| 摘要 |
<p>A rotating stand includes a turner casing base and a turner casing top rotatably coupled with the turner casing base. A motor drive assembly is coupled with the turner casing base, wherein the motor drive assembly is configured to rotate the turner casing top relative to the turner casing base. A motor controller is coupled with the turner casing base, wherein the motor controller is configured to cause the motor drive assembly to rotate the turner casing top relative to the turner casing base using alternating clockwise and counter-clockwise rotational motions.</p> |
