# Pattern Registration for Double-Sided Milling **URL:** \ **Category:** CAM\ **Created:** [January 14, 2021, 1:37am UTC](https://forum.grid.space/t/pattern-registration-for-double-sided-milling/239 "2021-01-14T01:37:46Z")\ **Posts on this page:** 10\ **Page:** 1
**Author:** ![stewart](https://forum.grid.space/user_avatar/forum.grid.space/stewart/32/21_2.png) [@stewart](https://forum.grid.space/u/stewart)\ **Post date:** [January 14, 2021, 1:37am UTC](https://forum.grid.space/t/pattern-registration-for-double-sided-milling/239/1 "2021-01-14T01:37:46Z")
Based on a [link](https://youtu.be/BLD4dFoXC7o?t=360) @Bruce sent to me showing a clever way to do double-sided milling, I incorporated the feature into Kiri:Moto’s registration operation. Take a look at the video to see how it works. This is live now in the 2.6 development version. [![](https://forum.grid.space/uploads/default/original/2X/5/541826bb059034ae0696453b857f08a59b639b50.jpeg "Pattern Registration for Double-Sided Milling in Kiri:Moto") ](https://www.youtube.com/watch?v=cuTEy1ChBc4) ---
**Author:** ![jsiddall](https://forum.grid.space/letter_avatar_proxy/v4/letter/j/e495f1/32.png) [@jsiddall](https://forum.grid.space/u/jsiddall)\ **Post date:** [January 14, 2021, 10:31pm UTC](https://forum.grid.space/t/pattern-registration-for-double-sided-milling/239/2 "2021-01-14T22:31:59Z")
That is clever! I presume the thickness of the steps corresponds to the diameter of the tool so you still have a tight fit after the flip? ---
**Author:** ![stewart](https://forum.grid.space/user_avatar/forum.grid.space/stewart/32/21_2.png) [@stewart](https://forum.grid.space/u/stewart)\ **Post date:** [January 14, 2021, 10:51pm UTC](https://forum.grid.space/t/pattern-registration-for-double-sided-milling/239/3 "2021-01-14T22:51:46Z")
The step size is somewhat orthogonal to the endmill size. Geometrically it works out to be a perfect fit (zero offset or overlap) if you flip it on either axis. ---
**Author:** ![pgf](https://forum.grid.space/letter_avatar_proxy/v4/letter/p/f6c823/32.png) [@pgf](https://forum.grid.space/u/pgf)\ **Post date:** [January 15, 2021, 1:48am UTC](https://forum.grid.space/t/pattern-registration-for-double-sided-milling/239/4 "2021-01-15T01:48:11Z")
Is there a way to prevent flipping it on _either_ axis? If, say, you only wanted it to ever be flipped on just one? ---
**Author:** ![stewart](https://forum.grid.space/user_avatar/forum.grid.space/stewart/32/21_2.png) [@stewart](https://forum.grid.space/u/stewart)\ **Post date:** [January 15, 2021, 1:49am UTC](https://forum.grid.space/t/pattern-registration-for-double-sided-milling/239/5 "2021-01-15T01:49:43Z")
like a system preference that hides the Y axis option? the current geometry both allows flipping on either axis, but necessarily _must_ allow this to work. ---
**Author:** ![Bruce](https://forum.grid.space/user_avatar/forum.grid.space/bruce/32/64_2.png) [@Bruce](https://forum.grid.space/u/Bruce)\ **Post date:** [January 15, 2021, 4:58pm UTC](https://forum.grid.space/t/pattern-registration-for-double-sided-milling/239/6 "2021-01-15T16:58:11Z")
Might a pattern like this be a solution for one axis flipping? ![image](https://forum.grid.space/uploads/default/original/1X/04dccfc8cf40ad968af85d7fcb22cb8300b5c9c2.png) ---
**Author:** ![stewart](https://forum.grid.space/user_avatar/forum.grid.space/stewart/32/21_2.png) [@stewart](https://forum.grid.space/u/stewart)\ **Post date:** [January 15, 2021, 5:02pm UTC](https://forum.grid.space/t/pattern-registration-for-double-sided-milling/239/7 "2021-01-15T17:02:15Z")
that would still allow flipping on either axis, but would be less secure when pressed back in place. ---
**Author:** ![Bruce](https://forum.grid.space/user_avatar/forum.grid.space/bruce/32/64_2.png) [@Bruce](https://forum.grid.space/u/Bruce)\ **Post date:** [March 18, 2021, 7:29am UTC](https://forum.grid.space/t/pattern-registration-for-double-sided-milling/239/8 "2021-03-18T07:29:53Z")
![IMG_20210315_184543](https://forum.grid.space/uploads/default/original/1X/93c893c21e9e0e8f43ac9a293dff9872ef0e8c24.jpeg) ![IMG_20210315_190558](https://forum.grid.space/uploads/default/original/1X/66dc4d8cb4abc4f14e666d687848124a03df21ce.jpeg) Thanks a lot works like a charm! ---
**Author:** ![pmc](https://forum.grid.space/letter_avatar_proxy/v4/letter/p/e9c0ed/32.png) [@pmc](https://forum.grid.space/u/pmc)\ **Post date:** [November 7, 2025, 6:31pm UTC](https://forum.grid.space/t/pattern-registration-for-double-sided-milling/239/9 "2025-11-07T18:31:45Z")
I was going to suggest the same. While it would not make it _impossible_ to flip the wrong way, the wrong flip would be obviously wrong. ---
**Author:** ![stewart](https://forum.grid.space/user_avatar/forum.grid.space/stewart/32/21_2.png) [@stewart](https://forum.grid.space/u/stewart)\ **Post date:** [November 11, 2025, 4:18am UTC](https://forum.grid.space/t/pattern-registration-for-double-sided-milling/239/10 "2025-11-11T04:18:01Z")
I added a new `axis mode` “=” to `4.4` on the dev server that notches the bottom cutout tags. then you know exactly which orientation it was cut in. just flip those tabs to the top or if you flip on Y the notches move from left to right. ![Screenshot 2025-11-10 at 11.14.43 PM](https://forum.grid.space/uploads/default/original/2X/8/8e6082613397b6d1ceb0dc3401d9f2d333da94fd.jpeg)