Jaguars and Talons

[FS Robotics]

Are Jaguars and Talons compatible? Nothing that I have found shows that there are any key differences that would create problems if we used both on the same bot, but I'm curious if anyone has insight on this. Thanks!

[geomapguy]

Originally Posted by FS Robotics

Are Jaguars and Talons compatible? Nothing that I have found shows that there are any key differences that would create problems if we used both on the same bot, but I'm curious if anyone has insight on this. Thanks!

Depends how you want to use them.

-Mixing in the drivetrain - NO

-Elsewhere - Sure, unless the two motors are sharing the same load

[Ether]

Originally Posted by geomapguy

Depends how you want to use them.

-Mixing in the drivetrain - NO

Why not?

-Elsewhere - Sure, unless the two motors are sharing the same load

Why not?

[geomapguy]

Originally Posted by Ether

Why not?



Why not?

Well Ether,

I would suspect because the motor curves are different??

What's the exact explanation or correction?

[yash101]

Originally Posted by geomapguy

Well Ether,

I would suspect because the motor curves are different??

What's the exact explanation or correction?

He means the controller curve. A Victor has a different curve from the Talon, which has a different curve from the Jaguar. Mix up the motor controllers and some motors are not spinning as fast as others, causing strafing in the drivetrain, or abrasion in a motor set, when a motor needs to fight the less power being received by a different motor. In real life, while these issues are quite minimal because a lot of work is done to make the curve more linear, It isn't what you want for precision operation!

The code is something that hasn't been discussed too much. Using the same motor controller for at least a specific component will ensure that the code stays cleaner and easier to understand. You don't want to look at programming jargon, where half a subsystem runs code for a Victor/Talon, and the other half runs the Jaguars. That just becomes very messy and can be hard to understand.

[Ether]

Originally Posted by geomapguy

I would suspect because the motor curves are different??

It's OK to combine motors with different motor curves.

For example, a CIM and a mini-CIM on the same gearbox.

[geomapguy]

Originally Posted by Ether

It's OK to combine motors with different motor curves.

For example, a CIM and a mini-CIM on the same gearbox.

My bad, as Yash 101 said, I meant controller curves

[Ether]

Originally Posted by geomapguy

My bad, as Yash 101 said, I meant controller curves

So why is that not OK,if it's OK to combine motors with different curves?

[geomapguy]

Originally Posted by Ether

So why is that not OK,if it's OK to combine motors with different curves?

Hmmm good point. I just always assumed it was just bad practice.

SO does it have much effect???

[Ether]

Originally Posted by geomapguy

Hmmm good point. I just always assumed it was just bad practice.

SO does it have much effect???

If you're trying to do closed-loop control there might be situations where it might be preferable to match the controllers.

Hey CD, any teams out there who used 1 Jag and 1 Talon for each 2-CIM gearbox on each side ?

[Rynocorn]

Slightly different but same principal I guess: This year we had 3 884 victors from vex and then 1 884 from Ifi and there was a significant difference in our drive train as it would turn ever slightly to the side. However, those were not jaguars or talons so not sure about that combination of those two. Also, all of the victors were tested beforehand and worked well. Just figured this would help a bit even if it wasn't what you were looking for exactly

[geomapguy]

Originally Posted by Rynocorn

3 884 victors from vex and then 1 884 from Ifi

Well........IFI owns VEXPro so essentially it was just an older 884 and a newer one. There was a year there where they rebranded their stuff. So accordingly, we have IFI spikes and VexPro Spikes

[Ether]

Originally Posted by Rynocorn

This year we had 3 884 victors from vex and then 1 884 from Ifi and there was a significant difference in our drive train as it would turn ever slightly to the side.

Unless you swapped the two left-side Vics with the two right-side ones and observed that the problem switched sides, you can't conclude that the turning was caused by a difference in the Vics.

[yash101]

Originally Posted by geomapguy

Hmmm good point. I just always assumed it was just bad practice.

SO does it have much effect???

The effect would be neglegible. However, the different handling of motor controllers means that one motor would go through much more abrasion than the other.

While there are safety diodes, one motor may generate enough backflow because of reverse electro-motiv force, to destroy MOSFETs on these motor controllers. However, this is typically negligible!

It's funny how basic physics can explain so much . #ILovePhysics

[kevin.li.rit]

Originally Posted by yash101

The effect would be neglegible. However, the different handling of motor controllers means that one motor would go through much more abrasion than the other.

While there are safety diodes, one motor may generate enough backflow because of reverse electro-motiv force, to destroy MOSFETs on these motor controllers. However, this is typically negligible!

It's funny how basic physics can explain so much . #ILovePhysics

How would one motor go through much more abrasion?