# 3 inch box with box joints
**URL:** https://forums.maslowcnc.com/t/3-inch-box-with-box-joints/23846
**Category:** My First Cuts
**Created:** [April 21, 2025, 2:03am UTC](https://forums.maslowcnc.com/t/3-inch-box-with-box-joints/23846 "2025-04-21T02:03:41Z")
**Posts on this page:** 18
**Page:** 1
### Author:  [@Cristian\_Paul\_Martin](https://forums.maslowcnc.com/u/Cristian_Paul_Martin)
#### Post date: [April 21, 2025, 2:03am UTC](https://forums.maslowcnc.com/t/3-inch-box-with-box-joints/23846/1 "2025-04-21T02:03:41Z")
I’m so happy first cut was a big little success and went easy & smoothly. Some small inconsistencies ( not perfect 90 degrees on every corner & some joints are not perfectly flush.
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### Author:  [@Cristian\_Paul\_Martin](https://forums.maslowcnc.com/u/Cristian_Paul_Martin)
#### Post date: [April 21, 2025, 2:04am UTC](https://forums.maslowcnc.com/t/3-inch-box-with-box-joints/23846/2 "2025-04-21T02:04:17Z")
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### Author:  [@Djfergy](https://forums.maslowcnc.com/u/Djfergy)
#### Post date: [April 21, 2025, 11:37am UTC](https://forums.maslowcnc.com/t/3-inch-box-with-box-joints/23846/3 "2025-04-21T11:37:32Z")
Congratulations. The inner objects look spot on. Does the skew seen in the two far right objects effectively define the work area given the size of the frame? Waiting to set mine up and thinking about the size.
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### Author:  [@Cristian\_Paul\_Martin](https://forums.maslowcnc.com/u/Cristian_Paul_Martin)
#### Post date: [April 21, 2025, 9:24pm UTC](https://forums.maslowcnc.com/t/3-inch-box-with-box-joints/23846/4 "2025-04-21T21:24:41Z")
Hi, I was suggested for my work area to be 18 inches from my frame / anchors to the work area.
My frame is 4x4 feet ( my anchors are actually 42 inches apart). So I made my working area 18 inches in from each side giving me a 12 inch x 12inch working area.
Those little peices of osb wood are 12 inches to help me visualize the working area and more importantly support the sled so I can cut on the edge without it tipping.
I’m not sure why the far right parts are skewed.
Today I made a second box a little larger with the cuts extending past my calibrated zone about an inch .Those parts seem fine. It’s actually the other peices that will not fit together.
I think I will experiment running calibration again with a 5x5 grid instead of 3x3 to hopefully get better accuracy.
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### Author:  [@Cristian\_Paul\_Martin](https://forums.maslowcnc.com/u/Cristian_Paul_Martin)
#### Post date: [April 21, 2025, 9:32pm UTC](https://forums.maslowcnc.com/t/3-inch-box-with-box-joints/23846/5 "2025-04-21T21:32:48Z")
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### Author:  [@Cristian\_Paul\_Martin](https://forums.maslowcnc.com/u/Cristian_Paul_Martin)
#### Post date: [April 21, 2025, 9:35pm UTC](https://forums.maslowcnc.com/t/3-inch-box-with-box-joints/23846/6 "2025-04-21T21:35:02Z")
Almost fits but not quite
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### Author:  [@Cristian\_Paul\_Martin](https://forums.maslowcnc.com/u/Cristian_Paul_Martin)
#### Post date: [April 21, 2025, 9:38pm UTC](https://forums.maslowcnc.com/t/3-inch-box-with-box-joints/23846/7 "2025-04-21T21:38:08Z")
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### Author:  [@dlang](https://forums.maslowcnc.com/u/dlang)
#### Post date: [April 21, 2025, 9:55pm UTC](https://forums.maslowcnc.com/t/3-inch-box-with-box-joints/23846/8 "2025-04-21T21:55:55Z")
Cristian Paul Martinez wrote:
> My frame is 4x4 feet ( my anchors are actually 42 inches apart). So I made my working area 18 inches in from each side giving me a 12 inch x 12inch working area.
are the anchors at the wasteboard height? or are then closer to the level of the
arms? (and did you change the Z offset settings in the maslow.yaml file to
match)
David Lang
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### Author:  [@Cristian\_Paul\_Martin](https://forums.maslowcnc.com/u/Cristian_Paul_Martin)
#### Post date: [April 21, 2025, 10:07pm UTC](https://forums.maslowcnc.com/t/3-inch-box-with-box-joints/23846/9 "2025-04-21T22:07:30Z")
They are different heights close to the height of the arms not the material being cut.
But oops I just realized I had my frame rotated sideways so the anchors were not corresponding to the right sized risers and the reason the sled was lifting was because the bottom left riser was taller than where it attached to the machine and yoinked the whole thing upwards.
I have not changed the z height in the yaml file. I remember you suggested earlier it earlier thanks for reminding me. I’m going to attempt that now
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### Author:  [@Cristian\_Paul\_Martin](https://forums.maslowcnc.com/u/Cristian_Paul_Martin)
#### Post date: [April 21, 2025, 10:36pm UTC](https://forums.maslowcnc.com/t/3-inch-box-with-box-joints/23846/10 "2025-04-21T22:36:55Z")
never edited a yaml file before but i found an editor online i can use ([codebeautify.org](http://codebeautify.org))
this section is near the top
Maslow\_brY
:
0
Maslow\_tlZ
:
100
Maslow\_trZ
:
56
Maslow\_blZ
:
34
Maslow\_brZ
:
78
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### Author:  [@Cristian\_Paul\_Martin](https://forums.maslowcnc.com/u/Cristian_Paul_Martin)
#### Post date: [April 21, 2025, 10:39pm UTC](https://forums.maslowcnc.com/t/3-inch-box-with-box-joints/23846/11 "2025-04-21T22:39:35Z")
i assume its shorthand for bottom right , top left ect. and the measurements in mm seem to match the top of the belt height from the top of the sled.
