Free EIKI Projection Calculator — Calculate Screen Size & Throw Ratio

EIKI Projection Calculator: Troubleshoot Projection Distance & Alignment

When a projected image is too small, off-center, or distorted, the issue is often throw distance, lens shift, or keystone. The EIKI Projection Calculator helps you diagnose and fix those problems quickly. This guide shows common issues, how to use the calculator to find the right settings, and practical troubleshooting steps.

Common projection distance and alignment problems

• Image too small or too large: projector is too far/close for desired screen size.
• Image off-center or shifted: incorrect placement relative to screen center or lens shift not used.
• Keystone/distortion: projector angled vertically/horizontally or lens tilt causing trapezoidal image.
• Blurry edges or focus inconsistency: wrong throw distance or focus not set for that distance.
• Part of the image cut off: projector outside required throw range or aspect ratio mismatch.

Use the EIKI Projection Calculator (quick steps)

1. Identify the desired screen width or diagonal (use diagonal if you prefer).
2. Locate your projector model’s throw ratio (e.g., 1.5:1). If unknown, check the projector specs.
3. Enter screen width into the calculator and the throw ratio; the calculator returns the ideal throw distance range.
4. Compare the calculator’s recommended distance with your physical mounting point.
5. Adjust mount position, lens zoom, or select a different throw mode (if available) to match the recommended distance.

Practical alignment and setup checklist

• Measure screen width (accurately; width is required for throw calculations).
• Confirm throw ratio in the projector manual or spec sheet.
• Place projector at calculated distance from screen center; use tape marks or laser measure.
• Center projector horizontally to avoid horizontal keystone; use lens shift to fine-tune.
• Set vertical placement so lens height aligns with screen center (or use lens shift).
• Zoom, focus, and lens shift: use optical zoom before digital keystone; apply lens shift for centering, not keystone correction.
• Minimize keystone correction — digital correction reduces image quality; physically reposition first.
• Check aspect ratio and resolution on both projector and source device to avoid cropping.
• Lock mount and re-check after tightening to ensure alignment didn’t change.

Troubleshooting scenarios and fixes

• Image too small: confirm throw ratio and move projector closer or use zoom; verify calculator input units (inches vs. meters).
• Image off to one side: slide mount horizontally or use lens shift; if lens shift insufficient, remount.
• Trapezoid/keystone visible: lower projector to screen centerline or raise it; only use keystone correction as last resort.
• Blurry at edges: ensure projector is within recommended throw range and focus evenly across the screen; check for warped screen surface.
• Partially cropped image: match projector and source aspect ratio, or reposition projector within throw range.

Quick tips for permanent installs

• Use the calculator early in planning to pick mounting location and screen size.
• Allow for service access and cable routing when determining mount position.
• If install requires nonstandard throw, consider a short-throw or long-throw lens or different EIKI model.
• Label mounting locations and record calculated distances for future maintenance.

When to contact support or a pro

• Persistent focus or optical issues after correct placement.
• Complex multi-screen or edge-blend setups.
• Mounting constraints that prevent physical alignment (ceiling height, obstructions).

Follow the calculator’s recommended distance and prioritize physical alignment (placement, lens shift, zoom) over digital fixes to get the cleanest, highest-quality image.