Sewing Machine Motor AC110V Industrial Brushless Servo Motor with Controller and Foot Switch Reversible (750W)

We have several servo motors. They are godsend for making old clutch style machines more accessible to modern crafters. This unit works - sort of. After following the less than stellar instructions, which are riddled with errors and hard to follow, we got the direction set. The speed function works reliably. Unfortunately, the display reverts to error mode after each use. Since we own if several servo motors, we don't accept sole responsibility for the confusion. We are relatively confident we'll get it sorted. This otherwise appears a well made servo motor.