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2017-04-30 02:57:15 -0500 marked best answer schunk_svh_driver - effort

Why when I call

rostopic echo /svh_controller/channel_feedback

I get:

name: ['Thumb_Flexion', 'Thumb_Opposition', 'Index_Finger_Distal', 'Index_Finger_Proximal', 'Middle_Finger_Distal', 'Middle_Finger_Proximal', 'Ring_Finger', 'Pinky', 'Finger_Spread']

position: [0.05220882358116796, 0.0899018990503464, 0.15354111584201746, 0.10189999742578948, 0.15404356030194322, 0.1026399974070955, 0.11117555604869267, 0.11235155605390901, 0.2843675514932329]

velocity: []

effort: []

and so I have value of current positions but I haven't value of velocity and effort? Then is the effort the contact force???

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2015-08-28 02:57:32 -0500 marked best answer schunk_svh_driver : grasps

Hi, can I read the values of the current or of contact force and decide to stop the hand if it touches an object?

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2015-06-09 09:52:37 -0500 marked best answer schunk_svh_driver:a finger has a hardware failure

Hi, I install package schunk_svh_driver calling:

sudo apt-get install ros-indigo-schunk-svh-driver

but the THUMB's schunk 5 finger hand that I'm using has a hardware failure and so I want disable_flags (1 and 2) calling:

roslaunch schunk_svh_driver svh_controller.launch disable_flags:=[true true false false false false false false false]

but I get the error:

roslaunch: error: The following input files do not exist: false].

How I can disable the thumb?

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2015-06-06 08:22:31 -0500 marked best answer schunk_svh_driver : Can't locate node svh_controller in package schunk_svh_driver

Hi, I download the packages schunk_svh_driver( Source: git https://github.com/fzi-forschungszent... ) in /opt/ros/indigo/share and so, I Install the package by calling: apt-get install ros-indigo-schunk-svh-driver, but if I launch the controller node by calling : roslaunch schunk_svh_driver svh_controller.launch standalone:=true I get an error:

ERROR: cannot launch node of type [schunk_svh_driver/svh_controller]: can't locate node [svh_controller] in package [schunk_svh_driver].

Can you help me please?

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2015-05-05 09:14:00 -0500 asked a question Schunk_svh_driver: effort and velocity channel_targets?

The file quick_commands shows how to set channel_targets:

rostopic pub /svh_controller/channel_targets sensor_msgs/JointState "header:
  seq: 0


stamp: {secs: 0, nsecs: 0}
  frame_id: ''
name: ['Index_Finger_Proximal','Index_Finger_Distal','Middle_Finger_Proximal','Middle_Finger_Distal','Ring_Finger','Pinky','Finger_Spread','Thumb_Flexion']
position: [0.8,1.3,0.8,1.3,0.9,0.9,0.5,0.3]
velocity: [0,0,0,0,0,0,0,0]
effort: [0,0,0,0,0,0,0,0]"

what does it mean with "velocity"? what is "effort"?

2015-05-05 09:08:46 -0500 asked a question Schunk_svh_driver: channel_targets

Hi, I can, with Schunk Hand call:

rostopic pub /svh_controller/channel_targets sensor_msgs/JointState "header:
    seq: 0
      stamp: {secs: 0, nsecs: 0}
      frame_id: ''
    name: 
['Index_Finger_Proximal','Index_Finger_Distal','Middle_Finger_Proximal','Middle_Finger_Distal','Ring_Finger','Pinky','Finger_Spread','Thumb_Flexion']
    position: [0.8,1.3,0.8,1.3,0.9,0.9,0.5,0.3]
    velocity: [0,0,0,0,0,0,0,0]
    effort: [0,0,0,0,0,0,0,0]"

can I correct desired position for better grip during the grasp?

2015-05-04 01:48:07 -0500 asked a question Schunk_svh_driver: how stop the motors if they touch an object?

I want that the motor stops if it touches an object, during the contact the motor reach a current limit (isn't it?) but the motors don't stop. Why? And is it possible to know values of actual current?

2015-05-01 04:34:05 -0500 commented answer Schunk_svh_driver : how stop the hand in case of contact with anything?

Sorry! I have a Schunk hand and I mena that the motor don't stop!

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2015-04-30 10:12:16 -0500 answered a question Schunk_svh_driver : how stop the hand in case of contact with anything?

I want that the motor stops if it touches an object, during the contact the motor reach a current limit (isn't it?) but the motors don't seem to stop. Why?

2015-04-30 09:55:20 -0500 asked a question Schunk_svh_driver : how stop the hand in case of contact with anything?

During the homing (or reset) if one of the motors touches an obstacle it stops. I wish also during the phase of achievement target position in case of contact with any object the motor concerned to stop. How can I do? Can I modify the topics?

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2015-04-29 10:00:11 -0500 asked a question Schunk_svh_driver:How to use channel_feedback in gui

Hi, can you help me to use the topic channel_feedback() in rqt-rviz? Can I use this topic to read values of current/effort and so adjourn position in the topic channel_target? Thank you.

2015-04-29 09:50:26 -0500 marked best answer schunk_svh_driver how to use "channel_feedback"

Hi, can you suggest me how to use the topic channel_feedback to control the grasps of objects online? Thank you.

2015-04-28 11:48:24 -0500 commented answer schunk_svh_driver - effort

"effort" isn't in the list of setted parameters.

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2015-04-28 11:16:29 -0500 commented answer schunk_svh_driver : grasps

I used the values in Yaml file but they are the parameters used to control. I want to read the current value of current/force. Is it possible?