# Ebb sb2209 usb MCU "EBB" shutdown: Timer too close

**URL:** <https://klipper.discourse.group/t/ebb-sb2209-usb-mcu-ebb-shutdown-timer-too-close/24812>\
**Category:** General Discussion\
**Created:** [September 8, 2025, 10:16am UTC](https://klipper.discourse.group/t/ebb-sb2209-usb-mcu-ebb-shutdown-timer-too-close/24812 "2025-09-08T10:16:05Z")\
**Posts on this page:** 8\
**Page:** 1

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**Author:** ![NGYX](https://yyz2.discourse-cdn.com/free1/user_avatar/klipper.discourse.group/ngyx/32/20466_2.png) [@NGYX](https://klipper.discourse.group/u/NGYX)\
**Post date:** [September 8, 2025, 10:16am UTC](https://klipper.discourse.group/t/ebb-sb2209-usb-mcu-ebb-shutdown-timer-too-close/24812/1 "2025-09-08T10:16:05Z")

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### Basic Information:

Printer Model:voron 2.4r2 awd  
 MCU / Printerboard:fly-9 and ebb sb2209 usb  
 Host / SBC:Intel nuc5  
 klippy.log

[klippy (3).zip](https://klipper.discourse.group/uploads/short-url/a0wyg1sZQPVxRnyqi7BZWrqnIHi.zip) (869.6 KB)

When I try to print the 3D Benchy model with an acceleration of 20,000 mm/s², a speed of 1,000 mm/s, and the Minimum Cruise Ratio turned off, an error occurs: MCU “EBB” shutdown: Timer too close. This error is reproducible.

 ![Cache_4d0e6f3f2f0dde7c](https://global.discourse-cdn.com/free1/uploads/klipper/original/3X/8/4/846af02c2ff2537843f0f6cbedbe4258a6105bbd.jpeg)

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**Author:** ![EddyMI3D](https://yyz2.discourse-cdn.com/free1/user_avatar/klipper.discourse.group/eddymi3d/32/1981_2.png) [@EddyMI3D](https://klipper.discourse.group/u/EddyMI3D)\
**Post date:** [September 8, 2025, 12:05pm UTC](https://klipper.discourse.group/t/ebb-sb2209-usb-mcu-ebb-shutdown-timer-too-close/24812/2 "2025-09-08T12:05:52Z")

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Hello @NGYX !

> [@NGYX](#):
>
> acceleration of 20,000 mm/s², a speed of 1,000 mm/s,

Don’t yo think those values are a bit high?

More information here: [Timer too close](https://klipper.discourse.group/t/timer-too-close/6634)

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**Author:** ![nefelim4ag](https://yyz2.discourse-cdn.com/free1/user_avatar/klipper.discourse.group/nefelim4ag/32/2387_2.png) [@nefelim4ag](https://klipper.discourse.group/u/nefelim4ag)\
**Post date:** [September 8, 2025, 12:21pm UTC](https://klipper.discourse.group/t/ebb-sb2209-usb-mcu-ebb-shutdown-timer-too-close/24812/3 "2025-09-08T12:21:43Z")

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@EddyMI3D, jfyi, it is totally fine, I assure you. Physics does not restrict that.  
I can also do that 😃

* * *

> [@NGYX](#):
>
> When I try to print the 3D Benchy model

I’m very sorry, but we could not help you:

```auto
Args: ['/home/ngyx/klipper/klippy/klippy.py', '/home/ngyx/printer_data/config/printer.cfg', '-I', '/home/ngyx/printer_data/comms/klippy.serial', '-l', '/home/ngyx/printer_data/logs/klippy.log', '-a', '/home/ngyx/printer_data/comms/klippy.sock']
App Name: Kalico
Git version: 'v0.12.0-715-g91fd6480'
Branch: main
Remote: origin
Tracked URL: https://github.com/KalicoCrew/kalico

```

You can either do:

- Ask Kalico crew
- Use the latest clean Klipper

Hope that helps.

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**Author:** ![NGYX](https://yyz2.discourse-cdn.com/free1/user_avatar/klipper.discourse.group/ngyx/32/20466_2.png) [@NGYX](https://klipper.discourse.group/u/NGYX)\
**Post date:** [September 8, 2025, 12:25pm UTC](https://klipper.discourse.group/t/ebb-sb2209-usb-mcu-ebb-shutdown-timer-too-close/24812/4 "2025-09-08T12:25:09Z")

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No way, I used AWD. This speed shouldn’t be considered fast.

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**Author:** ![nefelim4ag](https://yyz2.discourse-cdn.com/free1/user_avatar/klipper.discourse.group/nefelim4ag/32/2387_2.png) [@nefelim4ag](https://klipper.discourse.group/u/nefelim4ag)\
**Post date:** [September 8, 2025, 12:26pm UTC](https://klipper.discourse.group/t/ebb-sb2209-usb-mcu-ebb-shutdown-timer-too-close/24812/5 "2025-09-08T12:26:34Z")

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> [@NGYX](#):
>
> No way, I used AWD. This speed shouldn’t be considered fast.

AWD has nothing to do with mm/s - voltage does  
AWD has to do with acceleration, so mm/s^2

Anyway, this is true, that generally the above numbers are not insane.

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**Author:** ![NGYX](https://yyz2.discourse-cdn.com/free1/user_avatar/klipper.discourse.group/ngyx/32/20466_2.png) [@NGYX](https://klipper.discourse.group/u/NGYX)\
**Post date:** [September 8, 2025, 12:43pm UTC](https://klipper.discourse.group/t/ebb-sb2209-usb-mcu-ebb-shutdown-timer-too-close/24812/6 "2025-09-08T12:43:06Z")

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Sorry, my translation software mixed things up.

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**Author:** ![NGYX](https://yyz2.discourse-cdn.com/free1/user_avatar/klipper.discourse.group/ngyx/32/20466_2.png) [@NGYX](https://klipper.discourse.group/u/NGYX)\
**Post date:** [September 8, 2025, 2:59pm UTC](https://klipper.discourse.group/t/ebb-sb2209-usb-mcu-ebb-shutdown-timer-too-close/24812/7 "2025-09-08T14:59:35Z")

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Thanks, I think I should go to the kalico branch to ask instead.

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**Author:** ![system](https://global.discourse-cdn.com/free1/uploads/klipper/original/1X/64419bf2aac6639e6ef5cef200dcd456b0a01ac3.png) [@system](https://klipper.discourse.group/u/system)\
**Post date:** [November 7, 2025, 3:00pm UTC](https://klipper.discourse.group/t/ebb-sb2209-usb-mcu-ebb-shutdown-timer-too-close/24812/8 "2025-11-07T15:00:28Z")

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