text: <s>[INST] Virtual Torque Sensor Hello Good Morning, I was working on predictive maintenance for Kinetix 5700 servo drives using the add on feature virtual torque sensor for jams or mechanical system issues including gear tooth fracture or breakage in gearboxes, bearing damages, damaged coupling, damaged balls crews, and broken blades or wore blades in rotary knifes etc. There was an AOI developed by Rockwell to detect any disturbances in the profile. I am using the Torque estimate for the detection as said by the document. My question is I am doing a test on the Kinetix 5700 on a motion drive using a single axis & I configured for velocity loop. There is not much information about the use of AOI. For example, My test procedure is as follows. At First I wanted to record or save the good profile & then stop it then loosen the couplings so that the AOI will detect the disturbance based on the first profile. But I was not able to detect the disturbance. I am looking for some information on the AOI I am attaching the AOI_LoadConditionMonitoring_v2 pdf for the reference of the AOI. There is not much information on the knowledge base as well regarding the test procedure or about the AOI Thank you [/INST] Sai, Never seen this AOI before but the picture from the pdf graphical tells me what I need to know, During the yellow highlighted period, the monitored value is above min. and below max.. thus normal. At the end of the yellow highlight period, the monitored value dips below the min. value and this starts a timer If the monitor value remains low and the timer completes, it sets a Boolean to indicate a disturbance is detected. The trick is to have a measured value that can reliably indicate there is a problem. I'm guessing a loose connection might show up as a period of no torque, or high positioning error, or maybe non-linear response. but it might be too short to see or otherwise masked by the closed-loop algorithm. \\n </s>