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search: Posts Made By: Jeffrafa
Forum: Electrical 15-12-2016, 13:35
Replies: 3
Views: 355
Posted By Jeffrafa
Re: Need part at BunnyBot event.

We should have a spare that we could loan.

I'll check with our Electrical team and make sure.

Edit: Yep, we have spares, and will pack one along.

We plan to load in Saturday morning. If you still...
Forum: Pneumatics 06-12-2016, 16:03
Replies: 48
Views: 4,901
Posted By Jeffrafa
Re: 1.1 Pump (am-3227) Really an improvement?

Thanks Andy and Billfred for your quick work in testing these two compressors. It is great to have a representative comparison under the same controlled conditions.

Coming from a team that...
Forum: Pneumatics 02-12-2016, 20:03
Replies: 48
Views: 4,901
Posted By Jeffrafa
Re: 1.1 Pump (am-3227) Really an improvement?

Looking again I noticed the metric stats for the 1.1 Pump are copy-paste identical to the Viair 00090 specifications page.

I appreciate you following up via email to look into this. Hopefully all...
Forum: Pneumatics 02-12-2016, 19:09
Replies: 48
Views: 4,901
Posted By Jeffrafa
1.1 Pump (am-3227) Really an improvement?

I noticed AndyMark has come out with a new compressor as an alternate to the Viair 00090.

The primary claims about it seem to be that it has a higher 1.1 CFM output (legal limit per 2016 R79), and...
Forum: Extra Discussion 05-05-2016, 15:01
Replies: 17
Views: 3,226
Posted By Jeffrafa
Re: pic: Basketball Drive

I dug up a couple photos in my email of the ball drive Eric was talking about, we were both on the team in 2005 when it was developed in the offseason. As Eric mentioned, it shared a lot of...
Forum: Extra Discussion 18-04-2016, 17:58
Replies: 33
Views: 3,692
Posted By Jeffrafa
Re: pic: Stripped VexPro gear

We also learned this lesson the hard way on the WCP SS gearbox. Fortunately it first happened during our 6-hour unbag window prior to our first competition, so it didn't cost us any matches. It did...
Forum: Rules/Strategy 11-04-2016, 20:25
Replies: 23
Views: 3,254
Posted By Jeffrafa
Re: What defines a field fault?

Historically, AV issues are not typically considered field faults, as they are not part of the FMS/Field system. This includes sounds and score/clock display on the screens (the official clock is on...
Forum: General Forum 23-03-2016, 13:54
Replies: 12
Views: 1,086
Posted By Jeffrafa
Re: Is the FIRST District point system algorithm correct?

I had noticed some point irregularities for playoff points awarded to alliances when tiebreakers came into effect. This is one of those cases, where the winning alliance should have 10 points for...
Forum: General Forum 22-03-2016, 20:37
Replies: 121
Views: 18,660
Posted By Jeffrafa
Re: 20 point auto club

Team 2471 (https://www.youtube.com/watch?v=DFSSMTkEnlA). Unfortunately off-camera, but the announcer and the score (http://www.thebluealliance.com/match/2016orwil_qm61) confirm.

Team 4488...
Forum: General Forum 18-03-2016, 17:32
Replies: 13
Views: 3,250
Posted By Jeffrafa
Re: [FRC Blog] Numbers We Have and Numbers We Don't (But Will Next Week)

Huh, that's an interesting observation - I think you may be on to something. I had not noticed they advanced out of quarterfinals off of a tiebreaker in match 3.

I am still finding my way around the...
Forum: Regional Competitions 18-03-2016, 15:07
Replies: 16
Views: 1,956
Posted By Jeffrafa
Re: Power Rules at competition

Outlet convenience outside the pits will depend on the event and venue, but I would not count on it. You may be able to find a place to plugin temporarily outside the stands, but running an extension...
Forum: General Forum 18-03-2016, 14:09
Replies: 13
Views: 3,250
Posted By Jeffrafa
Re: [FRC Blog] Numbers We Have and Numbers We Don't (But Will Next Week)

Looks like FIRST's District Rankings for 2016 are now live. (http://frc-districtrankings.firstinspires.org/).

