2019:Drive Base: Difference between revisions
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== Decisions and Specifications == | == Decisions and Specifications == | ||
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'''NOTE: ''All specifications are per robot''''' | '''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 4.312''H'' | '''Dimensions''': 34-1/4"L x 25"W x 4.312''H'' | ||
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''Front & Back Rails: ''The front and back frame rails are 1"x3"x1/8" tube. Bottom center is relieved for clearance. | ''Front & Back Rails: ''The front and back frame rails are 1"x3"x1/8" tube. Bottom center is relieved for clearance. | ||
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== Activity Log == | == Activity Log == | ||
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=== <span style="font-size:medium;">Saturday Kickoff</span> === | === <span style="font-size:medium;">Saturday Kickoff</span> === | ||
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=== <span style="font-size:medium;">Sunday Week 1</span> === | === <span style="font-size:medium;">Sunday Week 1</span> === | ||
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=== <span style="font-size:medium;">Thursday week 1</span> === | === <span style="font-size:medium;">Thursday week 1</span> === | ||
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<span style="font-size:medium;">Saturday end of week 1</span> | <span style="font-size:medium;">Saturday end of week 1</span> | ||
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<span style="font-size:small;">The sprint is on to complete the CAD work for the drive base</span> | |||
* | |||
<span style="font-size:small;">Added corner bracket to stiffen the frame. This increased the length (and perimeter). </span> | |||
* | |||
Enough of the robot is in the final assembly drawing to allow other sub-teams to start relaize their designs. | |||
=== Sunday Week 2 === | |||
* | |||
Finite element alalysis on frame to test for weak points: | |||
[[File:Drive Base FEL Result 0 2.png|200px]][[File:Drive Base FEL Result 0 4.png|200px]][[File:2019 Drive Base FEL Result 0 57.png|200px]][[File:2019 Drive Base FEL Result 0 80.png|200px]][[File:2019 Drive Base FEL Result 0 81.png|200px]] | |||
* | |||
Drive Base weighed in CAD: 30.6 lbs | |||
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Revision as of 09:32, 13 January 2019
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.
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
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- 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
- Worked on L channel frame
- Began assembling belt drive mockup in CAD
- Started work on U-Channel frame
Saturday end of week 1
The sprint is on to complete the CAD work for the drive base
Added corner bracket to stiffen the frame. This increased the length (and perimeter).
Enough of the robot is in the final assembly drawing to allow other sub-teams to start relaize their designs.
Sunday Week 2
Finite element alalysis on frame to test for weak points:
Drive Base weighed in CAD: 30.6 lbs
