Marlin causes probing to fail when a ZMAX sensor is installed and enabled along with a touch sensor.

[Poikilos]

This appears to be fixed in bugfix-2.1.x:

• https://github.com/MarlinFirmware/Marlin/issues/10390

• [ ] Test in Marlin bugfix-2.1.x branch and report issue to Marlin if it still occurs.

Examples:

• Auto Bed leveling sensor and z-min endstop at the same time
• Dual Z Max and Probe for Z Min: I changed it to single ZMAX and it compiled but didn't work (probing always fails)
• Configuring SKR2 for CoreXY with Z-Probe in Version 2
  • [ ] See if anyone answers my question there about Configuration_io.h
• Possible to use both Z-stop connected to switch and BLTouch in probe?
  • [ ] Re-test with configuration settings provided there.

Related logic:

• The ZMIN ports on the BTT SKR V1.4 Turbo are used even if you comment all USE...MIN defines and define all USE...MAX defines: https://github.com/poikilos/marlininfo/commit/a884ae7e02935524188f93bc03cf748263a90c98

Non-Marlin examples:

• Cartesian - Z-endstop & homing (Max or Min)?

[Poikilos]

Not working in bugfix-2.1.x with:

#define USE_ZMIN_PLUG
#define USE_ZMAX_PLUG
#define Z_HOME_DIR -1

[Poikilos]

See https://github.com/MarlinFirmware/Marlin/issues/25401 for more info.