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Joshua Wilkinson

http://www.teamhassenplug.org/NXT/Gears/ - 16 views

www.teamhassenplug.org/Gears

shared by Joshua Wilkinson on 06 Dec 11 - No Cached
  • This motor shaft will make 3 rotations, in the same time the output shaft makes 5 Gears used: 20 tooth on motor, 12 tooth on output Gear Ratio: 3:5 Power: 3/5x motor Speed: 5/3x motor (faster)
  • This motor shaft will make 1 rotations, in the same time the output shaft makes 3 Gears used: 24 tooth on motor, 8 tooth on output Gear Ratio: 1:3 Power: 1/3x motor Speed: 3x motor (faster)
  • Anthony DiVirgilio on 06 Dec 11
     
    great ideas for gear ratios
  • ...4 more comments...
  • Jarid Brogan on 06 Dec 11
     
    very helpful gear ratio chart
  • Joshua Wilkinson on 06 Dec 11
     
    the bottom two charts are good. It does make it go considerably faster
  • Thomas Helm on 07 Dec 11
     
    It looks like a smart idea for designing the wheels maybe it would be possible to adjust it and make it stronger
  • Joshua Wilkinson on 07 Dec 11
     
    This is probably the best for speed and power(torque). The robot would be front wheel drive based on that if the nxt is on the back with the wheels the robot would flip or slide down due to the weight on the downhill side of the robot not the uphill side(assuming the track is at 22.5 degress
  • Thaddeus McKeon on 07 Dec 11
     
    I agree wit Josh this is what we need for the project
  • Alexander Laferriere on 07 Dec 11
     
    this has some good ideas
Nick Laferriere

LEGO Gear Ratio Calculator - 13 views

sariel.pl/ratios

shared by Nick Laferriere on 06 Dec 11 - Cached
    • Thomas Corcoran
      Thomas Corcoran on 06 Dec 11
       
      thats the best ratio i could find for the tools we have
  • Alexander Laferriere on 06 Dec 11
     
    this is good to show what gears to use
  • ...1 more comment...
  • Thomas Helm on 06 Dec 11
     
    This is like a calculator you insert the gear it gives you the ratio
  • Declan Coen on 06 Dec 11
     
    this is very useful in helping us decide which gears to use and what ratio to set them at
  • Joshua Wilkinson on 06 Dec 11
     
    This might be the key thing for gear ratios
Anthony DiVirgilio

Rear wheel drive vs. front wheel drive. Which is better? - 8 views

www.all-about-car-selection.com/rear-wheel-drive.html

wheel configuratoin

shared by Anthony DiVirgilio on 06 Dec 11 - No Cached
  • fwd holds an advantage in slippery conditions such as ice or snow as more weight is over the drive wheels reducing slip during acceleration
    • Anthony DiVirgilio
      Anthony DiVirgilio on 06 Dec 11
       
      rear wheel drive only has advantages where steering is envloved
    • Bryan Kelleher
      Bryan Kelleher on 07 Dec 11
       
      AGREED, BUT ARE WE GOING FOR PURE STEERING? OR POWER?!
  • Anthony DiVirgilio on 06 Dec 11
     
    this could be useful
  • ...3 more comments...
  • Thomas Helm on 07 Dec 11
     
    its really opinion but it does seem like a good idea to put it in the front
  • Thomas Corcoran on 07 Dec 11
     
    This could be very helpful for gear changing
  • Alexander Laferriere on 07 Dec 11
     
    these are real cars not NXTs
  • Joshua Wilkinson on 07 Dec 11
     
    thanks for pointing that out, i didnt want to say anything
  • Thaddeus McKeon on 07 Dec 11
     
    it doesn't matter the theory is sound
Alexander Laferriere

chowmillersumobots - 8 views

chowmillersumobots.wordpress.com

sensor NI sound iRobot sensors detection robot Ultrasonic wall obstacle

shared by Alexander Laferriere on 15 May 12 - No Cached
  • Declan Coen on 15 May 12
     
    the robot designs on this page are possible for our criteria. the majority of them have a ramp like structure on the front for pushing and flipping
  • ...3 more comments...
  • Joshua Wilkinson on 15 May 12
     
