# Dimensional accuracy

**URL:** <https://forum.lulzbot.com/t/dimensional-accuracy/1030>\
**Category:** Software\
**Created:** [November 28, 2014, 1:30pm UTC](https://forum.lulzbot.com/t/dimensional-accuracy/1030 "2014-11-28T13:30:21Z")\
**Posts on this page:** 1\
**Showing post:** 4

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**Author:** ![rufu5](https://avatars.discourse-cdn.com/v4/letter/r/f14d63/32.png) [@rufu5](https://forum.lulzbot.com/u/rufu5)\
**Post date:** [January 24, 2015, 11:38pm UTC](https://forum.lulzbot.com/t/dimensional-accuracy/1030/4 "2015-01-24T23:38:45Z")

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> [@AustBots](#):
>
> I have been using my Taz 4 for a day and gave found a 6mm spigot come out at 6.12 and a 12mm hole come out at 11.64. Is it a percentage thing? i.e., do you make holes x% bigger and shafts x% smaller? Or do you just add .4 for holes and take .2 off shafts?

In that case, make the spigot 5.88mm and the hole 12.36mm in your drawing’s dimensions.

Depending on how much designing and printing you do, you might be able to save time by printing out a few calibration .stl’s, measuring them, and then creating a table that can be referenced when dimensioning.

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