# ESC problem - One engine is shaking

Source: https://forum.modalai.com/topic/4705/esc-problem-one-engine-is-shaking
Category: ESCs, Sensors and Accessories (https://forum.modalai.com/category/15/escs-sensors-and-accessories)
Tags: esc
Posted: 2025-08-26 20:58:51 UTC by tomverstappen
Replies: 3 · Views: 2234

## tomverstappen · 2025-08-26 20:58:51 UTC

I have encountered an issue with the new ESC we received last week.
I’ve attached both pictures from the ADB shell and a video of the test we just performed.

Test results:

Installed the new ESC on our test platform and started the motors—the motor on ESC3 (zero-based) is shaking.

Reinstalled the old ESC (with the broken MOSFET part)—the motor on ESC3 (zero-based) runs without any problem.

Reinstalled the new ESC again—the same issue from Test 1 occurs.

We also noticed that the new ESC is reported as version 44, showing the message “Unknown Board.”

Could you please advise on the next steps to resolve this?

## Reply by Moderator (ModalAI staff) · 2025-08-26 21:54:26 UTC

Sorry you are running into issues

Can you help with some more information?

* What motor are you using with the M0129 ESC?
* What battery cell count are you using?
* Have you performed the ESC calibration?
* Can you share the ESC params you are using?
* Can you share a video of the issue?

## Reply by tomverstappen · 2025-08-26 22:21:32 UTC (in reply to Moderator)

@Moderator 

Thanks for asking us these questions, because we looked at the ESC params, uploaded the D0012 Starling Max again via the VOXL ESC Upload param script and now it works.

Kind Regards,
Tom

## Reply by Alex Kushleyev (ModalAI staff) · 2025-08-27 16:28:12 UTC (in reply to tomverstappen)

@tomverstappen , I am glad you got this resolved. The "unknown board" message you were receiving was due to the older release of `voxl-esc` package, which did not recognize (and did not have firmware for) the M0129-6 ESC, which is the 6S-compatible version of the M0129 ESC.

I hope this clarifies that issue.

Alex