A porportional steering thread

Schr-eng · #1 11-23-2002, 07:58 PM

I kno i said something about this in my last post, so lets move that over here instead.

Im thinking about installing some sort of steering mod in my car, but am stuck...

My Idea is to first upgrade the suspension, and then remove the coiled copper wire electromagnet and replacing it with a lower-resistance wire like gold or platinum (would those work for lower resistance?)

Getting the effect of porportional steering (am i spelling that right?) would not be much of a problem, simply integrate a voltage-varying system to power the coils, but the problem lies in the input for that system...

How do I use channels to get it to work?

Blue Bit · #2 11-23-2002, 08:06 PM

there is a kit that makes a Bit car have proportional steering. It used Infrared like the digi-q's. check this page out. If you figure out how that works then perhaps you can build one yourself

http://www.tapspring.com/

Sniper596 · #3 11-23-2002, 08:06 PM

well.... for the input section, i may have a solution for you. But first i need to know some information. What freqency is your bit? Are you into larger r/c which i mean that uses those big controllers that carry 8 aa batteries.

Anyway my plan if all goes well is to use one of those 'real' controllers to control your bit. You just simply need to get the correct crystal into the controller. That's only for the input section though....

Btw if you have a 27 mhz microsizer/bit it might simplify things, but i'll describe a little more later after you answer some of my questions.

Schr-eng · #4 11-23-2002, 08:11 PM

Well, ive got a 27mhz Micro-sizer (the red lancer if that makes any difference).

Also, ive got an R/C boat controll (the controller is very similar if not exactly like a normal RC car pistol grip style), and an RC airplane controller.

Sniper596 · #5 11-23-2002, 10:33 PM

well that gets you somewhere. What frequencies are your boat and air controllers?
read on a chart that certain frequencies were reserved for specific tasks. For land r/c such as 1/10 cars, they use 27mhz, and 75 mhz. They have a chart on the web that shows what other frequncies are reserved for different tasks.

Dracos · #6 11-24-2002, 12:25 AM

http://www.tinyrc.com/forums/showthr...&threadid=3030

Schr-eng · #7 11-24-2002, 12:43 AM

Yah, Dracos- that's the big question, isn't it?

It would seem that adding another reciver set would be too bulky and slow the car down a great ammount...and I don't think this is a task suitable for timer circuits like the turbo project going down at Bit-Sci.

I'm too lazy to find the frequency that the pistol-grip is at

but I don't think it will matter because I can just switch the crystal on it- it's one of the higher quality pistol grips.

Does anyone know about how channels work on R/C cars? Imput about that would be of great help.

Schr-eng · #8 11-24-2002, 02:02 PM

I think I just figured it out....

One method that is used to create alter the output speed of the motor is to adjust the input given by the controller...the signal given by the controller is given in pulses of "on" and "off". The longer the off position, or the shorter the on position, the slower the motor moves. These pulses ocilate fast, so it isn't noticeable by human eyes.

The BCG controller isn't advanced enough to alter it's channel signals to change the input. The modification of the electronics shouldn't be too hard to allow change in ocilation, but the problem would be modifying the keys on the pad to make the difference.

Ovgron · #9 11-24-2002, 02:07 PM

what porportional steering? (i have no clue what it is at all, not even a little bit)

Sniper596 · #10 11-24-2002, 02:12 PM

Quote:

Originally posted by Ovgron
what porportional steering? (i have no clue what it is at all, not even a little bit)

well it's basically like steering a real car, you have many degrees. With our small bit char gs we have 3 different degrees in terms of steering which is neutral (no steering at all) full right, and full left. With digital proportional you basically get an infinite amount of different degrees allowing you take turns much more smoothly rather than clicking the buttons on your controller really fast.

Schr-eng · #11 11-24-2002, 02:13 PM

Porportional means that you can choose how much it changes....

Like it's not allways good to have cars pointed all the way to the left or all the way to the right like BCGs, that would result in a lot of accidents

So if you wanted the car pointed just a little to the left, or a little to the right, that means its somewhat porportional.

Also, in real cars, if you press the gas harder, the car will go faster. It's not just an on or off thing, there are varying degrees of on.

Sniper596 · #12 11-24-2002, 02:16 PM

Quote:

Originally posted by Schr-eng
Porportional means that you can choose how much it changes....

Like it's not allways good to have cars pointed all the way to the left or all the way to the right like BCGs, that would result in a lot of accidents

So if you wanted the car pointed just a little to the left, or a little to the right, that means its somewhat porportional.

Also, in real cars, if you press the gas harder, the car will go faster. It's not just an on or off thing, there are varying degrees of on.

well that was 10x better explanation than mine

Ovgron · #13 11-24-2002, 02:16 PM

ohhhhh, i get it. Wouldnt you have to get a different remote?

Sniper596 · #14 11-24-2002, 02:17 PM

Quote:

Originally posted by Ovgron
ohhhhh, i get it. Wouldnt you have to get a different remote?

yes, that's why hes thinking of using a pistol controller.

pistol controller- a controller shaped sort of like a pistol (hence the name) with a wheel that has several degrees that can be turned a little or alot. Same with the trigger, it's proportional too.

Nightwing · #15 11-24-2002, 04:49 PM

May want to grab one of the Micro Blast Racers found at TRU. They use a motor to steer the car. Be beter to pulse than the field coils.

PS: The IR board only varries speed and not steering.