Need help with UR5 & Robotiq 2F-85 gripper control via HMI

[piyush.jain]

Hello everyone,

I need some assistance with my setup.

I am working with a UR5 robot equipped with a CB3 controller, purchased in February 2018, running Polyscope 3.5.3. Attached to the robot is a Robotiq 2F-85 gripper, and on top of the gripper, there is a Robotiq force sensor. The gripper is connected to the CB3 controller via a USB-A cable, while the CB3 controller is linked to a Windows laptop via an Ethernet cable.

I am developing an HMI using Python 3.10 on Windows 10 and utilizing the ur_rtde Python package for communication with the controller.

Issue:
I am unable to activate, open, or close the gripper via the HMI. I have tried multiple versions of code available on various forums, but none have successfully controlled the gripper.

I am communicating via PORT 30004 using RTDE, but I cannot even execute basic gripper movements.

Could someone please provide guidance or share a working example of the code to activate and control the gripper via HMI?

[cg1]

Answered a very simular Question the other day, and you might have a similar issue?

Unknown Function: findmodel

Yeah that properly why then. one of the things a URCap does is basically to define a bunch of functions in the top of any script file created through the teach pendant to give you new functionality. while I have never used Robotiq I bet you will find the findmodel function you are looking here. But this also means that you cant just use external programs like what you are doing now, and as the guy in the post did. As these functions simply is not defined in the script file you create on you …

But please also try sending your script to the primary or secondary interface.
https://www.universal-robots.com/articles/ur/interface-communication/overview-of-client-interfaces/