EV3 robot does not move as expected

Wah

January 10, 2016 11:40

Using the TrashTrek mat, I tried to move the robot forward (straight) using the default 'Steering' block with speed preset to 50% with braking. I was expecting the wheels to turn 360, 720, 1080 and 1440 degrees for duration settings of 1, 2, 3 and 4 rotations respectively. But what I got instead is the results below based on the real time data as well as visual inspection of the wheels.

Settings Expected (deg) Results (degrees)
1 rotation 360 395 (360+35)
2 rotations 720 395 (360+35)
3 rotations 1080 755 (720+35)
4 rotations 1440 1155 (1080+35)

The results suggests that
a) for 1 rotation setting, the wheels rotate 395 deg which is 35 degrees more than it should.
b) for 2 rotation setting, the wheels rotate the same distance as 1 rotation setting above.
c) for 3 rotation setting, the wheels rotate 755 deg, which is 720+35 deg which suggest the wheel rotates 2 full rotation plus the error of 35 deg.
d) for 4 rotation setting, the wheels rotate 1155 deg which is 1080+35 which suggest the wheel rotates 3 full rotation plus the error of 35 deg.

It seems that the robot travels 1 rotation less than expected plus an error of 35 degrees with speed set to 50%.

Does everyone else see the same problem?
I am using v2.7.12346.0 trial

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• Official comment

  

  Cogmation Support

  January 11, 2016 16:39

  Hello,

  We apologize for the inconvenience caused. We are aware of this issue and it will be resolved in the next update that will be available soon.
  We appreciate the feedback.
  Should you have any other questions please feel free to contact us.

  Regards,
  Cogmation Robotics Support Team
• 

  Wah

  January 11, 2016 22:30

  I am glad to hear this issue will be fixed in the next update. Do you have a time frame when this update maybe available? If the simulated behavior of simple movement is close to actual, I would like to purchase a team license for the class.

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• 

  Cogmation Support

  January 11, 2016 22:47

  Hello,

  We are planning the 2016 release of the software sometime next month and that will have this update. We will send you an email notifying about the 2016 release and you can go on with the purchase then.

  Should you have any questions regarding the software feel free to contact us.

  Regards,
  Cogmation Robotics Support Team

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• 

  Wah

  January 11, 2016 22:54

  Since my current copy of the trial will expire before the next release, will it be possible for me to trial the next release before the purchase?

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• 

  Cogmation Support

  January 12, 2016 17:27

  Hello,

  Yes for sure! Once the 2016 release of the software is available, we will set you up with a 15 day trial for the same.

  Regards,
  Cogmation Robotics Support Team

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• 

  Wah

  March 28, 2016 04:31

  Is the 2016 release available yet? And if so, has the problem been resolved? Thanks.

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• 

  Cogmation Support

  March 29, 2016 15:47

  Hello,

  The 2016 version is in its testing stage as of now as currently, we are working on getting the WRO mats out for early April. However, the problem has been resolved and you have been added to the notification list. Once it is ready, we will definitely send you the trial version.

  Regards,
  Cogmation Robotics Support Team

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• 

  Wah

  June 18, 2016 03:31

  Hi,
  I am still waiting to hear some good news regarding the availability of the updated software for trialing. It has been more than 3 months since we heard the problem is fixed. Any update will be appreciated. Thanks.

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• 

  Chris Schulz

  June 19, 2016 21:20

  Wah, i'm think that there is now an updated version that resolves these issues.

  I will find out and let you know ASAP.

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• 

  Chris Schulz

  June 21, 2016 14:13

  The next version of the Virtual Robotics Toolkit is going to coincide with the upcoming release of the 2016 WRO challenge mats.

  Which is likely to be in late July.

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