# Plot difference between two axis positions

**URL:** <https://forum.deltamotion.com/t/plot-difference-between-two-axis-positions/878>\
**Category:** RMCTools\
**Created:** [March 23, 2021, 8:36pm UTC](https://forum.deltamotion.com/t/plot-difference-between-two-axis-positions/878 "2021-03-23T20:36:57Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**Author:** ![Paul\_Huumala](https://forum.deltamotion.com/letter_avatar_proxy/v4/letter/p/22d042/32.png) [@Paul\_Huumala](https://forum.deltamotion.com/u/Paul_Huumala)\
**Post date:** [March 23, 2021, 9:05pm UTC](https://forum.deltamotion.com/t/plot-difference-between-two-axis-positions/878/2 "2021-03-23T21:05:53Z")

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Hi Charlie,

Thanks for posting on our forum.

You will need to the calculation in a user program. Our Plot Template formulas do not support differences. Below is an example of the user program that can calculate the difference. The ABS will ensure the difference is always positive.

![image](https://forum.deltamotion.com/uploads/default/original/1X/540918c8c4c324a38a868dc9627cb39734066c3a.png)

I’d also recommend viewing this topic: [Make a user program always run](https://forum.deltamotion.com/t/make-a-user-program-always-run/436)

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