Bed leveling with Force Sensing Resistor -> seems to work with simply "touching" the head to the bed. I think this is very intersting. http://reprap.org/wiki/FSR https://reprap.org/forum/read.php?340,318642,318642#msg-318642 Wed, 07 Oct 2026 20:30:35 -0400 Phorum 5.2.23 https://reprap.org/forum/read.php?340,318642,318702#msg-318702 https://reprap.org/forum/read.php?340,318642,318702#msg-318702
Ray]]> rayhicks Ormerod Sun, 02 Mar 2014 16:08:28 -0500 https://reprap.org/forum/read.php?340,318642,318681#msg-318681 https://reprap.org/forum/read.php?340,318642,318681#msg-318681 I think I would like to try HEATING the nozzle and "cleaning" it on the bed. something along the lines of
- home x,y
- heat nozzle
- move to X5 Y5
- lower until "contact" is detected by FSR
- move 2-3mm
- if FSR shows "less contact" -> move z down "a bit", goto move
- else -> must be "really touching" therefore set Z=0

really wondering if this could work...]]> auser Ormerod Sun, 02 Mar 2014 15:31:45 -0500 https://reprap.org/forum/read.php?340,318642,318669#msg-318669 https://reprap.org/forum/read.php?340,318642,318669#msg-318669 forums.reprap.org]. My suggestion is to put the force sensitive resistor in the x-carriage runner bearing mount, see the 5th post in that thread. I have designed my hot end board (see [forums.reprap.org]) so that with a firmware change and a component change, the ultrasonic sensor could be replaced by an FSR.

One disadvantage compared with ultrasonic height sensing is that the nozzle needs to be clean, since any extruded filament stuck on the end will cause premature contact.]]> dc42 Ormerod Sun, 02 Mar 2014 15:20:14 -0500 https://reprap.org/forum/read.php?340,318642,318642#msg-318642 https://reprap.org/forum/read.php?340,318642,318642#msg-318642
http://reprap.org/wiki/FSR]]> auser Ormerod Sun, 02 Mar 2014 14:25:42 -0500