How do we differentiate between robots? Is a robot with hobby servos the same as a 30000 dollar industrial robot? Of course not. Industrial robots have stiffer parts, motors are more precise, motion algorithms and motor controllers are advanced... All this and more dictates how usable the robot will be. Some of the aspects that describe that robot usability are accuracy, repeatability, payload, speed, reach, safety... In the field of robotics, there is often confusion between the definitions of repeatability and accuracy when discussing these concepts. Here we will only discuss robot accuracy and repeatability.

1. Accuracy: accuracy refers to the ability of a robotic arm to consistently reach a specific target point accurately. It measures how closely the robot can position its end effector (such as a tool or gripper) to a desired location in space. Roughly speaking accuracy is the error between the requested task and the task that the robot did. What affects robot precision: Mechanical design, backlash, encoder feedback, control software, calibration, wear, payload... 

1. Repeatability: Repeatability, on the other hand, refers to the robot's ability to consistently return to a programmed position or target point. It assesses the robot's capability to repeatedly perform the same motion or task and consistently reach the same position each time it executes the movement. Repeatability takes into account variations that might occur due to factors like mechanical play, backlash, or environmental conditions. In broad terms, the repeatability of a robot might is the ability to achieve repetition of the same task.

This clip is just a short demonstration of PAROL6 repeatability and its abilities. In the future, more tests will be done with load and more complex arm movements to see what real repeatability is! But nevertheless, this Is a cool example of what this arm is capable of and what to expect of it!

 Also, keep in mind that this is first prototype that had at least 7 months of extensive testing, crashing, overheating, and every bad thing imaginable that can happen to a robot.