FTC Tips and Tricks: Lifts and Linear Movement

Quick guide to the pros and cons of linear movement drive and movement systems.
Our follow-on video to this is in • FTC Tips and Tricks: C... .

[@averagejoe6031]

Great video, this helped my team a lot when we we were unsure and unfamiliar with linear slides

[@AveryPambianchi]

You should make a more comprehensive video on stringing the slides going into how to properly spool the slides to get reliable motion, as well as maintaining tension on the string

[@thehandsomenipple3623]

you helped me visualize a project of mine a lot better thank you

[@otter7097]

we faced your team and we lost horribly, our robot just stopped moving on the left (your left) platform at the lexington thing

[@wegmansmc.wegman5669]

How much did that banner in the background cost ya m8s?

[@hamzabenbabaali1617]

thanks bro

[@MrDIYer]

hi, on 1:52. referring to the individual stage. is it gonna act or behave the same if you employ a block and tackle system of pulling it? your input would be much appreciated. thank you.

[@Brainstormers8644]

We are not sure what you mean, but a block and tackle will probably work the same way as the pulleys that we show.

[@MrDIYer]

@@Brainstormers8644 i meant with regard to the individual stage configuration, will employing a block and tackle system work the same way, that is, is it going to raise each mast one at a time. thank you for responding. appreciate it

[@danielgerdes8780]

how do you make a slide so goes up with a sting and down with a string so you could pull the robot with the slide

[@Brainstormers8644]

For the first style of stringing, you would connect another string to the top of the slide. One winch would pull on the original "pull" string as a second winch releases the second "release" string, and vice versa. You can see this at 0:45 in our RES-Q Robot Reveal video kzbin.info/www/bejne/gISsnKqunKhpa8U where the pull string is adjacent to the drawer slides and the release string is in the center, connected to the tray. The 2 winches would have the same circumference and spin at the same rate. For the second style of stringing, you would need a release pulley which spins twice as fast or is twice the circumference.

[@Brainstormers8644]

The easiest solution is to have both pulleys share the same axis of rotation. One string is wrapped clockwise and the other is wrapped counterclockwise.

[@varunv.p.7180]

I don't understand why you can't use the stringing method from the first lift to the second lift; it would save weight too. Also, in the 2nd method, can it be assumed that the final rack moves twice as fast as the one before it?

[@mmiao3498]

wut

[@luctimmen]

is there a way to calculate how much weight you can lift? because i want to lift a tv useing this metode but other materials

[@octaviososa2679]

That would depend on the stall torque of the motor you are using to pull in the cord. Which I also wanted to ask about. Anyone know what kind of motor is used for this? As in stall torque and type?

[@Brainstormers8644]

For RES-Q, we used 2 AndyMark Neverest 60 motors powering a ~3-inch-diameter pulley. With that, we were able to pull our 50-pound robot up to hang on the RES-Q high bar, but we were probably close to the stall-torque limit on those motors. You should be able to trade off speed for power by using smaller pulleys.

[@user-to9tc5tn5m]

Do you know how to make horizontal telescopic arm?

[@Brainstormers8644]

We give more details of how our Relic Recovery horizontal arm works in kzbin.info/www/bejne/jIXafHWAfq-jr9U

[@highschord7136]

What was the wire you used?

[@Brainstormers8644]

In the video and RES-Q, we used Shine Line string from Quality Nylon Rope. More recently, we also used Vectran-core string from West Marine.

[@user-go6ck4ti3b]

Where do we buy the sliders?

[@Brainstormers8644]

For Velocity Vortex, we used 15mm extrusion from REV Robotics, along with their 15mm linear motion kit. If you need something more heavy-duty, then you can try larger extrusion & connectors from 80/20. For RES-Q, we just used generic drawer slides from Home Depot which was connected to Tetrix C channels.

[@MrBonners]

Garden variety at any big box hardware store any where in North America.

[@jacobhoman5538]

Hi, my name is Jacob Homan. I am a Senior Mechanical student at Wright State University's Lake Campus in Celina, Ohio. For our Senior Capstone project, students are required to build an autonomous vehicle. I am intrigued with your lift and linear movement and would like to research further in regards to possibly pursuing this concept into our design. Can I please have your contact information so that I reach out and ask questions pertaining your lifting mechanism? Thanks in advance,

[@Brainstormers8644]

You can contact us at brainstormers8644 @ gmail.com (without the extra spaces)

[@Aidea-fn3zu]

My cranes chane like you

[@Alex-oz6xh]

better one inside other

[@giovella324]

Shrek is love Shrek is life