# Tool Change Z Probe Only

**URL:** <https://forum.onefinitycnc.com/t/tool-change-z-probe-only/9174>\
**Category:** Uncategorized\
**Created:** [November 27, 2021, 9:21pm UTC](https://forum.onefinitycnc.com/t/tool-change-z-probe-only/9174 "2021-11-27T21:21:18Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Nstgatr67CNC](https://avatars.discourse-cdn.com/v4/letter/n/59ef9b/32.png) [@Nstgatr67CNC](https://forum.onefinitycnc.com/u/Nstgatr67CNC)\
**Post date:** [November 27, 2021, 9:21pm UTC](https://forum.onefinitycnc.com/t/tool-change-z-probe-only/9174/1 "2021-11-27T21:21:18Z")

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I am sure this has been asked before, but

It is my understanding that for every tool, unless you have an automatic tool changer that yo0u need to create a new/separate NGC file. Is this correct?

Also, when I change jobs/tool since X-Y does not change, can I just probe Z assuming the material does not change or move? Or, do I need to probe all three with a new NGC file?  
Thanks,

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<div class="post-metadata">

**Author:** ![AndyP](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.onefinitycnc.com/andyp/32/1106_2.png) [@AndyP](https://forum.onefinitycnc.com/u/AndyP)\
**Post date:** [November 27, 2021, 10:19pm UTC](https://forum.onefinitycnc.com/t/tool-change-z-probe-only/9174/2 "2021-11-27T22:19:30Z")

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It is my understanding that for every tool, unless you have an automatic tool changer that yo0u need to create a new/separate NGC file. Is this correct? **YES**

Also, when I change jobs/tool since X-Y does not change, can I just probe Z assuming the material does not change or move? **YES**

Or, do I need to probe all three with a new NGC file? **NO**