Arm mechanism

[dtengineering]

Originally Posted by team 2191

How does having a telescoping arm sound with rollers inside??

It sounds like "whirr" if you do it right, and "clack clack grunge snap @$@%^!!" if you don't.

You may also want to look at the IGUS bag of materials and contact them about their YES program. IGUS is very generous about donating some excellent materials to teams, so if you see something you like in the KOP and would like more, you should contact IGUS with your ideas.

There is also a powerpoint on lifts and how to build them on the FIRST website somewhere... anyone got the link to that one?

Jason

[DonRotolo]

In 2005 we had a telescoping arm which had HDPE (High-density polyethelene) blocks inside on which the aluminum rectangular form slid, instead of rollers. The friction is quite low, the simplicity, stability and durability quite high. Let me know if you need more details.

Don

[lukevanoort]

Originally Posted by Don Rotolo

In 2005 we had a telescoping arm which had HDPE (High-density polyethelene) blocks inside on which the aluminum rectangular form slid, instead of rollers. The friction is quite low, the simplicity, stability and durability quite high. Let me know if you need more details.

Don

We did the same thing (same year too) and I would warn against it. Although the basic design is solid, we discovered that HDPE blocks cut in dry, cold January don't work too well in humid, warm Atlanta. Instead of HDPE, I would used UHMW (Ultra-High Molecular Weight) Polyethylene, which doesn't have those problems (or, at least, not anywhere near as bad).

[team2061]

Can someone please email me with details on how to make a telescoping arm because i dont really understand how to make one or even how it works.

[kramarczyk]

Originally Posted by dtengineering

There is also a powerpoint on lifts and how to build them on the FIRST website somewhere... anyone got the link to that one?

Is Building Competative Manipulators by Greg Needel the one you are thinking of?