# Using EX controller - after resurfacing spoilboard, is it just one measurement to adjust MTC data?

**URL:** <https://forum.avidcnc.com/t/using-ex-controller-after-resurfacing-spoilboard-is-it-just-one-measurement-to-adjust-mtc-data/5826>\
**Category:** General Chat\
**Created:** [February 26, 2026, 8:38pm UTC](https://forum.avidcnc.com/t/using-ex-controller-after-resurfacing-spoilboard-is-it-just-one-measurement-to-adjust-mtc-data/5826 "2026-02-26T20:38:58Z")\
**Posts on this page:** 4\
**Page:** 1

<div class="post-metadata">

**Author:** ![scpinkerton](https://avatars.discourse-cdn.com/v4/letter/s/b9e5f3/32.png) [@scpinkerton](https://forum.avidcnc.com/u/scpinkerton)\
**Post date:** [February 26, 2026, 8:38pm UTC](https://forum.avidcnc.com/t/using-ex-controller-after-resurfacing-spoilboard-is-it-just-one-measurement-to-adjust-mtc-data/5826/1 "2026-02-26T20:38:58Z")

</div>

I’m finishing up my EX controller upgrade (along with servos and AV40S). I had added all of my bits using the MTC utility (which did the tool length measurement on all the bits). Well now I have surfaced the spoilboard. Do I just go back into the Utils menu and do a one time “Calibrate work surface location”, and I’m done ? That one step covers all the tools that I had measured ? Do that and things are magically back in sync ? Or is it even required at all if I tend to use a touch plate and work off the top of the work surface ?

Thanks for any and all advice.

-scott

---

<div class="post-metadata">

**Author:** ![Eric](https://yyz1.discourse-cdn.com/flex027/user_avatar/forum.avidcnc.com/eric/32/3220_2.png) [@Eric](https://forum.avidcnc.com/u/Eric)\
**Post date:** [February 26, 2026, 8:44pm UTC](https://forum.avidcnc.com/t/using-ex-controller-after-resurfacing-spoilboard-is-it-just-one-measurement-to-adjust-mtc-data/5826/2 "2026-02-26T20:44:01Z")

</div>

> [@scpinkerton](#):
>
> Do I just go back into the Utils menu and do a one time “Calibrate work surface location”, and I’m done ?

Yes, every time you surface your spoilboard you need to run this utility

> [@scpinkerton](#):
>
> I had added all of my bits using the MTC utility (which did the tool length measurement on all the bits).

You actually don’t have to do this. Every time you insert a new tool it’s measured off of the tool height setter, we actually don’t store the lenghts on tools. We will on our new software update/ATC system that’s coming later this year

---

<div class="post-metadata">

**Author:** ![scpinkerton](https://avatars.discourse-cdn.com/v4/letter/s/b9e5f3/32.png) [@scpinkerton](https://forum.avidcnc.com/u/scpinkerton)\
**Post date:** [February 27, 2026, 12:24pm UTC](https://forum.avidcnc.com/t/using-ex-controller-after-resurfacing-spoilboard-is-it-just-one-measurement-to-adjust-mtc-data/5826/3 "2026-02-27T12:24:56Z")

</div>

Good to know.

Hmmm, relative to saving the tool length - does it save the length of the last tool used ? I was using my slab flattening bit for days on end while I was adjusting for tilt and nod. Each day (numerous power cycles) - it always said - tool 40 length measured. As in it remembered it.

But as always - thank you for your words of wisdom !!

-scott

---

<div class="post-metadata">

**Author:** ![Eric](https://yyz1.discourse-cdn.com/flex027/user_avatar/forum.avidcnc.com/eric/32/3220_2.png) [@Eric](https://forum.avidcnc.com/u/Eric)\
**Post date:** [February 27, 2026, 1:37pm UTC](https://forum.avidcnc.com/t/using-ex-controller-after-resurfacing-spoilboard-is-it-just-one-measurement-to-adjust-mtc-data/5826/4 "2026-02-27T13:37:26Z")

</div>

> [@scpinkerton](#):
>
> Hmmm, relative to saving the tool length - does it save the length of the last tool used ?

yes, whatever tool that is in the spindle has it’s length stored until you change it (even through power cycles)