by EclecticAngler, published
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This is a simple, printable mounting system for FSR auto leveling (worse sensitive resistors). I've used these on Rostock Max, Kossel 250, Mini Kossel delta printers and also in a Taz 4 Cartesian printer. I highly recommend buying the FSR Kit from UltiBots - it comes with the JohnSL interface board, the wiring harnesses with preassembled connectors. They work perfectly with this mount.
UPDATE: I've added a second version that is designed for the Kossel 250 or similar printers. There are 2 mount parts, one is for a threaded insert, the other is plastic and can be threaded directly. This extra hole is for an M3 cap screw that fixes the Holddown part as shown in the attached photo.
.2mm layers, 4 perimeters
I print these in PLA but make sure your heated bed has insulation under it if you do. ABS makes good parts too.
Print 3 holders, 3 plungers and 1 of the JohnSL brackets. The TAZ bracket holds the board vertically, the other holds it flat - which is more suitable for delta printers like the Rostock Max.
It is critical that the plunger slides free - but without slop - in the mount. The plunger was designed with 3 points of contacts to make them easy to fit. First, clean out the pockets in the mounts to make sure they are smooth. Test the plunger. If it is too tight, lightly sand the surface of the 3 lobes with 400 or 600 grit paper and water. Rinse thoroughly so you don't introduce grit into the mechanism and test the fit often (after rinsing). Once the fit is perfect, keep the mount/plunger pair together.
I lubricate the plunger with a little Vaseline or white lithium grease - VERY little!
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FSR Mounts by EclecticAngler is licensed under the Creative Commons - Attribution license.
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