FTC 7314 Engineering Notebook 2015-11-04

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

We 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.