ABL with capacitive sensor

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el3ment
Posts: 1
Joined: Mon Jan 20, 2020 8:53 pm

ABL with capacitive sensor

Post by el3ment » Tue Jan 21, 2020 2:20 am

Hey folks.
Today I wanted to add auto bed leveling to my i3 pro b. I have bought a capacitive PNP sensor from amazon and plugged the cables from the sensor into the plugs of the z-min endstop. I changed my Marlin firmware accordingly to the setup I got. I used following mount for my sensor from thingiverse :https://www.thingiverse.com/thing:1540434 and added the offsets for the x- and y axis and set the offset for the z-axis to zero.
When I am homing my printer, the sensor triggers as soon as it recognizes the heatbed and the movement of the z-axis stops immediately.
I measured the distance between the nozzle and the heatbed and edited the z-offset in the Marlin firmware accordingly.
As far as I am understanding the whole process of ABL (this is my first 3d-printer, basically I am a novice) my printer now should know that it can move the z-axis down after the sensor triggers by the given z-offset to eliminate any unevenness of the heatbed, but my printer is letting me down.
No matter what I set as z-offset, the movement in the z-axis stops as soon as the sensor triggers and my nozzle is approximately 2.5mm above my heatbed.
Does any of u guys have an idea what could be wrong in my configuration? Did not know how to upload my config (already said it, I am a novice in this forum) so I used a filesharer: https://filebin.net/36eayr15d3v76ry6

Cheers

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William
Site Admin
Posts: 5121
Joined: Tue Jun 07, 2016 9:38 am

Re: ABL with capacitive sensor

Post by William » Tue Jan 21, 2020 9:16 am

:D Hi, You can try to download the corresponding pro b firmware with 3d touch here,
viewtopic.php?f=20&t=17046


Then remove the limit switch on the z axis,
Can refer to this:
https://www.youtube.com/watch?v=_RtsZDbR2po
Set the offset.
-Keep your mind and try to test it. :)
-Everything will be fun!-Support all Getech printer.
-You can ask me the questions and I will kindly reply.
-Respect others is the best way you can get help!

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