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The Endstops Tab defines what type of endstop switch is being used, and whether its located on the Low End or High End of the printer axis.

It also defines the Z Probe. The stock Ender 3 does not come with a Z probe by default, however we went through the process of adding a BLTouch in part 1 of this guide.

The Ender 3 Pro uses Active high (NC) switches and trigger at the low end of travel (X0, Y0, Z0)

For X and Y, choose switch and low end. To choose the probe for the Z axis, we must first select BLTouch below, and then Z-Probe for the Z axis, also low end.

If you already know the probe X and Y offset and trigger height add it now. Calibration of the probe offsets will happen in the next guide.

In a later guide we will manually edit the config.g to add the Z axis endstop as a Z Max endstop.

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