UR5e Could not get fresh data package from robot

ROS
1

Hi. I’m new to ROS and UR and I want to use a PC to control our UR5e.

I follow the guide on Universal_Robots_ROS_Driver and when launching the ur5e_bringup.launch there are scrolling errors ‘Could not get fresh data package from robot’ in the terminal. If I start the external_control on ur pendant, there will show up a message telling ‘Ready to receive control commands’, but still reporting same errors.

Seems that there’s no error on the UR5e pendant.

1
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Enviroment:
Host PC Win11 with Ubuntu18.04 and ROS Melodic installed on Virtualbox
Using a cable to connect my PC and UR5e
In Virtualbox adapter bridged on Host PC’s ethernet adapter (which is connected with UR5e through a cable)

Really appreciate your help!!
Thank you

2

is the UR controller in local or remote mode?

3

Hi @filoucs , Do you mean the setting on the top-right of pendant? If yes that is in the local mode. If I switch to remote, I couldn’t start the external_control program, and the PC couldn’t get connected

4

Okay I finally solved the problem by using Ubuntu on host pc rather than using virtualbox VM…

Seems that virtual machines do influence the communication quality sometimes.

Thank you

5

I have the same mistake as you,Host PC Win11 with Ubuntu20.04 and ROS noetic installed on Virtualbox
Using a cable to connect my PC and UR5e
In Virtualbox adapter bridged on Host PC’s ethernet adapter (which is connected with UR5e through a cable),

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6

i don’t know how to fix this problem ,I am very eager for your help, thank you!