This application discloses a method for detecting the
repeatability of a quick-change device, comprising: setting at least three non-collinear measurement points on both the
robot side and the tool side, and
pairing them one-to-one; measuring the first spatial coordinates of each point using a
laser tracker in the locked state, using the
laser tracker's measurement coordinate
system as a preset rectangular coordinate
system, and calculating the first relative
spatial relationship between each
pairing point as a reference relative relationship; executing at least one disengagement-engagement cycle, keeping the
robot's posture unchanged after each engagement and lock, and measuring the second spatial coordinates of each point again to calculate the second relative
spatial relationship in the current state; comparing the second relative
spatial relationship with the reference relative relationship to obtain the relative deviation, which is the
repeatability deviation of the quick-change device itself after eliminating the
robot's own positioning error; and evaluating the
repeatability based on the relative deviation. This application can effectively separate the quick-change device's own error from the robot's own error, and has high measurement accuracy and is easy to operate.