Parametric tube rack

thingiverse

Parametric tube stand, designed in OpenSCAD Ever had to work with quite a few NMR tubes using eppendorf/falcom stands or pipette tips racks? Tubes won't stay in place, use too much bench space, mix. So I decided to design a tube stand. And I made it parametric, so it can be used to generate arbitrary stands for different kind of tubes and sizes as desired. I posted a picture of a "working" model with holes separated by 15 mm and of a "storage" model (more compact but more difficult to manipulate) with holes separated 10 mm. You can preview the assembled tube stand by uncommenting the final lines, and then render each part separately as STL to print Parameters `holeDiam=5 ; //diameter of holes: 6.5mm for NMR tubes; 12mm for eppendorf tubes; 18mm for 15ml Falcom tubes; 30mm for 50 ml Falcom tubes; 14 mm for cuvettes;` `squareHoles=false; // square holes for cuvettes` `w_distance=15 ; //distance between the center of the holes in the width direction. Has to be larger than hole radius` `d_distance=15 ; //distance between the center of the holes in the depth direction. Has to be larger than hole radius` `w_num=5 ; //number of holes in the width direction` `d_num=3 ; //number of holes in the depth direction` `margin=8 ; //margin between the border of the holes and the sides of the rack` `central_plate=true; //whether to include a central plate` `base=10 ; //height of the base plate` ` first=30 ; //height of the central plate ` `second=100 ; //height of the second plate 30 mm for eppetndorf tubes, >50 mm for Falcom tubes` `top_margin=10 ; // margin between the top plate and the end of the side plate` ` //size of the number labels. Use at least 3 for clear printing` `numberSize=3;` `//plates thickness, recommended 3> 2mm to get reasonable strength` `thick=2;` `//plates supports. May be necessary for thin walls and/or larger racks` `add_plate_support=true;` `//Side plate engraving. Set true to add svg file with text or logo` `engraving=true;` `engravingFile="Lab5rr.svg";``