grinder.svg · 145 lines
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<text x="62" y="48" class="micro">MECHANICAL STUDY / 01</text>
<text x="60" y="92" font-family="Arial,sans-serif" font-size="38" font-weight="600" fill="#203c43">Manual coffee grinder</text>
<text x="1038" y="52" text-anchor="end" class="micro">EXPLODED ASSEMBLY</text>
<text x="1038" y="91" text-anchor="end" class="desc">Conical burr mechanism</text>
<!-- Shared assembly axis; gaps indicate separated components. -->
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<text x="425" y="1465" text-anchor="end" class="micro">ASSEMBLY AXIS</text>
<!-- 01: offset hand crank, wooden grip and square socket. -->
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<text x="813" y="202" class="label">Crank & grip</text><text x="813" y="225" class="desc">Hand-driven lever</text>
<!-- 02: removable hopper cover. -->
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<circle cx="790" cy="326" r="13" fill="#2b6670"/><text x="790" y="331" class="num">2</text>
<text x="813" y="322" class="label">Hopper lid</text><text x="813" y="345" class="desc">Central shaft clearance</text>
<!-- 03: square-ended drive spindle. -->
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<circle cx="790" cy="460" r="13" fill="#2b6670"/><text x="790" y="465" class="num">3</text>
<text x="813" y="456" class="label">Drive shaft</text><text x="813" y="479" class="desc">Square drive / threaded end</text>
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<text x="258" y="453" text-anchor="end" class="micro">AXIAL</text><text x="258" y="470" text-anchor="end" class="micro">SEPARATION</text>
<!-- 04: hopper housing, with an illustrative front cutaway. -->
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<!-- Interior bearing bridge visible through the open hopper -->
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<text x="813" y="680" class="label">Body & hopper</text><text x="813" y="703" class="desc">Bearing-supported housing</text>
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<text x="78" y="709" class="micro">CUTAWAY WINDOW</text><text x="78" y="730" class="desc">Internal bearing support</text>
<!-- 05: fixed annular burr, tapering inward toward its outlet. -->
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<!-- Serrated conical inner face -->
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<text x="813" y="884" class="label">Outer ring burr</text><text x="813" y="907" class="desc">Fixed • toothed conical bore</text>
<!-- 06: rotating cone. Narrow top, wide cutting skirt, helical flutes. -->
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<text x="813" y="1032" class="label">Inner conical burr</text><text x="813" y="1055" class="desc">Rotates with the drive shaft</text>
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<text x="78" y="978" class="micro">CONICAL BURR PAIR</text><text x="78" y="1001" class="desc">Cone nests inside the ring.</text><text x="78" y="1022" class="desc">Beans grind in the tapered gap.</text>
<!-- 07: compression spring with separate thrust washer. -->
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<text x="813" y="1154" class="label">Washer & spring</text><text x="813" y="1177" class="desc">Axial preload on the burr</text>
<!-- 08: bottom adjustment nut. -->
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<text x="813" y="1246" class="label">Grind adjustment</text><text x="813" y="1269" class="desc">Threaded nut sets burr gap</text>
<!-- 09: removable grounds receiver. -->
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<text x="455" y="1416" text-anchor="middle" font-family="Arial,sans-serif" font-size="12" letter-spacing="3" fill="#b9cfca">COFFEE</text>
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<circle cx="790" cy="1394" r="13" fill="#2b6670"/><text x="790" y="1399" class="num">9</text>
<text x="813" y="1390" class="label">Grounds cup</text><text x="813" y="1413" class="desc">Removable collection vessel</text>
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<text x="62" y="1524" class="micro">HAND POWERED / CONICAL BURRS</text>
<text x="1038" y="1524" text-anchor="end" class="desc">Schematic • parts separated along shaft axis • not to scale</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$0.0906thinkingmediumtokens50,155 in, 6,640 out, of which 752 reasoningtime2 min 15 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 2 · 2r · $0.0958same 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.