# First layer separation or Gap?

**URL:** <https://forum.lulzbot.com/t/first-layer-separation-or-gap/26280>\
**Category:** General\
**Created:** [December 28, 2023, 2:45pm UTC](https://forum.lulzbot.com/t/first-layer-separation-or-gap/26280 "2023-12-28T14:45:32Z")\
**Posts on this page:** 7\
**Page:** 1

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**Author:** ![StephenRoth](https://avatars.discourse-cdn.com/v4/letter/s/5fc32e/32.png) [@StephenRoth](https://forum.lulzbot.com/u/StephenRoth)\
**Post date:** [December 28, 2023, 2:45pm UTC](https://forum.lulzbot.com/t/first-layer-separation-or-gap/26280/1 "2023-12-28T14:45:32Z")

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Trying to see if anyone can help with this issue, can’t figure out why it’s doing it to the first layer?

 ![IMG_0986](https://us1.discourse-cdn.com/flex020/uploads/lulzbot/original/2X/b/bb89da49f9a429438714e3a0ffa74ad29442e2b9.jpeg)

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**Author:** ![Wrathernaut](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.lulzbot.com/wrathernaut/32/13542_2.png) [@Wrathernaut](https://forum.lulzbot.com/u/Wrathernaut)\
**Post date:** [December 28, 2023, 6:02pm UTC](https://forum.lulzbot.com/t/first-layer-separation-or-gap/26280/2 "2023-12-28T18:02:36Z")

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What does the underside look like?

Is the gap only on one side, or all around?

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**Author:** ![StephenRoth](https://avatars.discourse-cdn.com/v4/letter/s/5fc32e/32.png) [@StephenRoth](https://forum.lulzbot.com/u/StephenRoth)\
**Post date:** [December 28, 2023, 8:52pm UTC](https://forum.lulzbot.com/t/first-layer-separation-or-gap/26280/3 "2023-12-28T20:52:50Z")

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its all around, here is what the bottom looks like. Never had it happen before.

 ![IMG_0991](https://us1.discourse-cdn.com/flex020/uploads/lulzbot/original/2X/1/154e94252dc91137e0787194e3448c49a31d6b08.jpeg)

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<div class="post-metadata">

**Author:** ![Wrathernaut](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.lulzbot.com/wrathernaut/32/13542_2.png) [@Wrathernaut](https://forum.lulzbot.com/u/Wrathernaut)\
**Post date:** [December 28, 2023, 9:01pm UTC](https://forum.lulzbot.com/t/first-layer-separation-or-gap/26280/4 "2023-12-28T21:01:11Z")

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That isn’t the worst first layer I’ve seen, but the Z offset is a little large. Is it an error in the file?

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<div class="post-metadata">

**Author:** ![StephenRoth](https://avatars.discourse-cdn.com/v4/letter/s/5fc32e/32.png) [@StephenRoth](https://forum.lulzbot.com/u/StephenRoth)\
**Post date:** [December 28, 2023, 9:13pm UTC](https://forum.lulzbot.com/t/first-layer-separation-or-gap/26280/5 "2023-12-28T21:13:16Z")

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Offset is at -00.54, Was going to print a large flat rectangle, think saw a post somewhere to sit their and keep adjusting to see where it’s at.

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<div class="post-metadata">

**Author:** ![Wrathernaut](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.lulzbot.com/wrathernaut/32/13542_2.png) [@Wrathernaut](https://forum.lulzbot.com/u/Wrathernaut)\
**Post date:** [December 28, 2023, 9:17pm UTC](https://forum.lulzbot.com/t/first-layer-separation-or-gap/26280/6 "2023-12-28T21:17:11Z")

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For the octograb, offset should be at around +0.25-0.35, for the standard glass/PEI bed -1.25 is the average.

Doing live Z axis babystepping is a good way to get it nailed down, but that requires you know what right looks like. Just hold the knob down for a second during the first layer, and it should switch to live Z mode if you’re using Lulzbot-supplied firmware.

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<div class="post-metadata">

**Author:** ![StephenRoth](https://avatars.discourse-cdn.com/v4/letter/s/5fc32e/32.png) [@StephenRoth](https://forum.lulzbot.com/u/StephenRoth)\
**Post date:** [December 28, 2023, 9:19pm UTC](https://forum.lulzbot.com/t/first-layer-separation-or-gap/26280/7 "2023-12-28T21:19:53Z")

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cool thanks, yea going to try that. using Lulzbot firmware.