text: <s>[INST] Ultra 3000 homing problem I'm using Ultra 3000i to control a motor bewteen normal count positions 0 and 100000. I have a homing sensor at position 0 and a negative overtravel sensor at position -10000. During a normal homing sequence, the motor will go backwards till it meets the homing sensor, stop and go forward 1000 counts, which is position zero. If the homing sensor is out of order, the homing sequence will cause the motor to pass the homing sensor and move to the negative overtravel sensor. Now comes the problem: Here the motor will for no particular reason change direction and go forward until someone stops it. So activating a negative overtravel while homing seems to make the motor do a movement I didn't tell it to. Any suggestions anyone? Thanks, Tommy. [/INST] Try to take a look to the following technote: Aid 47722 There are all the cases of Homing and overtravel, and your situations seems to occur sometimes as a known behavior... Hope this helps... - fuzzy logic \\n </s>