2019:Drive Base

Decisions and Specifications

NOTE: All specifications are per robot

Weight of Drive Base:30.6 lbs (1/13/2019)

Dimensions: 34-1/4"L x 25"W x 4.312H

Length: 34-1/4" corner bracket to corner bracket. Channel length 34"

Width: 25" from the tip of the axel(L) to tip of axel(R)

Heigth: 4.312" from the floor to top of frame channels.

Bottom: 1.312" from floor to bottom of frame channels.

Wheels: 4 x 4" Omni wheels at the corners of the drive base. 2 x 4" Colson wheels in the center of the long dimension

Belts: 150mm length x 9mm width x 5mm pitch (quantity: 4)

Motors:CIM (quantity: 4)

Drive Base Frame Materials:

Left & Right Rails: 1"x3"x1/8" L-channel is used for the left and right outer frame rails. 1"x3"x1/8" C-channel is used for the left and right inner frame rails.

Front & Back Rails: The front and back frame rails are 1"x3"x1/8" tube. Bottom center is relieved for clearance.

Final Drive Base Design:

Activity Log

Saturday Kickoff

Jonathan Farnham

Kickoff
Prelimanary ideas developed by drive base team
Areas of concern
- Ramp to H1: 3 inches
- H2 height above bumpers
- Drive base will never scale H3

Sunday Week 1

Jonathan Farnham

Developed four inch wheel prototype
Used field to test four inch wheels on ramp

Used cad to study wheels needed for H2
- Tested 4,6,and 8 wheel configs

Tuesday Week 1

By Jonathan Farnham

Decisions being made about drive train configuration
- Wheel size decisions need to be made
- Choice of motor needs to be made: Cim or Neo
- Number of wheels needs to be decided
Mr.C developed skid plate study for 4 inch wheel

Developed cad prototype base on variant of last years drive system

Waiting on decision from strategy about habitat 2 or habitat 3 requirement
- Does drive base have to scale H2?
- If we scale H3 then can we use smaller wheels on drive base?
- Does drive base have to develop H2 solution?
Length of robot has been decided to be 34in.

Wednesday Week 1

Making the left and right side of the potential drive base.

Thursday Week 1

Work on L channel frame continues

Began assembling belt drive mockup in CAD

Work on C-Channel frame to include holes at 1" spacing

Saturday end of week 1

The sprint is on to complete the CAD work for the drive base
Enough of the robot is in the final assembly drawing to allow other sub-teams to start relaize their designs.
Added corner bracket to stiffen the frame. This increased the length (and perimeter).