Need Help On Hbridge, Please

MovieMaker

USA

Asked Sep 2013 — Edited Sep 2013

Resolved by Rich!

Skip to comments Jump To End

OK, I have:

Left trigger A 16 Left trigger B 17 Right trigger A 18 Right trigger B 19

When I hit forward, it goes to the right. when I hit backward, it goes to the left. when I hit Right it goes forward. and when I hit Left it goes backwards.

How can I fix this?

Thanks in Advance.

Upgrade to ARC Pro

Experience early access to the latest features and updates. You'll have everything that is needed to unleash your robot's potential.

Compare Pro Features View Subscription Plans

Rich

United Kingdom

#1 Sep 2013

In ARC change your ports for the H-Bridge.

Think logically, since it turns right when you hit forward you know the right motor must be spinning backwards when it should spin forwards. This indicates the right triggers are around backwards. This is confirmed by the other behaviour.

So change Right Trigger A to 19 and Right Trigger B to 18, that should fix it.

Additional info For information (in case you wanted to know how to figure it out) To move forwards the motors must; Left: Forwards Right: Forwards

To move reverse the motors must; Left: Reverse Right: Reverse

To move left the motors must; Left: Reverse Right: Forwards

To move right the motors must; Left: Forwards Right: Reverse

So, if it's turning right when it should go forwards the motors are; Left: Forwards Right: Reverse When they should be; Left: Forwards Right: Forwards So the right triggers appear to be backwards. Swap them around and check.

MovieMaker

USA

#2 Sep 2013

Once again, Thank You for sharing your genius with us.

Now it moves forward as directed and backwards as told. Since I put the top on in reverse, the backwards goes way faster than the forward. When it tries to move Left, it moves so slowly. when it tries to move Right, it just gives it a BUMP in the right direction. But you have solved for the direction problem. It could be that my batteries are low.

Thank You!