Re: [oopic] PWM freq choice

Thank you for noting that. I was avoiding the R/C signal for no good reason.
I have now tested using the oServo object, and it works very well. I turned
on the exponential, and will now test it with the exponential turned off,
because I think I have a broad 0 point.

However, I have a really interesting result with Position values below 10,
or above 50. The 0 point is right around 30, with values of 40-50 being one
direction, and 10-20 being the other direction. Once I get outside of those
ranges, one track moves at a good speed, while the other track doesn't move
at all. Of course, I can use this for a strange kind of skid-steer turn, but
I don't understand why it is happening at all.

I also tried values for Position higher than the stated range of 63, which
was no different from values around 60. I see two different ranges for
Position in the documentation. In the text, the range is 0-63, but in the
table, the range is 0-127. I don't really care, but I'm curious what is
happening when I get out of range.

Just tested the linnear range, and it is an excellent setting. Still getting
the odd single-wing drag when I get out of the 10-50 range, but excellent
behavior within that range, which is fine with me.

Thank you for all your help, I now have a solution that is pretty much
ideal.

rtstofer wrote:
>
>
>> As for the serial, I'd have to look at that. It sure seems like a
> reasonable
>> way to go, but sending signals isn't really the issue. Getting the
> motors
>> running isn't really the issue, for that matter, that's working
> fine, just
>> getting them to stop is an issue, and the relays will be necessary
> for that.
>
> Read the manual again! If you use R/C mode, the drive will
> automatically stop when you quit sending pulses. That's the failsafe
> feature. Look at the .operate property of the oServo object.
>
> The serial mode will also get the motors to stop.
>
> The only mode that will have a problem is 'analog' because it wants a
> voltge of mid-scale to stop. Given the 'exponential' capability, this
> may be easy to overcome as well.
>
> Richard
>
>
>
>

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