We’re about to rebuild our prototype and we’re wondering which is faster as far as speed of lifting goes a 6 bar or an elevator.
There are benefits and downsides to both. A 6 bar is easier to construct and usually (not always) faster. However, a cascade is linear and easier to drive with. We plan on making a lightweight dr4b. Each design has upsides and downsides that will depend on your overall design.
@Dromeda That took lots of tuning along with finding some custom parts like the spacers they used iirc. Overall, if you want a well competing lift that is also fairly speedy, a 6-Bar is the way to go.
You do not have to use custom parts you can just order the spacers from McMaster. Another good part of a cascade is it is scalable and also very stable.
@RupaliB Cascade all the way. 6 bars are usually ungainly and are a pain to position over poles to put on and remove caps. Like DR4Bs, cascades are linear motion, which is a blessing for drive practice.
It might be a blessing to have a linear lift, but the amount of time spent perfecting a cascade for even the smallest of heights along with the fact that DR4B's can reach just as high with greater speed already puts the cascade far down in my lists of lifts to use in this game. if you really want a linear lift in a small confined space, then yes go for a cascade. But just be aware of the struggles that come with it...
@Carter These parts are illegal
@OscarMNOVA12 If the spacers are equivalent in size and material they're legal
While identical spacers are certainly legal, so are many other spacers that are not Vex-equivalent. Take a look at rule <R7> c. With my highlighting the first sentence says, "Any commercially available #4, #6, #8, M2, M2.5, M3 or M4 screw up to 2" long (nominal), and any commercially available nut and/or washer to fit these screws." That means you are allowed to buy washers that fit any of these screws, regardless of material, so long as they're commercially available. The commercial term for these spacers is "washer," or more commonly "thick washer" or "extra-thick washer." That's how you find them in hardware stores.
Here are some McMaster Carr examples:
Nylon plastic (screw size, inner diameter, outer diameter, thickness):
No. 4 0.112" 0.206" 0.048"-0.058"
No. 4 0.115" 0.250" 0.057"-0.067"
No. 4 0.120" 0.220" 0.026"-0.036"
No. 4 0.120" 0.280" 0.026"-0.036"
No. 6 0.156" 0.312" 0.026"-0.036"
No. 6 0.156" 0.438" 0.035"-0.045"
No. 6 0.162" 0.312" 0.055"-0.070"
No. 8 0.173" 0.375" 0.055"-0.070"
No. 8 0.177" 0.408" 0.055"-0.070"
No. 8 0.188" 0.500" 0.035"-0.045"
They also have lubricant-filled nylon plastic, polycarbonate plastic, and UHMW plastic.
And there is plenty more variety of materials and sizes available from other vendors. You can also buy them too small for what you want (like No. 4 when you want No. 8) and drill them out with more readily available tools and probably with more ease than cutting the outer diameter down to what you want.