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Asked — Edited
Resolved Resolved by Steve G!

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

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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Synthiam
United Kingdom
#1  
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.
#2  
Your Roli is obviously defective... I'll take it off your hands for $50....:D




Kidding .... check the H-bridge/motor wiring:)
United Kingdom
#3  
@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.
#4  
The wiring was a mirror image of what it was supposed to be inside Rolli. Corrected it and all is well. Thanks.
United Kingdom
#5  
No worries, and pleased to hear you got it sorted.:)