Hello i was wondering can i use cascade lift as apulling system for hanging mech for over under i made some designs but still not sure if i open the cascade lift than hang top of the bar can i pull myself ?
No. Cascade will raise loads upwards but has no downward force, depending on gravity.
If you want a lift to pull downwards you would want a continuous chain lift.
But your motors will be INACTIVE/OFF after the match ends⌠so the lift wonât hold unless you add some other component to prevent movement.
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@turbodog Is correct. However, a creative rubber band mechanism could be used to try and make it work. It would absoluteley be difficult, however not impossible.
thank u for ur reply that helps me alot
im gonna give it a try cuz i want to see that mech work in game
This is not true; a cascade like Dreadnoughtâs in ITZ is powered up and down. Do you want to rephrase?
Link to a video/pic?
On cascade:
You may have to engage the motor as the lift comes down, but thatâs to match the chain slack as gravity pulls everything downward. If the lift is held and the motor engaged the chain will go slack and the lift will stay in place.
i think he means this https://www.youtube.com/watch?v=Yta_Nk7crSI&t=1s
Have seen that one a while back. If you hold the upper stages and reverse the motor, the stages will remain âupâ.
In the words of an old professor of mine âyou think thereâs compression in a rope?â
Stage 1: the one anchored to the chassis
Stage 2: the only stage that will come down⌠and thatâs only because itâs connected via continuous chain and is not really cascade.
Stage 3+: cascade stages
Ever seen a cascade lift âjumpâ on the way down? Thatâs whatâs going on here. The chain goes slack, friction holds the stage(s) in place, and eventually gravity/vibration/wiggling overcomes friction⌠then the stage(s) come down all at once until the chain goes tight.
Technically there is a way to do a powered down version, with inverting pulleys so one loosens as the other tightens, but its very difficult.
Blatantly untrue for the design on the video. In dreadnaughtâs cascade, the chain canât ever go slack because it surrounds the stage and therefore pulls on the way up and on the way down.
I thought cascade verbiage and mechanics were more common knowledge than it seems, my fault.
Pretty sure my cascade lift from a few years ago would pull both ways.
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Josh (team 1103) I think had a continuous lift, but for all the newbies who have never seen this it shows what we were doing 12 years ago with lifts and pneumatics.
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Iâll admit that the video linked by AyAss⌠I was going mainly from memory seeing it ~3 years ago. I did try and rewatch it after it was linked, but wanted to barf from the bad camera work after 15 seconds and quit watching.
90% of cascade lifts have chain segments between the stages, so weâre sort of getting into a terminology debate. The jpearman and Dreadnought videos will pull downward, but neither use chain segments, both are loops. Personally Iâd classify them as a continuous/cascade hybrid of sorts.
Given that the OP asked about this to explore being able to lift the entire bot and hang⌠with any of the (3?) designs thatâs probably going to be a ânoâ due to
- the chain backdriving the motor(s) after power is cutoff
- the weight of the load involved
Even running tandem/dual chains, a team runs a serious risk of snapping chains under this much stress/load.
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I saw that that made me think that can we use it for elevator time
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