High-precision control of parallel axes (gantry) with general-purpose servos.
With the increase in the size and precision of stages, a gantry structure and parallel axis drive mechanisms are required. If the center of the table is driven when operating the mechanism, the resistance in the driving direction will occur evenly on both sides. In contrast, if one side is driven due to the mechanism's configuration, twisting (yawing) of the table will inevitably occur. This yawing will lead to inaccuracies in the position of the workpiece on the table. Additionally, there may be cases where central driving is not possible due to the size of the table or structural constraints. In such cases, the key point is how to drive the table without yawing. The "dual-axis with identical commands" function is useful in such situations.
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■Mechanism of Same Command Dual Axes The parallel dual axes can be operated as a single axis. Physically, each axis is controlled and managed separately, so statuses and variables exist for each. However, when operating, it is possible to perform actions such as "automatic operation," "manual operation," and "return to origin" as if it were a single axis. Additionally, each axis can also be controlled independently. ■Advantages of Same Command Dual Axes - Achieves high precision (with an error of a few micrometers) driving for gantry-type machines! - Realizes precise and stable control of large tables! - By combining with other optional functions (pitch error, tangential control, diameter correction, etc.), a highly precise system can be achieved! - In the 64-axis version of the PC-based fine motion (RTMC64-M3/EC), multiple parallel axes can also be controlled within the same task. Example: Two sets of parallel axes Three or more parallel axes ■Precision of Same Command Dual Axes The error in the command for the dual axes is within the precision of one pulse. Disturbances caused by friction in the mechanism are resolved through the speed loop control of the servo amplifier. *With AC servos, disturbances can be corrected with control in the range of several tens of microseconds. By combining the functions of the servo amplifier, control with an error of a few micrometers against torque disturbances such as friction can be achieved.
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Techno has consistently developed and sold "motion controllers" for over 35 years since its founding. Our greatest mission is to enable the more flexible use of advanced NC technology. To achieve this, we have realized "the openness of NC technology," "downsizing (miniaturization and minimal hardware)," and "a wealth of precise motion functions." Thanks to this, our products are used in over 600 themes and tens of thousands of devices. *These include precision machining machines (cutting, grinding, polishing, milling, boring, discharge, laser, water jet, etc.), winding machines, unwinding machines, industrial robots, 3D printers, pipe benders, spring manufacturing, film rolls, inspection devices, and more. We believe that our products, technology, know-how, and experience will continue to contribute to customers aiming for world-class top-level equipment.
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