Difference between revisions of "FTC 7314 Engineering Notebook 2015-10-10"
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!Objectives / Systems !! Hypotheses, tests, observations, conclusions, plans | !Objectives / Systems !! Hypotheses, tests, observations, conclusions, plans | ||
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− | | ''' | + | | '''Lynx Motion tread system data''' |
− | * | + | | |
+ | * The Lynx Motion tread system is (as advertised) a far more robust tread system than the Tetrix Treads. | ||
+ | * An assembled 32-link x 2" wide lynx motion tread weighs in at 376g; 11.75 g/link (0.0259 lb<sub>m</sub>/link). | ||
+ | * An assembled 6-"tooth" sprocket with a 6mm hub and (4) bolts (4-40 x 5/8" SHCS) weighs 26g (0.0573 lb<sub>m</sub>). | ||
+ | * An assembled 6-"tooth" sprocket with an idler axle with bolts and bearings weighs 31g (0.0683 lb<sub>m</sub>). | ||
+ | * The 32-link belt (main drive) has a measured C-C distance of 14 in. | ||
+ | * The 16-link belt (fore drive extension) has a measured C-C distance of 5-3/8 in. | ||
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− | + | |- | |
− | | ''' | + | | '''Conceptual design of hybrid wheeled/tread drive-train w/ fore-extension''' |
| | | | ||
− | * |} <!-- End of tasks table; DO NOT REMOVE --> | + | * 4 in wheels (tetrix) drive well on the floor and can climb initial horizontal bars in the lower section of the mountain. |
+ | * The 4 in wheels are helpless (without tracks) once the robot is onto the mid & high sections of the mountain. Except, the 4 in wheels can help prevent roll-down. | ||
+ | * Treads (tetrix treads) do not drive well in the floor. | ||
+ | * With a 50 deg angle in the high section, traction and center-of-mass are of first concern. | ||
+ | * Articulated forward tread extension facilitates climbing. It also allows center of mass to be shifted forward and down as the robot climbs, improving stability and traction. | ||
+ | |} <!-- End of tasks table; DO NOT REMOVE --> | ||
<br /> | <br /> | ||
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| '''Milling for chassis''' | | '''Milling for chassis''' | ||
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− | * Braden helped cut the parts for the center supports of the new | + | * Braden helped cut the parts for the center supports of the new chassis design,and also milled parts for the drive train of the chassis |
* Josh completed rough cutting all pieces of the chassis. He plans to mill most of the rough cut pieces on Monday. Josh used the horizontal band saw for a majority of the cuts, while using the vertical band saw for the few plates he had to cut. | * Josh completed rough cutting all pieces of the chassis. He plans to mill most of the rough cut pieces on Monday. Josh used the horizontal band saw for a majority of the cuts, while using the vertical band saw for the few plates he had to cut. | ||
− | *Daniel milled a 1-inch metal tube in half. Paul the mentor mentored Daniel on how to use the mill. | + | *Daniel milled a 1-inch metal tube in half for the front of the robot for protection. Paul the mentor mentored Daniel on how to use the mill. |
− | *today mentor paul taught trent how to mill for the | + | *today mentor paul taught trent how to mill for the chassis |
|- | |- | ||
| '''Installing Coding Programs''' | | '''Installing Coding Programs''' | ||
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*Justin was helping Amal with the computer program, and helping the people mill in the workshop. Justin was milling parts for the chassis. | *Justin was helping Amal with the computer program, and helping the people mill in the workshop. Justin was milling parts for the chassis. | ||
− | |||
|} <!-- End of tasks table; DO NOT REMOVE --> | |} <!-- End of tasks table; DO NOT REMOVE --> | ||
== Action and idea Journal== | == Action and idea Journal== | ||
<gallery widths=250 heights=250 perrow=3> | <gallery widths=250 heights=250 perrow=3> | ||
− | image:ResQ_151009-1.jpg| | + | image:ResQ_151009-1.jpg|Start of drive-train/chassis design |
image:ResQ_151009-2.jpg| | image:ResQ_151009-2.jpg| | ||
image:ResQ_151010-1.jpg| | image:ResQ_151010-1.jpg| | ||
image:ResQ_151010-2.jpg| | image:ResQ_151010-2.jpg| | ||
+ | image:FTC7314_151010-1.jpg|Paul works with Trent, Daniel & Justin - cutting metal for the chassis | ||
+ | image:FTC7314_151010-2.jpg|Making a motor count | ||
+ | image:FTC7314_151010-3.jpg| | ||
+ | image:FTC7314_151010-4.jpg|Measuring tread sprocket C-C distance of lynx motion treads | ||
+ | image:ResQ_151011-1.jpg| | ||
+ | image:ResQ_151011-2.jpg|CAD rendering with fore-drive unit deployed. drive chains added to model. | ||
+ | image:Chain_calculator_fore_angle_drive.jpg|Chain loop calculation - fore angle drive | ||
</gallery> | </gallery> | ||
Latest revision as of 04:07, 4 December 2015
Competition Season Meeting
Meeting Date | Meeting Time | Location | Attendees |
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10-October-2015 | 2:00-5:00 PM | TCHS Brandywine | Amal, Justin, Jacob, Trevor, Josh, Daniel, Trent, Braden |
Objectives / Systems | Hypotheses, tests, observations, conclusions, plans | |
---|---|---|
Lynx Motion tread system data |
|
|
Conceptual design of hybrid wheeled/tread drive-train w/ fore-extension |
|
Tasks | Reflections |
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Milling for chassis |
|
Installing Coding Programs |
|
Installing Android studio and milling |
|
Action and idea Journal
Recorded by: | Date: | Journal Editor: | Date: |
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