[FTC]: REV Slide

[RRLedford]

Originally Posted by Jeremy1410

Hi guys,

So for this year, our team was thinking about using an 80/20 slide for lifting objects, but after doing some research, it seems as if teams prefer REV lifts instead. So, I have questions regarding it, if you have information
1) Does it weigh a lot? I read some people were saying that it still weighed a bit too much, but still was pretty lightweight.
2) Does it have the same strength as an 80/20 lift?
3) What causes different levels to move up? Is it pulley based, motorized, or something else?
4) How would one attach these to TETRIX pieces? Would the brackets work?
Thanks in advance for any help.

Regards,
Jeremy

The 1" 80/20 framing is overkill on strength as well as weight. Even with a single set of columns. The concern for strength needs to be focused on the fasteners & brackets, the sliding blocks that interlock the frame columns, the cord, and the cord wrap scheme.

The nylon sliders blocks do make better/stronger engagement with the 1" 80/20 framing than some of the smaller sliders for 15 or 20mm (Rexroth or 80/20) framing. We haven't tried the 15mm REX frame yet and even though it is 7000 series much better aircraft strength aluminum, the 3mm fasteners are IMO just too weak of a size fastener for stiff joints that will not shift or loosen with cyclic loading. We use both 10-32 and 4mm hardware with the 20mm and the 1" framing too. If loading is high, we try to use 10-32 as much as we can.

Last year we had an elevator using only a single set of 1" 80/20 frame elements and the cord was wrapped so that all moving frame elements extended at same time. This made it one of the fastest elevators we saw and it was carrying a sweeper bin using a TETRIX motor with chain and sprockets, and having a servo actuated dump door. With a solid mounting at the frame, this elevator remained very stable even when extended all the way up to the high goal.
It was the best preforming assembly on either robot build by our school's two teams.

-Dick Ledford