2017:Lifter: Difference between revisions
(Created page with "- climber can be placed at any height on robot and still grab a knot compatable with the rope rules") |
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- climber | 1/18/2017 | ||
- Velcro is allowed on ropes, assuming the rope follows all other rope criteria. See FRC Q & A #6 and #215: [https://frc-qa.firstinspires.org/qa/6 https://frc-qa.firstinspires.org/qa/6] [https://frc-qa.firstinspires.org/qa/215 https://frc-qa.firstinspires.org/qa/215] | |||
- Originally we planned to make a "finger" based climber but we realized that the "fingers" sometimes pushed the rope away instead of catching it. This made the climber require a longer amount of time to align. | |||
- To circumvent this issue, we designed another prototype. This second model used velcro to catch a velcro rope. It is much smaller and easier to assemble, therefore taking up less space and time. Inspiration was derived from Ri3D 1.0 | |||
[https://www.youtube.com/watch?v=h6_UBzGQM-A https://www.youtube.com/watch?v=h6_UBzGQM-A] | |||
- We would also like to implement a "flip" mechanism which would transfer the climber from inside the hopper (most likely) to the outside of the robot, above the bumpers. | |||
1/28/2017 | |||
- Moving forward with velcro climber | |||
- Decided on the use of 2x 775Pro Motors with a Dual Input 35:1 (5:1 and 7:1) Gearbox | |||
- In progress: detection of top of rope, brake/lock to prevent descension | |||
- Implementing sensors | |||
- Considering the use of a wratchet and pawl lock (similar to 2016) | |||
- Rope will be made of a tie down strap with velcro sewn on | |||
- Will explore the possibilty of using a rope that does not touch the ground and one that does | |||
- Controls: a need a joystick/toggle to ascend/descend, toggle to engage lock, servo/solenoid to relsease flip mechanism (toggle) | |||
1/29/2017 | |||
- Controls needed: input to initiate and maintain climber | |||
- Auto flip out (needs to be actuated, not gravity propelled) | |||
- Confirmed locking mechanism of a ratchet, pinned between two 1/4-20 bolts | |||
- Updated CAD model | |||
- Decided against the use of sensors | |||
Latest revision as of 15:11, 29 January 2017
1/18/2017
- Velcro is allowed on ropes, assuming the rope follows all other rope criteria. See FRC Q & A #6 and #215: https://frc-qa.firstinspires.org/qa/6 https://frc-qa.firstinspires.org/qa/215
- Originally we planned to make a "finger" based climber but we realized that the "fingers" sometimes pushed the rope away instead of catching it. This made the climber require a longer amount of time to align.
- To circumvent this issue, we designed another prototype. This second model used velcro to catch a velcro rope. It is much smaller and easier to assemble, therefore taking up less space and time. Inspiration was derived from Ri3D 1.0
https://www.youtube.com/watch?v=h6_UBzGQM-A
- We would also like to implement a "flip" mechanism which would transfer the climber from inside the hopper (most likely) to the outside of the robot, above the bumpers.
1/28/2017
- Moving forward with velcro climber
- Decided on the use of 2x 775Pro Motors with a Dual Input 35:1 (5:1 and 7:1) Gearbox
- In progress: detection of top of rope, brake/lock to prevent descension
- Implementing sensors
- Considering the use of a wratchet and pawl lock (similar to 2016)
- Rope will be made of a tie down strap with velcro sewn on
- Will explore the possibilty of using a rope that does not touch the ground and one that does
- Controls: a need a joystick/toggle to ascend/descend, toggle to engage lock, servo/solenoid to relsease flip mechanism (toggle)
1/29/2017
- Controls needed: input to initiate and maintain climber
- Auto flip out (needs to be actuated, not gravity propelled)
- Confirmed locking mechanism of a ratchet, pinned between two 1/4-20 bolts
- Updated CAD model
- Decided against the use of sensors