    the ramp on the front seems to be the easiest way to win based on other designs ive seen.
  • Alexander Laferriere on 17 May 12
     
    this has some good ideas
  • Thaddeus McKeon on 17 May 12
     
    the terminator looks like a fun approach to this project
  • Thomas Helm on 17 May 12
     
    i wish i could see some of the videos but i cant right now i wanted to see if thee were any changes to ramp in general
  • Jarid Brogan on 17 May 12
     
    the sumobotofdestruction looks cool and doable
Bryan Kelleher

bumper tech - 8 views

www.nxtprograms.com/...index.html

shared by Bryan Kelleher on 17 Oct 11 - No Cached
  • Bryan Kelleher on 17 Oct 11
     
    ^ this show an idea we can use for backing up when objects contact our nxt
  • ...2 more comments...
  • Declan Coen on 17 Oct 11
     
    this would help our robot detect things from different angle. also, it is more efficient than using a touch sensor with no attachments.
  • Joshua Wilkinson on 17 Oct 11
     
    this works if its driving with the castor wheel in back not the front, it looks like a good idea though
  • Thomas Helm on 17 Oct 11
     
    its actually a pretty nice setup if we found space for the other sensors, but id stick with the back wheel we have now, it also shows how to make it very nicely
  • Bryan Kelleher on 07 Dec 11
     
    HEY
Thomas Helm

Something to use - 6 views

www.youtube.com/watch

shared by Thomas Helm on 03 Apr 12 - No Cached
  • Thomas Helm on 03 Apr 12
     
    This is im pretty sure everything we have
  • ...2 more comments...
  • Alexander Laferriere on 05 Apr 12
     
    i think that this is a great idea
  • Declan Coen on 05 Apr 12
     
    this would probably work very well and if we added a touch sensor *i dont know if they had one* which would activate the ultrasonic sensor and it would search and pick a path
  • Thomas Helm on 05 Apr 12
     
    That was a good idea declan thanks buddy
  • Declan Coen on 05 Apr 12
     
    OK 0_0
Thomas Helm

Logging Front Panel Data - NI LabVIEW 8.6 Help - 6 views

zone.ni.com/...logging_front_panel_data

shared by Thomas Helm on 25 Jan 12 - No Cached
  • A waveform chart logs only one data point at a time with front panel datalogging
  • wire an array
  • chart indicator, the datalog file contains a
  • ...1 more annotation...
  • subset of the array the chart displays.
  • Declan Coen on 25 Jan 12
     
    Shows how datalogging works
  • Thomas Helm on 26 Jan 12
     
    Use front panel datalogging to record data for use in other VIs and in reports. For example, you can log data from a graph and use that data in another graph in a separate VI. Each time a VI runs, front panel datalogging saves the front panel data to a separate datalog file, which is in the format of delimited text.
Alexander Laferriere

LEGO - 9 views

us.mindstorms.lego.com/...DisplayProject.aspx

NI sound wall iRobot obstacle sensor sensors detection Ultrasonic robot mindstorms community lego com

shared by Alexander Laferriere on 06 Dec 11 - No Cached
  • Thomas Helm on 06 Dec 11
     
    sorta of a change in design than the last one i had thought was good
  • ...3 more comments...
  • Alexander Laferriere on 06 Dec 11
     
    this looks like it wikll work
  • Thomas Corcoran on 06 Dec 11
     
    this is a good idea but it would be hard to change the gears in a short amount of time
  • Declan Coen on 06 Dec 11
     
    this might be a possible solution but it might not have enough power to make it up the 22.5 degree incline.
  • Alexander Laferriere on 07 Dec 11
     
    looks good
  • Andrew Drogan on 07 Dec 11
     
    Great pictures Tommy. We can use some of these ideas to build our robot
Joshua Wilkinson

