New Roli Wired Per Instructions But Forward And Backward Are Reversed In Control

mstephens_42

USA

Asked Jul 2015 — Edited Jul 2015

Resolved by Steve G!

I have a new roli. This one for prototyping at work. When I added movement controls in the EZ builder, forward it backward and backward is forward. What is wrong?

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Steve G

United Kingdom

#1 Jul 2015

It sounds like the wiring on the L298 H-bridge is back to front. You can swap the wires around and test to make sure they move in the right direction. Below is a great tutorial created by a forum member that explains how to connect a H-Bridge to an EZ-B, and how to troubleshoot when the motors turn the wrong way...

L298 H-bridge tutorial

And here is the official EZ-Robot tutorial for setting up the H-Bridge for Roli...

www.ez-robot.com/Tutorials/Lesson/44?courseId=3

That should help you get get your Roli rolling the correct way. Let us know how you get on.

Dunning-Kruger

Canada

#2 Jul 2015

Your Roli is obviously defective... I'll take it off your hands for $50....

Kidding .... check the H-bridge/motor wiring

Steve G

United Kingdom

#3 Jul 2015

@mstephens_42

One other EZ-Robot tutorial link I forgot to post. Below is a link with information of what to do when a Roli has exactly the same symptoms as your's is having, and explains what the wiring on the actual H-Bridge itself should look like...

H-Bridge internal wiring

Hope that helps.