# Z-20 Offsets from original for fixture 'recalibration'

**URL:** <https://forum.onefinitycnc.com/t/z-20-offsets-from-original-for-fixture-recalibration/22881>\
**Category:** Wasteboard\
**Created:** [October 20, 2023, 6:25pm UTC](https://forum.onefinitycnc.com/t/z-20-offsets-from-original-for-fixture-recalibration/22881 "2023-10-20T18:25:05Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**Author:** ![349iq2345](https://avatars.discourse-cdn.com/v4/letter/3/bb73d2/32.png) [@349iq2345](https://forum.onefinitycnc.com/u/349iq2345)\
**Post date:** [October 20, 2023, 8:21pm UTC](https://forum.onefinitycnc.com/t/z-20-offsets-from-original-for-fixture-recalibration/22881/2 "2023-10-20T20:21:25Z")

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Hey Tyler,

> [@unfinishedDesigns](#):
>
> I need to ‘recalibrate’ my CAM setup for these fixtures and jigs now that I have upgraded to a Z-20 spindle carrier. What is the distance the centerline of the spindle is shifted forward when moving from the standard spindle carrier with 80mm spindle to the Z-20 carrier with 80mm spindle?

This forum already has recorded the difference between Z-16 65 mm stock router/spindle mount and Z-16 [80 mm spindle mount](https://www.onefinitycnc.com/product-page/80mm-spindle-mount):

> [@New Makita router (RT702C)?](https://forum.onefinitycnc.com/t/new-makita-router-rt702c/10951/38):
>
> > [@Cutting area location](https://forum.onefinitycnc.com/t/cutting-area-location/1586/17):
> >
> > ![image](https://us1.discourse-cdn.com/flex022/uploads/onefinitycnc/original/3X/0/5/0528955ecc108862c5ae6d6d69f65ce526a0cda1.jpeg)
> > 
> > ![image](https://us1.discourse-cdn.com/flex022/uploads/onefinitycnc/original/3X/b/d/bd0a61d6e54025745a5bb15d925bd9d4fa901705.jpeg)
> > 
> > ![image](https://us1.discourse-cdn.com/flex022/uploads/onefinitycnc/original/3X/b/b/bb36c9eb21fd8f7c02f0f4add97f26b6e674162b.png)
> 
> And if you upgrade to [Z-20 heavy Z assembly](https://www.onefinitycnc.com/product-page/z-20-heavy-duty-z-slider), with **both** 65 mm and 80 mm mounts the milling motor clears the stepper cage (the 65 mm and 80 mm mounts for Z-20 Z assembly are **not identical** to those of Original Z-16 Z assembly!)

To my knowledge the measurement you request is not known. If you measure it, posting it on the forum will surely be appreciated.

As usual, the measurement is lacking on

- [Z-20 vs. Z-16 Z Slider Physical Differences](https://forum.onefinitycnc.com/t/z-20-vs-z-16-z-slider-physical-differences/22370)

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