Yes. A practical approach is to combine a visual alignment aid with fine camera positioning.

Useful methods suggested:

• Illuminate each face of the plate with different colors (for example, red on one side and green on the other). When the camera is truly edge-on, neither face should be visible, so the color cast disappears. If one color dominates, move the camera in that direction.
• A backlight or flashlight behind the plate may also help by making the edge/shadow easier to center.
• Use macro focusing rails for precise left/right and forward/back adjustment. Set the camera angle first, lock it down, then use the rails for repeatable positioning.
• A longer focal length lets you work from farther away, which makes small angular errors less critical and alignment easier.

So the systematic setup is: mount the camera securely, roughly align it parallel to the plate, use colored side-lighting or backlighting as an indicator, then fine-tune with a focusing rail. Once you find the correct angle, lock the camera and reuse that setup.