Lynxmotion AL5D

Lynxmotion Robot Arms
1

Hi,

I just build the Lynxmotion AL5D (we bought the kit with the Medium Duty Wrist Rotate Upgrade). When testing it with the SSC-32 Servo Sequencer Utility, the arm has problems to move to the “Center All” position. The SSC-32U flashes the red LED. After trying several times (sometime with helping the arm manually) he will eventually move to the center position. After this, I can move all servo’s one at the time, but sometime the arm blocks again with the red LED.

Any idea what the problem could be?

Best Regards,

Geert De Paepe

DSC_0119.JPG
DSC_0119.JPG4288×2848 2.9 MB

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DSC_0122.JPG4288×2848 3.38 MB

DSC_0125.JPG
DSC_0125.JPG4288×2848 3.26 MB

2

Hi Geert,

To help resolve this situation we will need more information on your setup. Please provide us with one or more pictures clearly showing all jumpers and connections to the controller board. Also take pictures of the arm assembly itself, too.

Please also provide any other information about this issue. You can also post a video of the current arm behavior.

Sincerely,

3

video’s added:

4

Hi,

Thank you for all the information, pictures and videos. Some good news: all your wiring on the SSC-32U doesn’t seem to have any mistakes. We assume from the pictures/videos that you are using the power supply provided with the kit. Is that the case?

There seems to be a power issue with the setup which may indicate either miswiring in the extensions servo cables or a defective servo motor. Please verify that all servo extension cables are properly wired to the ones connected to the SSC-32U (yellow to yellow, black to black at each connection).

Try the following two tests:

]Disconnect all servos from the SSC-32U except the shoulder servo. Power-up the board and connect with the sequencer. Then, try to move the should servo only. What happens then?/:m]
]Reconnect all servos appropriately to the SSC-32U except for the shoulder servo. Power-up the board and connect with the sequencer. Then, try to move all connected servos individually (base, elbow, wrist, gripper and wrist rotate). What happens in this test?/:m]
Some videos of these tests would probably make it easier to troubleshoot what is happening to your robotic arm kit.

Sincerely,

5

Hi Sébastien,

Thanks! Here the feedback:

  • power supply is indeed from the kit
  • extension cables are OK
  • only shoulder connected: not working (see video)
  • all servo’s connected except shoulder: this works (see 2 video’s)

Best Regards,

Geert
DSCI0178.AVI.zip (5.83 MB)
DSCI0175.AVI.zip (4.22 MB)
DSCI0174.AVI.zip (4.74 MB)

6

Hi Geert,

This would seem to indicate a defective servo at the shoulder, the RB-Hit-32 (HS-805BB Giant Scale Servo Motor).

Please open a support ticket with us (choose Exchanges/Returns department) and provide a link to this thread in your message.

Also, when you remove the shoulder servo motor, make sure the C bracket connection on the opposite side of the servo horn is not over tighten as this can cause issues / strain motors.

Sincerely,

7

Hi Sébastien,

I replaced the shoulder servo. However the problem remains (exactly the same behaviour as before).

Best Regards,

Geert

8

Hi Geert,

Simply reply to the last message/email you received from us through our support center to re-open the ticket. This will allow for easier troubleshooting and follow-up.

Sincerely,