New Talon vs New Victor

[phargo#1018]

I saw a post indicating PWM rates in this thread.
Is there an on-line source for documentation on the new talons?

The data I can find is from Vex
http://content.vexrobotics.com/vexpr...t-20140819.pdf

From looking at this data, what stands out to me is the peak and continuous current rating of the Talon compared to the Jaguar. This datasheet doesn't reflect any of the CAN features

[Qbot2640]

Originally Posted by Jon Stratis

... Additionally, you can control 8 solenoids (4 double solenoids) from each PCM, which would otherwise require 4 spike's - 1 PCM is smaller and lighter than 4 spikes.

Is this true? The information I read stated that the PCM replaced the spike for the compressor - but I did not think it would replace the individual solenoid spikes. If this is the case, then I am totally sold on the idea...saving all the spike space PLUS $30 a spike is major. Someone please confirm!

[Jon Stratis]

Originally Posted by Qbot2640

Is this true? The information I read stated that the PCM replaced the spike for the compressor - but I did not think it would replace the individual solenoid spikes. If this is the case, then I am totally sold on the idea...saving all the spike space PLUS $30 a spike is major. Someone please confirm!

We're a beta team, and an Alpha team before that... We've been controlling solenoids from the PCM for over a year now! The PCM is designed to control either 12 or 24V solenoids through a selectable jumper... it serves a similar purpose as the old pneumatics breakout board/module for the cRIO when it comes to solenoids.

[adciv]

Here's the full capabilities of the PCM
*It powers the Compressor
*You plug the 120 PSI Switch into it
*It controls 8 different solenoids. (Solenoids can be 12v or 24v, but must all be the same)
*You can have many PCMs on the robot

[Gregor]

Originally Posted by Qbot2640

Is this true? The information I read stated that the PCM replaced the spike for the compressor - but I did not think it would replace the individual solenoid spikes. If this is the case, then I am totally sold on the idea...saving all the spike space PLUS $30 a spike is major. Someone please confirm!

Most teams were already beyond using spikes to control their solenoids, they were doing it via to solenoid breakout on the cRio. Forcing teams to go back to spikes would have been a step backwards.

[FrankJ]

So can you use a PCM to control a talon or a victor? Or this the wrong thread for that?

[MrRoboSteve]

Originally Posted by adciv

Here's the full capabilities of the PCM
*It powers the Compressor...

Powers the compressor, or controls a Spike that powers the compressor?

[Knufire]

Originally Posted by MrRoboSteve

Powers the compressor, or controls a Spike that powers the compressor?

It powers the compressor directly AFAIK.

[Mark McLeod]

Originally Posted by MrRoboSteve

Powers the compressor, or controls a Spike that powers the compressor?

Originally Posted by Knufire

It powers the compressor directly AFAIK.

Yes, Spikes no longer power the compressor.
It wires directly into the PCM.

[Gregor]

Originally Posted by Knufire

It powers the compressor directly AFAIK.

Correct. There's a dedicated port from the PDP to the PCM, from which the compressor is wired.

[cgmv123]

Originally Posted by Knufire

It powers the compressor directly AFAIK.

Yep, the compressor +12v and ground wires plug straight into the PCM. There's some very intelligent circuitry in the PCM to make sure the large start current required by the compressor or any potential shorts in the system doesn't blow the fuse on the PDB's control system supplies. (The solenoid outputs have the same protection.)

[phargo#1018]

Can anyone forward detailed specifications on the new Talon?
The data I can locate, on-line, doesn't provide a lot of detail.
I am particularly interested in the loop closure rates.
On the surface, both the new Talon and the Jaguar have exactly the same PWM switching rates - in this case the motor PWM drive PWM (as compared to the PWM command rate from the Rio).

[RufflesRidge]

Originally Posted by phargo#1018

I am particularly interested in the loop closure rates.

1ms period according to what we've seen in Beta.

[Qbot2640]

Originally Posted by Gregor

Most teams were already beyond using spikes to control their solenoids, they were doing it via to solenoid breakout on the cRio. Forcing teams to go back to spikes would have been a step backwards.

I've never really looked at it that way - but I guess this makes a lot of sense now. We have never used the solenoid breakout because of our supply of 12V solenoids - the only 24V ones were the stuff we got in various KOPs or PDVs. We never really considered the solenoid breakout a progression away from Spike relays...but I guess if you had been doing it that way, the going back to Spikes would be a backward step. I am excited now.

[R.C.]

Originally Posted by Qbot2640

I've never really looked at it that way - but I guess this makes a lot of sense now. We have never used the solenoid breakout because of our supply of 12V solenoids - the only 24V ones were the stuff we got in various KOPs or PDVs. We never really considered the solenoid breakout a progression away from Spike relays...but I guess if you had been doing it that way, the going back to Spikes would be a backward step. I am excited now.

The cRio pneumatic breakout supported 12V solenoids. I believe the breakout supported both 12V and 24V depending how you wired it.