Grip not opening

uArm Serial No.: (the No. at the bottom of each uArm reading “UARM-F0C77FFCB552”)
Firmware Version: 2.3.6
Operation System: Linux
uArm Controlling Method: uArm Studio 1.1.15-a1


I have two questions.
Is it normal that a uARM Swift moves shaky. Is this the difference between 5mm and 0.2 mm of precision?

The second is a real problem. The grip once it close it cannot be open (I have to remove the plug and put it agin to make it open).
The grip continues doing a strange noise.
The issue doesn’t happen if I put an object, though it continues making the strange noise. The grip worked only about 4-5 time before having this behaviour:

Hi, the uArm Studiio Version for uArm Swift is v1.1.13-p5. Please try it on this version. If it’s not working please send Email to

I wrote to few days ago with no answer.
I have made a video with blockly and still the problem persists.

I used a key to close and the grip and another to open it. The grip closes but never opens again. I have to reset the arm to bring it back to normal status.
the uarm studio or the firmware is updated (no update is available):
uarm studio 1.1.15-a1 (it is not uploading to 1.1.13-p5)
uArm Firmware 2.3.6
Serial Number F0C77FFCB552
Studio Channel prod
OS linux x64 4.13.0-32-generic
uArmCore Version 0.8.2

Best regards,


Hi, we are sorry for late reply during Chinese New Year holiday. You could download right version(1.1.13-p5) of uArm Studio here:
And then test the gripper, do not send the command too frequently(wait 3-4 seconds until the gripper finish the move and send another command) or it will be blocked and will not open until you remove the USB cable.