properly ensures its accuracy, longevity, and optimal performance. While maintenance may vary according to the type and model of the rotary tables, here are some general maintenance tips that apply to most 4th axis rotary tables:

• Clean the Surface Regularly:

  Debris, dust, and dirt can get accumulated on the workpiece and table surfaces. Regular cleaning ensures the removal of such contaminants, preventing the damage of the rotary table bearings and precision surfaces. Use a lint-free cloth and mild solvent to clean the surface of the 4th axis CNC rotary table. Make sure to avoid the use of harsh chemicals that can damage the surface coating of the table.

• Lubrication:

  Apply lubrication to the moving parts of the rotary axis table, such as the bearings and gears. It helps to minimize wear and tear while ensuring smooth operation. Always refer to the manufacturer's guidelines and use the recommended lubricants.

• Regular Inspection:

  Check the 4th axis CNC rotary table regularly for any signs of damage or excessive wear. Pay attention to the precision surfaces, bearings, and electronic components to identify and fix problems early and prevent further damage.

• Optimize Workholding Fixtures:

  Using improper workholding fixtures can increase the risk of rotary table damage as they might not securely hold the workpiece. Improperly held workpieces might slip or move during the machining process, exerting excess pressure and force on the rotary table. Choose the right and optimized workholding solution for each application. They help to ensure proper workpiece clamping and alignment on the rotary table, thereby reducing the risk of damage to the table.

Scenarios

4th axis CNC rotary tables are used in various industries for different applications, including the following:

• Architecture: 4th axis CNC machines assist architects and builders make scale models of topography, zoning, and landscaping. Such a machine can precisely cut and engrave materials like foam, MDF, plywood, and acrylic. With these materials, the machine can easily be able to create architect models that are accurate and give a glimpse of actual buildings, as well as urban designs.
• Aerospace and Aviation Industry: 4th axis CNC machines help the aerospace and aviation industries design and manufacture components for the industry with precision. Components like blades for turbines, fuselage, brackets, and aircraft frames, to name a few, are designed and manufactured using 4th axis CNC machines. Such components need to be highly accurate, and as such, only a machine can assist in effectively and efficiently crafting them without errors.
• Automobile Industry: One may already know that almost all industries use machines as an integral part of their production and manufacturing process. Cars' intricate and curved parts, such as wheel hubs, camshafts, crankshafts, and turbo housings, are of the highest quality and perfectly made with 4th CNC machine assistance. Cutting, engraving, and aligning techniques are made more accessible with this machine.
• Signmaking: Businesses are constantly looking for ways to make their branding more profound and more substantial. A well-thought-out plan with excellent signage can go a long way in attracting a greater number of customers. CNC machines with a 4th axis are, of course, used by signmaking companies to make complex and curving signs more accessible. Incorporated into such a rotary machine can be a laser engraving tool that will go a long way in providing accurate, detailed, and high-precision sign designs.
• Prototyping: When time is of the essence, and an idea for a new product must be made quickly to get it onto the market, 4th axis CNC machines come to the designer's rescue. Quickly and precisely create a prototype for some new product idea.

How to choose 4th axis CNC rotary tables

Both the tafel rotative CNC 4th axis and the 4th axis laser rotary are important accessories for CNC machines. They all have their specific applications and benefits. When choosing one, it is important to consider the following crucial factors.

• Workpiece Compatibility

  The primary goal of a rotary axis is to work with a particular workpiece. As such, it is necessary to find out if the rotary table can adequately support the size and weight of the intended workpiece. Worry less about compatibility if the workpiece can be easily adjusted and mounted.

• Precision and Accuracy

  The main reason for using the rotary table is to increase the accuracy and precision of workpieces. Therefore, it is important to choose a rotary table with a high level of accuracy—typically, an axial table with a resolution of 0.01 or better.

• Integration and Compatibility

  A rotary table would typically work as an accessory to a CNC machine. As such, the table should integrate and be compatible with the existing CNC controller and software. This seamless integration will ensure that the rotary axis is adequately controlled alongside other CNC axes.

• Transmission System

  These rotary axes work via different transmission systems. Helical gears are among the most commonly used, as they provide smooth motion and low backlash. Other transmission systems may include belt drives and harmonic drives. Choose a transmission system that will provide adequate precision for the project at hand.

• Build Quality and Sturdiness

  Not all CNC tasks require the same level of robustness. A sturdy, well-built rotary axis will properly support delicate workpieces. However, it is also important to realize that a heavy-duty rotary axis will likely provide long-term service.

4th axis cnc rotary table Q & A

Q1: What are the two main types of CNC rotary tables?

A1: The two main types of CNC rotary tables are indexers and continuous rotation tables. Indexers typically have a limited range of motion (for example, 0-360) and rotate in increments of 90, 180, or any other preset value. They pause at each designated point. On the other hand, continuous rotary tables offer uninterrupted 360-degree rotation, allowing for constant turning and continuous movement in both clockwise and counterclockwise directions.

Q2: What Are the Benefits of 4th Axis CNC Machining?

A2: Enhanced Automation, Simplified Assembly, Improved Accuracy and Precision, Higher Production Rate, Better Utilization, Reduced Tooling Cost.

Q3: What is the programming like for CNC 4th axis rotary tables?

A3: CNC 4th-axis rotary tables are typically programmed using G-code, the standard programming language for CNC machines. Depending on the type of table attached to the CNC machine, different commands may be used to program it.

Q4: Can all CNC machines use rotary tables?

A4: No, unfortunately, not all CNC machines can use rotary tables. Rotary tables are usually compatible with CNC milling machines and routers. However, compatibility can vary, so it's essential to check the specifications and requirements of both the rotary table and the CNC machine to ensure they can be used together. Additionally, rotary tables are primarily designed for CNC milled work. So, if the CNC machine in question is not a milling machine, it may not be able to use a rotary table. For example, rotary tables aren't typically suitable for a CNC laser machine.