# Basic X & Y Accuracy Analysis Advice Needed **URL:** \ **Category:** Troubleshooting\ **Created:** [April 24, 2025, 8:09pm UTC](https://forums.maslowcnc.com/t/basic-x-y-accuracy-analysis-advice-needed/23892 "2025-04-24T20:09:09Z")\ **Posts on this page:** 9\ **Page:** 1
**Author:** ![VetterTech](https://yyz1.discourse-cdn.com/flex031/user_avatar/forums.maslowcnc.com/vettertech/32/24576_2.png) [@VetterTech](https://forums.maslowcnc.com/u/VetterTech)\ **Post date:** [April 24, 2025, 8:09pm UTC](https://forums.maslowcnc.com/t/basic-x-y-accuracy-analysis-advice-needed/23892/1 "2025-04-24T20:09:09Z")
Is there a method now to add a correction coefficient for the X and Y axis, or should I scale this in CAD as previous threads suggested? I made a simple test grid of nine 12"x12" squares separated by an inch boarder in the center of the spoil board. Each was made by re-homing the CNC, and running gcode for a single square. The boxes measure a seemingly constant 11 5/8" (y axis) X 12 1/8" (X axis) on the hourglass frame.. If I can hone this in to around a 1/32" total variation on an axis, things will be close enough for my first projects. ![grid](https://canada1.discourse-cdn.com/flex031/uploads/maslowcnc/original/3X/c/8/c8a97b7a4fb442e1ca1a83540615b7eb057c7c67.jpeg) ---
**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:** [April 24, 2025, 8:22pm UTC](https://forums.maslowcnc.com/t/basic-x-y-accuracy-analysis-advice-needed/23892/2 "2025-04-24T20:22:15Z")
probably best to do this in the CAD right now. David Lang ---
**Author:** ![Deadset](https://avatars.discourse-cdn.com/v4/letter/d/94ad74/32.png) [@Deadset](https://forums.maslowcnc.com/u/Deadset)\ **Post date:** [April 25, 2025, 9:29am UTC](https://forums.maslowcnc.com/t/basic-x-y-accuracy-analysis-advice-needed/23892/3 "2025-04-25T09:29:30Z")
> [@dlang](#): > > probably best to do this in the CAD right now. Any reason on why this is? I have a pretty consistent error on my y axis as well and was just planning on changing the “axes/y/steps\_per\_mm” to be higher by 1% like ive done on previous gantry style cnc routers. Is there something about the maslow as to why this wont work? I would really prefer not to have to scale in cad ---
**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:** [April 25, 2025, 5:01pm UTC](https://forums.maslowcnc.com/t/basic-x-y-accuracy-analysis-advice-needed/23892/4 "2025-04-25T17:01:48Z")
I think that it seems like a pretty easy thing to add to the settings. I’ll put it in there for the next version. ---
**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:** [April 25, 2025, 5:38pm UTC](https://forums.maslowcnc.com/t/basic-x-y-accuracy-analysis-advice-needed/23892/5 "2025-04-25T17:38:49Z")
Deadset wrote: > > [@dlang](#): > > > > probably best to do this in the CAD right now. > > Any reason on why this is? I have a pretty consistent error on my y axis as > well and was just planning on changing the “axes/y/steps\_per\_mm” to be higher > by 1% like ive done on previous gantry style cnc routers. Is there something > about the maslow as to why this wont work? I would really prefer not to have > to scale in cad the maslow does not have the steps\_per\_mm setting given it’s very different kinematics David Lang ---
**Author:** ![Deadset](https://avatars.discourse-cdn.com/v4/letter/d/94ad74/32.png) [@Deadset](https://forums.maslowcnc.com/u/Deadset)\ **Post date:** [April 25, 2025, 9:11pm UTC](https://forums.maslowcnc.com/t/basic-x-y-accuracy-analysis-advice-needed/23892/6 "2025-04-25T21:11:53Z")
> [@bar](#): > > I think that it seems like a pretty easy thing to add to the settings So whats the steps\_per\_mm setting in the yaml config then if its not that ---
**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:** [April 25, 2025, 9:15pm UTC](https://forums.maslowcnc.com/t/basic-x-y-accuracy-analysis-advice-needed/23892/7 "2025-04-25T21:15:18Z")
FluidNC requires it to be there, but it’s not used for anything (except for the z-axis which has stepper motors). Basically every other hobby level CNC router uses stepper motors so the software just expects us to have a value to put there. ---
**Author:** ![Deadset](https://avatars.discourse-cdn.com/v4/letter/d/94ad74/32.png) [@Deadset](https://forums.maslowcnc.com/u/Deadset)\ **Post date:** [April 25, 2025, 9:21pm UTC](https://forums.maslowcnc.com/t/basic-x-y-accuracy-analysis-advice-needed/23892/8 "2025-04-25T21:21:58Z")
Ah i see, well yeah if its possible to add that in, that would be a great tool! ---
**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:** [April 25, 2025, 10:28pm UTC](https://forums.maslowcnc.com/t/basic-x-y-accuracy-analysis-advice-needed/23892/9 "2025-04-25T22:28:13Z")
I should be able to get it in for next week’s update!