one control stick or two?

[346operator]

I am the operator for team 346(the ones who scored 346 at VCU), and the new disussion with my team is whether we should go to one stick control. As the driver i feel that two sticks gives me greater control over the robot, however i havent spent much time on one so it is hard to say. Does anyone have input who has tried both methods?

[Aignam]

I've tried both and I greatly prefer 2 joysticks to 1. While it may be true that 1 joystick can hit all of the inputs that 2 joysticks can, I still feel that 2 joysticks feels more natural and provides a more comprehensive control scheme.

[EricS-Team180]

Hi,
You might want to check out the thread:

1 stick drive to 2 stick drive

from 2003.

It's got a good debate on the subject.

I'm sure there are other good threads available, too.

thanks,
Eric Schreffler

[Aignam]

EricS has the right idea---search around.

You can find some good comments here:
http://www.chiefdelphi.com/forums/sh...ht=stick+drive

[Michael Leicht]

Couple drivers i know like the dual sticks but i like the single stick. plus i never have been on a dual sticks before.

[Tom Bottiglieri]

Originally Posted by punkrawker303

i like the single stick. plus i never have been on a dual sticks before.

Then how would you know you like the single stick better than the dual?

[Michael Leicht]

cause that is what my programmer said to me.

[Dave Flowerday]

Originally Posted by 346operator

I am the operator for team 346(the ones who scored 346 at VCU), and the new disussion with my team is whether we should go to one stick control. As the driver i feel that two sticks gives me greater control over the robot, however i havent spent much time on one so it is hard to say. Does anyone have input who has tried both methods?

When I was a driver for my high school team, I spent the first two years driving with dual stick control, and liked it a lot. My 3rd and final year, though, we had to switch to single stick control because we needed the other stick to manipulate our arms (this was pre-IFI controller days). Initially I wasn't very happy about the change and I thought that 2 stick gave me more flexibility. However, once I got used to single stick control, it was just as easy to use. In fact, I ended up greatly preferring single stick over dual stick.

Going from dual stick to single stick is an awkward transition at first, but it's pretty easy to get comfortable with it. Also, while dual stick may feel like it has greater control to some, I can't think of anything in particular that you can do with dual stick that you cannot duplicate with single stick.

[Marc P.]

I would guess it depends on the type of drive you use, speeds, straight tank drive vs. omni wheels, etc. I've driven primarily on dual stick on a 4 wheel tank drive, and prefer it in the sense that it gives you control of one side of the robot independently of the other. This can come in handy in a number of ways, especially when lining up for a precise task, or in a shoving match- it's nice to give more power to the side needing more force. The times I've downloaded the single stick drive for testing, I found the controls a little more intuitive, but I preferred having control over the individual drive sides.

[Pierson]

Our team leaves it up to the driver... Once we choose the driver they get to practice with both 1 stick and 2 sticks... they choose what they like better!

So... it should be up to whomever is driving and whomever is operating to choose what they want to use to be exact and precise.

[Tristan Lall]

188 has used 1-stick on most of the recent robots, with the exception of Blizzard 5. Why? My brother was driving that one.

Personally, I prefer the 1-stick drive, right-handed, and that's how I used it when I was driving Blizzard 4.

It isn't a difficult matter to program one or the other--so let the driver figure out what's suitable, because he's the one who's going to be using it.

[Blacknight]

I have to go with depending on the drivetrain.
Last year I drove an omni, and you need two, just for calibration problems, but I prefer one stick for tank drives. Not a big fan of two sticks other than for omni...

[jonathan lall]

Your team should really leave it up to your driver. There's code available online for both of these, so it certainly isn't a problem from a programming point of view. If your robot pulls to one side (this is prevalent in tank-drive robots with two identical gearboxes, wherein one side has motors driving in reverse and thus runs slightly slower), you might want to go one-stick, because straight lines are much easier to hold. However, you will find that cornering is a dream on two sticks and you can fluidly move around obstacles without slowing down. Two-stick is also quite a bit harder to truly understand so practice is very necessary. While it's certainly less intuitive, you should make the call early on whether it's worth it to learn two-stick properly, or if you should just do one-stick, which, as was mentioned before can technically do all or almost all a two-stick control can do. It really is your call, and neither is superior. Though two-stick is better.

I have driven both configurations, and while my recent predecessors opted for one-stick, I went to two this year. One of the main advantages of two-stick is its excellent conduciveness to turns (in tank drive). In a one-stick configuration, one must apply forward motion with the y-axis, while also concentrating on slowly and nonlinearly moving the joystick sideways along the x-axis. This results inevitably in jerky turns on occasion, especially very sharp ones (two years ago limbo bar to ramp comes to mind), no matter how good the driver is. Of course, there's a lot less thinking involved when driving one-stick by nature, so open space driving means you can just will the robot to a spot on the field.

Enter two-stick: it's much harder to control a jumpy or fast robot, but when going left around a corner for example, if you tap the left stick slightly back of centre (to apply some reverse current locking the left wheels) and at the same time throw some forward power into the right wheels, a very smooth, fast turn can be made. And just like driving a car, as you hit the apex, you can apply more and more juice to come out of the turn. You'll find you're rounding corners very fast.

I need not remind everyone that your control system should adapt to the game and function of the robot. The best advice I can give is let your driver tell the programmers what he or she wants, because if the driver's not happy, the robot won't drive well.

[Lisa Perez]

In addition to what everyone has said thus far, with two-stick it is somewhat simpler to adjust to problems with the drive (for example, one side may not be performing at the same speed as the other for whatever reason). Adjusting with one-stick is doable, but personally I believe it is much harder.

[Tytus Gerrish]

for a tank drive type system In my opinion 2 Stick is deffenetly better.