I haven't looked at other districts, but I noticed a discrepancy for PNW when comparing...
Forum: General Forum 15-03-2016, 18:44
Replies: 43
Views: 8,666
Posted By Jeffrafa
Re: Team Update 16 (2016)

If neither robot enters the volume of the midline, then G13 has not been broken, plain and simple. The revised description of the consequences for a violation does not effect the basic rule (breaking...
Forum: General Forum 13-03-2016, 04:09
Replies: 20
Views: 2,791
Posted By Jeffrafa
Re: Tower Flag drops when weekend

The flag assemblies were up and working at PNW Wilsonville, I was involved in getting them setup and tested on the field. The alliance flag will drop as soon as the tower is weakened in match. The...
Forum: General Forum 12-03-2016, 09:45
Replies: 18
Views: 2,969
Posted By Jeffrafa
Re: Low Bar Flaps Removed at Alamo Regional

I have noticed this happen a couple times as well. It makes for a bit of a foul hazard, as teams need to watch out for G41 if they are carrying a boulder already when heading for the low bar.
Forum: General Forum 08-03-2016, 02:42
Replies: 31
Views: 3,189
Posted By Jeffrafa
Re: Scoring/game issues

Beware of G11 here. If you run into an opponent in their courtyard on your way to the tower in the last 20 seconds then G28 will grant you scale points, but if you are clearly chasing down an...
Forum: General Forum 02-03-2016, 17:23
Replies: 93
Views: 11,707
Posted By Jeffrafa
Re: #25 Chain

I was looking forward to switching to dry lube similar to this this year, given its the first time in many years that we are running open gearboxes. After bad signs of premature wear on the practice...
Forum: General Forum 01-03-2016, 19:56
Replies: 93
Views: 11,707
Posted By Jeffrafa
Re: #25 Chain

It is tough to find good manufacturer data for 25 series chain. Have a look at the table at the bottom of page 1 here (http://www.did-coltd.com/english/products/pdf/s_102-103.pdf).

The max allowable...
Forum: Extra Discussion 24-02-2016, 19:04
Replies: 20
Views: 4,336
Posted By Jeffrafa
Re: pic: FRC 4329 Presents Trogdor

Very nice, looks sharp! What are your collector rollers made of? The clear plastic is pretty cool to see through, especially spotting the center bearing in the front roller. I also like how the...
Forum: Technical Discussion 19-02-2016, 14:23
Replies: 16
Views: 1,581
Posted By Jeffrafa
Re: Hex broaching in thick aluminum stock

We use a push broach like this one (http://www.mscdirect.com/product/details/00306324) to make hex holes for hubs and such. The material thickness rating on this one is 1/2" to 1-3/8". I know we have...
Forum: General Forum 22-01-2016, 13:52
Replies: 31
Views: 5,493
Posted By Jeffrafa
Re: Great source for 8" Pneumatic Tire to match AndyMark

I just tried to order these, as they still showed in stock. I used chat support to check on shipping time, but when he checked he said they were actually already out of stock, the website had not...
Forum: General Forum 31-03-2015, 14:24
Replies: 56
Views: 10,523
Posted By Jeffrafa
Re: Petition to end things that confuse the public

One cool crowd activity they did at the Wilsonville District in 2014 was a single-elimination rock-paper-scissors tournament. I think it was to fill a field timeout (so the MC could plan it ahead a...
Forum: General Forum 11-03-2015, 17:55
Replies: 32
Views: 11,175
Posted By Jeffrafa
Re: Predictions Week Three: Recycling Strategies

Its true that the Kiwi-streak is broken, but we didn't loose omni-drive, just went from 3 to 5. No traction wheels here, just solid H-Drive.

Looking forward to the competiton!
Forum: Rules/Strategy 20-02-2015, 16:23
Replies: 60
Views: 10,411
Posted By Jeffrafa
Re: 60 second set-up / pack-up time?

I think it is important to highlight a nuance to the flow control valve function that seems to be missing in this thread. Most pneumatic flow control valves (including this...
Forum: Technical Discussion 11-02-2015, 20:16
Replies: 9
Views: 1,500
Posted By Jeffrafa
Re: Drive motors drawing too much power

Unrelated, but something else to note is R67B & R76 - I don't see a pressure relief valve connected to the compressor.

For testing drivetrain, I would recommend similar to one of Dale's suggestions...
Showing results 1 to 25 of 168

 
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