How to Attach Two Objects to Each Other Using a 3D Printer.

Did you know it is possible to connect any two household objects with the power of 3D printing? Here is How!

Access to a 3D printer

Access to a 3D engineering / CAD software of your choice

3D printing filament

Imagine how the two parts will connect to each other. Then ask yourself, is this a strong connection? Could either part slip out of the connector? Is there a better or simpler way to connect the two objects?

Sketching what you want on paper can help you visualize exactly what you want, however it isn't required.

Use a device that can measure distance to figure out the dimensions of the parts.

I highly recommend a pair of calipers.

You could also add the dimensions to the sketch you made.

If you want, you could model the two objects that you are connecting in the CAD software, but it isn't required.

1. You can use the reference models to make sure that the design that you have envisioned has the correct measurements

measure the dimensions that your part will attach to with a pair of calipers or a ruler.

Then model the part that you want, making sure that the dimensions are correct.

When modeling, remember, printers are not perfectly precise and if the tolerances are too tight, your print will be too small to connect to your part.

1. To avoid this, the rule of thumb is to allow an additional 0.4 millimeters of empty space, however the exact amount you will need to add will vary on the printer and how it is configured.

Import the 3D model into your slicing program of choice. Then select the .gcode viewer option. Then use the scroll bar on the side to show how the 3D printer will print the model. Then think to yourself, is it physically possible for the printer to successfully print this? Are there parts where the printer has to print something in midair? Is there part where there are steep overhangs?

1. If so, consider how you can change the design to eliminate or minimize where this occurs.
2. If a floating part is absolutely required, then make sure to add support material
3. If there is a floating part that is connected to a non-floating object on either side, that is called bridging. Most printers can handle small bridges, but longer bridges can sag and ruin dimensional accuracy and even make a part fail
4. overhangs are less of an issue, as most printers are capable of printing some extreme overhangs. But the rule of thumb to try to avoid overhangs of more than 45 degrees. Nearly all printers can print overhangs of 45 degrees or less.

Take the part off the printer, does it fit as intended? If not, that is normal. Especially for a first print.

Look at the printed part and see where you need to make changes. Is the printed part smaller or bigger in places? What measurements need to be changed in order for it to fit properly? Edit the part as needed and go back to step 4.

If the part fits, great! You have successfully harassed the power of 3D printing to make something from your imagination into reality!