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Legacy Personal Blogs xArm Robotic Arm #5 : Assembled and Working Robot Arm (Sort of)
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  • Author Author: dubbie
  • Date Created: 5 Mar 2019 11:12 AM Date Created
  • Views 2291 views
  • Likes 8 likes
  • Comments 5 comments
  • robotic arm
  • xarm
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xArm Robotic Arm #5 : Assembled and Working Robot Arm (Sort of)

dubbie
dubbie
5 Mar 2019

eI have now re-assembled the robot arm more correctly and connected all the wiring together and it is all working, sort of!

 

I downloaded the correct software now as I think the software I was looking at in Blog4 was the right one. LewanSoul make all their software downloads available in the same place so you have to look for the right one rather than just download what shows on the robot you are looking at. Anyway, once downloaded and everything plugged in it started to work. I wasn't sure why, I must have done something somewhere, but now it works:

 

image

 

The software provided allows  the user to test each servo motor individually to make sure it is working, as well as allowing a sequence of 'actions' to be inserted into a list and then replayed. Fairly normal for a robot arm. It also seems to provide alternative modes of control such as a handheld controller and even physically moving the robot and storing the arm angles values, although I think I am some way from that at present.

 

 

Unfortunately I have assembled the robot arm with the servo motors in the wrong positions. I didn't find anything in the video instruction assembly manuals that gave any indication of the sequencing of the motors. They all have unique id numbers from 1 to 6. The gripper is ID1 but this isn't marked on the motor, so I assumed it was ID 6 and assembled the motors in an incorrect sequence. See video:

 

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All I have to do now is to completely disassemble the robot arm and put it back together with the motors in the correct sequence, which will be more fun. It is of a good enough quality of manufacture to seem to be able to do this without any detriment. Once I have done that I will be able to calibrate all the motors.

 

Dubbie

 

PS I'm not sure whether to be worried by this but I seem to have quite a number of different types of screws and bolts left over and it doesn't seem there is anywhere to put them. Still, it seems to work so maybe they are spares!

 

image

 

 

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Top Comments

  • genebren
    genebren over 6 years ago +2
    Well done! Things seem to be moving along nicely given that you did not have proper documentation (written) on how to assemble/hook-up everything. Looking forward to seeing some great videos of the arm…
  • DAB
    DAB over 6 years ago +2
    I would think that a proper order for motor assembly would be at the top of a must inform the buyer about. I am glad you found that out, but shame on the manufacturer for not doing a proper job of helping…
  • dubbie
    dubbie over 6 years ago in reply to DAB +1
    DAB, The information on servo sequence is there but it is in the software itself, rather than the assembly information. I didn't download the software until I'd assembled the robot arm so didn't see it…
  • dubbie
    dubbie over 5 years ago in reply to galenm

    Galen,

     

    You;ll have to Blog some of the details. Regretfully I have not touched mine since I messed up the servo ordering - I still do not have to properly recalibrated yet.

     

    Dubbie

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  • galenm
    galenm over 5 years ago in reply to dubbie

    Tthanks for the heads up on servo location. I will download software to see servo location. Just in time for me.

    i Am planning to fasten mine to a plywood base.

    Planning to show mine at the local Maker Faire

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  • dubbie
    dubbie over 6 years ago in reply to DAB

    DAB,

     

    The information on servo sequence is there but it is in the software itself, rather than the assembly information. I didn't download the software until I'd assembled the robot arm so didn't see it until too late. Also, the servo on the pre-assembled gripper is servo 1 but it is the only servo not marked so I assumed it was number 6. Looking back I can see that I wasn't too bright because if I had checked the other servos for their IDs I would have noticed that I had 2 to 6 making the gripper No 1.

     

    Dubbie

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  • DAB
    DAB over 6 years ago

    I would think that a proper order for motor assembly would be at the top of a must inform the buyer about.

     

    I am glad you found that out, but shame on the manufacturer for not doing a proper job of helping the user build the device.

     

    DAB

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  • genebren
    genebren over 6 years ago

    Well done!  Things seem to be moving along nicely given that you did not have proper documentation (written) on how to assemble/hook-up everything.

     

    Looking forward to seeing some great videos of the arm picking up and moving stuff around.

     

    Gene

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