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Search took 0.01 seconds. search: Posts Made By: sraque
Forum: Programming 17-12-2016, 08:32
Replies: 6
Views: 743
Posted By sraque
Re: Feed-forward coefficient for motion-constrained system

Thanks to all. Just the kind of input I was hoping for. Very useful. We'll be working this next week at practice.
Forum: Programming 16-12-2016, 10:50
Replies: 6
Views: 743
Posted By sraque
Feed-forward coefficient for motion-constrained system

I am interested in techniques used to calculate the F coefficient when you have a system you can't run at full speed or constant speed for very long (like you can a drive system). An arm or a lift...
Forum: Programming 07-08-2016, 11:32
Replies: 2
Views: 526
Posted By sraque
Re: LabVIEW Version Control

Similar to what Greg suggested in his post, the same can be done using SVN for version control. Both GIT and SVN will do the job for you. The decision will be dependent on which tool some of your...
Forum: Sensors 12-07-2016, 23:13
Replies: 5
Views: 723
Posted By sraque
Re: SRX Mag Encoder Mounting and Cables

We make our own with:
https://www.digikey.com/product-detail/en/3m/3756-10-100/ME10G-100-ND/3867658

and these:

https://www.digikey.com/product-detail/en/cnc-tech/3230-10-0103-00/1175-1646-ND/3883463
Forum: General Forum 04-07-2016, 10:58
Replies: 73
Views: 6,306
Posted By sraque
Re: Future FRC Technologies?

Stepper motors. The most common robot technology I can think of that we are not introducing to our students.
Forum: Electrical 01-07-2016, 22:14
Replies: 52
Views: 5,287
Posted By sraque
Re: Electrical connectors on control system items

I don't favor JST connectors. They are fine connectors, I don't hate them as others seem to, but they are difficult for a team to fabricate because the crimpers made for them are outrageously...
Forum: Programming 28-06-2016, 09:20
Replies: 5
Views: 633
Posted By sraque
Re: Programming Team Website

We have used Unfuddle.com for several years now. It provides our SVN repository for version control of code and documentation, a ticket system for task/work allocation, milestones to track tickets...
Forum: Programming 15-06-2016, 11:31
Replies: 39
Views: 4,578
Posted By sraque
Re: How many days do your programmers get with a fully built robot before stop build

We typically have 3-5 days before bag day where the robot is essentially complete. We have an open house the Sunday before bag day for sponsors, parents, and community so it needs to be working....
Forum: Programming 13-05-2016, 07:15
Replies: 21
Views: 2,148
Posted By sraque
Re: Selecting Autonomous with TI LaunchPad?

Is there a document somewhere that captures this, and similar, system design information?
Forum: Sensors 03-05-2016, 19:35
Replies: 17
Views: 1,423
Posted By sraque
Re: Analog Devices

And I know many teams will not use an item if they can get only one. I certainly won't go to competition without a spare.
Forum: Sensors 03-05-2016, 19:32
Replies: 4
Views: 1,209
Posted By sraque
Re: IR vs LiDAR for distance sensing?

We have done work with both of those sensors you linked to. HVA 3824 used the Lidar on their bot this year and had good experience with it. We used that long range IR sensor for part of the season,...
Forum: Sensors 06-04-2016, 16:48
Replies: 31
Views: 5,755
Posted By sraque
Re: Got Sensor Fusion?

I'm looking for any reports of how this device has worked in competition. Does it work as expected? Is it reliable? Any problems?
Forum: NI LabVIEW 06-04-2016, 07:07
Replies: 9
Views: 902
Posted By sraque
Re: Restart Robot Code at competition

We have this situation happening repeatedly. I also expect a race condition between code settings and camera boot.

We were restarting robot code before every match towards the end of SMT. We could...
Forum: NI LabVIEW 20-03-2016, 11:20
Replies: 2
Views: 643
Posted By sraque
Re: Gamma Too High On Camera

You can use the camera setting VIs. If you look in the vision VI, you will see a string of setting VIs. Set your exposure to zero. Beware that this sometimes behaves flaky, though. Our experience is...
Forum: NI LabVIEW 20-03-2016, 11:15
Replies: 45
Views: 6,895
Posted By sraque
Re: Toggle Between Two Cameras in Vision Processing

Which model Logitech cams seem to work with this? We have been having a couple flakey results with the Lifecams:

1. Exposure setting VI. Zero sets image pretty dark (but seems workable), 1-100...
Forum: NI LabVIEW 13-03-2016, 19:34
Replies: 4
Views: 583
Posted By sraque
Re: How to easily find customized "standard" VI's?

Well temporarily the problem was solved...we had to remove the second camera to save weight.:)

We may resort to moving the files. Our concern is that if there is another update, it will end up...
Forum: NI LabVIEW 07-03-2016, 19:20
Replies: 4
Views: 583
Posted By sraque
Re: How to easily find customized "standard" VI's?

Thanks, we've been looking through them, but so far we haven't found it(them) yet.

In an effort to focus on the important (and maybe learn something in the process) are there more or less likely...
Forum: NI LabVIEW 05-03-2016, 10:25
Replies: 4
Views: 583
Posted By sraque
How to easily find customized "standard" VI's?

In order to get 2 cameras working in labview this year, we had to modify several standard VIs. We tried to make sure that each time we edited a library or standard VI, we saved it with a new name in...
Forum: NI LabVIEW 24-02-2016, 08:15
Replies: 2
Views: 724
Posted By sraque
Re: Using PID with Talon SRX and Mag Encoder

Since you have read the manuals, I will try to tie it all together for you as best I can. Ignore motion profile. It would be an advanced approach.

In brief terms, setting the brake on the talons...
Forum: Control System 14-02-2016, 09:10
Replies: 2
Views: 473
Posted By sraque
Re: TalonSRX uses encoder when not in Voltage mode

Which voltage control mode are you in? Percent VBus or Voltage Compensation?

You may have some soft limits set on this talon. They are elephants and never forget. So if someone set limits a long...
Forum: NI LabVIEW 14-02-2016, 09:00
Replies: 10
Views: 1,902
Posted By sraque
Re: Implementing Feedforward/Feedback Motion Profile with Talon SRX

We have a VI in Periodic Tasks that logs data to a file. We logged throttle setting and speed as reported from the Talon SRX status VI. We drove the robot at full speed (joystick full forward) down a...
Forum: Control System 11-02-2016, 19:56
Replies: 6
Views: 630
Posted By sraque
Re: Talon SRX CAN Connectors

We use the same connectors but from digikey:

https://www.digikey.com/product-detail/en/0701070001/WM2533-ND/210968
Forum: NI LabVIEW 10-02-2016, 07:11
Replies: 15
Views: 885
Posted By sraque
Re: Connection Failed Deploying Labview

If ethernet, it must be to the radio, not to the Roborio directly.
Forum: NI LabVIEW 09-02-2016, 22:31
Replies: 25
Views: 1,853
Posted By sraque
Re: Lidar-Lite Help Please

Hmm..not sure what it could be. I think we wired the same as you are. We wired to the main I2C port on the RIO except for power which we wired to a 5V pin on DIO. We didn't add pull-up resistors or...
Forum: NI LabVIEW 09-02-2016, 21:50
Replies: 9
Views: 550
Posted By sraque
Re: recording data

In our Marvin T code release, we have logging VIs that you can use. We log all kinds of data in that code. Look in periodic tasks to find examples you can use. We log many files at once on that...
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