# Calculating RobTargets - How to calculate the value of eax\_a, eax\_b...eax\_f

**URL:** <https://tech-community.robotics.abb.com/t/calculating-robtargets-how-to-calculate-the-value-of-eax-a-eax-b-eax-f/10130>\
**Category:** RobotStudio\
**Created:** [April 21, 2021, 6:25pm UTC](https://tech-community.robotics.abb.com/t/calculating-robtargets-how-to-calculate-the-value-of-eax-a-eax-b-eax-f/10130 "2021-04-21T18:25:48Z")\
**Posts on this page:** 5\
**Page:** 1

<div class="post-metadata">

**Author:** ![zin96](https://avatars.discourse-cdn.com/v4/letter/z/c2a13f/32.png) [@zin96](https://tech-community.robotics.abb.com/u/zin96)\
**Post date:** [April 21, 2021, 6:25pm UTC](https://tech-community.robotics.abb.com/t/calculating-robtargets-how-to-calculate-the-value-of-eax-a-eax-b-eax-f/10130/1 "2021-04-21T18:25:48Z")

</div>

Hi everyone ,  
now, i get a problem like this. When im working with ABB rapid code, i see the eax\_f=0 (not 9E+9 as usually ). But when i change it back the default value. it doesn’t change.  
plz tell me the purpose of the coder and if i change it back the default value, what would happen ?

---

<div class="post-metadata">

**Author:** ![zin96](https://avatars.discourse-cdn.com/v4/letter/z/c2a13f/32.png) [@zin96](https://tech-community.robotics.abb.com/u/zin96)\
**Post date:** [April 21, 2021, 6:30pm UTC](https://tech-community.robotics.abb.com/t/calculating-robtargets-how-to-calculate-the-value-of-eax-a-eax-b-eax-f/10130/2 "2021-04-21T18:30:17Z")

</div>

“it doesn’t change” i mean the position of robtarget that i modified doesn’t change !

---

<div class="post-metadata">

**Author:** ![lemster68](https://dub1.discourse-cdn.com/flex005/user_avatar/tech-community.robotics.abb.com/lemster68/32/1945_2.png) [@lemster68](https://tech-community.robotics.abb.com/u/lemster68)\
**Post date:** [April 21, 2021, 6:31pm UTC](https://tech-community.robotics.abb.com/t/calculating-robtargets-how-to-calculate-the-value-of-eax-a-eax-b-eax-f/10130/3 "2021-04-21T18:31:19Z")

</div>

9E+09 just means null value, not used, ignore it. The system either has no external axis, or it was not active at the time of modification.

---

<div class="post-metadata">

**Author:** ![zin96](https://avatars.discourse-cdn.com/v4/letter/z/c2a13f/32.png) [@zin96](https://tech-community.robotics.abb.com/u/zin96)\
**Post date:** [April 22, 2021, 4:46pm UTC](https://tech-community.robotics.abb.com/t/calculating-robtargets-how-to-calculate-the-value-of-eax-a-eax-b-eax-f/10130/4 "2021-04-22T16:46:01Z")

</div>

> [@lemster68](#):
>
> 9E+09 just means null value, not used, ignore it. The system either has no external axis, or it was not active at the time of modification.

thanks, can i ask one more question  
when i run into the command “actunit CNV”. the value of eax\_f of the point i modify is always “0”  
i know that when the additional axis is active, its value will be not 9E+9. But why the value is “0”, what dose “0” means, and how can i change the value “0” into the different number

---

<div class="post-metadata">

**Author:** ![lemster68](https://dub1.discourse-cdn.com/flex005/user_avatar/tech-community.robotics.abb.com/lemster68/32/1945_2.png) [@lemster68](https://tech-community.robotics.abb.com/u/lemster68)\
**Post date:** [April 22, 2021, 5:21pm UTC](https://tech-community.robotics.abb.com/t/calculating-robtargets-how-to-calculate-the-value-of-eax-a-eax-b-eax-f/10130/5 "2021-04-22T17:21:40Z")

</div>

0 means 0 mm from its zero position if linear joint, or 0 degrees if it is a rotating joint, if you want it to be non-zero, you must jog it.