> For the complete documentation index, see [llms.txt](https://docs.wcrobotics.org/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.wcrobotics.org/engineering/2021/climber-prototype.md).

# Climber Prototype

## Our Progress

* We are prototyping a small, two-stage telescoping arm.

#### Materials:

* Stages:
  * Base: 1" Poly Pipe
  * Stage 1: 3/4" Poly Pipe
  * Stage 2: 7/16" Dowel Rod
* 3D Printed End Caps [Onshape Link](https://cad.onshape.com/documents/0c6a4450f7f5a0adf0170553/w/f66b70902252c0ff202d437f/e/ae601808d9fa45c867c1db3a)
* Tape Measure
* 3D Printed Spool for Tape Measure: [Onshape Link](https://cad.onshape.com/documents/3589d360dee2574fbf86cc4e/w/669b0791164f32a6cbda08ce/e/4b99d9537469fc3643a9e0b9)

#### 4/29/2021

* After some trial and error with the 3D printed fittings, assembly is starting to come together.

![Retracted](/files/-MZU04Eb4-BxFi9rTBNJ)

![Extended](/files/-MZU08b-ytDiphQmiODt)

#### 5/11/2021

Worked on the tape measure spool, and determined it needed a cover to help make sure the tape was contained and did not unwind too much.

[Onshape link to the spool & cover](https://cad.onshape.com/documents/3589d360dee2574fbf86cc4e/w/669b0791164f32a6cbda08ce/e/4b99d9537469fc3643a9e0b9)

![Spool for Tape (3D Printed)](/files/-M_WYhZOLJYdE9JyuqDO)

![Spool with 3D Printed Cover (to keep the tape from unwinding)](/files/-M_WYpuGLevZYdvFd94n)

#### 5/12/2021

![Completed Prototype, Extended](/files/-M_WWbjgc01N8rVG-Ezt)

* The "proof of concept" is there, but we learned a lot, and would make many changes.
* Tape measure is flimsy and this method does not reliably extend the tape measure.  Extending the tape measure works, but not very well.

## Inspiration

{% embed url="<https://youtu.be/15YOchaDkHU>" %}

{% embed url="<https://youtu.be/rL0DOGykUOE>" %}

{% embed url="<https://www.chiefdelphi.com/t/steel-tape-drive-for-telescoping-arm/383667>" %}

#### Another effective & simple climber:

{% embed url="<https://youtu.be/wDA8nOZNZl0>" %}


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