Reading from Datalog Files - NI LabVIEW 8.6 Help - 5 views

zone.ni.com/...reading_datalog_files

datalog reading

shared by Joshua Wilkinson on 26 Jan 12 - No Cached
  • Bryan Kelleher on 26 Jan 12
     
    this shows how the data logs work ( ._.)
  • Alexander Laferriere on 26 Jan 12
     
    Nice (o____________________________________________________________________o)
  • Nick Laferriere on 26 Jan 12
     
    oooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooo
Thomas Helm

LabVIEW Add-ons for LEGO® MINDSTORMS® NXT - Developer Zone - National Instrum... - 5 views

zone.ni.com/...4435

shared by Thomas Helm on 13 Oct 11 - Cached
    • Alexander Laferriere
      Alexander Laferriere on 13 Oct 11
       
      this shows how to turn on a motor if the button is pressed so if it is not pressed it will stop
  • Thomas Helm on 05 Apr 12
     
    LabVIEW Toolkit for LEGO MINDSTORMS NXT Program and control NXT devices with the full power of LabVIEW Get real-time updates from the NXT device during program operation with LabVIEW front panels Create native blocks for LEGO MINDSTORMS NXT software Figure 1.
Lindsey Carlson

datalogging and suchh. - 5 views

www.teamhassenplug.org/...Beginning_Datalogging.htm

shared by Lindsey Carlson on 26 Jan 12 - No Cached
  • The basic idea of datalogging is to run an experiment, but have a computer do the tedious data recording for you. For instance, if you wanted to know how the temperature changes during the course of an entire day, you
  • Anthony DiVirgilio on 26 Jan 12
     
    datalogging
  • Joshua Wilkinson on 26 Jan 12
     
    good info, but seems a little complicated
  • Alexander Laferriere on 26 Jan 12
     
    i dont think thats our program
Declan Coen

Log Red Dataset - LabVIEW 2009 LEGO MINDSTORMS NXT Module Help - National Instruments - 4 views

zone.ni.com/...logreddata_poly

shared by Declan Coen on 26 Jan 12 - No Cached
  • Declan Coen on 26 Jan 12
     
    LabVIEW 2009 LEGO MINDSTORMS NXT Module Help Logs Data from the specified sensor connected to the specified port. The data logging parameters are sample time and total time.For the Red Vis, the data is stored in the RedData.dat file on the NXT brick and can be viewed using the Data Viewer application.
Thomas Helm

Light sensor and Ultrasonic thats it - 4 views

www.youtube.com/watch

shared by Thomas Helm on 03 Apr 12 - No Cached
  • Declan Coen on 05 Apr 12
     
    this could work but what if the robot turned and started going the wrong direction back towards the start???? it only follows the walls which could lead the robot back to the start not the finish
  • Thomas Helm on 05 Apr 12
     
    anyrobot we do is basically going to be folllowing the wall though and it would have to go all the way to the end to start going back to the beginning
Thomas Corcoran

datalogging - 4 views

www.weston.org/...datalogging.htm

shared by Thomas Corcoran on 26 Jan 12 - No Cached
  • Thomas Corcoran on 26 Jan 12
     
    how to data log
  • Thomas Corcoran on 26 Jan 12
     
    check this bad lary out
Declan Coen

Data acquisition with NXT and LabVIEW - Robota - 4 views

robota.das.ufsc.br/...quisition_with_NXT_and_LabVIEW

data

shared by Declan Coen on 26 Jan 12 - No Cached
  • Declan Coen on 26 Jan 12
     
    it explains how the block diagram needs to be set up to collect data and then input it to the computer
Anthony DiVirgilio

NXT Line Follower - 8 views

www.nxtprograms.com/...steps.html

sensors detection

shared by Anthony DiVirgilio on 17 Oct 11 - Cached
  • Thaddeus McKeon on 17 Oct 11
     
    shows how to build a robot that follows lines.
  • Thomas Corcoran on 08 Mar 12
     
    line follower
  • Thomas Helm on 08 Mar 12
     
    All we would have to do is change those razor things out
Bryan Kelleher

LEGO.com MINDSTORMS : Community : NXTLOG - 4 views

us.mindstorms.lego.com/...DisplayProject.aspx

sensor

shared by Bryan Kelleher on 02 Apr 12 - No Cached
  • Bryan Kelleher on 02 Apr 12
     
    the way the ultra sonic sensor is set up is a good idea
  • Thaddeus McKeon on 02 Apr 12
     
