What motors are you using for your lift?

[Joshua Sicz]

Does anyone have any suggestions for what type of motor we could use for our lift? We found that bag motors are a little slow. We were trying to go with rs775's but having some trouble with the adapter. We only have 1 cim more allowed because we already used 5 on our drive.

And with that how did you guys hook up the motor? Planetary gear box? Simple box?

Just looking for some ideas.

I know of some team that is using a worm gear box so there is no drift.

Anyways thanks,
Joshua Sicz

[Mr V]

A 775 in the 18v version does have enough power to lift 3 totes and a container. A Mini Cim also works. Personally I love the Versa Planetary for this sort of an application. The 775 motors interface with it very easily. You can interface the CIM or Mini CIM with it but you need to cut the shaft to assembly it per Vex recommendation. You also have a huge number of possible gear ratios with the Versa Planetary.

[nickbrickmaster]

We're using 2 drive gearboxes with power take off, 2 CIMs per box. It's not quite enough to lift 3 totes, but we plan to gear it down more.

[MrForbes]

Our tote lifter is powered by a CIM, through a toughbox, and chain sprocket reduction, which powers a cam, that lifts the arm. Kind of complicated sounding, but it works.

Our container lifter also uses a CIM and toughbox, and even more chain sprocket speed reduction, and it's also counterbalanced with a gas spring, and Latex tubing.

Springs of some sort can really help reduce the load on the motor, if you can figure out a way to use them. Our container lifter is balanced so that it needs to be driven down with a little bit of force when not holding a container, and driven up with about the same amount of force when it is holding a container. This cuts the load on the motor by quite a bit.

[azcalg]

We're using a van door motor with a 3.5 in winch. It lifted all 6 totes and a recycling bin 6 feet in like 4 or 5 seconds with no problem. I think we might up the size of the winch to 5 in so it'll go a bit faster. Van door motor is probably the simplest solution for this game because it has tons of torque and it's fairly easy to implement (don't need a gearbox or anything).

[Walter Deitzler]

We are using a Mini-CIM hooked up to a 30:1 versaplanitary gearbox. It lifts our whole 70inchs in about 4 seconds and can handle up to (theoretically) 300 lbs. (We ran some tests to see how much it could lift, but we broke the scale before the motor failed.) We also have no drift simply due to the ration we are using, it being to hard to turn without a substantial amount of force trying to back drive it.

Good luck!

[Joshua Sicz]

Originally Posted by Walter Deitzler

We are using a Mini-CIM hooked up to a 30:1 versaplanitary gearbox. It lifts our whole 70inchs in about 4 seconds and can handle up to (theoretically) 300 lbs. (We ran some tests to see how much it could lift, but we broke the scale before the motor failed.) We also have no drift simply due to the ration we are using, it being to hard to turn without a substantial amount of force trying to back drive it.

Good luck!

Is this with all 6 + bin?

[BlueOps4216MrG]

We are using 2 snowblower motors direct driving opposite ends of a shaft with a pulley fixed in the center. It is essentially a winch. We only need to lift 2 totes max. at a time.

[jwfoss]

FRC558 is running a custom 18:1 worm gearbox with dual mini CIM input and for now a 4" diameter drum.

[Bryce Paputa]

Two CIMs on the lift. Jumping on the six CIM hype train here.

[GeeTwo]

One CIM on an 8.45:1 gearbox (same as on the KOP for interchangeability), geared down 32:15 by chain, then lifting using two #35 chains on 15 tooth sprockets. It has several times the lifting power we'll need, because we're going to try it without a brake. We're only using three CIMs for drive, so we are going to check the current draw when we hold the maximum load (4 totes) and add another CIM if it's much over 20A, or if we experience too much heating during practice. On the curves it looks like it'll be about 14A, which means about 170W, all going to heat when holding station on four totes. I really suspect that we are going to build a brake on Thursday and Saturday.

[Walter Deitzler]

Originally Posted by Joshua Sicz

Is this with all 6 + bin?

We have had some issues with the chain driving the shaft skipping after it is loaded with 3+ totes, but that is a tensioning issue, not a problem with the motor. We have pulled over 100lbs of weight up with it (which is more than 6x7.6lbs (totes)+ 8.8x1 (bin)) We will be doing some actual testing with some totes once the tensioning is worked out and the chain no longer skips.

[TikiTech]

We have set up two opposing VexPro 2 speed ball shifting transmissions.

One has 2 CIM’s the other is only used as a shift on the fly ratcheting system.
It lined up so nicely putting the transmissions together..

Gear ratios of 8.33:1 and 3.6:1 on a custom 3d printed 1” diameter spool and strap guide system.

Per the JVN calculator, our low gear should move our 60” lift system fully in approximately 2 seconds with a 40lb. load and a stall load of 570lbs at 10amps. The high speed, which I doubt we will use much, runs the loaded lift at less than a second with a stall load of 250lbs at 19 amps.

It is “overkill” and so is the lift system that goes with it..

We will be adjusting speeds this week to fine tune the lift. Sure do not need to launch those totes into the stands..

Good luck to everyone this year!
Aloha!

[Sperkowsky]

we are using 2 cim's that run through 76 to 1 planetary gearboxes. They have been a pain to mount but we got it mounted yesterday. Now we just need to make the elevator plate and the bracket that connects it to the fork

[Joshua Sicz]

Originally Posted by azcalg

We're using a van door motor with a 3.5 in winch. It lifted all 6 totes and a recycling bin 6 feet in like 4 or 5 seconds with no problem. I think we might up the size of the winch to 5 in so it'll go a bit faster. Van door motor is probably the simplest solution for this game because it has tons of torque and it's fairly easy to implement (don't need a gearbox or anything).

Very interesting, we have tons of window motors in our shop. We might have to try it.