With TwinSpin it is possible to make simple designs for the positioning fixtures for welding automation technology, laser and plasma cutting. TwinSpin can replace the currently used precision rotary systems with high load ability. These old solutions are generally expensive to manufacture and to service. They are also usually much large in size then TwinSpin solution.
Generally, high precision reduction gears TwinSpin are used in these areas:
Applications of high precision reduction gears TwinSpin in Automation and Service Robotics area:
- Rotary Tables
Use of TwinSpin in rotary tables can provide the customer with high stiffness and load capability of the output flange, compact design and high positioning and repeatability precision. This type of rotary positioning equipment is generally used in automated manufacturing and/or assembly processes, where the requirements are for high repeatability. Design of rotary tables with TwinSpin is substantially simplified which also decreases the cost of the system. Typical examples of application are in the food and glass industry, packing and filling machines, and general assembly systems.
- Bending Machines
In an automated manufacturing line for furniture boards, the plastic edges have to be pressed with a roller to the edges of the board. These edges can have any contour. Motor connection consists of a rigid adaptor shaft with clamping device, and a servo motor connection flange. The supreme radial-axila capacity of the output shaft bearings in a combination with the high reliability of the reduction mechanism is the main reason for using TwinSpin reducer for this customer.
- Tool Changers
TwinSpin reducers are generally applied in CNC machining centres. Some of the common applications in these types of machines are integration inside the drive systems for tool changers, manipulators, work pieces placement, and inside round grinding technology. The advantages are the compact size of the reducer and the high position accuracy. Another advantage is the load capacity of TwinSpin reducers, this allows the system to carry a large number of tools on the tool changer.
- Grinding Machines
TwinSpin reducers can also be used inside the spindle drive unit. It is not the most common type of application due to the high input speeds, but this can demonstrate the capabilities of TwinSpin reducers. In the case the low vibrations, high torsional stiffness and high tilting rigidity of TwinSpin reducers are benefits that allowed the manufacturer to save space, time, and lower the manufacturing costs for the machines. Other advantages that the customer had realised with the help of the TwinSpin are high precision and low transmission error. All of these advantages had a positive influence on the quality of the grinded surface of the work piece.
- Milling Machines
This is a unique application which integrates TwinSpin reducer with a precision sensor at the output side of the reducer. This solution is used for precise angular positioning of the milling spindle. As such, each mechanical reducer has a certain transmission error. For TwinSpin reducers the value for this error is very low. However, there are applications where we have to find a method to obtain even smaller transmission errors. Normally the angular position of rotary device is controlled by high.resolution sensor at the motor shaft. This has advantage that the revolution of the encoder is multiplied by the reduction ratio of the reducer. However, this leaves the mechanical transmission error of the reducer itself.
In order to reduce this remaining error, we can install a high precision sensor at the output side of TwinSpin reducer. Provided that the control unit for the servomotor has the appropriate capacity, transmission accuracy can be improved to +/- 12 arc seconds and repeatability can be achieved to +/-1,3 arc seconds. This means that at the radius of 1000 mm there is repeatability of +/- 9 mm. The output flange of the reducer carries an additional disc, which is encoded at its outer diameter so the two inductive sensors can monitor an angular signal. The whole arrangement is sealed so that contamination cannot lead to errors.