VEXpro 2016

[Thad House]

One thing I'm wondering now is why the 775 didn't get released last year? Its part number is right in the middle of last years numbering, and its drawing says October of 2014.

[sanddrag]

It'll be fun to swap a couple of these new 775s into our 2015 stacking robot, which currently uses two BaneBots 775s on the lift. Love the specs on this new motor. In theory, you could do a full robot without CIMs, though I wouldn't recommend it. I'm interested in seeing how this plastic tubing holds up too.

[Jim Zondag]

Very nice job on the DC motor tutorial, I have taught this subject many times. Understanding these principles is the key to properly designing any electrified mechatronic device. This tutorial is very well laid out, and does not use any concepts which are above high school levels of understanding. Nicely done!

[T^2]

Originally Posted by Thad House

One thing I'm wondering now is why the 775 didn't get released last year? Its part number is right in the middle of last years numbering, and its drawing says October of 2014.

Probably took a while to get approval from FIRST. 1323 was testing them on their bot during Madtown Throwdown 2014.

[AdamHeard]

Originally Posted by Jim Zondag

Very nice job on the DC motor tutorial, I have taught this subject many times. Understanding these principles is the key to properly designing any electrified mechatronic device. This tutorial is very well laid out, and does not use any concepts which are above high school levels of understanding. Nicely done!

Agreed. Very handy explanation.

Having the 50% power for 180 seconds test, as well as the stall at different voltages, will be super handy for sizing systems.

[carpedav000]

Woo! Drop down modules! Grasshopper drive for all!

[Dillon Carey]

Originally Posted by AdamHeard

Agreed. Very handy explanation.

Having the 50% power for 180 seconds test, as well as the stall at different voltages, will be super handy for sizing systems.

I believe you meant 50% speed . The test is at the theoretical "max" power

[svenw]

Looking awesome guys. The motor selection guide looks awesome and will be a huge help to all teams.

However, I noticed a small units issue for calculating the peak power that you may want to fix up.

Work = 196W should be Work =196J
and then Power = Work/time

[Jared]

The 775pro looks totally awesome. I am very happy that we no longer have to purchase from BaneBots.

I'm confused by the section in the motors guide that starts with "Note: Current Draw at Peak Power"

196 watts is not the power requirement for a motor to lift 20 kg 1.0 meters in the air. Power depends on the speed at which the box is lifted and motors should be selected based on the power required from them, not the amount of work being performed. The units are also a little questionable.

[Sohaib]

From what I see, there's nothing that says that the 775pro is going to be legal for the 2016 season; (I guess the same could be said about any other motor) albeit FIRST did decide to not allow the Banebots ones anymore due to the supply running out.

It just concerns me that on the page for this motor is does not say it is FRC legal, unlike the CIM motor.

[orangemoore]

Originally Posted by Sohaib

From what I see, there's nothing that says that the 775pro is going to be legal for the 2016 season; (I guess the same could be said about any other motor) albeit FIRST did decide to not allow the Banebots ones anymore due to the supply running out.

It just concerns me that on the page for this motor is does not say it is FRC legal, unlike the CIM motor.

Technically we won't know until the rules come out with the game. OR if FIRST decides that people should know before kickoff that it is or not FRC legal.

[PayneTrain]

As a team that likes to run a robot that can push around other robots, thanks for VersaDrop.

[josesantos]

TL;DR: 775Pro looks good. New motor page is awesome. What is happening during the peak power test?

Glad to see a viable (and then some)* replacement for the 18V BB RS-775. Is the 775pro made by CCL/CIM? If so, they make all the high power (149 W+) FRC motors between the CIM, Mini CIM, BAG, and AndyMark 9015...

In any case, I was super stoked to see the new motors website. Consistent data from a reliable source is always a good thing when considering which motor(s) to use, and as student/motor nerd I think it's great how transparent VEX is about testing.

Speaking of which, can someone please explain to me what exactly is happening during the peak power test? From my understanding the motor is running open loop with a regulated power supply and receives a controlled "half stall" torque. Over time the power output (which I assume is actually measured velocity times controlled torque) decreases. Is the motor just heating up over time and therefore unable to produce as much mechanical work? Is the reduced maximum power permanent? Some of the motors look like they burn out before 3 minutes, but I wouldn't assume one way or the other for the sealed can motors.

*Awaiting a season's worth of stress testing for final opinions, but it definitely looks good on paper.

[asid61]

Of all of the new products, the one I most can't wait for is the 775pro! I want to check out the plastic versaframe too, but I want to see some specs on it, particularly when compared to 0.040" or 0.0625" aluminum box tubing.

[timytamy]

Has anyone heard of the "Hero Gadgeteer"?

Page 18 of http://content.vexrobotics.com/vexpr...User-Guide.pdf shows the encoder being connected to this.

It looks like some sort of CAN enabled IO board or controller, designed to interface with TalonSRX style IO connectors.