Answers.Body: <p>Use your gyroscope sensor, set your program to have the Move Tank block turn very slowly in the "On" mode, and then use a Wait block checking the Gyro sensor until it sees an absolute change of 90 degrees. Then add a Move Tank "Off" block. That's the closest you will come to 90 degrees.</p>
  
Answers.ContentLicense: CC BY-SA 3.0
Answers.CreationDate: 2017-05-07T10:55:22.233Z
Answers.LastActivityDate: 2017-05-07T10:55:22.233Z
Answers.UserDisplayName: Phil B.
Body: <p>I'm making a program for my ev3rstorm and I want it to have a 90-degree <a href="http://www.education.rec.ri.cmu.edu/content/electronics/boe/robot_motion/5.html" rel="nofollow noreferrer">spin turn</a>. I use the standard part ev3rstorm wheelbase or rather, treadbase. Using the move tank block (I use that block all the time) how long should I move back/forward at 75/-75 power?</p>
  
  <p>Wheel picture:</p>
  
  <p><a href="https://i.sstatic.net/6UyqQ.png" rel="nofollow noreferrer"><img src="https://i.sstatic.net/6UyqQ.png" alt="enter image description here"></a></p>
  
Tags: <ev3><programming><robotic>
Title: A 90 degree turn with Wheel part number 56145
UserDisplayName: Hazard
ThreadText: # A 90 degree turn with Wheel part number 56145
  
  (Asked by: username_0 on 2017-05-07)
  
  I'm making a program for my ev3rstorm and I want it to have a 90-degree [spin turn](http://www.education.rec.ri.cmu.edu/content/electronics/boe/robot_motion/5.html). I use the standard part ev3rstorm wheelbase or rather, treadbase. Using the move tank block (I use that block all the time) how long should I move back/forward at 75/-75 power?
  
  Wheel picture:
  
  [![enter image description here](https://i.sstatic.net/6UyqQ.png)](https://i.sstatic.net/6UyqQ.png)
  
  **Tags:** ev3, programming, robotic
  
  
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  ## 1 answers
  
  ### Answer by username_1 on 2017-05-07. Score: 2
  
  Use your gyroscope sensor, set your program to have the Move Tank block turn very slowly in the "On" mode, and then use a Wait block checking the Gyro sensor until it sees an absolute change of 90 degrees. Then add a Move Tank "Off" block. That's the closest you will come to 90 degrees.
  
  
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