text: <s>[INST] Ultra3K driving a LDC-C100 series Linear motor (460VAC) Summary: Motor moves only over short distance and reaches peak currentHi All, So we have this custom motor from Rockwell-LDC-C100series which is being controlled by the Ultra3K drive. The encoder we use has a 20um optical pitch with 1um resolution. The motor is mounted vertical ( we do have brakes, latches, and straps to avoid a free fall incase motor loses power etc) The total moving mass is about 50kg.The issue we are seeing is that, we are unable to travel more than 25mm ( even with low speeds of 5mm/sec) where in the current reaches its peak value (68A) and servo faults. We have checked and verified the following-U, V, W phase wiring ( using commutation test available in ultraware as well as manually trying all 6 combinations of U, V, W phases;) Hall effect sensor -S1,S2,S3 wiring ( when moving up-S1 leads S2 leads S3 and conversely lags when moving down, confirmed with physical scope as well as scope option in ultraware), encoder is reading correctly in the full length of travel. There are no mechanical parts in its path that may be causing this. Can anyone think of anything we may be missing here ? Thanks in advance. [/INST] Is this a brand new application you're trying to commission, or an existing installation that suddenly stopped working properly? \\n </s>