# Problem reconnecting gSender to my CNC

**URL:** <https://forum.sienci.com/t/problem-reconnecting-gsender-to-my-cnc/26646>\
**Category:** ❓ Question\
**Created:** [June 29, 2026, 4:40pm UTC](https://forum.sienci.com/t/problem-reconnecting-gsender-to-my-cnc/26646 "2026-06-29T16:40:45Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![MoeT](https://forum.sienci.com/letter_avatar_proxy/v4/letter/m/c6cbf5/32.png) [@MoeT](https://forum.sienci.com/u/MoeT)\
**Post date:** [June 29, 2026, 4:40pm UTC](https://forum.sienci.com/t/problem-reconnecting-gsender-to-my-cnc/26646/1 "2026-06-29T16:40:45Z")

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I completed a portion of my project yesterday, when the roughing portion completed I got error messages regarding maintenance. The dialogs kept coming where I had to shutdown gSender. I reopened gSender but it would not reconnect to my CNC

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**Author:** ![DavidB](https://forum.sienci.com/letter_avatar_proxy/v4/letter/d/76d3ee/32.png) [@DavidB](https://forum.sienci.com/u/DavidB)\
**Post date:** [June 30, 2026, 1:02am UTC](https://forum.sienci.com/t/problem-reconnecting-gsender-to-my-cnc/26646/2 "2026-06-30T01:02:59Z")

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You may have already tried this but I noticed with mine at least I have to turn on the controller ( in my case the SLB-EXT) only after gSender has been opened. So if I restart gSender I have to restart the controller to connect. I am using USB connection with gSender 1.6.2 and [Main\_grblHAL (20260525)](https://drive.google.com/file/d/1DyymJLXV8rH4l39VM9VgCTyUuCH7AghP/view?usp=drive_link) firmware.