A fluid delivery system comprises a motor that is configured to provide rotational motion to a rotary component. The fluid delivery system also comprises an alignment mechanism. The alignment mechanism comprises a first roller that engages a pin at a first end, and a second roller that engages the pin at a second end. The alignment mechanism also includes a coupler that is configured to couple the rotary component to a reciprocating component. Additionally, the alignment mechanism comprises a first alignment cavity that is configured to receive the first roller and a second alignment, and a second cavity that is configured to receive the second roller to align reciprocating motion of the reciprocating component.