According to the question raised by

According to the question raised by your company, the inventory (same as the product shipped by your company) tested by our engineering department did not find any response from your company. Springrc has never had such a serious problem since its operation, and all the products shipped by our company are 100% inspected. It's incredible to have such a major defect problem! 1. According to the video and pictures provided by your company, the engineering department of our company simulates the problem to reproduce the experiment, and found that when the resistance is too large, it will cause the servo to not receive the signal and cause it to not work. Please refer to 1k-2k resistance, output signal 1K-10K (please see the picture) 2. Please return it first. The 220pcs servo that you think is not working at all will be analyzed and tested by our company. 3. Please provide us with a 10pcs servo confirmed by your company as a good product for comparison, analysis and testing by our company. Please cooperate with your company for the above requirements, thank you! The reference picture is as follows;