Difference between revisions of "FTC 7314 Engineering Notebook 2015-11-04"

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!Objectives / Systems !! Hypotheses, tests, observations, conclusions, plans
 
!Objectives / Systems !! Hypotheses, tests, observations, conclusions, plans
 
|-  
 
|-  
−
| '''Objective in bold'''
+
| '''Complete Drive System'''
 
|  
 
|  
−
* Bullet point for each hypothesis, test, observation, conclusion, plan
+
* They replaced the (2) Tetrix drive motors with (2) am-2964a motors, thereby gaining integral encoders with the new motors.
−
|-
+
* It is clear that the worm gear - output shaft connection on the forward drive extension elevation is prone to slippage.  This connection is achieved via (2) small set screws on a 3/16" steel shaft.  Frankly, this connection is not likely to be adequate or reliable. 
−
| '''Objective in bold'''
+
* Plan for the worm gear output is to purchase the tooling to enable us to replace the 3/16" output shaft with a 6mm shaft ant to use a 2mm key to fix the worm gear and shaft in rotation.  Tools required are a 2mm end mill and a 2mm broach with 6mm bushing.
−
|
 
−
* Bullet point for each hypothesis, test, observation, conclusion, plan
 
−
 
 
 
|} <!-- End of tasks table; DO NOT REMOVE -->
 
|} <!-- End of tasks table; DO NOT REMOVE -->
  
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!Tasks !! Reflections
 
!Tasks !! Reflections
 
|-  
 
|-  
−
| '''Task in bold'''
+
| '''Replace Tetrix Drive Motors with am-2964a's'''
−
|
 
−
* Bullet point for each reflection
 
−
|-
 
−
| '''Task in bold'''
 
 
|  
 
|  
−
* Bullet point for each reflection
+
* Not a regular FTC Meeting.  Josh is present.  Working with mentor Gary Deaver.
−
 
+
* Driver for this work is the integral encoder in the AndyMark motors.  Gear reduction is 40:1.
 +
* Had to cut shaft on right side drive motor to fit.  No modification needed to left side motor.
 +
* Spacers were relocated for fit.
 +
* And a new platform cut.
 +
* We used new (longer) spacers to support the platform.  Old spacers reclaimed from FRC 1640 pivot modules.
 +
* Temporarily used shcs's for the platform.  Need to replace with fhsc's.
 
|} <!-- 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_151104-1.jpg|
+
image:ResQ_151104.jpg|Rendered SolidWorks model showing climber dumper (for autonomous)
−
image:ResQ_151104-2.jpg|
+
image:FTC7314_151104-1.jpg|AndyMark drive motors in place
−
image:ResQ_151104-3.jpg|
+
image:FTC7314_151104-2.jpg|Installing platform and elevation worm gear drive
−
image:ResQ_151104-4.jpg|
+
image:FTC7314_151104-3.jpg|Electrical panel in place
−
image:ResQ_151104-5.jpg|
+
image:FTC7314_151104-4.jpg|
−
image:ResQ_151104-6.jpg|
+
image:FTC7314_151104-5.jpg|Chassis weight right now (lb<sub>m</sub>)
−
image:ResQ_151104-7.jpg|
+
image:FTC7314_151104-6.jpg|Robot weight-in
 
</gallery>
 
</gallery>
  

Latest revision as of 00:33, 17 November 2015

Competition Season Meeting

Meeting Date Meeting Time Location Attendees
4-November-2015 6:00-9:00pm TCHS Brandywine Josh


Objectives / Systems Hypotheses, tests, observations, conclusions, plans
Complete Drive System
  • They replaced the (2) Tetrix drive motors with (2) am-2964a motors, thereby gaining integral encoders with the new motors.
  • It is clear that the worm gear - output shaft connection on the forward drive extension elevation is prone to slippage. This connection is achieved via (2) small set screws on a 3/16" steel shaft. Frankly, this connection is not likely to be adequate or reliable.
  • Plan for the worm gear output is to purchase the tooling to enable us to replace the 3/16" output shaft with a 6mm shaft ant to use a 2mm key to fix the worm gear and shaft in rotation. Tools required are a 2mm end mill and a 2mm broach with 6mm bushing.


Tasks Reflections
Replace Tetrix Drive Motors with am-2964a's
  • Not a regular FTC Meeting. Josh is present. Working with mentor Gary Deaver.
  • Driver for this work is the integral encoder in the AndyMark motors. Gear reduction is 40:1.
  • Had to cut shaft on right side drive motor to fit. No modification needed to left side motor.
  • Spacers were relocated for fit.
  • And a new platform cut.
  • We used new (longer) spacers to support the platform. Old spacers reclaimed from FRC 1640 pivot modules.
  • Temporarily used shcs's for the platform. Need to replace with fhsc's.

Action and idea Journal

  • Rendered SolidWorks model showing climber dumper (for autonomous)

  • AndyMark drive motors in place

  • Installing platform and elevation worm gear drive

  • Electrical panel in place

  • FTC7314 151104-4.jpg

  • Chassis weight right now (lbm)

  • Robot weight-in


Recorded by: Date: Journal Editor: Date:








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