:::ROBOTIS::: - Overload Error on MX-28

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Overload Error on MX-28

조회 수 2563 추천 수 0 2012.03.21 22:48:14

Aneoshun *.157.18.251 http://www.robotis.com/xe/120278

Hi,

When I use a MX-28, I get sometimes an overload error.

In order to remove the alarm, I reset the Torque limit value like it's explained here http://www.robotis.com/xe/?mid=qna_en&search_keyword=error&search_target=title&document_srl=77594.( register 34 and 35 torque limit = 03 FF).

I can see the MX-28 moving again during a very very short moment, but just after that it loses its torque again (Torque limit =0 and the servo is in overload error) (even if I remove the load on the servo).

It seems that the torque is correctly reset during a short moment, but not the alarm flag. This could explain why the Torque limit is immediatly and automaticly reset to 0.

I succesfully tested my function which reset the Torque limit register on AX12+ and AX18 without any probleme.

The firmware version of the MX-28 is 0x1E (version 30).

Should I do something special when an overload error occurs on MX-28 in order to let it move again?

Regards.

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댓글 '7'

2012.03.22 01:28:16
*.137.20.72

If it is an over-temperature alarm, the motor and electronics will have to cool off a bit before the alarm will no longer occur (or increase the alarm temperature - which is not recommended). To speed up the cooling, you could try some compressed air/coolant as was required by competitors here. CO2 spray cans used for dusting electronics could work (spray them upside down and you get the liquid which is much, much colder and may cause damage to human and bot alike).

2012.03.22 05:22:53
*.178.11.47

Thank you for your reply,

The error is not an over-temperature alarm. I checked with robotPlus that the error is really an overload one. The error arrives sometimes juste after the start up of my robot, so I can be certain that it's not an over-temperature alarm.

2012.03.26 18:13:05
*.157.18.251

No idea?

It's really a boring problem. I can't correctly use my MX-28 because of that!

2012.03.27 14:33:27
*.112.9.210

Aneoshun,

First of all, are you sure it's an overload shutdown? When the symptoms you mention above happen, can you send the status packer?

The instruction packet doesn't really matter. It may be an overheat shutdown like NaN mentioned.

Secondly, if you repeatedly set the goal position before it arrives, the overload shutdown can kick in. Try setting the goal position AFTER it arrives.

ROBOTIS

2012.04.02 16:36:55
*.157.18.251

Thank you for your reply,

Yes, I'm sure it's an Overload Shutdown because I can see it explicitly with RobotPlus.

It could be normal to have this error knowing the current load on my servo and this is not a problem.

But I don't understand why I can't remove this error without un-plug and re-plug the power cable.(This remove immediatly the error which should not happen if it's an overHeat shutdown?)

As I mention above, I re-wrote the torque limit value, but the alarm was not removed.

I did the same with Ax-12 and Ax-18 and it worked.