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-   -   VEXpro 2016 (http://www.chiefdelphi.com/forums/showthread.php?t=140178)

Karthik 10-12-2015 15:53
Re: VEXpro 2016
 
Quote:
Originally Posted by Thad House (Post 1511159)
Do you guys ever think you would be able to test the old 775, that way teams could easily compare it to the new 775pro?
Here, I did it really quickly for you. ;)

http://motors.vex.com/bb-775

Thad House 10-12-2015 15:54
Re: VEXpro 2016
 
Lol response overload :D I guess I'm just blind.

Quote:
Originally Posted by Jared Russell (Post 1511158)
Commence the year of the brown out!
Totally. Teams are going to need to be really careful.

mman1506 10-12-2015 15:58
Re: VEXpro 2016
 
Could you make a totally non scientific video bashing the new plastic extrusion with a hammer? I'm a huge fan of plastics but convincing others will be difficult.

s_forbes 10-12-2015 15:58
Re: VEXpro 2016
 
Neat stuff!

How are the tolerances on the polycarb tubing? We use extruded polycarb round tubes for underwater robots, and the dimensions are pretty consistently off of nominal.

Quote:
Originally Posted by Aren_Hill (Post 1511151)
Currently 8 motors were tested for that Data, will develop further over time.

-Aren
Powerful little motors! For the locked rotor stall test, it looks like they'll cook if stalled in under 10ms? EDIT: oh, I can't read units on graphs. Looks like it cooked at about 3 seconds from the raw data you have

Basel A 10-12-2015 16:00
Re: VEXpro 2016
 
Quote:
Originally Posted by Jared Russell (Post 1511158)
Commence the year of the brown out!
2015 control system + 2015 motor rules in any other game would've been the year of the brownout anyway. Depending on 2016 motor rules (Still unlimited non-CIM? 6 total CIM+Vex775?), you're right that it could be remarkably bad.

Jared Russell 10-12-2015 16:01
Re: VEXpro 2016
 
Any chance we could get measured RS-550 data too? It would be useful for translating prototypes or old robot mechanisms into equivalent current-season-legal designs...and also to satisfy my hunch that the RS-550 radically underperforms its specs :)

mman1506 10-12-2015 16:05
Re: VEXpro 2016
 
Are the gears in the VP integrated encoder 1:1?
Any updates on the plastic versablocks to fix the stripping issue?

nuclearnerd 10-12-2015 16:09
Re: VEXpro 2016
 
One stat I'd like to see on the motor page: how long can each motor run at stall before it burns out.

At 135W, and no mass to sink it, I bet the 775Pro burns in a second. (Unless you could rig a secondary cooling blower. Hmmmm)

AdamHeard 10-12-2015 16:10
Re: VEXpro 2016
 
Quote:
Originally Posted by nuclearnerd (Post 1511172)
One stat I'd like to see on the motor page: how long can each motor run at stall before it burns out.

At 135W, and no mass to sink it, I bet the 775Pro burns in a second. (Unless you could rig a secondary cooling blower. Hmmmm)
The locked rotor stall test conveys this. Looks like it lasts 3.911 seconds.

Battery sag + all the resistance in line changes that some on an FRC robot though. These look like they'll be fairly robust.

cad321 10-12-2015 16:12
Re: VEXpro 2016
 
Quote:
Originally Posted by nuclearnerd (Post 1511172)
At 135W, and no mass to sink it, I bet the 775Pro burns in a second. (Unless you could rig a secondary cooling blower. Hmmmm)
Just strap a fan onto another 775 directly behind it. :D :p

Also, when can we expect the new 775's to be in stock?

nuclearnerd 10-12-2015 16:16
Re: VEXpro 2016
 
Quote:
Originally Posted by AdamHeard (Post 1511173)
The locked rotor stall test conveys this. Looks like it lasts 3.911 seconds.

Battery sag + all the resistance in line changes that some on an FRC robot though. These look like they'll be fairly robust.
Oh thanks. I missed that (didn't realize there was more information when you click on each motor). 4 seconds isn't a lot of time though. Maybe it's time to design a Versaplanetary clutch stage? :)

R.C. 10-12-2015 16:18
Re: VEXpro 2016
 
Quote:
Originally Posted by cad321 (Post 1511174)
Just strap a fan onto another 775 directly behind it. :D :p

Also, when can we expect the new 775's to be in stock?
WCP will have equivalent pages up and we should have a decent amount of stock shipping within a week or so.

JVN 10-12-2015 16:19
Re: VEXpro 2016
 
Quote:
Originally Posted by nuclearnerd (Post 1511176)
Oh thanks. I missed that (didn't realize there was more information when you click on each motor). 4 seconds isn't a lot of time though. Maybe it's time to design a Versaplanetary clutch stage? :)
If you like stalling motors at 12V for that much time... perhaps I can interest you in one of our sealed-can motors? :)

nuclearnerd 10-12-2015 16:24
Re: VEXpro 2016
 
Quote:
Originally Posted by JVN (Post 1511178)
If you like stalling motors at 12V for that much time... perhaps I can interest you in one of our sealed-can motors? :)
Probably a wise suggestion :) I'm trying to remember how many intake motors my old team went through in 2014. It was nice to have a lightweight powerful motor to rush the ball into the bot, but when the ball came in a little crooked... poof.

Anupam Goli 10-12-2015 16:29
Re: VEXpro 2016
 
Looking forward to those integrated encoders on the VP. This is a great addition for teams that are looking to do more advanced controls without having to use third party sensors and create custom mounts.

Also obviously excited for the 775pro, can't wait to get our hands on some.


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