Arm mechanism

[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.