# Waste Board flattening - gone wrong. But why? (Solved, needs trammed) **URL:** \ **Category:** Wasteboard\ **Created:** [July 24, 2023, 4:39pm UTC](https://forum.onefinitycnc.com/t/waste-board-flattening-gone-wrong-but-why-solved-needs-trammed/21579 "2023-07-24T16:39:54Z")\ **Posts on this page:** 4\ **Page:** 1
**Author:** ![pasge](https://avatars.discourse-cdn.com/v4/letter/p/c2a13f/32.png) [@pasge](https://forum.onefinitycnc.com/u/pasge)\ **Post date:** [July 24, 2023, 4:39pm UTC](https://forum.onefinitycnc.com/t/waste-board-flattening-gone-wrong-but-why-solved-needs-trammed/21579/1 "2023-07-24T16:39:54Z")
Hi everyone, after assembling my Journeyman 3 month ago i finally had the time to get back at it again. I screwed on a waste board and designed a flattening toolpath in Fusion360. After some trouble there (surfacing toolpath didn’t work because the path always started outside of the possible moving area of the machine) i finally found a way by using the pocket toolpath to do the job and stay within the margins. The tool path starts in the middle and works its way out. milling 0.5mm. so far, so good. the milling started in the middle and the result looked great but the more the machine came to the outer boarder, the more i started seeing and feeling grooves all around the piece. As if the router was slightly tilted backwards. but the the middle of the waste board doesn’t have any grooves at all. just the outer 20-30cm. ![IMG_7269.HEIC](https://us1.discourse-cdn.com/flex022/uploads/onefinitycnc/original/3X/d/6/d6ad8a4bfed3890b344b568f46928f774b324406.jpeg) ![IMG_7267.HEIC](https://us1.discourse-cdn.com/flex022/uploads/onefinitycnc/original/3X/a/4/a488283535c6a55948817458c964030e0ae4a3f9.jpeg) Has anyone experienced the same thing? Why might this be happening? Very grateful for your help! ---
**Author:** ![OnefinityCNC](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.onefinitycnc.com/onefinitycnc/32/7_2.png) [@OnefinityCNC](https://forum.onefinitycnc.com/u/OnefinityCNC)\ **Post date:** [July 24, 2023, 4:53pm UTC](https://forum.onefinitycnc.com/t/waste-board-flattening-gone-wrong-but-why-solved-needs-trammed/21579/3 "2023-07-24T16:53:45Z")
ballscrew isn’t an issue. This is something called ‘tram’ or ‘tramming’ and has been talked about extensively on the forums here: > [@Tramming - Front To Back](https://forum.onefinitycnc.com/t/tramming-front-to-back/8421): > > There are a few methods to tram your machine. Loosening some z mount bolts, using 123 blocks, tram arms, folded pieces of tin foil, are all methods that can have acceptable outcomes. Left to right tram is relatively easy to correct. Front to back is a bit harder. There is a unique benefit of buying a Onefinity CNC machine is that every Onefinity machine has built in front to back tramming bolts on the X axis. These allow for tilt of the z slider front to back. There are 4 bolts on each foo… and [https://forum.onefinitycnc.com/search?q=tram](https://forum.onefinitycnc.com/search?q=tram) and: [https://forum.onefinitycnc.com/search?q=tramming](https://forum.onefinitycnc.com/search?q=tramming) ---
**Author:** ![pasge](https://avatars.discourse-cdn.com/v4/letter/p/c2a13f/32.png) [@pasge](https://forum.onefinitycnc.com/u/pasge)\ **Post date:** [July 24, 2023, 5:52pm UTC](https://forum.onefinitycnc.com/t/waste-board-flattening-gone-wrong-but-why-solved-needs-trammed/21579/4 "2023-07-24T17:52:09Z")
perfect! thanks a lot! ---
**Author:** ![cyberreefguru](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.onefinitycnc.com/cyberreefguru/32/27385_2.png) [@cyberreefguru](https://forum.onefinitycnc.com/u/cyberreefguru)\ **Post date:** [July 26, 2023, 1:24am UTC](https://forum.onefinitycnc.com/t/waste-board-flattening-gone-wrong-but-why-solved-needs-trammed/21579/6 "2023-07-26T01:24:30Z")
In this case, it looks like you need to adjust your z gantry front to back rather than side to side. You can use the tramming bolts or shim the sindle/router. Best of luck! -Tom