Hi all !
Has anybody used these (I mean exactly these) FSRs http://www.watterott.com/index.php?page=product&info=1517 for the bed leveling on their deltas ?
(these are the sparkfun ones , more specs here https://www.sparkfun.com/products/9375).
From the specs , they are not exactly the same as the ones from Phidgets mentionned by @Johann_Rocholl at http://reprap.org/wiki/FSR, so a bit unsure if they would work just as well without too much tweaking
I will be honest, I have 2 to 3 weeks to order these for up to 9 deltas, get them , assemble them, and I know Waterott delivers fast, and I will have very little time to tweak, so thanks for the help in advance !
Haven’t used exactly those, but pretty much any FSR will do.
@Thomas_T_Sorensen thanks for the info !
Given the sensing range 100g -10kg, and the similarities with the one from Phydgets, I do not see any obvious issue, but I would like to avoid having 27 “useless” (for this use at least) sensors on my hands 
Well depending on which implementation you’re using it should just be a matter of either choosing your voltage divider to fit the FSR, or setting the correct threshold in firmware (or is this done automatically now? Not sure).
My latest version of Marlin (fsr branch on GitHub) auto-adjusts the analog FSR threshold before each Z probing point.
@Johann_Rocholl Nice. I’m building an army of kossel derivatives and was thinking of using a trinket for auto adjusting FSR (as is being discussed in the deltabot google group), but I’m guessing your newest version of marlin now does the same thing without needing an extra microcontroller? (Also, thanks for designing the awesome kossel mini)
@Johann_Rocholl thanks a lot ! That is perfect ! A lot of new reprappers are going to be very happy with the auto-calibration
Also ditto what @Thomas_T_Sorensen thanks a lot for all your inspirational work !
@Thomas_T_Sorensen , thanks a lot for all the infos !