Forum: Programming
27-09-2016, 14:17
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Replies: 57
Views: 5,847
Re: Tuning PID Constants Over a Range
Eli,
While your statement is true, we have found that simply putting a motion profile on your input will eliminate the need for cascading control.
To me, the motion profile (whichever you choose .....
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Forum: Extra Discussion
21-08-2016, 16:01
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Replies: 32
Views: 5,186
Re: paper: Einstein History
I don't know if it's Andrew's summary or the data, but 217 should have 7 appearances: 2001, 2005, 2006, 2008, 2009, 2011, 2016.
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Forum: General Forum
03-06-2016, 21:20
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Replies: 44
Views: 5,952
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Forum: General Forum
03-06-2016, 21:17
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Replies: 44
Views: 5,952
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Forum: Championship Event
01-05-2016, 05:14
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Replies: 110
Views: 26,155
Re: 2016 Einstein
I think your data may be off regarding 2 appearance streaks.
217 had a 2 appearance streak in 2005-2006 and in 2008-2009.
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Forum: Extra Discussion
14-03-2016, 19:46
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Replies: 18
Views: 3,160
Re: pic: Rock City Power Outage
I have to say that even with the 4 hour delay this was one of the smoothest events I have been to in a very long time.
Having Blair at the event was a bonus even though he didn't mc many matches...
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Forum: Technical Discussion
02-03-2016, 10:40
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Replies: 109
Views: 8,886
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Forum: Technical Discussion
01-03-2016, 13:41
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Replies: 109
Views: 8,886
Re: Pneumatic Regulators from Automation Direct
The relief feature is based on the set pressure so it completely meets the definition of the rule. If you take a large pneumatic cylinder downstream that is extended and then manually push it back,...
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Forum: Technical Discussion
01-03-2016, 11:38
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Replies: 109
Views: 8,886
Re: Pneumatic Regulators from Automation Direct
Once again the GDC under Frank Merrick's leadership is the most professional and most reasonable during all my years of participating in FRC.
The practical and team centric approach that FRC has...
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Forum: Technical Discussion
26-02-2016, 16:08
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Replies: 109
Views: 8,886
Re: Pneumatic Regulators from Automation Direct
Al,
You asked a direct question about the Norgren valve and I will answer it.
we have had terrible hysteresis problems with that valve and it is mostly related to it being used at the extreme of...
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Forum: Technical Discussion
26-02-2016, 12:35
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Replies: 109
Views: 8,886
Re: Pneumatic Regulators from Automation Direct
I, too have expansive experience with fluid regulators, both air and paint solvent and 100% agree with Martin on this.
We are using the Automation Direct regulator and it performs MUCH better than...
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Forum: Technical Discussion
14-02-2016, 15:59
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Replies: 10
Views: 1,526
Re: Bumper Length Rules (Another One)...
Soohan,
Others have been pretty clear but let me confirm your robot is illegal unless you put 8" of bumper in each corner. There is no gray area.
If the string you wrap around your robot is longer...
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Forum: Technical Discussion
12-02-2016, 16:50
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Replies: 27
Views: 3,943
Re: VexPro Bearings
The Emory cloth is absolutely the way to go. Basically, we take off the anodizing on the round part of the thunderhex and it is a nice slip fit.
However, right now since the thunderhex is slightly...
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Forum: Technical Discussion
11-02-2016, 18:59
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Replies: 27
Views: 3,943
Re: VexPro Bearings
Kevin B.,
We actually have never been asked to put up the specifications on our web site. My team is working on getting the specifications for all of the bearings since most of them are standard...
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Forum: Rules/Strategy
02-02-2016, 18:11
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Replies: 51
Views: 8,075
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Forum: Electrical
21-01-2016, 07:51
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Replies: 5
Views: 843
Re: Victor SP Issue, Defective?
Please check to make sure that all of the motors are spinning in the same direction. At low speed you may not see it as the other motors may be able to overcome the one going in the opposite...
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Forum: Motors
20-01-2016, 11:11
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Replies: 20
Views: 3,314
Re: Heat/Friction of 775 + Versaplanetary
One common thing I have seen people do is get the input housing and output housing rotated 90 degrees from where they should.
The bolt patterns for the motor mounting and the VP assembly holes are...
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Forum: Motors
20-01-2016, 07:37
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Replies: 20
Views: 3,314
Re: Heat/Friction of 775 + Versaplanetary
I just want to clarify a few things so we can all be on a similar page.
The VP gearboxes are pretty thin walled in the ring gear stages and they are made from aluminum alloy machined from an...
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Forum: Electrical
19-01-2016, 18:40
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Replies: 28
Views: 3,386
Re: Spark Motor Controller vs. Victor SP
Greg,
Why is this a silly debate? You have information on your web site that does not include key information. I can only guess that it is an oversight on your part. You know as well as I do that...
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Forum: Motors
19-01-2016, 18:35
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Replies: 20
Views: 3,314
Re: Heat/Friction of 775 + Versaplanetary
How are you calculating power?
Is the 150W you are referring to the electrical power or mechanical power?
I can tell you the 340ish power that is on the VEXpro web site is at max power and is...
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Forum: Electrical
19-01-2016, 08:18
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Replies: 28
Views: 3,386
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Forum: Electrical
10-01-2016, 18:16
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Replies: 26
Views: 3,198
Re: Electrical parts keep breaking!
The red wire is intentionally not connected because it is absolutely not required for operation. However, to stay compatible with the PWM standard spacing and connection order, the red wire was left...
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Forum: General Forum
06-01-2016, 10:55
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Replies: 83
Views: 16,408
Re: What makes FRC a sport?
Some of you have asked, "why does it matter?".
While it doesn't matter to me as I participate in both traditional sports (swimming & golf) and robotics (FRC and VEX IQ as a coach), it does matter to...
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Forum: Technical Discussion
05-01-2016, 16:24
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Replies: 35
Views: 4,668
Re: Sonic Shifter - recent feedback?
I would use the upgrade. The upgraded shafts are much better and allow for the use of the ThunderHex bearing without any additional machining.
By my math, the deflection difference is not enough to...
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Forum: Technical Discussion
05-01-2016, 08:21
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Replies: 35
Views: 4,668
Re: Sonic Shifter - recent feedback?
BoilerMentor,
Were you guys using the old ball shifter shaft without the pin in it or the new shaft?
I ask because the press fit in the original shaft would allow the deflection you speak of but...
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Temp wiring is always bad but it is made worse when dealing with a $1000 part. You wouldn't try to lash a makeshift power source to your PC. - Al Skierkiewicz [more] 
