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feat: r25 improvements
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24
README.md
24
README.md
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# Brick Monorail
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Parametric Lego-compatible monorail tracks, designed specifically for 3d printing.
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Two orders of magnitude cheaper than buying used.
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Since the parts are made parametric, you can have any length or curve radius you want,
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but these are the original tracks you can replicate
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@@ -11,9 +12,9 @@ As an overview, or why it's worth a try: They print rapidly on modern printers,
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| --------------------- | ------------- | ---------- |
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| C15 | ~10ct | 45m |
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| C7 | ~5ct | 15m |
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| S21 | ~12ct | 1h |
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| S7 | ~5ct | 15m |
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| S6 | ~5ct | 15m |
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| S25 | ~12ct | 1h |
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| S10 | ~5ct | 15m |
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| S5 | ~5ct | 15m |
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| Classic R28 90° Curve | ~25ct | 2h |
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| Classic R28 45° Curve | ~12ct | 1h |
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| Classic L32 Straight | ~20ct | 1.5h |
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@@ -53,24 +54,25 @@ grid with turntables.
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- Straight S21
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- Straight S7
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- Straight S6
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- Incline I4
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Two C15 and one C7 make exactly a 90 degree turn, where every part stays on the stud grid.
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How it fits
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An s-curve with C7 moves two studs, and can be extended by 1 stud
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with S7 or 3 studs with S21.
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- Two C15 and one C7 make exactly a 90 degree turn, where every part stays on the stud grid.
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- An s-curve with C15 moves over 20 studs, diagonals can be done with any length divisible by 5
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- An s-curve with C7 moves two studs, but diagonals require a full S25 to land cleanly again.
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An s-curve with C15 moves over 20 studs, and can be extended by 8 studs
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with S6 or 28 studs with S21 straights.
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## Printing
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To be compatible with standard bricks, the following print settings are strongly advised
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- Nozzle: **0.4**, this is equivalent to 1 LDU.
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- Layer height: **0.2** will also do. Refrain from using 0.15, since that does not cleanly divides the LDU.
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- Make sure your initial layer height is either 0.2 or 0.4!
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- Layer height: **0.2**, less than that is barely better and just causes more problems than it solves.
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If you want to go lower, it's advisable to use heights that satisfy `0.4 % h == 0` such as 0.1.
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- **Make sure your initial layer height is either 0.2 or 0.4!**
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- Supports: **yes**, normal, don't use tree supports.
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what you would call easy for the printer, so be on the lookout.
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- Set your "Initial Layer Horizontal Expansion" to a value that works for you, for example -0.2mm to compensate for elephant's foot.
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Alternatively, you can trim the extra plastic off by hand.
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51
r25.svg
Normal file
51
r25.svg
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<svg version="1.1"
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viewBox="0 0 100 50"
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width="1000" height="500"
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xmlns="http://www.w3.org/2000/svg">
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<defs>
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<pattern id="smallGrid" width="1" height="1" patternUnits="userSpaceOnUse">
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<circle cx="0.5" cy="0.5" r="0.25" fill="none" stroke="#0004" stroke-width="0.05" />
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</pattern>
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<pattern id="grid" width="10" height="10" patternUnits="userSpaceOnUse">
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<rect width="1000" height="10" fill="url(#smallGrid)"/>
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<path d="M 10 0 L 0 0 0 10" fill="none" stroke="#0006" stroke-width="0.1"/>
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</pattern>
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</defs>
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<rect width="100%" height="100%" fill="url(#grid)" />
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<text font-size="4" x="1" y="4">R25 Monorail</text>
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<path d="M40 30 a 25 25 0 0 1 5 -15" stroke-width="4" stroke="#0f0a" fill="none" />
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<path d="M45 15 a 25 25 0 0 1 5 -5" stroke-width="4" stroke="#f00a" fill="none" />
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<path d="M65 5 a 25 25 0 0 0 -15 5" stroke-width="4" stroke="#0f0a" fill="none" />
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<path d="M10 8 a 25 25 0 0 1 15 5" stroke-width="4" stroke="#0f0a" fill="none" />
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<text x="1" y="8" font-size="2" dominant-baseline="middle">C15</text>
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<path d="M10 14 a 25 25 0 0 1 7 1" stroke-width="4" stroke="#f00a" fill="none" />
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<text x="1" y="14" font-size="2" dominant-baseline="middle">C7</text>
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<path d="M10 20 l25 0" stroke-width="4" stroke="#00fa" fill="none" />
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<text x="1" y="20" font-size="2" dominant-baseline="middle">S25</text>
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<path d="M10 26 l10 0" stroke-width="4" stroke="#00fa" fill="none" />
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<text x="1" y="26" font-size="2" dominant-baseline="middle">S10</text>
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<path d="M10 32 l5 0" stroke-width="4" stroke="#00fa" fill="none" />
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<text x="1" y="32" font-size="2" dominant-baseline="middle">S5</text>
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<path d="M10 38 l4 0" stroke-width="4" stroke="#00fa" fill="none" />
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<text x="1" y="38" font-size="2" dominant-baseline="middle">S4</text>
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<path d="M70 8 a 25 25 0 0 1 7 1" stroke-width="4" stroke="#f007" fill="none" />
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<path d="M84 10 a 25 25 0 0 1 -7 -1" stroke-width="4" stroke="#f00a" fill="none" />
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<path d="M60 12 a 25 25 0 0 1 15 5" stroke-width="4" stroke="#0f07" fill="none" />
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<path d="M90 22 a 25 25 0 0 1 -15 -5" stroke-width="4" stroke="#0f0a" fill="none" />
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<path d="M30 38 a 25 25 0 0 0 15 -5" stroke-width="4" stroke="#0f0a" fill="none" />
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<path d="M45 33 l 4 -3" stroke-width="4" stroke="#00fa" fill="none" />
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<path d="M49 30 a 25 25 0 0 1 15 -5" stroke-width="4" stroke="#0f0a" fill="none" />
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<path d="M30 46 a 25 25 0 0 0 7 -1" stroke-width="4" stroke="#0f0a" fill="none" />
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<path d="M37 45 l 24 -7" stroke-width="4" stroke="#00fa" fill="none" />
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<path d="M61 38 a 25 25 0 0 1 7 -1" stroke-width="4" stroke="#0f0a" fill="none" />
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</svg>
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