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I installed TH3D to my stock mainboard via this guide, but BLTouch does not work properly.

It does not check all 9 points before point it just go middle then check z then start printing. BLTouch normally needs to check all 9 points before printing or with autobedleveling but somehow mine do not work like this.

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  • $\begingroup$ Hi, welcome to 3DPrinting.SE! Did you insert G29 in your start G-code script? $\endgroup$ – 0scar Jun 12 at 22:31
  • $\begingroup$ Hey, yes after a while I understand it and find a gcode that is suitable for ender 3 and bltouch now it seems working fine. Ty for your respond :) $\endgroup$ – Burak0015 Jun 12 at 23:30
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After setting up the BLTouch in firmware, you need to activate the leveling function for every print by inserting the leveling G-code 'G29' in the start G-code script of your slicer. The code should be placed directly after command G28.

Note that you can test the working of the sensor from the printer display: sensor can be deployed, stowed, reset and tested.

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