Learning method for plug-in depth

A learning method for plug-in depth, applicable in a plug-in device, wherein the plug-in device comprises a platform and a robot arm connected to each other, the platform comprises a feeder device and a first visual device disposed on the platform, and the robot arm comprises a second visual device, the learning method comprising steps of:

• (a) utilizing the robot arm to take an electronic component provided by the feeder device, wherein the electronic component comprises a body and a plurality of pins;
• (b) utilizing the first visual device to identify a pin distance between the plurality of pins of the electronic component;
• (c) utilizing the second visual device to identify a hole distance between a plurality of holes on a substrate;
• (d) inserting the plurality of pins of the electronic component into the corresponding plurality of holes with a predetermined depth according to the pin distance and the hole distance;
• (e) determining whether the plurality of pins of the electronic component are inserted into the plurality of holes of the substrate successfully, performing a step (f) when the determination result is satisfied, and performing a step (g) when the determination result is not satisfied;
• (f) recording the predetermined depth and performing the step (a) again;
• (g) calibrating the predetermined depth and performing the step (a) again;
• and
• (h) completing the learning of the plug-in depth after the step (f) is performed multiple times successively.