<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>

CC BY-SA 3.0
2017-05-07T10:55:22.233Z
2017-05-07T10:55:22.233Z
Phil B.
<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>

<ev3><programming><robotic>
A 90 degree turn with Wheel part number 56145
Hazard
# 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


---

## 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.


---

