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-   -   Having trouble with Talons (http://www.chiefdelphi.com/forums/showthread.php?t=126422)

Diplodicus 13-02-2014 23:01
Having trouble with Talons
 
We are running a 6 CIM drive base each controlled with Talons. For some reasons two of the talons are outputting slightly less voltage. I have checked the input voltage on the talons from the power distribution board and the voltage on the PWM cable and they match the voltage going to the other talons. We have replaced the talons themselves twice and it is still a problem with the location. Does anyone have any idea what the source of the problem is?

Chris_Ely 13-02-2014 23:09
Re: Having trouble with Talons
 
Have you calibrated the Talons?

Diplodicus 13-02-2014 23:17
Re: Having trouble with Talons
 
I don't know what your talking about but the problem isn't with the talons themselves because we have replaced the with Talons we have confirmed to work in other locations.

geomapguy 13-02-2014 23:19
Re: Having trouble with Talons
 
Quote:
Originally Posted by Diplodicus (Post 1342839)
I don't know what your talking about but the problem isn't with the talons themselves because we have replaced the with Talons we have confirmed to work in other locations.
Actually the problem itself might be the Talons...Have you calibrated them??

Diplodicus 13-02-2014 23:21
Re: Having trouble with Talons
 
What do you mean by calibrating? I have never heard of calibrating Talons.

MrRoboSteve 13-02-2014 23:24
Re: Having trouble with Talons
 
Secrets like this are often kept in the manual.

http://www.crosstheroadelectronics.c...Manual_1_1.pdf

geomapguy 13-02-2014 23:25
Re: Having trouble with Talons
 
Quote:
Originally Posted by Diplodicus (Post 1342842)
What do you mean by calibrating? I have never heard of calibrating Talons.
http://www.crosstheroadelectronics.c...Manual_1_1.pdf

z_beeblebrox 13-02-2014 23:25
Re: Having trouble with Talons
 
Voltage drops with longer wires. The effect isn't huge (on the order of 10ths of a volt, based on this calculator) on an FRC robot scale, but it may explain your problem. Are the problematic Talons farther from the PD board than the others?

Chris_Ely 13-02-2014 23:25
Re: Having trouble with Talons
 
Quote:
Originally Posted by Diplodicus (Post 1342842)
What do you mean by calibrating? I have never heard of calibrating Talons.
See page 7 of this manual.
Calibrating sets the Talon output to follow the PWM signal. So full is full, and neutral is neutral.

Diplodicus 13-02-2014 23:28
Re: Having trouble with Talons
 
The only thing that is different is that the voltage drop over the two Talons is .24 volts and the voltage drop over all the other talons is 0 volts. The resistance across the positive leads is also higher than the other talons which have a resistance of close to 0.

Diplodicus 13-02-2014 23:29
Re: Having trouble with Talons
 
Quote:
Originally Posted by luckof13 (Post 1342846)
See page 7 of this manual.
Calibrating sets the Talon output to follow the PWM signal. So full is full, and neutral is neutral.
Broken link

geomapguy 13-02-2014 23:31
Re: Having trouble with Talons
 
Quote:
Originally Posted by Diplodicus (Post 1342849)
Broken link
http://www.crosstheroadelectronics.c...Manual_1_1.pdf

Ether 13-02-2014 23:34
Re: Having trouble with Talons
 
Quote:
Originally Posted by Diplodicus (Post 1342848)
The only thing that is different is that the voltage drop over the two Talons is .24 volts and the voltage drop over all the other talons is 0 volts. The resistance across the positive leads is also higher than the other talons which have a resistance of close to 0.
What do you mean by voltage drop "over" the Talons? And resistance "across the positive leads" ? Could you post a quick sketch?

Chris_Ely 13-02-2014 23:35
Re: Having trouble with Talons
 
Quote:
Originally Posted by Diplodicus (Post 1342849)
Broken link
Works for me.
Try one of the many other links in this thread.

mrnoble 13-02-2014 23:35
Re: Having trouble with Talons
 
Diplodocus says to tell you thank you, and that the calibration worked.


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