We recommend re-teaching the lens to the FocusPLUS PRO by following the steps described in the following Lens Teaching video:
Since infinity lenses do not have hard stops at the macro and infinity points, we recommend manually stopping the Focus Ring from going past the macro and infinity points during the teaching process.
To stop Focus Ring, squeeze the rotating gear and the focus ring together with a small amount of force so that the gears stop turning at those points. The FocusPLUS PRO should then work the same way as it would when using the Cine lenses with built-in hard stops by acting as a hard stop yourself. This will not hurt the motor of the FocusPLUS PRO.
Measuring and adding as many focus distances as possible will greatly improve the follow focus on a target.
If you still need to fine-tune the focus, then please follow the steps given in the video below which demonstrates a few optimization steps that can help: