Night & Day

[Mark McLeod]

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[DavidGitz]

I wonder what the difference is on the digital output of the dig. sidecar between the victor pwm VI and the jaguar pwm VI. If someone could check this with an o-scope that would be pretty cool.

[billbo911]

Originally Posted by DavidGitz

I wonder what the difference is on the digital output of the dig. sidecar between the victor pwm VI and the jaguar pwm VI. If someone could check this with an o-scope that would be pretty cool.

I believe one difference is the Victor update (PWM Frequency) is 50 Hz as apposed to 100Hz for the Jaguar.

[Kingofl337]

correct - update rates
Servo 20ms
Victor 10ms
Jaguar 5ms

[JesseK]

I wonder if the Jaguar has to be calibrated like the victor. First thing we should test is if the 'neutral' of the Jaguar is truly 127. There's a 'calibrating a victor' thread around here somewhere and I won't have a chance to even ask our team to do it until Tuesday.

[robostangs548]

Calibrate, With it's mini-computer like size, it should calibrate and program itself. LOL

[Nate Smith]

Originally Posted by JesseK

I wonder if the Jaguar has to be calibrated like the victor. First thing we should test is if the 'neutral' of the Jaguar is truly 127. There's a 'calibrating a victor' thread around here somewhere and I won't have a chance to even ask our team to do it until Tuesday.

According to Luminary Micro's getting started doc for the Jaguars, the answer is no...

Originally Posted by Jaguar Getting Started

Q Do I need to calibrate my Jaguar (MDL-BDC)?
A Depends, but probably not. The Jaguar (MDL-BDC) module does have a calibration mode; however, the need to use
the calibration mode is unnecessary if you are using a cRIO system and a new Jaguar (MDL-BDC)—because the
default parameters of the Jaguar (MDL-BDC) are tuned for use with a cRIO. The calibration mode is provided if you
want to use a Jaguar (MDL-BDC) with another source of Servo (PWM) signal that does not have the same range of
pulse widths (for example, an older robot controller). If you have calibrated your Jaguar (MDL-BDC) from a different
source and move it back to a cRIO system, you will need to recalibrate.

[Joe Ross]

Originally Posted by JesseK

I wonder if the Jaguar has to be calibrated like the victor. First thing we should test is if the 'neutral' of the Jaguar is truly 127. There's a 'calibrating a victor' thread around here somewhere and I won't have a chance to even ask our team to do it until Tuesday.

You can see for yourself with the data posted on the official FIRST forum: http://forums.usfirst.org/showthread.php?t=10182 The victor is obviously off center, while the jaguar is not.

[EricVanWyk]

Originally Posted by DavidGitz

I wonder what the difference is on the digital output of the dig. sidecar between the victor pwm VI and the jaguar pwm VI. If someone could check this with an o-scope that would be pretty cool.

The Jaguar pulses are faster and longer, to get updates quicker with more resolution. You can also calibrate the Jaguar to the Victor pulse widths.

Originally Posted by JesseK

I wonder if the Jaguar has to be calibrated like the victor. First thing we should test is if the 'neutral' of the Jaguar is truly 127. There's a 'calibrating a victor' thread around here somewhere and I won't have a chance to even ask our team to do it until Tuesday.

Remember, we are in floating point math now:
1.0 is forward
0.0 is stop
-1.0 is reverse

[gorrilla]

Originally Posted by EricVanWyk

The Jaguar pulses are faster and longer, to get updates quicker with more resolution. You can also calibrate the Jaguar to the Victor pulse widths.



Remember, we are in floating point math now:
1.0 is forward
0.0 is stop
-1.0 is reverse

so, that means we wont have any delay?(it uses wifi to communicate with the OI right? so does this mean it will have a faster reponse then the victors?)

[RedHeadRobotics]

Looks pretty cool. I can't wait to get to try them out with the new control system

[waialua359]

The only downfall as stated earlier is its size compared to the victors. Now that you get an actual pic side by side, that has huge ramifications on the amount of additional space you need to run them.
At least they are CHEAPER for now...........

[Coach Norm]

The cheaper price will remain throughout the 2009 season according to Luminary Micro if you use the proper link. See post here for info: http://www.chiefdelphi.com/forums/sh...&postcount=102

[R.C.]

I was thinking about it, the size isn't toooo bad. Life is fun of obstacles, finding a path around them is all the fun.

[darkember]

How much more does the Jaguar wiegh then the victor?