{"id":235377,"date":"2020-05-09T07:07:54","date_gmt":"2020-05-09T05:07:54","guid":{"rendered":"https:\/\/emariete.com\/?p=235377"},"modified":"2020-05-09T07:07:54","modified_gmt":"2020-05-09T05:07:54","slug":"cnc-casera-with-arduino-ii-mechanics","status":"publish","type":"post","link":"https:\/\/emariete.com\/en\/cnc-casera-con-arduino-ii-mecanica\/","title":{"rendered":"Home CNC with Arduino II - Mechanics"},"content":{"rendered":"

Introduction<\/h2>\n\n\n\n

In this article I will take a brief look at the mechanical side of the Homemade CNC with Arduino Root 3<\/strong><\/a>.<\/p>\n\n\n\n

Mechanical assembly it's not complicated<\/strong>although it does requires patience<\/strong> to collect the components, as you will probably order most of the parts from China and it will take time for them to arrive.<\/p>\n\n\n\n

In this kind of projects it is normal that the time is long because most likely you will have to make several orders, as it is very difficult to know exactly what you need at the first time. There will be things that you will have to wait to order until you have others in your hands to see exactly how everything fits together.<\/p>\n\n\n\n

We can divide the mechanical assembly into four parts:<\/p>\n\n\n\n

  1.  3D printed parts<\/li>
  2. Wooden parts<\/li>
  3. Tubes and bearings<\/li>
  4. Hardware<\/li><\/ol>\n\n\n\n

    I will try to give you some advice on each of them as we go along.<\/p>\n\n\n\n

    3D printed parts<\/h2>\n\n\n\n

    You can download the STLs for the printed parts<\/strong> in 3D from the Thingiverse project page<\/a>.<\/p>\n\n\n\n

    Some of the pieces have been improved by other partners<\/strong>I will give you some alternatives below that I think are better than the original ones.<\/p>\n\n\n\n

    You can find more interesting information in the Root CNC website<\/a>. I recommend that you take a look at it to familiarise yourself with the material and information it contains for that you know, when the time comes, what you can count on<\/strong>.<\/p>\n\n\n\n

    Of course, if you have any questions<\/strong> You can also leave a message here, in comments<\/strong>and I will try to answer you.<\/p>\n\n\n\n

    3D printing leads to a long time<\/strong> y a lot of filament<\/strong>.<\/p>\n\n\n\n

    I think it took me about five days<\/strong>with the printer running almost 24 hours a day<\/strong>and approximately 2Kg of PETG filament<\/strong>maybe something else.<\/p>\n\n\n\n

    About the type of filament, don't hesitate, prints the parts in PETG<\/strong> (unless your printer is one of those that doesn't do well with PETG). PLA is not rigid enough and ABS will probably give you a lot of warping and adhesion problems.<\/strong>The pieces are quite large, as many of them are quite large.<\/p>\n\n\n\n

    Every cloud has a silver lining, so while you're printing parts, there's time for things to arrive from China.<\/p>\n\n\n\n

    The rigidity of the parts is very important<\/strong>. I recommend, in general, a infill of a 50%<\/strong>as a minimum, and four perimeters<\/strong>at least.<\/p>\n\n\n\n

    When it comes to printing, the positioning of the parts on the printer bed is important to ensure that you have as few problems as possible. At this page<\/a> you can see the orientation.<\/p>\n\n\n\n

    Many of the pieces that I printed with less infill and less perimeters didn't last long and it's very annoying to have to change pieces after a short time. Also, many of them didn't have the layers well adhered and this later caused problems.<\/p>\n\n\n\n

    These are the first pieces I printed; at the beginning, as I said, I changed many of them. You can see them bigger by clicking on each one of them:<\/p>\n\n\n\n

    Keep in mind that the parts to be printed have a lot of plastic and will take several hours to print.<\/p>\n\n\n\n

    I recommend using a quality printer. I use a Creality CR-10. Here are a couple of the best selling Creality printers, highly recommended.<\/p>\n\n\n

    No products found.<\/p>\n\n\n\n

    There is nothing worse than having been printing for hours and having spent almost a kilo of plastic, only to suddenly realise that the print has been ruined by the poor quality of the printer and you have to throw the plastic away and start again.<\/p>\n\n\n\n