I designed a simple bumper to prevent my robot vacuum from attempting (and mostly succeeding, although it takes a while) to climb on my laundry drying rack instead of going around it. I'm printing it vertically to ensure the clips are the strongest they can be. It printed fine in PLA.
I've made my bumpers 180mm long and the diameter of the hole 16.3mm to print them on my A1 mini and fit my Brabantia drying rack but you can edit both parameters simply by inputting your own dimensions using the user parameters in the attached parametric file.
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