# Cheap 48inch construction levels for the win

**URL:** <https://forum.sienci.com/t/cheap-48inch-construction-levels-for-the-win/15484>\
**Category:** 🎉 Assembly done!\
**Created:** [January 13, 2025, 4:11pm UTC](https://forum.sienci.com/t/cheap-48inch-construction-levels-for-the-win/15484 "2025-01-13T16:11:15Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![evanurmy](https://forum.sienci.com/letter_avatar_proxy/v4/letter/e/cdc98d/32.png) [@evanurmy](https://forum.sienci.com/u/evanurmy)\
**Post date:** [January 13, 2025, 4:11pm UTC](https://forum.sienci.com/t/cheap-48inch-construction-levels-for-the-win/15484/1 "2025-01-13T16:11:15Z")

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I was having issues with a wavy bed. I got around it by using a sacrificial waste board that I would flatten before each project. I changed my garage layout and had to disassemble the old table and since I had it apart I took the time to design a torsion table integrating the Longmill into the design and overall rigidity.

I decided to use 4 each 48 inch/1200mm aluminum construction levels sandwiched between plywood and MDF.  
I predrilled and countersunk every hole through the levels on each side so that I would get a solid and flat connection between the levels and the wood sheathing.  
I made sure to use screws that had an unthreaded portion to get strong forces pulling the pieces together instead of pulling on the wood itself.

Then I constructed the waste board out of replaceable MDF slats and aluminum T-slots running perpendicular to the levels within the table.

I then adjusted the feet on the Longmill so that they lined up with the levels within the table, but waited to drill those holes until I squared the CNC.

Then I loosely screwed down one leg of the CNC with just one screw on each end and went through the calibration procedure in G-sender to square the legs. Once squared, I drilled the holes and mounted them.

The end result is dead flat. The levels had internal holes that allowed me to route the wiring internally. I will do the finish work next, but wanted ti share the open table pictures before I go any further.

 ![IMG_1405 Medium](https://forum.sienci.com/uploads/default/original/2X/a/a60ce7e8f727bc31e81ef285736bad524bed4e91.jpeg)  
 ![IMG_1416 Medium](https://forum.sienci.com/uploads/default/original/2X/e/edf2f4afabc78f3b6db6006e9d4df8cee95c08db.jpeg)  
 ![IMG_1410 2 Medium](https://forum.sienci.com/uploads/default/original/2X/e/e32efb9c306017f3abe8c0fed82c76f6b81a96d9.jpeg)  
 ![IMG_1415 Medium](https://forum.sienci.com/uploads/default/original/2X/5/5dce6aed015845a572071af7f7fd4f4a0d84be82.jpeg)

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**Author:** ![Jake](https://forum.sienci.com/user_avatar/forum.sienci.com/jake/32/2491_2.png) [@Jake](https://forum.sienci.com/u/Jake)\
**Post date:** [January 13, 2025, 4:36pm UTC](https://forum.sienci.com/t/cheap-48inch-construction-levels-for-the-win/15484/2 "2025-01-13T16:36:23Z")

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First of all welcome to the forum @evanurmy ! Great folks here Evan. I hope you enjoy your time here.

Definitely an interesting approach to a flat table! This is what makes this a great place to visit. Everyone has their own approach to making their CNC machine work. Thanks for sharing and again, welcome!  
Jake

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**Author:** ![evanurmy](https://forum.sienci.com/letter_avatar_proxy/v4/letter/e/cdc98d/32.png) [@evanurmy](https://forum.sienci.com/u/evanurmy)\
**Post date:** [January 13, 2025, 6:35pm UTC](https://forum.sienci.com/t/cheap-48inch-construction-levels-for-the-win/15484/3 "2025-01-13T18:35:08Z")

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Thanks for the welcome Jake! I have found plenty of useful information here.

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**Author:** ![Verno](https://forum.sienci.com/user_avatar/forum.sienci.com/verno/32/7952_2.png) [@Verno](https://forum.sienci.com/u/Verno)\
**Post date:** [January 14, 2025, 2:31am UTC](https://forum.sienci.com/t/cheap-48inch-construction-levels-for-the-win/15484/4 "2025-01-14T02:31:24Z")

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@evanurmy Evan I cerebrate your “out of the box” idea to come up with a solution , This is one of the encouraging aspects of this forum.  
Thanks for pics and description. Nice Work!

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**Author:** ![William1](https://forum.sienci.com/user_avatar/forum.sienci.com/william1/32/8497_2.png) [@William1](https://forum.sienci.com/u/William1)\
**Post date:** [January 15, 2025, 2:50pm UTC](https://forum.sienci.com/t/cheap-48inch-construction-levels-for-the-win/15484/5 "2025-01-15T14:50:53Z")

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That’s genius. You will always know its level.  
Sienci could incorporate a level bubble in new table parts. Unless they already have.

Cool

William