Wall Mounted Magnetic "Hook"

thingiverse

I wanted some hooks right next to my door so I could hang up my dog's collars conveniently. I decided to try something new, so I embedded big rare earth magnets into the print job for a unique look. I used the following magnets: https://www.amazon.com/gp/product/B06XD2X45M/ref=oh_aui_search_detailpage?ie=UTF8&psc=1 This print job was optimized for an initial layer of 0.425mm and subsequent layers of 0.18mm. Print the job through layer 20 (3.845mm) and have the printer pause before inserting two magnets (2.75mm x 29.5mm). Restart the print job at layer 21 to finish printing above the magnets. I'm not including the .gcode files I used because different commands are required based on what type of gcode your printer uses and how you deliver that code to the printer, as well as the method you use to prepare the gcode. I used Simplify3D and created two .gcode files. The first file had a stop printing at 3.85mm set in the process settings, while the second file started printing at 3.85mm with no skirt since it would be unsupported. I waited for the first file to finish printing before inserting the magnets and then queued up the second file, which continued printing above them. There is 0.9mm of plastic above the magnet on this print job, which is 5 layers at 0.18mm each. Next time, I'll see how many layers I can get down to for a stronger connection between the magnets and metal. I think three layers should be enough to achieve a nice finish with the magnets closer together. If you want a thinner top surface, tell your slicer in the second file to start at 3.85mm and stop at 4.39mm. The grade of these magnets wasn't listed on Amazon, so I picked N42 using an online calculator. The magnets were ~29.5mm in diameter on my calipers, not 32mm as listed. I attached the calculations for how much strength you lose with 5 layers or 3 layers of plastic between the magnet and metal. Surprisingly, the magnets didn't try to attach themselves to the heater block or nozzle as I feared they would. I secured this print to the wall using command strips.