Openbuilds Parts

Created parametric models of some Openbuilds parts using OpenSCAD. These were created by taking measurements off the GrabCAD collection models that Openbuilds has posted.

V-Slot Linear Rail

The file "vSlots.scad" creates an OpenSCAD function named "vslot" that can be used to generate models of Openbuilds V-Slot linear rail. The function "vslot" take two parameters "length" and "type". The length is the desired length of rail to be modeled (in mm). The "type" parameter accepts: 2020, 2040, 2060, 2080, 4040, and "cbeam", which models the following types of rail:

20x20 mm V-slot linear rail

20x40 mm V-slot linear rail

20x60 mm V-slot linear rail

20x80 mm V-slot linear rail

40x40 mm V-slot linear rail

C-Beam linear rail

If file "vSlots.scad" is saved in the same working directory used for modeling, the following example code:

 include <vSlots.scad>
 color("lightgray"){
     vslot(length=50, type=4040);
     translate([70,0,0]) vslot(length=60,type=2020);
     translate([140,0,0]) rotate([0,0,90]) vslot(length=70,type=2040);
     translate([190,0,0]) rotate([0,0,90]) vslot(length=80,type=2060);
     translate([120,100,0]) vslot(length=100,type=2080);
     translate([80,120,0]) rotate([0,0,180]) vslot(length=90,type="cbeam");
 }

Results in the model illustrated in the image below.

Stepper Motors

The file "motors.scad" creates two OpenSCAD functions named "nema17" and "nema23" that can be used to generate models of the three types of Openbuilds stepper motors:

NEMA 17

NEMA 23

NEMA 23 - high torque

When the "nema23" function is called without arguments, or called as "nema23(type="lt")", it produces the model of the standard NEMA 23 motor. Calling the function as "nema23(type="ht") produces the model of the high torque version.

If the file "motors.scad" is saved in the same working directory used for modeling, the following example code:

include <motors.scad>
translate([210,0,0]) rotate([90,0,0]) nema17();
translate([100,0,0]) rotate([90,0,0]) nema23();
translate([0,30,0]) rotate([90,0,0]) nema23(type="ht");

Results in the model illustrated in the image below.

Spacers

The "spacers.scad" file provides OpenSCAD functions "spacerAl" and spacerNylon" that model these two parts:

Aluminum spacers

Nylon spacers

Both of these functions accept a "length" argument for spacer length in mm. For example: spacerAl(length=40); will produce a 40 mm aluminum spacer.

Plates

The "plates.scad" file provides OpenSCAD functions "buildPlate", "cBeamEndMount", "vslotGantry20_80", "cBeamGantry" that model the following parts:

C-Beam End Mount

Build Plate

V-Slot Gantry Plate - Universal (20-80 mm)

C-Beam Gantry Plate

Connectors

The "connectors.scad" file provides OpenSCAD functions "join90deg", "cornerBracket", "lockCollar8mm", and "angleCorner" that model the following parts:

90 Degree Joining Plate

Cast Corner Bracket

Lock Collar (8 mm)

Black Angle Corner Connector

Other Parts

The following models are also provided:

antiBacklashNut.scad --> Anti-Backlash Nut for Acme 8mm Screw

spindleMount.scad --> Router Spindle Mount

vWheel.scad --> Solid V Wheel Kit

Example of using functions to build a machine model

The file "cBeamMachine.scad" is an example of combining the functions to build a machine. It provides a rough model of the C-beam machine. An image of this model is shown below.