grinder.svg · 151 lines
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<text x="58" y="88" class="heading" font-size="12" letter-spacing="3">ASSEMBLY STUDY / 01</text>
<text x="55" y="139" class="heading" font-size="42" font-weight="700" letter-spacing="-1">Manual coffee grinder</text>
<text x="58" y="169" class="desc" font-size="16">Conical burr mechanism · exploded view</text>
<text x="1043" y="88" text-anchor="end" class="desc" font-size="12" letter-spacing="2">HAND-POWERED</text>
<!-- Common assembly axis -->
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<text x="242" y="1374" class="desc" font-size="11" letter-spacing="2">ASSEMBLY AXIS</text>
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<!-- 01: crank, offset wooden grip -->
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<!-- 02: lift-off lid -->
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<!-- 03: axle and bearing bridge, removed as a subassembly -->
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<!-- 04: hollow hopper and housing -->
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<path d="M 312,557 Q 420,605 528,557" fill="none" stroke="#8da3ab" stroke-width="2"/>
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<text x="420" y="650" text-anchor="middle" font-family="Arial,sans-serif" font-size="11" letter-spacing="2" fill="#d6dfdd">MANUAL</text>
<!-- 05: stationary female conical burr; open tapered throat -->
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<!-- Cutting flutes on the visible internal conical face -->
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<ellipse cx="500" cy="817" rx="4" ry="2.5" fill="#3c5661"/>
<!-- 07: male cone, with spiral cutting lands -->
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<!-- 06: compression spring, between shaft shoulder and inner burr -->
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<!-- 08: threaded adjustment wheel -->
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<!-- 09: detachable grounds cup -->
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<!-- Callouts -->
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<text x="731" y="224" class="num">01</text><text x="765" y="224" class="label">Crank & grip</text><text x="765" y="247" class="desc">Hand-driven lever · wood knob</text>
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<text x="731" y="309" class="num">02</text><text x="765" y="309" class="label">Hopper lid</text><text x="765" y="332" class="desc">Removable cover with axle opening</text>
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<text x="731" y="409" class="num">03</text><text x="765" y="409" class="label">Drive axle & bearing</text><text x="765" y="432" class="desc">Bridge centers the rotating shaft</text>
<path d="M 541,633 H 710" class="leader"/><circle cx="541" cy="633" r="3" fill="#ad623a"/>
<text x="731" y="626" class="num">04</text><text x="765" y="626" class="label">Hopper / housing</text><text x="765" y="649" class="desc">Holds beans and locates the burr set</text>
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<text x="731" y="835" class="num">05</text><text x="765" y="835" class="label">Fixed outer burr</text><text x="765" y="858" class="desc">Ring with a tapered, toothed throat</text>
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<text x="731" y="934" class="num">06</text><text x="765" y="934" class="label">Preload spring</text><text x="765" y="957" class="desc">Keeps the burr seated on the adjuster</text>
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<text x="731" y="1033" class="num">07</text><text x="765" y="1033" class="label">Rotating conical burr</text><text x="765" y="1056" class="desc">Spiral cutting teeth · keyed to axle</text>
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<text x="731" y="1145" class="num">08</text><text x="765" y="1145" class="label">Grind adjustment</text><text x="765" y="1168" class="desc">Threaded wheel sets the burr gap</text>
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<text x="731" y="1297" class="num">09</text><text x="765" y="1297" class="label">Grounds cup</text><text x="765" y="1320" class="desc">Detachable collector below the burrs</text>
</g>
<!-- Small mechanical explanation -->
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<rect x="60" y="1432" width="4" height="36" fill="#ad623a"/>
<text x="80" y="1445" class="heading" font-size="13" font-weight="bold">HOW IT GRINDS</text>
<text x="249" y="1445" class="desc" font-size="13">Beans pass between the stationary ring and rotating cone.</text>
<text x="249" y="1466" class="desc" font-size="13">Axial adjustment changes their clearance, controlling grind size.</text>
<text x="1040" y="1466" text-anchor="end" class="desc" font-size="11">SCHEMATIC · 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$0.0982thinkingmediumtokens53,394 in, 7,210 out, of which 674 reasoningtime2 min 16 sfailedStack order: false, relation transposed, critical, near miss: 1 pair out of order, its note said nothing was wrong
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 filefail
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 2 · 2r · $0.0958
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.