*Warning* On talons!!!!

[tomy]

Teams should be careful with talons because they load is only 100V and a Cim Motor is 120V i know this post is not that professional and i apologize for that i just wanted to warn teams.

-Team 3038

edit this is the correct amps thanks to Al Skierkiewicz

Originally Posted by Al Skierkiewicz

tomy,
correct that to 100 amps and 131 amps respectively.

[Al Skierkiewicz]

tomy,
correct that to 100 amps and 131 amps respectively.

[ehochstein]

I take it your talon is no longer working? Could you post a photo of the insides? Or if you haven't opened it up at least the outside?

[Cory]

Originally Posted by tomy

Teams should be careful with talons because they load is only 100V and a Cim Motor is 120V i know this post is not that professional and i apologize for that i just wanted to warn teams.

-Team 3038

You should have had a breaker inline to protect the talon from extended over-current.

[tomy]

We didnt blow a talon our lead mentor looked into a talon before hooking it up and sorry again for the wrong amp i will change it

[Ether]

Originally Posted by Cory

You should have had a breaker inline to protect the talon from extended over-current.

I believe CTRE has tested the Talon and it is capable of handling just about anything the 40 amp breaker is capable of throwing at it, as long as the fan is attached. Mike C please correct me if I have misrepresented that.

[Jon Stratis]

Unfortunately, there aren't numbers available for the Victor 888 (the website says "Update Coming Soon", last time I checked). But some specs to compare:

Jaguar:
Continuous current: 40A
2 second current: 60A
peak at startup: 100A
Source: http://content.vexrobotics.com/docs/..._Datasheet.pdf

Talon:
Up to 100 amps peak 60 amps continuous current.
Source: http://www.crosstheroadelectronics.c...Manual_1_2.pdf

The Talon really isn't any different from the other speed controllers, and you'll only risk blowing one if you design something poorly (like a CIM motor that's constantly stalled). We've used Jaguars for years on our drive train, and never blown one, I don't expect to see anything different from the Talon.

Originally Posted by Cory

You should have had a breaker inline to protect the talon from extended over-current.

The breaker is present to protect the wiring, not the components attached to it.

[Tom Line]

We ran a talon with fan in a drive train stalled and pulled a continuous 78 amps by using multiple 40amp breaker inputs with no problem for extended periods of time during our beta testing.

An FRC robot should have a 40 amp snap action breaker that should not allow the Talon or Any Other motor controller to see 100 amps continuously for any amount of time.

Can you please detail your robot setup to show us how you pulled 100 amps long enough to damage the Talon?

[Jorge Ayala]

My team has been using Talons for a while, some months before the kickoff and so far any problems have been noticed. Actually, we did have some problems with Jaguars before using Talons.

[Ether]

Originally Posted by Jon Stratis

The Talon really isn't any different from the other speed controllers, and you'll only risk blowing one if you design something poorly (like a CIM motor that's constantly stalled).

See my previous post.

[tomy]

The point of this thread was to get the knowledge out there to be careful

[EricVanWyk]

Originally Posted by tomy

The point of this thread was to get the knowledge out there to be careful

Yes, but the "knowledge" is incorrect, misleading and poorly communicated.

Please do not spread Fear/Uncertainty/Doubt without evidence.

[Tom Line]

Originally Posted by tomy

The point of this thread was to get the knowledge out there to be careful

I am still very confused about what we should be careful of. Used correctly, none of the first motor controllers will ever see that amount of current long enough to damage them.

[mikeleslie]

So what I'm reading is that according to the spec, you should be careful using a Talon on an unprotected circut, so don't connect directly to the battery on one side with a CIM locked in a vice on the other.
Just testing my underastanding of the issue...
Of course if you wired things up similar to what's shown in the rulebook, you would have 2 breakers, both of which should go long before the Talon.

[Cory]

Originally Posted by Jon Stratis

The breaker is present to protect the wiring, not the components attached to it.

I understand that, but as a result, the Talon should never be able to see 133A.