# Propellers spin and then stop

Source: https://forum.modalai.com/topic/3737/propellers-spin-and-then-stop
Category: General Questions (https://forum.modalai.com/category/2/general-questions)
Posted: 2024-08-26 15:32:56 UTC by Kiazoa Joao
Replies: 5 · Views: 975

## Kiazoa Joao · 2024-08-26 15:32:56 UTC

Hello!

I have a development drone (M500) that was purchased from Modal Ai. I was able to get it to connect fine. However, when I try to spin the motors using QGC, they spin only at low speed. Whenever I try to increase the speed, they fail and I lose connection. Can somebody help me figure out what the issue might be?

Regards,
Kiazoa

## Reply by pthomason · 2024-08-26 16:31:11 UTC

@Kiazoa-Joao Are you using the wall power adapter or full batteries? The power adapter doesn't have enough current to support the motors at full speed.

## Reply by Kiazoa Joao · 2024-08-26 17:56:19 UTC (in reply to pthomason)

@pthomason Hi! I am using batteries. No power adapter

## Reply by Kiazoa Joao · 2024-08-26 18:52:29 UTC (in reply to Kiazoa Joao)

I just found out that my baud rate was off. I changed it to 2,000,000 and they're working fine now.

## Reply by Alex Kushleyev (ModalAI staff) · 2024-08-30 16:27:59 UTC (in reply to Kiazoa Joao)

@Kiazoa-Joao . Great!

We have recently added a check to `voxl-esc` tools to prevent setting incorrect baud rates. However, the typo is still possible in PX4. I will add a check on the PX4 param in PX4 voxl esc driver.

Alex

## Reply by Kiazoa Joao · 2024-09-04 20:57:47 UTC (in reply to Alex Kushleyev)

@Alex-Kushleyev sounds good