Chief Delphi - Inverting Talon SRX

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Chief Delphi (http://www.chiefdelphi.com/forums/index.php)

- C/C++ (http://www.chiefdelphi.com/forums/forumdisplay.php?f=183)

- - Inverting Talon SRX (http://www.chiefdelphi.com/forums/showthread.php?t=135180)

King Nerd III

26-02-2015 15:01

Re: Inverting Talon SRX

Quote:

Originally Posted by wireties (Post 1450017)

So just reconnecting the PWM-PWM interfaces for the 2 sensors should fix things?

For one set, yes. I wish we had done both at the same time, one of the pairs is soldered directly to the board seeing as it is within 7 inches of the electronics.
We had a snow day today so no robotics, but on Saturday I should be able to rewire the entire thing.

GeeTwo

26-02-2015 15:13

Re: Inverting Talon SRX

Quote:

Originally Posted by wireties (Post 1450017)

So just reconnecting the PWM-PWM interfaces for the 2 sensors should fix things?

If one cable goes to the upper, and the other goes to the lower, yes, swapping those PWMs should electrically move the limit switches to the proper location.

Ether

26-02-2015 17:17

Re: Inverting Talon SRX

Quote:

Originally Posted by ozrien (Post 1449802)

You will need to fix it in the wiring. If the Talon is green (positive throttle) it will only check the forward limit switch. What causes the Talon to be green (closed-loop, slaving, slave-invert) instead of red (Reverse) can be controlled by Reverse Sensor and Reverse Closed-Loop output. But the limit switch is compared against the final output.

Quote:

Originally Posted by jhersh (Post 1450012)

Is it really that important that forward be up!? I get that it's a little more straightforward, but if you reverse the output and make the top "red" and the bottom "green" then you don't need to rewire, right? You were wanting a software workaround, so a slight inconvenience of needing to invert a number seems reasonable.

Hey Joe, Omar: Are you guys saying different things? Or am I missing something subtle (or obvious?) .

jhersh

27-02-2015 01:50

Re: Inverting Talon SRX

Quote:

Originally Posted by Ether (Post 1450333)

Hey Joe, Omar: Are you guys saying different things? Or am I missing something subtle (or obvious?) .

I can't speak for Omar, but I'll guess he meant what he said, assuming that the team wanted the polarity of the control values to remain unchanged. My assertion assumed that polarity is a rational trade off to rewiring.

FrankJ

27-02-2015 06:45

Re: Inverting Talon SRX

I think what Omar is saying (not to put words in his mouth :) ) is the limit switches work directly on the output of the controller which there is no reversing. IE the green & red leds relates to the polarity of the output.

Hopefully Omar will confirm or correct this.

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