CE Project: CE Bot [PART TWO]
This is a discussion on CE Project: CE Bot [PART TWO] within the CE - Labs forums, part of the CE Laboratory category; -----------------------------------------------------------------------------------------
ANNOUNCEMENT : Celab.tk is no longer accessible. Please go directly to:
CE Bot (CE Lab Projects)
for the Project ...
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12th July 2008 12:25 AM #1
CE Project: CE Bot [PART TWO]
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ANNOUNCEMENT: Celab.tk is no longer accessible. Please go directly to:
CE Bot (CE Lab Projects)
for the Project Website, thank you.
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Welcome to Part Two of CE Bot. We will continue the discussions regarding the CE Bot project in this thread.
For previous discussions, please refer to Part One: CE Project: CE Bot
Introduction of CE R3
CE R3(formerly CE Bot) is a project regarding the design and construction of a modular robotic system that can perform various research missions.
Its first mission is that of a semi-autonomous rover. It will consist of an array of sensors, mainly to detect it's surroundings and collect data for processing purposes. Data will be wirelessly transmitted to a host computer located a distance away. The design of rover will be modular to allow for interchangeable components and ease of future upgrades.
For more information on the CE Bot, please refer to the CE Lab website: CE Bot (CE Lab Projects)
Summary of previous discussions
Formulating objectives;
Discussion opens up for defining mission and roles for a robot. A laptop would be utilized as the pre-processing unit and robot controller. It is proposed that the mission will involve data collection and rescue, amongst others. A host computer will be used in the vicinity to act the main processor of data as well as external control. To allow the robot to cater with vast types of applications, the robot will be designed modularly.
Communications;
Discussion leads to methods for processing data and which wireless technology to use to transmit data. 802.11 is proposed.
Chassis/Locomotion;
Various chassis and locomotive options were discussed, such as tracked and wheeled. Some CAD designs have been uploaded for conceptualization of ideas.
Things to discuss in Part Two:- Further Robot Chassis Design
- Sensors
- Simulation software tests
- Python tests
- Wireless connectivity tests
- Draft proposal for funding
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As of August 6th 2008, still needs updating. Will add more things soon.
Last edited by ash; 6th November 2008 at 11:15 AM.
Reason: updating
Keep it simple. Keep it real.
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12th July 2008 12:32 AM #2
Re: CE Project: CE Bot [PART TWO]
Wow. . .a whole new thread! Yay!
Like I said, I'll get on those designs very soon. I will be gone later on today, Saturday, and Sunday, so no designs then. I leave at 4:00 PM my time, which is in 3 hours. Sorry I haven't come up with anything lately. . . I've got artists block. It sucks.
I reject your reality and substitute it with my own. . .
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12th July 2008 05:37 PM #3
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12th July 2008 11:16 PM #4
Re: CE Project: CE Bot [PART TWO]
Just a real quick note before I forget, as we were chatting about the pros & cons of battery vs. gas power supply, how to provide drive for the bot and solar cells to recharge or linking the brakes into alternators to provide electrical charge. Personally I think awd via chain or tracks is best due to simplicity, weight savings. dwd, direct wheel drive can also be achieved though would add to weight. I'll talk more about then later.
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14th July 2008 01:26 AM #5
Re: CE Project: CE Bot [PART TWO]
I reject your reality and substitute it with my own. . .
▌║││║█║▌│║│█║▌█│║▌▌║│││
11 0011 10101 10101 1100 11
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14th July 2008 12:22 PM #6
Re: CE Project: CE Bot [PART TWO]

