grinder.svg · 160 lines
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<text x="64" y="48" class="micro">MECHANISM STUDY / 01</text>
<text x="64" y="97" font-family="Arial,Helvetica,sans-serif" font-size="43" font-weight="600" letter-spacing="-1.2" fill="#253d3b">Manual coffee grinder</text>
<text x="1136" y="91" text-anchor="end" class="note">Conical burr assembly</text>
<text x="64" y="124" class="micro">EXPLODED VIEW</text>
<text x="1136" y="124" text-anchor="end" class="micro">AXONOMETRIC · NOT TO SCALE</text>
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<!-- 01: crank and walnut grip -->
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<!-- 02: removable lid -->
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<!-- 03: hopper, a section window reveals the supported drive shaft -->
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<!-- cutaway through front shell -->
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<!-- interior bearing bridge -->
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<!-- square-ended drive shaft -->
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<!-- 04: lower support / bearing carrier -->
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<!-- 05: stationary female burr. Front half sectioned to reveal tapered toothed bore. -->
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<!-- cutaway bore widens toward outlet -->
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<!-- 06: rotating conical burr, tapered crown and helical cutting flutes -->
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<!-- spiral flutes follow the cone, growing wider toward skirt -->
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<!-- honed leading edges and secondary cutting grooves -->
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<!-- 07: preload spring and threaded click adjustment -->
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<!-- 08: detachable grounds receiver -->
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<g class="num"><text x="850" y="224">01</text><text x="850" y="335">02</text><text x="850" y="552">03</text><text x="850" y="774">04</text><text x="850" y="905">05</text><text x="850" y="1087">06</text><text x="850" y="1232">07</text><text x="850" y="1398">08</text></g>
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<text x="882" y="217" class="label">Crank & grip</text><text x="882" y="244" class="note">Removable handle</text>
<text x="882" y="328" class="label">Hopper lid</text><text x="882" y="355" class="note">Through-hole for shaft</text>
<text x="882" y="545" class="label">Body & drive shaft</text><text x="882" y="572" class="note">Bean hopper / upper bearing</text><text x="882" y="595" class="note">Shell shown cut away</text>
<text x="882" y="767" class="label">Bearing carrier</text><text x="882" y="794" class="note">Centers the drive shaft</text>
<text x="882" y="898" class="label">Outer conical burr</text><text x="882" y="925" class="note">Fixed, toothed tapered bore</text><text x="882" y="948" class="note">Front half sectioned</text>
<text x="882" y="1080" class="label">Inner conical burr</text><text x="882" y="1107" class="note">Rotates with the drive shaft</text>
<text x="882" y="1225" class="label">Spring & adjuster</text><text x="882" y="1252" class="note">Sets burr spacing / grind size</text>
<text x="882" y="1391" class="label">Grounds cup</text><text x="882" y="1418" class="note">Removable collection chamber</text>
</g>
<!-- concise margin annotations -->
<text x="64" y="471" class="micro">HAND-POWERED</text>
<text x="64" y="500" class="note">Crank turns the central</text><text x="64" y="523" class="note">shaft and inner burr.</text>
<path d="M259 506H304L325 402H522" class="leader"/><circle cx="522" cy="402" r="3" fill="#bc7954"/>
<text x="64" y="904" class="micro">CONICAL CUTTING PAIR</text>
<text x="64" y="933" class="note">The inner cone nests inside</text><text x="64" y="956" class="note">the fixed outer burr.</text><text x="64" y="985" class="note">Beans enter above; grounds</text><text x="64" y="1008" class="note">exit through the lower gap.</text>
<path d="M291 929H331L371 907H392M331 929V1075L374 1097H433" class="leader"/>
<text x="64" y="1385" class="micro">ASSEMBLY DIRECTION</text><path d="M80 1408V1477" stroke="#9aa69b" stroke-width="1.5" marker-end="url(#arrow)"/><text x="102" y="1440" class="note">Parts share a common axis.</text>
<text x="64" y="1554" class="note">Conical burrs crush and shear beans between a rotating cone and a stationary tapered ring.</text>
<text x="1136" y="1554" text-anchor="end" class="micro">FIG. 01</text>
</svg>round 1 of 2
Exploded hand grinder: GPT-6.1 Sol
modelopenai/gpt-6.1-soltaskexploded-grinder@v1, checks c1, harness h1date2026-10-07rounds2 of 8 allowed, 12 minutes on the clockcost$0.0958thinkingmediumtokens51,118 in, 7,042 out, of which 1,012 reasoningtime2 min 29 s
All eight partsdecided by looking · Pass if every listed part is drawn as a separate shape and each has a label naming it. A part only named in a label or a comment, with nothing drawn, fails it. The label must say what the part is, in any words: a name that only says where it sits ("top plate") or what it is made of, or a mention in another part's caption, does not count.pass
Stack orderdecided by a number, from the filepass
Parts fitdecided by looking · Pass if each listed pair of mating parts looks as if it would go together as stated: the right angle, nested inside, or sitting on top. One pair that plainly could not fails it.pass
One assembly axisdecided by looking · Pass if one line runs through the middle of every part on each listed axis, and every leader line leaves from the same side. One part pushed off its axis fails it.pass
Labels matchdecided by looking · Pass if following each leader line from its label ends on the part that label names. One label pointing at the wrong part, or at nothing, fails it.pass
There is no post about this one, since only some results need one, so the picture, the source and the scoring are here instead.
run 1 · 2r · $0.0982
run 3 · 2r · $0.0906same prompt, other modelsall 12 runs on Exploded hand grinder →
Draw an exploded assembly diagram of a manual coffee grinder, as an SVG. Use a hand grinder with conical burrs rather than flat burrs.Frozen at v1. This model got this and nothing else.
Top to bottom: handle knob, crank, body, outer burr, inner burr, spring if drawn, adjustment dial, catch jar. The drive shaft runs through the body and both burrs, so it is left out of the order, the way the French press leaves out its rod. The adjustment is at the bottom, below the burrs, and the inner cone comes out downwards through the fixed outer ring. Checked against Comandante's FAQ for the C40, Coffeegeek on the Timemore C2, Hario's spare-parts list and a review for the Skerton Pro, and a guide to the Porlex Mini. The Skerton has no spring, so the spring is not required. How it is scored, and this run's files on GitHub.