What Is a Direct Drive Rotary Table and How Does It Benefit me?

// Published 2021-08-31 by admin

Direct Drive Rotary Table

What Is a Direct Drive Rotary Table and How Does It Benefit me?

Direct drive rollers are becoming increasingly popular in the industry. The concept behind these rollers is based around the fact that they do not require mechanical components like the rollers in a typical rotary table. Instead, the drive rollers directly apply force to the material, which in turn applies a force to the frame. This makes them much less expensive to manufacture.

Most traditional rotary tables have two or more rollers, which require mechanical components such as worm gears, a roller cage assembly, and a shaft. Due to their mechanical components, there is always some amount of slop in the force application throughout the full range of the swing. The result is an undesirable amount of backslope for the operator and an undesired amount of ground loop speed for the table.

With direct drive rotary tables, there are no mechanical components to build. All of the drive units are contained within a steel tube, which is wrapped by fully machined aluminum spacer tubes. There is no need for a spring or any type of mechanical components. In fact, direct drive rotary tables offer zero backlash operations. That means no slop, which greatly reduces fatigue and eliminates fatigue kickback, which is a common problem with many drive applications.

Using direct drive rotary tables minimizes heat dissipation during operation, which will reduce vibrations, improve lubrication, and reduce heat buildup. This will also increase the life of the machinery over the lifetime of the machine. Because of its minimal friction and cooling requirements, direct drive rotary tables require less oiling than other rotary table construction techniques. Lubrication requirements are approximately half that of CNC rotary tables. This means you can operate your CNC equipment longer before requiring oiling, which saves money and increases productivity.

Another benefit of the zero-backlash design of a direct drive rotary table is that the feed roller is located inside the bearing. This eliminates the need to remove a bearing from the chuck to access the chuck end. This is called “umbilical routing”. The entire assembly is then enclosed in a high-speed urethane case. With this setup, the operator does not need to remove the table from the lathe except for changing spindle bolts.

For users of the CNC machines who prefer not to use an external motor, there are still benefits. For example, the spindle could be run continuously with no reduction in performance. The accuracy of the machine is also not affected by the presence of an independent motor. However, it is recommended that when an independent motor is added to a CNC machine, the software should be modified in order to provide for a correct torque for the new motor. torque specification should be set manually in this case.