Originally Posted by
gohm
Just a real quick note before I forget, as we were chatting about the pros & cons of battery vs. gas power supply, how to provide drive for the bot and solar cells to recharge or linking the brakes into alternators to provide electrical charge. Personally I think awd via chain or tracks is best due to simplicity, weight savings. dwd, direct wheel drive can also be achieved though would add to weight. I'll talk more about then later.
Thanks for that, gohm. Looking forward to see more details later! Could you sketch how you'd implement the awd via chain?
Also, I looked into your .89 nitro idea. They are called "Glow Engines", yes? They seem to be pretty cool, hehe. What are their fuel consumption like? Would you require a large fuel tank? Lets say that the rover will operate for around 1 hr. Max speed will be 4-5 km/h. I'm not too sure of the weight.. 20 kg maybe?
Back to using DC motors, here's some plus points to consider:
1- Runs on electricity. Rover will have one common power source to power all subsystems.
2- relatively small size. Can have multiple motors to implement the "direct wheel drive". If one motor fails, the rest can continue running. Thus, redundancy is assured.
3- Easy to swap DC motors depending on how its mounted.. only need to resolder the wire connections.
4- Very accurate control via programming.
5- When rover is stationary, DC motors will not consume any electricity. Its pretty much "power on demand".
Some bad points
1- even small, a collective weight of 4 DC motors might be heavy.
2- Will consume a lot of electricity if rover is going uphill or struggle over terrain.
3- need to expand battery size and/or amount to accommodate motors.

Originally Posted by
KINETIC_JOULES
I'm back guys!
Welcome back! Ok, now get back to work
Last edited by ash; 14th July 2008 at 01:06 PM.
Reason: updating
Keep it simple. Keep it real.
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14th July 2008 06:10 PM #7
Re: CE Project: CE Bot [PART TWO]
https://sites.google.com/a/crazyengi...t/case-studies
Hands down, I am in for building a rover something that is at least a tad-bit in league with any of the described rovers on the Updated Case studies page on celab.tk website (above). These are robo's from NASA or the Department of Defense.
Take your time to read about each of them. And also watch the videos. We will learn something about tracked system or the AWD and also the awesome system of all terrain wheel types. Pretty good.
I might add more to the list soon.
https://sites.google.com/a/crazyengi...t/case-studies
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14th July 2008 06:24 PM #8
Re: CE Project: CE Bot [PART TWO]

Originally Posted by
xheavenlyx
https://sites.google.com/a/crazyengi...t/case-studies Hands down, I am in for building a rover something that is at least a tad-bit in league with any of the described rovers on the Updated Case studies page on celab.tk website (above). These are robo's from NASA or the Department of Defense.
Take your time to read about each of them. And also watch the videos. We will learn something about tracked system or the AWD and also the awesome system of all terrain wheel types. Pretty good.
I might add more to them soon.
https://sites.google.com/a/crazyengi...t/case-studies All of these with the exception of the autonomous drilling bot, are using the chain. I agree with Gohm on the use of either chains or tracks instead of individual motors for each wheel. His idea of 0.89 nitro is also quite good. It is not very bulky, quite powerful for its size, providing good speeds to RC cars in which it is used.
@Ash:- Yes they are called glow engines also as they use glow plugs instead of spark plugs to ignite the fuel. The fuel used is called glow fuel which is either methanol or nitromethane. You can refer this link for more info Glow plug (model engine - Wikipedia, the free encyclopedia)
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14th July 2008 07:32 PM #9
Re: CE Project: CE Bot [PART TWO]
From Wiki Radio-controlled model - Wikipedia, the free encyclopedia:
development of technologies like
brushless motors and
lithium polymer batteries. These allow electric motors to produce much more power rivaling that of fuel-powered engines. It is also relatively simple to increase the
torque of an electric motor at the expense of speed, while it is much less common to do so with a fuel engine, perhaps due to its roughness.
The main reason Glow engines cannot be used is because its practically impossible to control the torque (and speed in large variations). This is possible and efficient in electric motors. Plus we will be running our bots for hours and may also use solar power for longer uses, not 10 or 20 minutes as is possible with a glow engine used in RC cars.
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14th July 2008 07:47 PM #10
Re: CE Project: CE Bot [PART TWO]
good point XhX. It skipped my mind, so Glows are out of question
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