<p>TL;DR - For a given Kossel frame size (w.r.t. the vertical and horizontal frame lengths of the aluminium extrusion), what would the length of the carbon fibre rods be?</p>

<hr>

<p>A case in point, from <a href="http://reprap.org/wiki/Kossel" rel="nofollow noreferrer">RepRapWiki - Kossel</a>, there is an intriguing note about a scaled down Kossel:</p>

<blockquote>
  <p>Optionally scale down to a Traveling RepRap that fits within IATA hand
  luggage size limit (see transportation):</p>
  
  <ul>
  <li>Frame height: 550&nbsp;mm.</li>
  <li>Footprint: triangle, 270&nbsp;mm width, 250 mm across (210&nbsp;mm 15 x 15&nbsp;mm aluminium extrusion like OpenBeam + printed corners).</li>
  </ul>
</blockquote>

<p>However, there is no mention of the length of the carbon fibre rods (carbon tubes).</p>

<p>Now, as per my previous question, <a href="https://3dprinting.stackexchange.com/questions/3965/for-a-larger-build-volume-what-lengths-of-2020-aluminium-do-i-need">For a larger build volume, what lengths of 2020 aluminium do I need?</a>, is there a formula or ratio by which one needs to abide? Whereas in my previous question, the answer was along the lines of: <em>Not really, you can use any lengths, within reason, and account for it later in the firmware</em>, I would imagine that the Delta aspect of the printer is somewhat more exacting.</p>

<p>I have tried googling for further information on this Travelling Kossel, but found nothing, except for the information of RepRapWiki.</p>

<p>Looking at the corresponding lengths (vertical/horizontal) of the aluminium versus those of the carbon fibre rods for the Mini and XL:</p>

<ul>
<li>600/240 mm versus 180 mm</li>
<li>750/360 mm versus 300 mm</li>
</ul>

<p>I really can not see what the (trigonometric) relationship is, and therefore can not deduce the lengths of the carbon rods for the Travelling Kossel. </p>

<p>Unless it is simply that the carbon rods are 60&nbsp;mm shorter than the aluminium horizontals? Is it really as simple as that, or is this just a coincidence? In which case, would the carbon rods be (210 - 60 =) 150&nbsp;mm?</p>

<p>By extension, imagine if you wanted to build a Kossel XXXL, with a horizontal aluminium extrusion length of, let's say, 1000&nbsp;mm, would the length of the carbon rods be 940&nbsp;mm?</p>

<p>Any ideas?</p>

[{'answer_id': 4006, 'author': 'TECTEC3 Studios', 'author_id': 7019, 'author_profile': 'https://3dprinting.stackexchange.com/users/7019', 'pm_score': -1, 'selected': False, 'text': "<p>Try changing the travel speed in you r slicer, if that doesn't work , try changing out the motors for newer ones.</p>\n"}, {'answer_id': 5523, 'author': 'Zillo7', 'author_id': 10005, 'author_profile': 'https://3dprinting.stackexchange.com/users/10005', 'pm_score': 4, 'selected': True, 'text': '<p>I had the same problem, and I solved it by changing the <em>Z-Axis Feed Rate</em> to a much higher value (1000 mm/min.) in Repetier Host via <em>Config -> Printer Settings -> Printer</em>.</p>\n'}, {'answer_id': 5525, 'author': 'Martynas', 'author_id': 9733, 'author_profile': 'https://3dprinting.stackexchange.com/users/9733', 'pm_score': -1, 'selected': False, 'text': '<ol>\n<li>I would guess (without G code) to change start G code. You should find it in Cura, the feed rate should be low there. </li>\n<li>Try other slicer and print from SD card.</li>\n<li>Try using other software. Try Cura it self if SD card printing is not available.</li>\n</ol>\n\n<p>Picture is just an example what to look in Repertier or Cura.\n<a href="https://i.stack.imgur.com/4tQ7R.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/4tQ7R.jpg" alt="enter image description here"></a></p>\n'}]
['https://3dprinting.stackexchange.com/questions/4012', 'https://3dprinting.stackexchange.com', 'https://3dprinting.stackexchange.com/users/4762/']