The trouble with some of the china motors and drivers is that the instructions and support may not be very good. I suggest taking a look at eDealers Direct on ebay and look at his nema 23 packages. He sells the good Gecko drivers and good quality motors. You will pay a little more but get better products and better service. He (Vince) also has a youtube channel under corvetterguy50 you can reach him at. He is also on here as storm2313