Is this the section i need to edit? should i change the numbers to match the height of the top of the belts at the anchor points?
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### Author:  [@Cristian\_Paul\_Martin](https://forums.maslowcnc.com/u/Cristian_Paul_Martin)
#### Post date: [April 21, 2025, 11:22pm UTC](https://forums.maslowcnc.com/t/3-inch-box-with-box-joints/23846/12 "2025-04-21T23:22:11Z")
okay, it actually answers all those questions in the yaml. file.
"Z axis values
# These define the height of the anchor points in relation to each of the arms. You do not need to change these typically"
so i thinky if i get the anchor height the same as the arms i change all the z values to 0
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### Author:  [@Cristian\_Paul\_Martin](https://forums.maslowcnc.com/u/Cristian_Paul_Martin)
#### Post date: [April 21, 2025, 11:46pm UTC](https://forums.maslowcnc.com/t/3-inch-box-with-box-joints/23846/13 "2025-04-21T23:46:43Z")
so my new y values are
Maslow\_tlZ: 14
Maslow\_trZ: 0
Maslow\_blZ: -7
Maslow\_brZ: 2
the negative value is an anchor points higher than the arm.
because i used half inch spacers. i think i will shave some height off the bottom left to be safe and raise the top left half an inch to get them all closer to perfect.
the material will eventually add some thickness i assume i don’t input. idk if those extra 10-25 mm matter but ill focus on that later. i guess if im cutting especially thick stock i could make another yaml file to account for that.
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### Author:  [@dlang](https://forums.maslowcnc.com/u/dlang)
#### Post date: [April 21, 2025, 11:52pm UTC](https://forums.maslowcnc.com/t/3-inch-box-with-box-joints/23846/14 "2025-04-21T23:52:19Z")
you can also edit these values in the web interface (next to where you upload
the file you can change individual settings)
David Lang
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### Author:  [@dlang](https://forums.maslowcnc.com/u/dlang)
#### Post date: [April 21, 2025, 11:54pm UTC](https://forums.maslowcnc.com/t/3-inch-box-with-box-joints/23846/15 "2025-04-21T23:54:13Z")
Cristian Paul Martinez wrote:
> They are different heights close to the height of the arms not the material being cut.
set the offset to the difference in where the belt is at the anchor vs at the
arm with the router all the way down. (and remember to have it all the way down
when you do calibration)
David Lang
---
### Author:  [@Cristian\_Paul\_Martin](https://forums.maslowcnc.com/u/Cristian_Paul_Martin)
#### Post date: [April 21, 2025, 11:56pm UTC](https://forums.maslowcnc.com/t/3-inch-box-with-box-joints/23846/16 "2025-04-21T23:56:47Z")
thank you. you’re very generous offering help
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### Author:  [@dlang](https://forums.maslowcnc.com/u/dlang)
#### Post date: [April 21, 2025, 11:58pm UTC](https://forums.maslowcnc.com/t/3-inch-box-with-box-joints/23846/17 "2025-04-21T23:58:58Z")
Cristian Paul Martinez wrote:
> so my new y values are
>
> Maslow\_tlZ: 14
> Maslow\_trZ: 0
> Maslow\_blZ: -7
> Maslow\_brZ: 2
>
> the negative value is an anchor points higher than the arm.
> because i used half inch spacers. i think i will shave some height off the bottom left to be safe and raise the top left half an inch to get them all closer to perfect.
>
> the material will eventually add some thickness i assume i don’t input. idk if those extra 10-25 mm matter but ill focus on that later. i guess if im cutting especially thick stock i could make another yaml file to account for that.
In an ideal world, you would add the matiral thickness to these values. If they
are off a little bit it probably won’t hurt much, but if you plan to work on
1/2" and 3/4" material most of the time, I would add your most common one to
these values (and don’t forget any wasteboard you have as well)
David Lang
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### Author:  [@md8n](https://forums.maslowcnc.com/u/md8n)
#### Post date: [April 22, 2025, 4:34am UTC](https://forums.maslowcnc.com/t/3-inch-box-with-box-joints/23846/18 "2025-04-22T04:34:30Z")
> [@Cristian\_Paul\_Martin](#):
>
> Maslow\_tlZ: 14
> Maslow\_trZ: 0
> Maslow\_blZ: -7
> Maslow\_brZ: 2
Without your anchor risers, these should be at 22mm difference from each other based on stacking order of your arms.
Then there’s the difference between your nominal ‘base’ (probably top of waste board + thickness of your material) i.e. what the sled will ride over, and the bottom-most arm, and I forget what that is but dlang probably knows off the top of his head.
And then you can throw in all your riser offsets to complete the maths.
I used to have a full set of offset anchors, but I’m using a verticalish orientation and I found it lead to the sled tipping off the board from time to time. So now I just use one offset anchor for the ‘highest’ arm. And then tweak all of the `Maslow_**Z` values to match,