Step 13.20 — Z endstop (the LDO nozzle probe) by hand¶
Step 20 of 54 with a helper · Chapter 13 — Initial startup
Parts: none.
Do: Press the nozzle probe's sliding shaft down with a finger until the D2F switch clicks, hold, and send QUERY_ENDSTOPS.
Send: QUERY_ENDSTOPS
Recv: // stepper_x:open stepper_y:open stepper_z:TRIGGERED
Check
Only stepper_z changes, and the shaft springs back up freely to read open again.
Helper Sends QUERY_ENDSTOPS while the adult holds the probe shaft down, then reads the reply aloud.
What you're looking at
The photo is the LDO nozzle probe installed: a sprung 5 mm shaft beside the bed with a D2F microswitch under it. The nozzle presses that shaft at the end of every Z homing move, so this part, not the inductive probe, defines Z=0.
Tip
if the shaft is sticky, back off the probe body's set screw a quarter turn. That screw only stops the shaft falling out; it must not grip it.
Source: LDO wiring photo z_stop_final.jpg · LDO wiring guide § Assembling the nozzle probe · Voron startup wizard § Endstop check
