# How to define scan area?
**URL:** https://openflexure.discourse.group/t/how-to-define-scan-area/321
**Category:** Request Help
**Created:** [3 December 2020 17:59 UTC](https://openflexure.discourse.group/t/how-to-define-scan-area/321 "2020-12-03T17:59:33Z")
**Posts on this page:** 2
**Page:** 2
### Author:  [@WilliamW](https://openflexure.discourse.group/u/WilliamW)
#### Post date: [13 May 2026 15:46 UTC](https://openflexure.discourse.group/t/how-to-define-scan-area/321/21 "2026-05-13T15:46:08Z")
The current state of the master build gives a range of motion that measures 11.8×11.8mm, and is square. I have been trying to work out how to determine the centre position reliably enough to know whether we should allow extra motion up on the actuator, or down (or both) to allow the full design motion of 12×12mm.
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### Author:  [@WilliamW](https://openflexure.discourse.group/u/WilliamW)
#### Post date: [13 May 2026 15:48 UTC](https://openflexure.discourse.group/t/how-to-define-scan-area/321/22 "2026-05-13T15:48:21Z")
You will need basically all the parts new from the current master build. It is not just the main body that changed, the feet as well, and the sample clips.
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