I recently purchased from eBay a set of 3 CL57T Hybrid Stepper Motor Driver with Stepper Motors: They work, but did not seem to detect following error as a fault. After some fruitless searching and a clueless eBay seller, I tried the software - and there the answer is! UPDATE: For those of you asking: The model of CL57T which I have is: MS30A The software I used is available from: The page for the device is here: The exact download l ink for is here: (Note that for the Version MS10E series, they have different software, which I have not used: )