# Corner geometry **URL:** \ **Category:** Troubleshooting\ **Created:** [June 29, 2019, 9:27am UTC](https://forums.maslowcnc.com/t/corner-geometry/10351 "2019-06-29T09:27:26Z")\ **Posts on this page:** 7\ **Page:** 1
**Author:** ![Oscar\_Foran](https://yyz1.discourse-cdn.com/flex031/user_avatar/forums.maslowcnc.com/oscar_foran/32/12722_2.png) [@Oscar\_Foran](https://forums.maslowcnc.com/u/Oscar_Foran)\ **Post date:** [June 29, 2019, 9:27am UTC](https://forums.maslowcnc.com/t/corner-geometry/10351/1 "2019-06-29T09:27:26Z")
![image](https://canada1.discourse-cdn.com/flex031/uploads/maslowcnc/original/2X/d/d5355024780206135858893d36b26ca12782cd03.png) Anyone got any idea what I am doing wrong here please? I have only just finished calibration on the Maslow and trying to cut a few things out this week a a tester. The letter with 4 passes works fine in Fusion 360 but looks bizarre in Ground Control, I guess I am missing some setting somewhere but it is not obvious to me what it is. Close up of the corner ![image](https://canada1.discourse-cdn.com/flex031/uploads/maslowcnc/original/2X/a/ab35d8f70fce9c631447c7fcebed254afa0b4883.png) ---
**Author:** ![bar](https://yyz1.discourse-cdn.com/flex031/user_avatar/forums.maslowcnc.com/bar/32/10_2.png) [@bar](https://forums.maslowcnc.com/u/bar)\ **Post date:** [June 29, 2019, 11:37am UTC](https://forums.maslowcnc.com/t/corner-geometry/10351/2 "2019-06-29T11:37:18Z")
What is the version number of Ground Control you are using? We had an issue like this in the past which was fixed, maybe this is related. Will you post a copy of the gcode file? ---
**Author:** ![Oscar\_Foran](https://yyz1.discourse-cdn.com/flex031/user_avatar/forums.maslowcnc.com/oscar_foran/32/12722_2.png) [@Oscar\_Foran](https://forums.maslowcnc.com/u/Oscar_Foran)\ **Post date:** [June 29, 2019, 11:52am UTC](https://forums.maslowcnc.com/t/corner-geometry/10351/3 "2019-06-29T11:52:16Z")
![image](https://canada1.discourse-cdn.com/flex031/uploads/maslowcnc/original/2X/7/7a67fe7027d3c81889b3381fc0a01a6c3d6839a8.png) I did a basic rectangle and the same thing happens, thought that would make it easier to analyse the GCODE. Ground Control version is 1.26 I should mention that I can cut the sample GCODES that came with Ground Control with no difficulty. : (PGM, NAME=“1001”) ; T1 D=6.35 CR=0 - ZMIN=-6.2 - FLAT END MILL : G90 G40 G94 G17 G71 M26 ; 2D CONTOUR1 M9 M26 :T1 M6 M26 S12000 M3 H0 G0 X39.848 Y22.805 Z15 Z5 G1 Z1 F167 Z-5.565 G19 G2 Y22.17 Z-6.2 J22.17 K-5.565 G1 Y21.535 F500 G17 G2 X39.213 Y20.9 I39.213 J21.535 G1 X-40.195 G3 X-43.37 Y17.725 I-40.195 J17.725 G1 Y-17.725 G3 X-40.195 Y-20.9 I-40.195 J-17.725 G1 X40.195 G3 X43.37 Y-17.725 I40.195 J-17.725 G1 Y17.725 G3 X40.195 Y20.9 I40.195 J17.725 G1 X39.213 G2 X38.578 Y21.535 I39.213 J21.535 G1 Y22.17 G19 G3 Y22.805 Z-5.565 J22.17 K-5.565 G0 Z15 G17 M26 G0 X0 Y0 M30 M2 ---
**Author:** ![Gero](https://yyz1.discourse-cdn.com/flex031/user_avatar/forums.maslowcnc.com/gero/32/17487_2.png) [@Gero](https://forums.maslowcnc.com/u/Gero)\ **Post date:** [June 29, 2019, 12:53pm UTC](https://forums.maslowcnc.com/t/corner-geometry/10351/4 "2019-06-29T12:53:47Z")
What is the post-processor you are using in F360? Did you try this one? [fusion360-post-processor-for-maslow](https://forums.maslowcnc.com/t/optimizing-the-fusion360-post-processor-for-maslow/3355) bCNC and Camotics also display a strange views and the small circles are vertical. ![image](https://canada1.discourse-cdn.com/flex031/uploads/maslowcnc/original/2X/f/ff48da43d2bc6bfdb09ae572c0b16f8b18af6fe8.png) ![image](https://canada1.discourse-cdn.com/flex031/uploads/maslowcnc/original/2X/a/a1f9c03aa271780dcd97c08f2f069e4cd02c9fca.png) This is in the CAD/CAM workflow. Try the Maslow post-processor or alternative Grbl, Linux-CNC, Mach3. Kind regards, Gero Edit: G19 in the code! > G17 is XY plane, G18 is XZ plane and _G19_ is YZ Edit2: > [@Oscar\_Foran](#): > > I did a basic rectangle I took out the circles and some strange zig-zag, plus the G19 from a different plane, corrected 2 wrong x-coordinates and removed all -\>‘:’\<-. This is what a simple rectangle looks like: ![image](https://canada1.discourse-cdn.com/flex031/uploads/maslowcnc/original/2X/9/93776a7bcd2be93254da797120651045e0599520.png) ---
**Author:** ![Jatt](https://avatars.discourse-cdn.com/v4/letter/j/0ea827/32.png) [@Jatt](https://forums.maslowcnc.com/u/Jatt)\ **Post date:** [June 29, 2019, 10:32pm UTC](https://forums.maslowcnc.com/t/corner-geometry/10351/5 "2019-06-29T22:32:59Z")
it might be best if you share the fusion file for that rectangle, that way someone can look at it and see where the problem is. I’m willing to bet something isn’t set up quite right in the cam settings… ---
**Author:** ![dlang](https://yyz1.discourse-cdn.com/flex031/user_avatar/forums.maslowcnc.com/dlang/32/859_2.png) [@dlang](https://forums.maslowcnc.com/u/dlang)\ **Post date:** [June 29, 2019, 10:51pm UTC](https://forums.maslowcnc.com/t/corner-geometry/10351/6 "2019-06-29T22:51:12Z")
you keep saying you are using a simple rectangle, but based on the g-code, it’s doing a rectangle with rounded corners (and generating the wrong g3 lines for those corners) they look like a reasonable radius, but with the center in the wrong direction. ---
**Author:** ![Oscar\_Foran](https://yyz1.discourse-cdn.com/flex031/user_avatar/forums.maslowcnc.com/oscar_foran/32/12722_2.png) [@Oscar\_Foran](https://forums.maslowcnc.com/u/Oscar_Foran)\ **Post date:** [June 29, 2019, 11:06pm UTC](https://forums.maslowcnc.com/t/corner-geometry/10351/7 "2019-06-29T23:06:16Z")
OK, what dlang said there made me go back through some autodesk forums and I finally figured out that I was being a bit of an eegit and hadn’t noticed that it was set to ‘rollover corners’ in the passes section instead of ‘keep corners sharp’. Thanks for the replies, onwards and upwards, will post pics of project when it is done.