The FLSUN Delta Printer Series QQ-S where delivered with a silly sticky plate for auto leveling.
Later versies came with a switch which you can also buy as an 24$ upgrade. This kit is quite complicated to install and not very nice because you had to open the bottom and end up with wires coming out.
Just finished my own Clip ON auto leveling switch. After all we are makers. Cost of nothing and fun to do.
No need for al the hassle to open the base, rewire anything to end up with loose wires coming out under the printer as with the FLSUN Switch solution.
Used a regulair micro switch, a spring laying around (that just fit around the nozzle) to make good ground contact with the heat block, and Fusion 360.
Only to adjust the >Z_PROBE_HEIGT to 4.5 in the Robin Mini config.txt en re-flash.
#####You need to adjust Z=0 in the display printer setting so that there is bigger space between the nozzle and the bed. The place should be enough for your mod/switch to fit in between.
######(As we all know, when the nozzle touches the sticky plate, there is a short and and electricity passes through. That way the printer senses the plate at the bottom. Please note the printer only sends electricity when it is about to touch the plate. So when the nozzle is near Z=0. It then starts to move very slowly. You can also see that in this video at 0:41 as well. It goes pretty fast and then slowly while being ready to send electricity when there is a short. Problem is, with that mod, the switch is too big and touches the plate before the nozzle itself gets close enough to the plate. So the printer is never sending any electricity and it doesn't matter if your switch makes a short or not.)
https://youtu.be/JjT5ktiIY2o
3Deddy
