SE Steering Questions - Page 3

cool_cars · #31 11-21-2003, 05:28 PM

See, that's awesome! When did you buy yours? So the servo doesn't make a chattering noise when you come out of a turn into a straight? If it's a brand new car that just came into the store, maybe RS is getting this fixed. Like I said, my Savanna was really good out of the box too, but I don't like the servo chatter and the turn radius still was not as good as it is now that I've tweaked it. For me, it was just a personal preference on it.

cyborgzero · #32 12-08-2003, 10:30 AM

well i finally fixed my SE steering problem.

First off, do the encoder pot wire mod
then, trim the steering rack so it no longer has that tab sticking towards the pinion gear
then, the rack should be long and thin and allow FULL movement..

This works GREAT!!! I haven't had ANY problems with it AND I can steer so tight I can drift really well now.

Rob

Lord_HelmetR34 · #33 12-08-2003, 10:47 PM

I actually bought it three or so weeks ago. I think that what happens is when they first start mass producing these things, (like automobiles) because they are working on a deadline, that they rush development, and it causes a lot more problems in the long run.

GerG · #34 12-14-2003, 06:29 PM

Mine chattered too but all i did was ajust the steering trimm and it was fixed.

how much chatter was it and how tight does it steer

Jumbosheet · #35 12-18-2003, 06:09 PM

Ok, So I did the potmod fix for the 5 steps right/1 left problem and got 5 right/5 left, but for me it was sooo sensitive it might as well have been 1 right/1 left. So, I went with Cool_cars idea about a couple resistors parallel to the steering pot to
reduce the sensitivity. Long story short, I put a 1/8 watt 2.2k (red-red-red) resistor parallel to each side of the controller steering pot and now lock to lock is 1/3 of a revolution of the steering wheel instead of the 1/8th of an inch it was.
Also, in messing around with the steering, I found 1 step that is 2-3 times as large as the others aaand it is the center step of the 7 left/right steps possible with the steering connecting rod off. So if you adjust the controller steering trim so that the big step is in
the middle, you get a nice dead zone around center. Tape over the trim when youre done, its easy to knock out of alignment.

Now I've got an SE that performs as advertised. Couldn't have done it without your help though, Thanks.

charliebrown · #36 12-18-2003, 08:29 PM

Well, I created a thread to help this problem,

http://tinyrc.com/forums/showthread....threadid=16198

charliebrown · #37 12-25-2003, 08:04 PM

Oh, and btw, how can you drift these things when they are so heavy and flip all the time?

Chuckster...

cyborgzero · #38 12-25-2003, 10:31 PM

I did a fet mod on my car and put on the 3.4 motor.. I got a 3.8 but it sorta sucks for drifting.. Not enough torque.

The 3.4 nos motor and the fet mod is just INCREDIBLE for drifting..

Rob

Nutjob GTO · #39 01-17-2004, 06:28 AM

Heh, this's probably old news, and I know there's a second thread for this, but I thought I'd put it here, first, because I'm asking about a message on this thread.

Jumbosheet, you mentioned putting resistors alongside the steering pot to 'dull down' the steering response some.

This is me just reasoning out the problem, but... Is there any reason you couldn't put in a couple of pots instead?

If increasing their resistance would dull the steering response on that side, then it stands to reason that you could use an extra two pots to 'dial in' the controller's steering sensitivity even more, maybe even enough to get the full throw of the car's steering mechanism without the parts jamming up on the chassis as an 'end stop'.

Heck, if you started kitting it out for drag races, you could even dial out the steering even more, to make it easier to make small corrections on your tracking.

cyborgzero · #40 01-17-2004, 09:08 AM

Thats how I figured out what resistors to put into the car to bias the steering response..

YOu can't fit pots in there cuz they are too big, BUT you CAN use pots to figure out a good steering adjust, then get standard resistors and replace them with the pot values.

Rob

Nutjob GTO · #41 01-17-2004, 09:32 AM

Well, not directly on the circuit board, no, but... Is there enough room to route wires, and drill a couple holes through the top of the case, then pop them up through there?

I was thinking more of being able to adjust their settings on the fly...

Hm. Now that I think about it... How about adding just a single pot (Or resistor), inline with the steering pot's input feed? It'd have to be of higher value, sure, but then you're working with just one finicky bit, not two;

And if you make it an adjustible Pot, you'd be able to evenly tune your steering speed in both directions, not the left and right steering seperately.

Jumbosheet · #42 01-18-2004, 03:07 AM

Nutjob, what I know about servos you could fit on the head of a pin, but I think the idea was to lower the resistance on each side of the pot. A parrallel or side by side connection will lower the resistance, a series or "in line" connection will raise the resistance.

So I'm thinking that the single pot inline wont work, but if you were real creative I think it's possible to mount a couple of small "trimmer" pots parrallel to the steering pot.

Having said that, on other controllers (mini-z) there is a steering sensitivity adjust that does just what you are talking about with a single pot. I'm not sure how it works or if it could be adapted to the SE but maybe someone else knows.

Jumbosheet · #43 01-18-2004, 03:23 AM

PS I did the same procedure to 2 more cars, it worked but I ended up lowering the resistance a bit, I forget now what the values were. Cyborgzeros idea about using pots to figure the final value is a good one, gets to be a pain trying different resistors.

Also I got lucky on the first car with the large step right in the middle, but the steps do vary in size so you can try to center the steering on a large step.

Nutjob GTO · #44 01-18-2004, 04:09 AM

Wait, hang on a second...

When you're putting in the new resistors, are you connecting them... Hang on a second.

There. Which of the two are the way you're setting it up? Bridging around the pot, or tacked on after it?

Jumbosheet · #45 01-18-2004, 05:42 AM

bridging around as in the second pic.

If I remember right, the pot is 10k ohms, so 5k on each leg. if you put a 5k resistor in parrallel to each leg, the resistance goes down to 2500 ohms per leg, 5k total. With the lower resistance it takes more movement on the wheel for the circuit to get the resistance it's looking for.

If you put the resistors in series(first pic)resistance goes up and I assume the sensitivity would go up as well.

Hope that made sense, I'm a bit punchy.