Follow two linked pantograph tips through a small scaled corner trace

Original, untested video brief. No input image or generated result is supplied.

1. Task and boundary

Show one short tracing action through an accurately drawn pantograph. The original input tip follows a simple guide with one corner, while the linked output pen makes a corresponding larger path on a separate blank area. The two paths must come from the same connected framework. A larger line appearing beside a smaller one does not demonstrate linked tracing unless the original tips and pivots remain observable.

This is an original, untested visual brief, not a precision drawing method or a calibration certificate. Use a correctly designed enlarging linkage whose two tips and fixed anchor are already defined. Request only a short two-leg trace inside its comfortable reach. Do not assign a numerical enlargement ratio without a separately verified input geometry.

2. Authorized first frame

Provide an accurate drawing or photograph that you own or may use. A near-overhead view should show the fixed anchor, original rigid bars, their pivots, an input stylus and an output pen touching one flat board. The input starts at the beginning of a faint short L-shaped guide. Leave a separate clear area for the larger output trace, with no finished output line already present.

Use different existing colors on the two tip holders. All relevant joints need enough space to move without overlapping completely. The selected linkage must really place the two tips in the intended tracing relation; an arbitrary collection of hinged bars is not an adequate first frame. Keep the output pen near the board and show its contact point.

3. Use the generator

Open the current image-to-video generator in a mode accepting your authorized first frame. Paste the complete prompt, check the available settings and cost estimate, then submit only when ready. This page supplies text; it does not upload an image or start a generation.

4. Prompt and timing

Use my authorized accurately drawn pantograph without changing its linkage layout. Keep its anchor and board fixed. Move the original input tip slowly along the first short straight leg of the faint guide, pause briefly at the corner, then follow its second leg. Let the same connected rigid bars change angle at their original pivots. The original output pen moves at the same time along a corresponding larger two-leg path and leaves one continuous trace only behind its contacting tip. Both tips remain on the board and keep their original identity. Preserve bar lengths, pivot order and the fixed anchor. Stop both tips after the second leg and hold. Do not draw the output ahead of the pen, detach a pivot, grow longer bars, duplicate either tip or zoom the board to create the size difference. No text, automatic ruler, extra stroke, cut or reset.

Opening: identify the anchor, two marked tips and the empty output area.
First leg and corner: follow both tips together and check that the output changes direction when the input reaches its corner.
Second leg and ending: inspect the completed short paths, then hold both original tips at their final positions.

These beats are author suggestions, not exact model timing guarantees. Adapt their proportions to the clip length actually available.

5. Inspect the output

After inspecting your own output, record a time or frame, visible observation and pass, fail or inconclusive judgment for each condition. A convincing ending alone does not verify the preceding action.

The original fixed anchor and board references remain stationary.
Both identified tips move through corresponding first-leg, corner and second-leg stages.
The output path is larger in the intended layout without changing camera magnification.
The output line grows behind the contacting pen rather than appearing ahead of it.
The same bars and pivots remain connected in their original order.
If a tip or essential pivot is obscured at the corner, mark linked-path correspondence inconclusive.

6. Fix one failure

A complete output line appears at once: begin with blank output space and shorten the tracing distance.
The output pen drifts independently: expose the connecting pivots and remove decorative camera movement.
The corner order differs: request a brief input pause and only two straight legs.
Bars change length to reach the guide: shorten the guide and correct the input geometry first.
The output scale changes unpredictably: use a smaller reachable trace and avoid claiming a precise ratio.

7. Ending and limits

Finish with the short input guide and its corresponding larger output trace, the original output pen at the end of that trace, and the connected framework still visible. Do not erase or replay the trace.

Save your own generated result through the available result controls, together with the authorized input, exact prompt, settings and inspection notes.

No generated result or measured scale accuracy is provided. Similar path appearance alone does not establish a working physical pantograph. Inspect visible coupling and stroke timing separately; exact geometric accuracy requires measurements beyond this proposed clip.

The crank-slider task turns one rotation into guided linear travel. This task follows two distinct plane-contacting tips through an ordered corner path while their connected linkage preserves correspondence. It does not substitute a camera zoom or a copied drawing for the tracing process.