Answers.Body: <p>According to <a href="http://thetechnicgear.com/2014/01/lego-mindstorms-ev3-spik3r-review/" rel="nofollow noreferrer">this article</a>, the turning is supposed to function via a</p>
  
  <blockquote>
    <p>wheel on the bottom that while the car moves forward stays straight but that once the car moves backward moves a little to the side and forces the car to turn.</p>
  </blockquote>
  
  <p>If correctly built, it should look like this: 
  <a href="https://i.sstatic.net/0YUmh.jpg" rel="nofollow noreferrer"><img src="https://i.sstatic.net/0YUmh.jpg" alt="enter image description here"></a></p>
  
  <p>A bit later the article offers a few tips on troubleshooting, among which there is your issue as well:</p>
  
  <blockquote>
    <p>Problem: My Spik3r doesn’t turn</p>
    
    <p>This looks like a construction problem. Check the above photo to see how the flying wheel is supposed to look like.</p>
  </blockquote>
  
  <hr>
  
  <h2>Edit after an update to the question</h2>
  
  <p>The wheel marked with the red free-hand circle is meant to slide freely in forward motion (the head of Spik3r is seen at the bottom of the picture), as it is pivoting around the axle with the yellow half-bushes, and get stuck in reverse (as the blue pin catches on the black undercarriage), thereby braking that side of the Spik3r and causing the model to turn towards that side.</p>
  
  <p><a href="https://i.sstatic.net/fUNvE.jpg" rel="nofollow noreferrer"><img src="https://i.sstatic.net/fUNvE.jpg" alt="Bottom view of the Spik3r, with the wheel responsible for the turning marked"></a></p>
  
  <p>If this wheel gets stuck during reverse, then it is working as intended and should provide enough friction to turn the whole model.</p>
  
  <p>If it does not get stuck, then it is due to a mistake in the build.</p>
  
  <p>If it gets stuck but does not force the model to turn, then you might need to change the friction between the wheel and the ground it's running on (e.g. use it on a carpet or any other surface rougher than the polished hardwood shown in the background).</p>
  
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2020-02-03T12:57:47.513Z
Answers.Text: @Deatroyer You're welcome! Feel free to read the [tour] and the [help] pages, and don't forget to click the checkmark icon to show that the answer has helped to solve your issue.
Answers.UserDisplayName: zovits
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2020-02-03T13:40:31.253Z
Answers.Text: Thank you but I'm sorry I've didn't sad it correctly it works once but when it goes forward it just ruins the wheel and then! It is not working
Answers.UserDisplayName: Deatroyer
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2020-06-06T13:51:32.767Z
Answers.Text: @Deatroyer Wdym "ruins the wheel"?
Answers.UserDisplayName: mindstormsboi
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2020-02-03T11:13:20.493Z
Answers.LastActivityDate: 2020-02-03T16:00:55.027Z
Answers.LastEditDate: 2020-02-03T16:00:55.027Z
Answers.UserDisplayName: zovits
Body: <p>When I use the button for turning it just goes backwards. Why does this happen? I've checked the instructions and didn't find anything.</p>
  
  <p><img src="https://i.sstatic.net/jzbe8.jpg" alt="Bottom view of the assembled Spik3r"></p>
  
Comments.ContentLicense: CC BY-SA 4.0
Comments.CreationDate: 2020-02-03T13:45:04.943Z
Comments.Text: Thank you but I'm sorry I've didn't sad it correctly. It works once but when it goes forward it just ruins the wheel and then. It is not working.
Comments.UserDisplayName: Deatroyer
Comments.ContentLicense: CC BY-SA 4.0
Comments.CreationDate: 2020-02-03T13:48:59.773Z
Comments.Text: What do you mean by "ruins the wheel" and "It is not working"? Could you please post images, videos or detailed descriptions of the encountered situation?
Comments.UserDisplayName: zovits
Comments.ContentLicense: CC BY-SA 4.0
Comments.CreationDate: 2020-02-03T15:35:40.450Z
Comments.Text: I've „meant ruins the position of the wheel and it's tilt" so it can't turn.
Comments.UserDisplayName: Deatroyer
Comments.ContentLicense: CC BY-SA 4.0
Comments.CreationDate: 2020-02-03T16:03:01.423Z
Comments.Text: I have updated my answer below, check if any of that helps.
Comments.UserDisplayName: zovits
Tags: <ev3><mindstorms><building>
Title: My Mindstorms Spik3r can't turn around
UserDisplayName: Deatroyer
ThreadText: # My Mindstorms Spik3r can't turn around
  
  (Asked by: username_0 on 2020-02-02)
  
  When I use the button for turning it just goes backwards. Why does this happen? I've checked the instructions and didn't find anything.
  
  ![Bottom view of the assembled Spik3r](https://i.sstatic.net/jzbe8.jpg)
  
  **Tags:** ev3, mindstorms, building
  > **Comments:**
  > **username_0**: Thank you but I'm sorry I've didn't sad it correctly. It works once but when it goes forward it just ruins the wheel and then. It is not working.  
  > **username_1**: What do you mean by "ruins the wheel" and "It is not working"? Could you please post images, videos or detailed descriptions of the encountered situation?  
  > **username_0**: I've „meant ruins the position of the wheel and it's tilt" so it can't turn.  
  > **username_1**: I have updated my answer below, check if any of that helps.  
  
  ---
  
  ## 1 answers
  
  ### Answer by username_1 on 2020-02-03. Score: 5
  
  According to [this article](http://thetechnicgear.com/2014/01/lego-mindstorms-ev3-spik3r-review/), the turning is supposed to function via a
  
  > wheel on the bottom that while the car moves forward stays straight but that once the car moves backward moves a little to the side and forces the car to turn.
  
  If correctly built, it should look like this:
  [![enter image description here](https://i.sstatic.net/0YUmh.jpg)](https://i.sstatic.net/0YUmh.jpg)
  
  A bit later the article offers a few tips on troubleshooting, among which there is your issue as well:
  
  > Problem: My Spik3r doesn’t turn
  >
  > This looks like a construction problem. Check the above photo to see how the flying wheel is supposed to look like.
  
  ---
  
  ## Edit after an update to the question
  
  The wheel marked with the red free-hand circle is meant to slide freely in forward motion (the head of Spik3r is seen at the bottom of the picture), as it is pivoting around the axle with the yellow half-bushes, and get stuck in reverse (as the blue pin catches on the black undercarriage), thereby braking that side of the Spik3r and causing the model to turn towards that side.
  
  [![Bottom view of the Spik3r, with the wheel responsible for the turning marked](https://i.sstatic.net/fUNvE.jpg)](https://i.sstatic.net/fUNvE.jpg)
  
  If this wheel gets stuck during reverse, then it is working as intended and should provide enough friction to turn the whole model.
  
  If it does not get stuck, then it is due to a mistake in the build.
  
  If it gets stuck but does not force the model to turn, then you might need to change the friction between the wheel and the ground it's running on (e.g. use it on a carpet or any other surface rougher than the polished hardwood shown in the background).
  
  > **Comments:**
  > **username_1**: @Deatroyer You're welcome! Feel free to read the [tour] and the [help] pages, and don't forget to click the checkmark icon to show that the answer has helped to solve your issue.  
  > **username_0**: Thank you but I'm sorry I've didn't sad it correctly it works once but when it goes forward it just ruins the wheel and then! It is not working  
  > **username_2**: @Deatroyer Wdym "ruins the wheel"?  
  
  ---
  
  