# Right rail higher than the left

**URL:** <https://forum.onefinitycnc.com/t/right-rail-higher-than-the-left/13191>\
**Category:** Uncategorized\
**Created:** [May 20, 2022, 4:03pm UTC](https://forum.onefinitycnc.com/t/right-rail-higher-than-the-left/13191 "2022-05-20T16:03:55Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![GregoryG](https://avatars.discourse-cdn.com/v4/letter/g/97f17d/32.png) [@GregoryG](https://forum.onefinitycnc.com/u/GregoryG)\
**Post date:** [May 20, 2022, 4:03pm UTC](https://forum.onefinitycnc.com/t/right-rail-higher-than-the-left/13191/1 "2022-05-20T16:03:55Z")

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Hi I noticed my rails where not the same height, was surfacing my sacrificial board when I noticed first pass did not touch most of the left side that’s when I seen the gaps under the “linear motion shafts” I believe they are called, So I took I placed some flyers underneath both to gauge the difference, left side = .05 5 flyers right side = .18 in 20 flyers in picture

 ![20220520_083717](https://us1.discourse-cdn.com/flex022/uploads/onefinitycnc/original/3X/a/a/aa914a7f06882fe50619030c23e68362b5ed9501.jpeg)  
 ![20220520_083734](https://us1.discourse-cdn.com/flex022/uploads/onefinitycnc/original/3X/6/6/6638af9b47e79e4263be75ed0605ff2c87a1dc46.jpeg)  
my question is what should I do leave it, raise left side to .18 in ?

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**Author:** ![OnefinityCNC](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.onefinitycnc.com/onefinitycnc/32/7_2.png) [@OnefinityCNC](https://forum.onefinitycnc.com/u/OnefinityCNC)\
**Post date:** [May 20, 2022, 4:04pm UTC](https://forum.onefinitycnc.com/t/right-rail-higher-than-the-left/13191/2 "2022-05-20T16:04:29Z")

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It’s more likely your table is not 100% flat.

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<div class="post-metadata">

**Author:** ![GregoryG](https://avatars.discourse-cdn.com/v4/letter/g/97f17d/32.png) [@GregoryG](https://forum.onefinitycnc.com/u/GregoryG)\
**Post date:** [May 20, 2022, 4:19pm UTC](https://forum.onefinitycnc.com/t/right-rail-higher-than-the-left/13191/3 "2022-05-20T16:19:05Z")

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that appears to be possibly it, this is a new table, I converted from woodworker to journeyman, I’ll go over fasten ply more secure then report back thanks…