# From this to this? Different results for same operation overnight, what gives? **URL:** \ **Category:** Uncategorized\ **Created:** [October 25, 2016, 3:49pm UTC](https://community.inventables.com/t/from-this-to-this-different-results-for-same-operation-overnight-what-gives/29305 "2016-10-25T15:49:18Z")\ **Posts on this page:** 8\ **Page:** 1
**Author:** ![KurtBartels](https://yyz1.discourse-cdn.com/flex009/user_avatar/community.inventables.com/kurtbartels/32/24490_2.png) [@KurtBartels](https://community.inventables.com/u/KurtBartels)\ **Post date:** [October 25, 2016, 3:49pm UTC](https://community.inventables.com/t/from-this-to-this-different-results-for-same-operation-overnight-what-gives/29305/1 "2016-10-25T15:49:18Z")
SO as it says, I cut this top one last night, got up and started the machine set another cap in my jig in the exact same place and got this messed up result. How is this possible? I regularly check the belts and they are not bad. ![](https://canada1.discourse-cdn.com/flex009/uploads/inventables/original/3X/c/a/ca8d0955bc870e2e44ad393bd8f1cf4646b68f5d.jpg) ![](https://canada1.discourse-cdn.com/flex009/uploads/inventables/original/3X/8/1/81703da033e2ad2d374928b55ec4ddc6d0838659.jpg) ---
**Author:** ![StevePrior](https://yyz1.discourse-cdn.com/flex009/user_avatar/community.inventables.com/steveprior/32/72940_2.png) [@StevePrior](https://community.inventables.com/u/StevePrior)\ **Post date:** [October 25, 2016, 6:02pm UTC](https://community.inventables.com/t/from-this-to-this-different-results-for-same-operation-overnight-what-gives/29305/2 "2016-10-25T18:02:43Z")
I’m guessing the grub screws on your pulleys shook loose. ---
**Author:** ![AllenMassey](https://yyz1.discourse-cdn.com/flex009/user_avatar/community.inventables.com/allenmassey/32/84441_2.png) [@AllenMassey](https://community.inventables.com/u/AllenMassey)\ **Post date:** [October 25, 2016, 6:10pm UTC](https://community.inventables.com/t/from-this-to-this-different-results-for-same-operation-overnight-what-gives/29305/3 "2016-10-25T18:10:24Z")
The edges on the second one look smooth and regular, so it is not the typical belt slip or other mechanical issue. It almost looks like the size of the bit changed. ---
**Author:** ![NerijusZut](https://yyz1.discourse-cdn.com/flex009/user_avatar/community.inventables.com/nerijuszut/32/67309_2.png) [@NerijusZut](https://community.inventables.com/u/NerijusZut)\ **Post date:** [October 25, 2016, 6:36pm UTC](https://community.inventables.com/t/from-this-to-this-different-results-for-same-operation-overnight-what-gives/29305/4 "2016-10-25T18:36:55Z")
Yes I thought the same because the cut is too accurate for some kind of backslash. I think some kind of easel bug changed your outline from inside to on path or outside. ---
**Author:** ![AllenMassey](https://yyz1.discourse-cdn.com/flex009/user_avatar/community.inventables.com/allenmassey/32/84441_2.png) [@AllenMassey](https://community.inventables.com/u/AllenMassey)\ **Post date:** [October 25, 2016, 6:41pm UTC](https://community.inventables.com/t/from-this-to-this-different-results-for-same-operation-overnight-what-gives/29305/5 "2016-10-25T18:41:24Z")
Or … if the bit size did not change, then the toolpath changed from an inside cut to an outside cut. ---
**Author:** ![KurtBartels](https://yyz1.discourse-cdn.com/flex009/user_avatar/community.inventables.com/kurtbartels/32/24490_2.png) [@KurtBartels](https://community.inventables.com/u/KurtBartels)\ **Post date:** [October 25, 2016, 8:50pm UTC](https://community.inventables.com/t/from-this-to-this-different-results-for-same-operation-overnight-what-gives/29305/6 "2016-10-25T20:50:24Z")
Thank you for your replies. I dont think the belts or screws loosened overnight. I noticed the 2nd design is slightly elongated and the S is smaller so I checked to see if the cut had changed from inner to outer or center but did not seem to. I just redid the drawing and made it work, but that was strange. ---
**Author:** ![SeanKeplinger](https://yyz1.discourse-cdn.com/flex009/user_avatar/community.inventables.com/seankeplinger/32/82073_2.png) [@SeanKeplinger](https://community.inventables.com/u/SeanKeplinger)\ **Post date:** [October 27, 2016, 10:25am UTC](https://community.inventables.com/t/from-this-to-this-different-results-for-same-operation-overnight-what-gives/29305/7 "2016-10-27T10:25:22Z")
It looks like an inside cut versus an outside cut. ---
**Author:** ![NerijusZut](https://yyz1.discourse-cdn.com/flex009/user_avatar/community.inventables.com/nerijuszut/32/67309_2.png) [@NerijusZut](https://community.inventables.com/u/NerijusZut)\ **Post date:** [November 19, 2016, 8:20am UTC](https://community.inventables.com/t/from-this-to-this-different-results-for-same-operation-overnight-what-gives/29305/8 "2016-11-19T08:20:22Z")
That’s why I use fusion 360 🙂 Export G-code once and use it multi times 😉