Single-axis robot, also known as single-axis manipulator, electric sliding table, linear module, single-axis driver and so on. Single-axis robot can realize two-axis, three-axis and gantry combination through different combination styles, so multi-axis robot is also called rectangular coordinate robot.
Single-axis robots generally have two transmission modes, one is ball screw transmission, and the other is synchronous belt transmission. Both of them are guided by linear guide rails, and can realize positioning, load shifting and handling in different application fields with servo motors or stepping motors.
Ball screw drive: it has the characteristics of high positioning accuracy, low friction, high rigidity and strong load capacity. However, the length of the screw drive is limited and cannot be too long. When the ratio of the length to the diameter of the screw rod exceeds a certain value, the screw rod will be influenced by gravity and produce deflection. With the increase of deflection, it is easy to produce resonance when rotating, resulting in the screw rod breaking.
Synchronous belt drive: Synchronous belt drive has the characteristics of low noise, high speed and low cost. Synchronous belt has more price advantage in long-distance transmission. However, compared with the screw drive, the precision of the synchronous belt is not as high as that of the screw drive.
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