# How to recognize if your stirbar is jumping

**URL:** <https://www.evolver.bio/t/how-to-recognize-if-your-stirbar-is-jumping/68>\
**Category:** Experiments\
**Created:** [April 19, 2019, 1:28pm UTC](https://www.evolver.bio/t/how-to-recognize-if-your-stirbar-is-jumping/68 "2019-04-19T13:28:24Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![kiriakov](https://avatars.discourse-cdn.com/v4/letter/k/b5a626/32.png) [@kiriakov](https://www.evolver.bio/u/kiriakov)\
**Post date:** [April 19, 2019, 1:28pm UTC](https://www.evolver.bio/t/how-to-recognize-if-your-stirbar-is-jumping/68/1 "2019-04-19T13:28:24Z")

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In my recent experiment, I set the stirring rate too high, and some of the stirbars started jumping a couple hours into the experiment. This is how your OD traces will look if you set the stir rate too high:  
 ![jumping_stirbar](https://cdck-file-uploads-canada1.s3.dualstack.ca-central-1.amazonaws.com/flex035/uploads/evolver/original/1X/8b4a86f874032d356e5fe8f63764598b999b0b2a.png)