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Robi arms are not working. Options
pwoong
#1 Posted : 25 August 2018 23:35:05

Rank: Newbie

Groups: Registered

Joined: 28/07/2017
Posts: 3
Points: 9
Location: California, USA
Hi Builders,

I have a issue of arm function as below.

The first wake up was success.
He sat using his arm, after that his arms not working.
I tested all functions using test program again, all functions were working well except both arms.

I did reassemble all arm servo motors and reconnected cables. It worked again.
But after using his arms to sit and stand up, two arms are stop working now.
He danced and push-ups, all functions were fine.

I tested it to figure out problem at this time as below.

1. Change the test SD card to test all functions. Both arms are not working. Other functions are perfect.
2. Disconnected the left arm connector from main board. Right arm are working again. Other functions are working good.
3. Disconnected right arm connector and connected left arm connector from main board. Both arms are not working. Other functions are working well.

It seems not cable problem. One arm is working by test program.
Main board problem?
Do I need to disassemble arms and reconnect cable again?

Do you have any thoughts about this problem.
Please advise me to fix my Robi.

Thank you.

Peter


arpurchase
#2 Posted : 25 August 2018 23:59:55

Rank: Super-Elite

Publisher Medal: Featured Build of the MonthActive Service Medal: 500 post active service MedalPurple Medal: Super active service medal for 1000 postsRed Medal: Red MedalTurquoise Medal: Turquoise Medal for model making know-how contributionOutstanding Build: An award for an outstanding buildBuild-Diary Medal: Build-Diary Medal of Honour
Groups: Registered

Joined: 27/09/2011
Posts: 15,210
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Location: Dudley
Hi Peter

Firstly welcome to the forum. What you need to do is leave more loose wire at the shoulders where the movement takes place. Not getting this just right can cause the problems you are having. Leave as much wire as possible at the shoulder and just enough to fit the wire to the main board.

Andy
Current builds:-C57,Zero, Lamborghini Countach, Caldercraft HMS Agamemnon,Robi,R2-D2, MFH Cobra .

pwoong
#3 Posted : 26 August 2018 00:08:41

Rank: Newbie

Groups: Registered

Joined: 28/07/2017
Posts: 3
Points: 9
Location: California, USA
Hi Andy,

Thank you for quick response.

Do I need to rewire both shoulders or just left shoulder one?
As I mentioned right arm is working without left arm connecting.

Actually, this is second time happening.

Thank you.

Peter
arpurchase
#4 Posted : 26 August 2018 00:21:07

Rank: Super-Elite

Publisher Medal: Featured Build of the MonthActive Service Medal: 500 post active service MedalPurple Medal: Super active service medal for 1000 postsRed Medal: Red MedalTurquoise Medal: Turquoise Medal for model making know-how contributionOutstanding Build: An award for an outstanding buildBuild-Diary Medal: Build-Diary Medal of Honour
Groups: Registered

Joined: 27/09/2011
Posts: 15,210
Points: 46,177
Location: Dudley
Hi Peter

The left arm wire should be re-installed, one fix someone did was to reroute the servo wire so it did not pass through the speaker box but behind it.

Andy
Current builds:-C57,Zero, Lamborghini Countach, Caldercraft HMS Agamemnon,Robi,R2-D2, MFH Cobra .

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