# How do I use z-probe with bCNC? **URL:** \ **Category:** X-Carve\ **Created:** [December 13, 2018, 12:52am UTC](https://community.inventables.com/t/how-do-i-use-z-probe-with-bcnc/65487 "2018-12-13T00:52:31Z")\ **Posts on this page:** 10\ **Page:** 1
**Author:** ![AnthonyKim](https://yyz1.discourse-cdn.com/flex009/user_avatar/community.inventables.com/anthonykim/32/34640_2.png) [@AnthonyKim](https://community.inventables.com/u/AnthonyKim)\ **Post date:** [December 13, 2018, 12:52am UTC](https://community.inventables.com/t/how-do-i-use-z-probe-with-bcnc/65487/1 "2018-12-13T00:52:31Z")
O gods of xcarve!, plz teach me in the ways of using z-probe with bCNC as if I was a dolphin. LOL Thanks! ---
**Author:** ![NeilFerreri1](https://yyz1.discourse-cdn.com/flex009/user_avatar/community.inventables.com/neilferreri1/32/84403_2.png) [@NeilFerreri1](https://community.inventables.com/u/NeilFerreri1)\ **Post date:** [December 13, 2018, 1:23am UTC](https://community.inventables.com/t/how-do-i-use-z-probe-with-bcnc/65487/2 "2018-12-13T01:23:38Z")
What are you having trouble with? I think the easiest way for a simple Z-probe in bCNC is to use one of the user configurable buttons. Something like this for a basic probe: `G21 ;mm mode` `G91 ;relative motion` `G38.2 Z-30 F100 ;Probe Z down 30mm at feed of 100mm/min` `G10L20Z12.7 ;set Work Z to 12.7mm (thickness of probe plate)` `G0 Z20 ;lift Z 20mm to remove probe plate` `G90 ;absolute mode` I usually use a double tap for probing. P.S. I don’t have an X-Carve (pretend expert) ---
**Author:** ![LarryM](https://yyz1.discourse-cdn.com/flex009/user_avatar/community.inventables.com/larrym/32/51450_2.png) [@LarryM](https://community.inventables.com/u/LarryM)\ **Post date:** [December 13, 2018, 2:21am UTC](https://community.inventables.com/t/how-do-i-use-z-probe-with-bcnc/65487/3 "2018-12-13T02:21:12Z")
> [@NeilFerreri1](#): > > P.S. I don’t have an X-Carve (pretend expert) Well… You pretend pretty damn good. ---
**Author:** ![BlueLocktite](https://yyz1.discourse-cdn.com/flex009/user_avatar/community.inventables.com/bluelocktite/32/68346_2.png) [@BlueLocktite](https://community.inventables.com/u/BlueLocktite)\ **Post date:** [December 13, 2018, 1:31pm UTC](https://community.inventables.com/t/how-do-i-use-z-probe-with-bcnc/65487/5 "2018-12-13T13:31:10Z")
I have been meaning to set up a probe on my Raspberry Pi CNC Controller. Thanks Neil… maybe I will actually do it ---
**Author:** ![BlueLocktite](https://yyz1.discourse-cdn.com/flex009/user_avatar/community.inventables.com/bluelocktite/32/68346_2.png) [@BlueLocktite](https://community.inventables.com/u/BlueLocktite)\ **Post date:** [December 13, 2018, 3:21pm UTC](https://community.inventables.com/t/how-do-i-use-z-probe-with-bcnc/65487/6 "2018-12-13T15:21:50Z")
Neil, How do you program those buttons? could you give a quick run down please? ---
**Author:** ![NeilFerreri1](https://yyz1.discourse-cdn.com/flex009/user_avatar/community.inventables.com/neilferreri1/32/84403_2.png) [@NeilFerreri1](https://community.inventables.com/u/NeilFerreri1)\ **Post date:** [December 13, 2018, 3:50pm UTC](https://community.inventables.com/t/how-do-i-use-z-probe-with-bcnc/65487/7 "2018-12-13T15:50:53Z")
I don’t have bCNC on my PC at work, so I can’t say 100%, but I think you just right-click on them and add your macro. @BlueLocktite EDIT: Didn’t realize bCNC has a beta for a downloadable .exe…here’s a screen capture: ---
**Author:** ![BlueLocktite](https://yyz1.discourse-cdn.com/flex009/user_avatar/community.inventables.com/bluelocktite/32/68346_2.png) [@BlueLocktite](https://community.inventables.com/u/BlueLocktite)\ **Post date:** [December 13, 2018, 7:18pm UTC](https://community.inventables.com/t/how-do-i-use-z-probe-with-bcnc/65487/8 "2018-12-13T19:18:42Z")
Thanks Neil. Just did a test on it and worked great. ---
**Author:** ![AnthonyKim](https://yyz1.discourse-cdn.com/flex009/user_avatar/community.inventables.com/anthonykim/32/34640_2.png) [@AnthonyKim](https://community.inventables.com/u/AnthonyKim)\ **Post date:** [December 13, 2018, 7:19pm UTC](https://community.inventables.com/t/how-do-i-use-z-probe-with-bcnc/65487/9 "2018-12-13T19:19:29Z")
Thanks Neil, I’ll need to study your comments before figuring out what it means but awsome! Wow with movie and everything!! ---
**Author:** ![JoeStef](https://avatars.discourse-cdn.com/v4/letter/j/edb3f5/32.png) [@JoeStef](https://community.inventables.com/u/JoeStef)\ **Post date:** [March 21, 2020, 8:02pm UTC](https://community.inventables.com/t/how-do-i-use-z-probe-with-bcnc/65487/10 "2020-03-21T20:02:44Z")
I am gcode illiterate… I don’t use metric, my puck is .789 inches tall. I just tried in bcnc and crashed bit into puck by using the probe command in bcnc. What should I be doing and what should I make settings. I am new to cnc and bcnc. Hope someone can help can I customize one of the buttons and write in inches: g20 g38.2 z-.5 f4 g92 z-.789 g91 g0 z.5 Joe ---
**Author:** ![JoeStef](https://avatars.discourse-cdn.com/v4/letter/j/edb3f5/32.png) [@JoeStef](https://community.inventables.com/u/JoeStef)\ **Post date:** [March 23, 2020, 9:24pm UTC](https://community.inventables.com/t/how-do-i-use-z-probe-with-bcnc/65487/11 "2020-03-23T21:24:41Z")
I tried it and it worked, but did + .789, not neg