# How to change probing speed

**URL:** <https://forum.sovol3d.com/t/how-to-change-probing-speed/9221>\
**Category:** Sovol SV06 ACE\
**Created:** [December 16, 2025, 8:34am UTC](https://forum.sovol3d.com/t/how-to-change-probing-speed/9221 "2025-12-16T08:34:01Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![bruno](https://yyz2.discourse-cdn.com/flex030/user_avatar/forum.sovol3d.com/bruno/32/1372_2.png) [@bruno](https://forum.sovol3d.com/u/bruno)\
**Post date:** [December 16, 2025, 8:34am UTC](https://forum.sovol3d.com/t/how-to-change-probing-speed/9221/1 "2025-12-16T08:34:01Z")

</div>

I played around with `PROBE_ACCURACY` and found that reducing the speed from 3 to 2 improves the accuracy significantly. So I am wondering how I can change the default speed used for probing on the SV06 ACE

---

<div class="post-metadata">

**Author:** ![cardoc](https://avatars.discourse-cdn.com/v4/letter/c/ec9cab/32.png) [@cardoc](https://forum.sovol3d.com/u/cardoc)\
**Post date:** [December 16, 2025, 8:56pm UTC](https://forum.sovol3d.com/t/how-to-change-probing-speed/9221/2 "2025-12-16T20:56:20Z")

</div>

The PROBE on the SV06(+) is of the [smart\_effector] type:

```auto
[hx711]
sclk_pin: extra_mcu:PB13
dout_pin: extra_mcu:PB15
single_pin: extra_mcu:PB5
hx711_diff: 0.01 #Trigger sensitivity, the smaller the value, the easier it is to trigger

[smart_effector]
pin: !extra_mcu:PB6
z_offset: -0.15
recovery_time: 0.8
x_offset: 0
y_offset: 0
speed: 3
probe_accel: 10
samples: 2
samples_result: average
sample_retract_dist: 2.0
samples_tolerance: 0.03
samples_tolerance_retries: 10

```

I included Sovol’s proprietary [hx711] because that section creates the virtual pin extra\_mcu:PB13.

The speed setting is in mm/s and could include a decimal like 2.25

If you want to tune for ultimate precision you could adjust the hx711\_diff and z\_offset at the lower speeds. The first is how hard the nozzle presses into the bed and the second is how far past the ideal the Z motors are at, at that force.