ok now I’ve got the immediate satisfaction jones going and want to hook an r/c radio up to mine.
must… fight… temptation!!!
lol, did you calculate the speed yet? I did for mine just now for my science fair project and I got this : average meters per minute,
7.7m in 5.5s. I calculated the average speed per minute below:
Convert seconds to minutes. 5.50s / 60.00s = 0.09min
Vav = Δd = Vav = 7.7m
--------Δt------------0.09min = 85.56m per minute.
From these calculations I can predict that the Spy 2 can travel an average speed of 85.56m per minute.
I think this is correct for calculating the average speed. Let me know if it isnt.
Yours does 1.426m/s. Thats pretty darn fast! You can use it as an example moving object in high school physics problems 
well mine has a calculated theoretical max of about a meter a second, but I doubt the motors have enough torque to do that. 
I think it is correct. I timed how fast it took to move 7.7m (thats the length of my hallway) which was 5.5s. Than I did the math (average speed formula) and got that asnwer. Is it correct? I need to know becuase Its for a regional science fair. It seems correct because I am using this formula in science class this week.
Seems correct to me.
You could have just done delta-d/delta-t = 7.7m/5.5s = 1.4m/s
There was some error because of the rounding converting to minutes. Most of the time, speed is referred to as m/s or distance/second. Lynxmotion has this wonderful little tool:
lynxmotion.com/images/html/wheelspd.htm
You can do a bunch of stuff based on knowing two of the following vars:
RPM
wheel diameter
speed
Of course that would be the theoretical speed or whatever you calculate for. It doesn’t include the fact that the motors might be too weak or too powerful.
well I had to convert seconds to minutes to calculate M per min, not m per sec. So 85.56m per minute should be correct.
but m/min is hardly ever used :S But alright. If you want m/min then its 85m/min
7.7m/( 5.5s/60s ) = 85m/min
You never round until the end. Then you round to the number of significant digits you need.
I know that it is rarely used, but I for driving long distances, I needed the average speed per minute instead of per second. I drive ussually for like 2m straight with my bot, (especially when Im chasing people) so it works out for me 
WOW! Wich motors do you have chunga?? and you to Italian guy? pretty fast over a meter per second! i’d get about a feet per second, wich is realy low compared to the crazy 1.4 meters! 8),maybe I will go with some gear head instead
Personally, I also think you should. They’re deffinately bang for the buck even if they aren’t as powerfull as planetary they compensate for good amount of torque and RMP’s. Deffinately a good choice, thats my 0.02.
yeah, I’ve seen taht the GM-13 are still being sold at robotshop, do you know why LM stop making them? is there a problem? poor qualety?
hmmm not sure at all. I think once these bad boys came in, they took them out. For a couple dollars more their worth the torque and RMP’s.
lynxmotion.com/Product.aspx? … egoryID=11
though the Link are what I use. The RPM’s are good and torque is even better! 8)
I just need to order more that’s all.
cough hijackers cough , jk, dont worry about it
anyway, i got the rover back up and running by switching one of the non-attached-to-the-motors-sprockets with the broken one, and it works beautifully
i was about to do some tests wen the batteries crapped the bed on me 
and wen i went to use my replacement batteries, i found that they were not charged 
, so right now im charging the 2 pairs of battery packs which took quit a qwhile, plugged them in at 5 yesterday, and they weren’t done at 10 wen i went to bed, they were finally done this morning 1 down…3 to go
as soon as i get some money ill will be buying the LM tracks, sprockets and the rest i need to make this thing have more traction, im going to have to make some new side types to compensate for the bigger sprockets but it should look good ill take some better videos after school today i will also satrt working on code to make it autonomous, ttyl when im otta school, later
well, considering the fact that i want to put on an arm on the bot, i have to resign the chassis and make it much bigger
i plan on making the arm with linear actuators and the bot is expanding to a massive 9" x 12" (the base of the arm alone will be 15" O_O) so it will hang off the back of the rover >_>
but, it will get the job done in lifting power, i plan of making it with 110 lb force actuators 
anyway, lemme know wat u think, ill be getting more in detail once i get everything for sure and i have more time to talk about it
110lb torque actuators! Thats gonna cost a few pennies!
yeaaaah, pennies, it’s like 150$ a piece xD. but it’s gonna be powaful
wich ones do you count on using chunga?
I was geussing something like the ones they got at robotshop.ca. They seem to be bang for your buck.
but, what’s 15 N’s? I know its the force, but, any explanations? they do look good, it would be fun to do an arm with them.