Drawing compass: keep one center while tracing one circle

Original video brief; method not independently tested. No input image or generated result is supplied.

1. Task and source boundary

Show how a drawing compass makes a circle: one tip stays at the center while the other travels across the paper and leaves a trace. The useful demonstration connects the tool's two contact roles to the growing line, rather than showing only a finished circular graphic.

STAEDTLER describes a compass with two joined legs: a needle secures one leg to a surface, while the other carries a drawing lead. Their separation sets the circle radius. Its product-category explanation was read directly on 23 October 2026 (China Standard Time). This supports those tool roles, not the accuracy of a generated circle or the suitability of a particular input. Manufacturer compass explanation

Use a conventional two-leg drawing compass whose opening has already been set and secured for drawing. The single clockwise circuit and final hold below are an authored shot plan. Do not change its opening during the shot or combine radius adjustment, distance transfer, repeated tracing, an extension arm or circle cutting. This is a drawing-tool task, not a magnetic navigation-compass task.

2. Prepare a readable input

Prepare a photograph or accurate drawing you own or have permission to use. Show one open drawing compass over a flat fixed sheet, with its point on a small center dot and its lead touching a separate tiny start dot to the right. Apart from those two dots, the intended drawing area starts blank. Include the original hand gripping the top handle, both legs and both contact locations. Keep the hand above the contacts, and keep the full intended circuit within the sheet and frame. No manufacturer image or input file is supplied.

Use a nearly overhead view that can distinguish the center point, moving lead and newly drawn line. Check your actual tool's grip, secured opening and clearance around the full circuit before choosing the image. Do not assume a wide view makes a hidden contact visible. If the hand or legs would conceal the center, tracing tip or closing junction for the needed interval, revise the setup; otherwise those relations must remain inconclusive. A circle on the paper may look elliptical in an oblique view; do not force a screen-perfect circle by changing the legs.

3. Open the current generator

Open image-to-video and choose the current MiniMax H3 mode that accepts one authorized image as the first frame. If First Frame is not visible, enable Add end frame, then place your authorized image in First Frame rather than the reference-image area. Leave an optional last frame empty; if two frames are required, select a compatible mode. Adapt tool and marker descriptions to your actual input. Check the full prompt, current settings and credit estimate before manual submission. The link prepares model and prompt text only; it does not upload an image or start generation.

Open prompt draft

4. Complete prompt and sequence

Start from my authorized image of one open drawing compass, one hand on its top handle, and a fixed sheet with only a center dot and a tiny start dot. Keep the camera, sheet corners and lighting fixed. The compass point remains on the original center dot. The existing hand turns the same compass clockwise through one circuit around that point, keeping the original leg opening and rigid leg shapes unchanged. The lead stays in contact with the paper and travels from the original start dot around the center back to that same start. Let one thin graphite trace grow only immediately behind the moving lead; previously drawn portions remain attached to the paper. Keep the paper ahead of the lead blank. Preserve the same two legs, their upper connection and the two distinct tip roles. Do not slide the center point, change the opening, bend a leg, spin the paper, add a full guide circle, draw distant arcs early, swap tools or add hands. Stop when the lead first returns to its starting point, leaving one continuous closed trace in the paper plane, and hold without a second revolution or a lift. Keep both contacts and the closing junction readable; do not invent a transparent tool to reveal hidden parts. No camera move, edit, lettering, filled disc, spiral or extra ring. Do not imply a measured radius or validated drafting accuracy.

Identify the two original dots and their different roles: the point stays at the center; the lead starts at the outer dot. Confirm that no full circle already exists.
Keep the opening set before motion. Turn the original tool once while tracking the center contact and the lead together; a fixed center alone does not establish where the line came from.
Inspect the growing trace behind the lead at several separated positions around the circuit. Compare untouched paper ahead with the persistent trace behind, and check that the paper itself has not rotated.
At the first return to the start, inspect the joining ends and stop. Record a hidden closing junction as inconclusive; do not infer correct closure from a circle that appears only in the ending.

5. Inspect an actual output

Only after inspecting an actual output, record each criterion, time or frame, visible observation and pass, fail or inconclusive judgment. Follow both tip contacts and the line front through the shot. If a necessary contact or the closing junction is obscured, mark that relation inconclusive. An attractive round ending does not prove a fixed center, unchanged opening or contact-driven drawing.

The sheet, its corners and original center dot remain fixed; the circle is not created by spinning or replacing the paper.
The compass point stays at the same center dot throughout the visible circuit, without sliding or becoming the marking tip.
The same two legs and upper connection remain coherent, with no opening change, telescoping or new hinge during motion.
The lead remains on the paper and one connected trace grows immediately behind it, with no isolated arc appearing ahead.
Already drawn portions stay on the sheet and do not rotate with the compass or disappear behind it.
The lead returns to the original outer start and the trace closes there without a visible gap, extra loop, spiral or second circuit.
The ending retains one unfilled closed trace and the same tool held at the start; obscured contacts or closure are not reported as verified.

6. Repair one failure at a time

The center drifts: keep the original center dot and nearby paper detail visible; fix the setup before strengthening motion language.
The trace becomes a spiral: preserve the already secured opening, and inspect leg shape and center position throughout the circuit.
A finished circle appears at once: remove reveal or logo language and tie each newly drawn part to the lead's current contact.
The trace turns with the tool: assign the graphite to the fixed sheet and compare a completed segment while the lead moves elsewhere.
The lead makes another lap or misses the start: use the original outer dot as the first-return stop and inspect that junction before accepting the ending.
The hand hides a required contact: change the authorized input and viewing angle. Do not substitute a transparent mechanism or a successful-looking final frame for missing observations.

7. Ending, saved result and limits

The original compass holds at its starting orientation after one circuit. The point remains at the center dot, the lead is back at the outer start, and one unfilled closed trace stays on the same sheet.

After your own generation completes, use the normal result-download control to save the video. Keep the authorized input, exact prompt, settings and time-stamped observations together. Saving a clip does not replace inspecting its contacts and trace progression.

No H3 generation, calibrated radius measurement, drafting tolerance, lead-pressure test or product performance validation is included. Screen-space distances can change with perspective. Use actual drafting tools or controlled vector drawing when exact dimensions or a guaranteed circle are required. Follow the instructions for the real compass and handle its point appropriately.

The line-reveal task darkens a pre-existing guide and explicitly excludes a drawing tool. The watch task rotates a hand without leaving material on a surface. This task couples a fixed point, a second moving contact and a persistent trace that closes on its own starting location. Changing only the color, radius or compass brand would not create another task.