# M4 Accuracy? Say on a straight line of 60" how straight is it, best case and worse case?

**URL:** https://forums.maslowcnc.com/t/m4-accuracy-say-on-a-straight-line-of-60-how-straight-is-it-best-case-and-worse-case/23490
**Category:** Uncategorized
**Created:** [March 3, 2025, 9:33pm UTC](https://forums.maslowcnc.com/t/m4-accuracy-say-on-a-straight-line-of-60-how-straight-is-it-best-case-and-worse-case/23490 "2025-03-03T21:33:28Z")
**Posts on this page:** 3
**Page:** 1

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### Author: ![ceka](https://avatars.discourse-cdn.com/v4/letter/c/3bc359/32.png) [@ceka](https://forums.maslowcnc.com/u/ceka)
#### Post date: [March 3, 2025, 9:33pm UTC](https://forums.maslowcnc.com/t/m4-accuracy-say-on-a-straight-line-of-60-how-straight-is-it-best-case-and-worse-case/23490/1 "2025-03-03T21:33:28Z")

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I have two earlier versions, Maslow and Makermade using RPI4. Can anyone tell me how accurate M4 is when ciutting a straight line of say 60" or more? What is the deviation?  
Also, most importantly can I stop and resume cutting without nicks or divets in a cut. For example if I want to cut 24x36 cabinet doors. Mahogany veneer plywood is now over $100 sheet. I cannot afford any mistakes  
I was not able to do that before.  
Also, on the Z axis, what is the range (depth) of the cut?

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### Author: ![N8DGR8](https://yyz1.discourse-cdn.com/flex031/user_avatar/forums.maslowcnc.com/n8dgr8/32/25633_2.png) [@N8DGR8](https://forums.maslowcnc.com/u/N8DGR8)
#### Post date: [March 4, 2025, 5:22am UTC](https://forums.maslowcnc.com/t/m4-accuracy-say-on-a-straight-line-of-60-how-straight-is-it-best-case-and-worse-case/23490/2 "2025-03-04T05:22:33Z")

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I think you would be better off using a track saw if straight lines is important.

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### 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: [March 4, 2025, 7:10pm UTC](https://forums.maslowcnc.com/t/m4-accuracy-say-on-a-straight-line-of-60-how-straight-is-it-best-case-and-worse-case/23490/3 "2025-03-04T19:10:26Z")

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Chuck Krumenacker wrote:

> I have two earlier versions, Maslow and Makermade using RPI4. Can anyone tell me how accurate M4 is when ciutting a straight line of say 60" or more? What is the deviation?  
> Also, most importantly can I stop and resume cutting without nicks or divets in a cut. For example if I want to cut 24x36 cabinet doors. Mahogany veneer plywood is now over $100 sheet. I cannot afford any mistakes  
> I was not able to do that before.

It’s going to depend on how rigid your frame is and how accurate your  
calibration is. We have not had a lot of people testing this

> Also, on the Z axis, what is the range (depth) of the cut?

there is about 2" of spindle travel possible, but only some of that will be  
useful, it depends on your bit.

David Lang