Interesting weak point on the Kondo motors

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4 postsPage 1 of 1

Interesting weak point on the Kondo motors

Post by inaki » Sat Mar 05, 2005 7:02 pm

Post by inaki
Sat Mar 05, 2005 7:02 pm

After having two motors dead I have decided to check them out to see what happens. The problem has been the same in both cases: the terminal for M+ in the pcb board of the servos was not making contact. A touch with my iron solder and voila! they work again.

See the detail of the not contacting pin on the picture below:
Bad pin is marked with a white arrow in the picture.
(please do not click on the image because it will lead you to advertising)

[img][img]http://img193.exs.cx/img193/8619/badservo1xp.th.jpg[/img][/img]
After having two motors dead I have decided to check them out to see what happens. The problem has been the same in both cases: the terminal for M+ in the pcb board of the servos was not making contact. A touch with my iron solder and voila! they work again.

See the detail of the not contacting pin on the picture below:
Bad pin is marked with a white arrow in the picture.
(please do not click on the image because it will lead you to advertising)

[img][img]http://img193.exs.cx/img193/8619/badservo1xp.th.jpg[/img][/img]
inaki offline

Post by robosavvy » Sun Mar 06, 2005 1:58 am

Post by robosavvy
Sun Mar 06, 2005 1:58 am

inaki wrote:After having two motors dead I have decided to check them out to see what happens. The problem has been the same in both cases: the terminal for M+ in the pcb board of the servos was not making contact. A touch with my iron solder and voila! they work again.

See the detail of the not contacting pin on the picture below:
Bad pin is marked with a white arrow in the picture.
(please do not click on the image because it will lead you to advertising)

Image


It's great that you managed to fix the problem with the servo!
A message about this has been sent to Kondo.

Please register to the form and benefit from 70M of free space where you can upload pictures, video clips, gait files etc. Surely other people will benefit from your shared experience constructing your KHR-1, programming it, running downloaded gaits, installing the radio control, teaching it to do interesting stuff.. :D
inaki wrote:After having two motors dead I have decided to check them out to see what happens. The problem has been the same in both cases: the terminal for M+ in the pcb board of the servos was not making contact. A touch with my iron solder and voila! they work again.

See the detail of the not contacting pin on the picture below:
Bad pin is marked with a white arrow in the picture.
(please do not click on the image because it will lead you to advertising)

Image


It's great that you managed to fix the problem with the servo!
A message about this has been sent to Kondo.

Please register to the form and benefit from 70M of free space where you can upload pictures, video clips, gait files etc. Surely other people will benefit from your shared experience constructing your KHR-1, programming it, running downloaded gaits, installing the radio control, teaching it to do interesting stuff.. :D
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Post by Guest » Wed Mar 09, 2005 4:51 pm

Post by Guest
Wed Mar 09, 2005 4:51 pm

This problem is more frequent than I expected. This happens because the motor is actualy soldered directly to the M+/M- terminals without any other structure that holds it. Any effort on the motor will affect these terminal an eventualy will break and disconnect them. It is a HUGE design error by the side of Kondo. If you have a motor that suddenly seems to be non working or works on and off it is very likely due to this problem.
This problem is more frequent than I expected. This happens because the motor is actualy soldered directly to the M+/M- terminals without any other structure that holds it. Any effort on the motor will affect these terminal an eventualy will break and disconnect them. It is a HUGE design error by the side of Kondo. If you have a motor that suddenly seems to be non working or works on and off it is very likely due to this problem.
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Same here

Post by Zain » Sun Apr 24, 2005 9:32 pm

Post by Zain
Sun Apr 24, 2005 9:32 pm

Nope, this is not isolated. I just fixed one of my servos exhibiting the same problem. In fact it went bad immediately - during assembly.
Nope, this is not isolated. I just fixed one of my servos exhibiting the same problem. In fact it went bad immediately - during assembly.
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