Optical Z-endstop bracket (HC-89) for Ender 3
thingiverse
Replace the stock mechanical Z endstop with a fancier optical one. This bracket is ideal for an HC-89 optical endstop board, and you can easily find it on eBay at a low cost. You need to change your firmware by following these steps: - Disable the pullup on Z only Enable pullups for all endstops to prevent floating states. #define ENDSTOPPULLUPS #if DISABLED(ENDSTOPPULLUPS) Disable ENDSTOPPULLUPS to set pullups individually #define ENDSTOPPULLUP_XMAX #define ENDSTOPPULLUP_YMAX //#define ENDSTOPPULLUP_ZMAX #define ENDSTOPPULLUP_XMIN #define ENDSTOPPULLUP_YMIN //#define ENDSTOPPULLUP_ZMIN //#define ENDSTOPPULLUP_ZMIN_PROBE #endif - Invert the min Z endstop logic level #define Z_MIN_ENDSTOP_INVERTING true
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