My torch descends without stopping

Hello, I don’t know how to solve this problem, I searched a lot on the forum or video…
My arcdroid no longer senses the height of my torch which makes the mount go down without stopping until the cable comes out of the case completely and also comes completely to a stop until I hear the gears squeak, which is not good at all.
I tried to perform a calibration but the height of the torch is normally automated. However, I didn’t hit any value in the program and the cable moves well in the sheath and the sliding of the whole thing works perfectly. I don’t understand the problem. Thank you very much in advance for your help

Pictures of your arm and cables

In the end it only lasted a very short time and my problem is still there. However I have only had the machine for 2 weeks and I have only moved it from the garage to in the house.