Direct Drive Rotary Table is one of the most common designs for small office and home office furniture designs. Direct drive rotary table rotates on two vertically positioned drums, which are attached directly to the table’s center post. This design has been used in office and other small business applications for decades due to its reliability and ease of use.
Direct drive rotary tables have the shaft driven by a motor very much like your car engine. The shaft is set up such that it can spin freely on the two axes. The tables offer very high rotary speeds and high acceleration/deceleration with low friction. However, the problem with direct-drive rotary tables is that the shaft can wear over time, or the caster wheels can become clogged with grease and dirt, resulting in poor performance and frequent need for maintenance. Direct-drive tables are also susceptible to overheat and burn out, with the possibility of complete failure.
Counter-rotary (or clockwise) rotary tables, on the other hand, have a counter-clockwise rotation. These rotary products are similar to Direct Drive Rotary Table. They have a single fixed drive unit, which rotates around a single axis. Unlike Direct Drive Rotary Table, counter-rotary tables have no shafts and therefore don’t suffer from wearing, grease build-up or burn out. However, counter-rotary tables offer only moderate power output and slow rotation speeds.
Rotary Clamp: A direct drive rotary table can have either a high-speed or a low-speed clutch. High-speed clutches are more reliable and also come with an anti-tip clutch for added security. However, they are a bit costlier than low-speed clutches and therefore not as common. A low-speed clutch is more common and widely used.
Worm gearboxes are another type of rotary table that use a single drum that has two or more cylinders rotating at the same time. These gears come in either semi-symmetrical or mixed mode, and some types are fitted with a worm wheel to counter varying power levels. The torque of these gears vary depending on the size and speed of the gear, and they do not have a full range of clutch torque.
These rotary tables have great advantage over their counterparts, as they allow the user to manipulate torque and speed far greater than conventional manuals without manual effort. Further, they consume much less power and provide higher torque and horsepower. Although, they are available in different sizes and speeds, selecting one depends on the application, and the manufacturer’s needs. Some examples of direct drive rotary tables are presented below.