Beam Bench Docs

Camera mapping fails

Solve rejects the point set or reports a poor fit.

If you have fewer than 3 points

Camera Mapping and Camera Alignment require at least 3 point pairs.

If the points are on one line

Both sides of the point pairs must span a non-zero area. Three points along one bed edge are not enough. Use points that form a large triangle, or 4 or more points spread around the useful image area.

If an image point is outside the frame

Image X must be between 0 and the frame width. Image Y must be between 0 and the frame height. Capture a current frame and check its dimensions at the top of the dialog.

If RMSE is high

Recheck every pair. Each image point must refer to the same physical feature as its reference or workspace coordinate. One transposed coordinate can pull the whole fit away from the other points.

Use clearly identifiable features and spread them across the area where you will place jobs. Closely clustered points make errors outside that cluster harder to detect.

If the center aligns but the edges do not

The solver fits uniform scale, rotation, and translation. It cannot remove lens distortion or perspective. A wide-angle or fisheye lens can therefore produce a mathematically valid solve that is still inaccurate near the edges.

Use a less distorted lens, increase the camera-to-bed distance, and mount the camera as square to the bed as practical.

Verify the result

  • Lower RMSE is better, but do not use Quality alone as a pass/fail threshold.
  • Check several known physical positions after saving.
  • Run Frame before starting a job placed with the camera.

Still stuck?

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If you have fewer than 3 pointsIf the points are on one lineIf an image point is outside the frameIf RMSE is highIf the center aligns but the edges do notVerify the resultStill stuck?