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71
Mechanics and Construction / Re: Need Help with a Rear Wheel Drive Car Style Robot
« Last post by Gertlex on December 01, 2014, 07:40:11 PM »
The wheel/tire can always add a level of shock absorbing.

I'd be more concerned about what happens when you flip the car at 30 mph (or 10 mph even).

(I'd suggest splitting up that giant paragraph into a few coherent pieces. I might have had ideas while reading it, but lost track of them in keeping track of where I was in that paragraph...)
72
Software / Re: WebbotLib Studio Release
« Last post by Webbot on December 01, 2014, 06:11:53 PM »
Version 1-17 is released. . Check out the News page http://webbot.org.uk/iPoint/35.page
73
Software / Re: 50 dollar robot building error
« Last post by Zevoo on December 01, 2014, 12:45:42 PM »
I have first added the files that are on the picture. I built the code and it output an error SINGAL(SIG ADC) which I got a fix for before ISR(ADC vect). Rebuilt the code and it was successful. Uploaded the HEX file that was made when I built the code. Uploaded it to the robot but the robot didn't even move.  Then I realised that I didn't add the rest of the files shown on the same picture. Rebuilt the code and I got the following errors shown on the 2 picture.
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Mechanics and Construction / Need Help with a Rear Wheel Drive Car Style Robot
« Last post by Schlayer on December 01, 2014, 11:51:26 AM »
I am a high school student who has long been interested in and involved with robotics and similar projects, and I've been working on building a robot with a car-style two wheel steering, but I've hit a bit of a roadblock. To keep complexity low I'm trying to get away with using either very simple or no suspension, and I cannot think of a great way to mount my motor/rear Axel shaft such that it can survive vibrations without causing damage to my gears or motor.
I am planning on running a 4.5:1 or 5:1 gear ratio, pinion and spur directly meshed together with the spur on my rear Axel (a 3/8" thick solid steel shaft) and my motor is a pretty powerful 545 can from Banebots. It will be driving my robot really fast and with considerable torque, theoretically my robot should be able to get over 30mph easily. I have access to hose clamps, HDPE sheets that are 3/8" thick, some 1/4" Lexand, 1/8" plexiglass, and a lot of aluminum L brackets, flat bars, and square tubes. Any suggestions would be greatly appreciated!
I have only hand operated power tools to work with BTW, but I can easily cut plastic and aluminum with my dremel and I have a nice high torque drill, plus soldering equipment and a blowtorch. I have access to plenty of fasteners and misc. materials as well, and can purchase anything cheap and readily available online/in hobby or hardware stores.
So far my goal is roughly to create a 1:10 scale RC car and then add some autonomy through an Arduino Mega. I have all my electronics already purchased and have done my homework to figure out speed, acceleration, and approximate weight for my robot. Ultimately it'll be about 18-22" long and about 12" wide, under 3.5kg/7lbs. I have some Banebots 3-7/8" wheels for the back. I have some skateboard wheels from an old project I plan to use for the front wheels since they have bearings mounted already, but I have another pair of the same Banebots wheels in case that might work better once I test it out in real-life conditions.

TL;DR: I need a super simple way to make a motor and gear system survive vibrating while spinning at high speeds, and other tips/suggestions.
75
Software / Re: 50 dollar robot building error
« Last post by Zevoo on December 01, 2014, 10:21:07 AM »
I tried it before and it didnt seem to work but Ill try again and see if it works....

how can I change the location of where the atmel studio is suppose to be looking for the files though?
76
Software / Re: 50 dollar robot building error
« Last post by jkerns on December 01, 2014, 10:13:21 AM »
It looks like it is not finding files where it expects to find them - mismatch between where they got unzipped and where Atmel Studio is looking? Perhaps you could keep adding the .c and .h files it can't find to your project until it has found them all. Or, sort out where it is looking and where the files are actually located.
77
Software / Re: 50 dollar robot building error
« Last post by Zevoo on December 01, 2014, 09:01:45 AM »
I'm just following the fifty dollar robot tutorial which tells me to include the makefile. When I remove the makefile this is what I get:
78
Software / Re: 50 dollar robot building error
« Last post by jkerns on November 30, 2014, 06:56:29 PM »

3. Set the external make file as 'makefile'

Is it necessary to use an external makefile? Usually Atmel Studio builds just fine without playing around with makefiles. Are you following instructions for Atmel Studio or some other build environment?
79
Software / Re: 50 dollar robot building error
« Last post by Webbot on November 30, 2014, 05:55:38 PM »
Looks like some kind of config error - last image contains a 'path not found' error.
Hard to comment further as I don't use Atmel Studio
80
Electronics / Accelerometer/gyro data to serial port using bluetooth.
« Last post by Seras on November 30, 2014, 05:15:44 PM »
Hi I am looking for a way to send accelerometer/gyro data via Bluetooth. My thoughts so far are to use an RFduino and something along the lines of a MPU-6050 but since I am on a limited size factor (somewhere along the lines of the outermost bit of a thumb) I do not want to use breakout boards. Here is an example of what I want to achieve but without using the breakout boards (or at least get the finished product really tiny):

(Any help on the matter would mean a lot to me, thanks in advance  ;D)
I still haven't bought any electronics so I am still not limited to anything so if you have a better idea please tell me.
/Seras
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