# Two small steps along the X axis. flattening

**URL:** <https://forum.onefinitycnc.com/t/two-small-steps-along-the-x-axis-flattening/25200>\
**Category:** Uncategorized\
**Created:** [February 7, 2024, 1:25pm UTC](https://forum.onefinitycnc.com/t/two-small-steps-along-the-x-axis-flattening/25200 "2024-02-07T13:25:33Z")\
**Posts on this page:** 1\
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**Author:** ![349iq2345](https://avatars.discourse-cdn.com/v4/letter/3/bb73d2/32.png) [@349iq2345](https://forum.onefinitycnc.com/u/349iq2345)\
**Post date:** [February 7, 2024, 5:17pm UTC](https://forum.onefinitycnc.com/t/two-small-steps-along-the-x-axis-flattening/25200/2 "2024-02-07T17:17:38Z")

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Hey Tony,

usually with this issue it’s the machine, not the software.

Have you ensured that your machine is [**rectangular** (“squared”) (_bar gauge_) and **coplanar** (“not twisted”) (_fishing line method_)](https://forum.onefinitycnc.com/t/what-do-i-do-first/18349/6).

In both cases if it is not accurately adjusted, not only you can get parallelograms instead of rectangles, but also workpieces with a twisted surface. Surfacing the wasteboard will not help against lack of coplanarity (twisted machine base), the machine will only reproduce the twist on the workpiece surface. **Also if any of both is not accurately adjusted, the Y movement can block.**

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