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1  Using Arduino / Project Guidance / E Shifter kart on: January 22, 2014, 07:49:16 pm
I'm in the planning phase of an electric go kart featuring a 2 motor, 2 speed dog shifter and I have the following questions:

How can I make it switch between forward and reverse?

Since I'm using a servo to shift gears (pneumatics aren't beneficial), how can I have it shift? Paddle shifters on the steering wheel??
2  Topics / Robotics / Gearbox shifting on: September 24, 2013, 07:16:40 pm
My go kart's 2-speed transmission can shift with either a pneumatics system, or a servo. Using either I would like to have paddle shifters (like a formula 1 car) and I was hoping someone could give some insight on which is better for physically shifting, and how to build the paddles + code for them (Using RobotOpen protocol https://robotopen.readthedocs.org/en/latest/ )
3  Using Arduino / Motors, Mechanics, and Power / Re: Motor + controller advice on: August 14, 2013, 05:56:08 pm
So that excel spread sheet says with a 5.06:1 ratio (chain drive) and 10 inch wheels i can do near 20 miles an hour?
4  Using Arduino / Motors, Mechanics, and Power / Re: Motor + controller advice on: August 14, 2013, 04:30:29 pm
I have 2 12v 20Ah batteries right now. Will that work?? plus I noticed the controller has 2 outputs with 120A surge current on each output, the motor needs two sets of terminals... so I just need this sabertooth (http://www.robotmarketplace.com/products/0-SABERTOOTH2X60.html) and the motor and I'm golden for a decent power kart???
5  Using Arduino / Motors, Mechanics, and Power / Re: Motor + controller advice on: August 14, 2013, 02:44:29 pm
Any amount of time above 15 minutes ideally, and I'd like to spend as little as possible smiley-razz
6  Using Arduino / Motors, Mechanics, and Power / Re: Motor + controller advice on: August 14, 2013, 02:16:13 pm
The website says the sabertooth has over current protection and can move a 1,000 pound machine. And its 80 pounds dry excluding batteries and driver. Total is probably pushing 300 since I'm 140. Batteries and controller suggestions anyone???
7  Using Arduino / Motors, Mechanics, and Power / Re: Motor + controller advice on: August 14, 2013, 10:16:51 am
Nope, this thing is gonna be made purely for fun, but on gravel/dirt. Dimension Engineering's top controller Sabertooth 2x60, with a peak 120A output and 60 continuous. Is that enough for my motor?
8  Using Arduino / Motors, Mechanics, and Power / Re: Motor + controller advice on: August 13, 2013, 11:01:51 pm
Alright any idea where I can find such a controller??? Robot marketplace recommends a IFI Victor 885 but they don't make those anymore...

also since I have a 10 inch wheel diameter and a 5.06:1 gear reduction what will my top speed be??
9  Using Arduino / Motors, Mechanics, and Power / Motor + controller advice on: August 13, 2013, 03:52:22 pm
Im torn between these motors:
AmpFlow A28-400 - http://www.robotmarketplace.com/products/0-A28-400.html

AmpFlow A40-300 - http://www.robotmarketplace.com/products/0-A40-300.html

AmpFlow E30-400 - http://www.robotmarketplace.com/products/0-E30-400.html

AmpFlow A28-150 - http://www.robotmarketplace.com/products/0-A28-150.html

The motor will drive a 80 pound go kart + 140 pound driver and I would like high acceleration rate.
Along with this I need advice on a controller without breaking the bank. Any advice is appreciated! smiley
10  Using Arduino / Project Guidance / Re: Motor advice on: August 04, 2013, 11:33:25 am
Im thinking 20 mph ideally as a benchmark. and it could be quick so the wheels spin smiley-grin its on gravel so that doesn't take much smiley-razz suggestions? and its carrying about 220 pounds
11  Using Arduino / Project Guidance / Motor advice on: August 04, 2013, 10:45:57 am
For making an electric go kart, are these good motors? http://www.robotmarketplace.com/products/0-E30-400.html

I'm hoping to make this thing mildly quick but not horribly expensive.
12  Using Arduino / Project Guidance / Re: Slide potentiometer to motor controllers on: July 30, 2013, 08:02:43 am
Both Talons and Jaguars operate on a PWM signal and are driven just like servos. For both controllers its the following
1000 microseconds = full reverse
1500 = neutral
 2000 = full forward
I need my throttle to be sending 1500 when the value is 0 and be writing 2000 when the value is 1023
13  Using Arduino / Project Guidance / Re: Slide potentiometer to motor controllers on: July 30, 2013, 12:12:05 am
No continuous rotation servos here. Using 2 Cross the Road Electronics Talons and one TI Jaguar speed controller. The signal these get from the slide needs some adjustment smiley-razz suggestions??
14  Using Arduino / Project Guidance / Re: Slide potentiometer to motor controllers on: July 29, 2013, 09:13:27 pm
Alright codes working, just found one major flaw, at 0% throttle the motors run full reverse :p and at the 1023 max value its 85% in reverse
15  Using Arduino / Project Guidance / Re: Slide potentiometer to motor controllers on: July 28, 2013, 11:46:14 pm
I'll give that a shot in the morning and let you know the results
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