    I feel the way they set up the light sensor is a little to far out
  • Joshua Wilkinson on 02 Apr 12
     
    we are gonna have to place the ultrasound or light sensor under three inches if we are following the inside walls, but thats an individule decsion. we could use a code similar to the wall following code in the romba project.
Anthony DiVirgilio

LEGO.com MINDSTORMS : Community : NXTLOG - 8 views

us.mindstorms.lego.com/...DisplayProject.aspx

shared by Anthony DiVirgilio on 06 Dec 11 - No Cached
  • This is a simple dual worm gear drive. It turns two turntables using two worm gears spinning in the same direction at the same speed using one motor. It was really quite easy to build.
    • Anthony DiVirgilio
      Anthony DiVirgilio on 07 Dec 11
       
      this could be really helpful
  • Thomas Corcoran on 06 Dec 11
     
    how to use a worm gear
  • Alexander Laferriere on 06 Dec 11
     
    this will be helpfull
Anthony DiVirgilio

NXT Data Collection - NI Discussion Forums - 3 views

forums.ni.com/...1441446

data nxt collection

shared by Anthony DiVirgilio on 26 Jan 12 - No Cached
  • sounds like for your application you might want to use the Log Angle (red/blue/green) nodes to acquire your data. This lets you sample at a specific rate for a given amount of time and saves the data to a file called RedData.dat, BlueData.dat or GreenData.dat depending on the color of the Log Angle you chose
  • Anthony DiVirgilio on 26 Jan 12
     
    how to log data
Declan Coen

PID Controller For Lego Mindstorms Robots - 7 views

www.inpharmix.com/...or_Lego_Mindstorms_Robots.html

pid nxt

shared by Declan Coen on 12 Mar 12 - Cached
  • light sensor "sees white" then we know it is left of the line's edge (and the line). If it "sees black" then we know it is to the right of the line's edge (and on the line). This is called a "left hand line follower" since it is following the line's left edge
  • We need to know what values the light sensor returns when it "sees white" and when it "sees black". A typical uncalibrated sensor might give a "white" reading of 50 and a "black" reading of 40 (uncalibrated, on a 0 to 100 scale). It is convenient to draw the values on a simple number line to help visualize how we convert light sensor values into changes in the robot's movement.
  • Below are our made up light values for white and black.
  • ...4 more annotations...
  • We'll just divide the range into two equal pieces and say that if the light level is less than 45 we want the robot to turn left. If it is greater than 45 we want to turn right. I won't go into how exactly the turns should be done. I'll just say that gentle turns work well for a fairly straight line
  • line with lots of curves usually needs to be making sharper turns. For gentle turns you might use Power levels of 50% on the fast wheel and 20% on the slow wheel. For sharper turns on a curvy line you might need to use 30% power for the fast wheel and coast or brake the slow wheel. Whatever power levels you use the numbers will be the same for the two turns, you just switch which motor gets the big number and which get the smaller number (or a stop command).
  • This type of a line follower will follow a line but it isn't very pretty. It looks OK on a straight line with with the motors programmed for gentle turns. But if the line has any curves then you have tell the robot to use sharper turns to follow line. That makes the robot swing back and forth across the line. The robot only "knows" how to do two things; turn left and turn right. This approach can be made to work but it is not very fast or accurate and looks terrible.
  • In the above approach the robot never drives straight, even if it is perfectly aligned with line's edge and the line is straight. That doesn't seem very efficient does it? Lets try to fix that. Instead of dividing our light value number line into two regions lets divide it into three.
  • Anthony DiVirgilio on 12 Mar 12
     
    seems useful for following a line effectively
  • ...1 more comment...
  • Thomas Corcoran on 12 Mar 12
     
    this is a really good technique
  • Declan Coen on 12 Mar 12
     
    the top of this article explains how it would be easier to follow the edge of the line rather than the center of the line. As it detects the white it will turn back to the black and as it detects the black it will turn back to the white.
  • Thomas Helm on 12 Mar 12
     
    i found the edge thing on another site too
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