First ensure your wiring is correct. Next ensure the settings are correct.

From this topic;

Quote:

Forward should be Left Motor: 127 Right Motor: 255

Left should be Left Motor: 1 Right Motor: 255

Right should be Left Motor: 127 Right Motor: 128

Reverse should be Left Motor: 1 Right Motor: 128

Hope that helps.

Rich,

Thanks for the reply but I have 2 concerns.

I have double checked what you said but.....

1. should I use the sabretooth movement panel?

2. or should I use the modified servo movement panel

The help sections says to hook it up serial and there is another part of the site that says use the modified servo movement panel.

Problem is is I use the servo setup in R/C mode the bot does very sporatic movements not responding to commands and then just moves on its own sometimes.

When I use the serial connection it only seems to move one motor. This is the panel I get the most reliable movements ouot of but like I said its only moving one motor and its only using one of the signal channels.

Its weird.

I have double checked the wiring and I also verified it with dimension engineerings web site (The people who make the sabretooth)

Not sure where to go next.

Any help is very appreciated

Thanks

Use the sabertooth panel if you have it in simple serial mode, just adjust the values in the config as I believe they are incorrect as default - this may be the cause for only one motor moving.

I will definately verify that.

Thanks Rich and I will update this thred once I get to try this.

The help information about using the Modified servo panel with the Sabertooth in R/C mode is old and should be deleted now that ARC supports Serial Mode. Serial Mode has proved MUCH more reliable with Sabertooth owners.

Alan

Rich,

Thanks for the numbers they worked kind of

I think I just got the directions mixed up because up and down make it turn.

And left and right make it go forward or back.

I will play around with it and make it work from this point.

It does go really fast to fast for my bot I feel.

I am going to take the voltage down to 12v from 24v to see what that does but do you have any other suggestions?

Thanks again I was really baffeled and I must have got tunnel vision on another reason.

Mike

You could take the numbers down to slow it down.

127 is full on, drop it to 64. (and the same for the other numbers, reduce them by the same amount.

1 to 127 is one motor, 128 to 255 is the other motor so as long as you don't drop it below 128 for the second motor it should be OK.

And just jiggle the numbers around, look for the H-Bridge wiring help topic Josh asked the other day, I gave info on how the commands work, you can use that to work out how to make forwards become forwards etc. From the sounds of it you just need to swap over the forwards and reverse numbers for one side as it sounds like one of the motors is running in reverse when it should run forwards and vice versa. Alternately you could just reverse the polarity of the motor that spins backwards when you ask for it to move forwards.

Rich,

Thanks again this is working.

This was alot of help.

Take care,

Michael