The place where I work has a refrigerator in the kitchen. The water dispenser in the door is wonky and before yesterday, it wouldn’t turn off automatically. Perhaps at one time, there was a spring which makes that tab want to stay forward but it was broken a long time ago. Most new students were initiated to this when they accidentally spilled at least a cup of water on the floor.
So of course, I decided to fix it using the 3D printer at work. This was made more difficult since I hadn’t brought a digital caliper with me nor a ruler. I used earlier-printed parts to measure the tab (since I did know their dimensions) and then went to work.
Autodesk Fusion 360
The first step was to design the part in a CAD program. Imagine this then fitting over the tab with the extended “spring” resting against the back panel of the refrigerator. I had to plan in the amount of force required as well as that necessary to keep the part from sliding off as well as the internal play required to fit this over the tab.
Next, it was necessary to “slice” the model file into a toolpath file for the printer, a set of instructions which it needs to create the part. I used PLA filament since it’s easy to work with and decided to orient the part sideways on the bed so that the spring part wouldn’t be an overhang (which sometimes causes problems). This meant that the printer at the end would need to bridge the two walls it had created with a 5mm gap between them.
Flashforge Creator Pro
I transferred the toolpath file to the printer and got it going, noting the time. I made some guesstimates about when it would finish and it was done about five minutes after my shift completed. It bridged that 5mm gap without a problem, finishing the “roof” at the top.
While it was still hot, I put the part in place on the refrigerator and it fit, working perfectly and solving the problem. Use a glass to push against the tab, water dispenses. Release and the water stops. No more huge spills on the floor as a result.