The problem of fingers mysteriously opening and closing when using "sendJointVelocityCommand".

[miyukin73]

Hello,

Currently, using MATLAB2021a,
I would like to send a "velocity" command to Jaco2
using "sendJointVelocityCommand" to move the joint angle.

However, when I send a "velocity" command, the finger to which I have not sent any command opens and closes unnaturally, as shown in the attached movie.

FullSizeRender.MOV

However, the above problem does not occur when sending an angle command using "sendJointPositionCommand" or when operating with a controller.

Also, sometimes the above problem does not occur when sending a “velocity” command, but I do not know the cause.

Are there any possible causes and remedies?
Thank you in advance.