User:Vonzere4071/enes100/WheelChair-p3

Week0 Activities

 * 1) 3G Storm Series wheelchair Owner’s Operator and Maintenance Manual....i will study this and analyze the motors part for any information thatwill be helpful and i will also watch this Check out the video here.

Write problem/project Goal
The overall goal is to make the wheel chair move around autonomously.I will make the wheel chair have variable speeds.

My First Task
i went to the previous teams page and saw what they worked on.."We want to fix the battery charging issues that the last team had and control the wheelchair with an Arduino. We also need to document all the different parts of the wheelchair (motors, shield, and wires) with any available official documentation and pictures. Finally, we need to find a way to charge the battery of the wheelchair."...i will work on the motors of the wheel chair and get them to work having various speeds..i will attempt to use an arduino if required i will use a motor shield..

Week1 Activities
I will repeat the other teams successes in making the motor move...i will learn enough about the motors and post a tutorial

Summary of actual work over first weekend
i watched this video..http://www.youtube.com/watch?v=p8_vGv_03Ao..it shows how i can make the motors spin back and forth..also it explains what the 4 connectors on the motor do...the red and black go directly to the motor as power and ground respectively...the four white..or 4 black on my motor are for a break.

Week1 Narrative
i succesfully repeated what the other team did...i made the wheel chairs motor spin i simply connecet the ground and power of the chair to the battery.

these are the batteries that made the motor spin...they are the only ones currently working []

My Second Task
of all the joy sticks we were given i will find one that works for our wheel chair.

Summary of actual work over second weekend
i worked on the only motor that works i found that it works in a very simple way u just give it power and it moves ...i also got the part numbers of the two motors so that the next group to work on this wouldnt have to bother looking for this info also if we cant fix the broken motor this info will be useful in that we will be able to get the exact motor..//

Week2 Narrative
i went to the other teams page and found some useful information..http://www.invacare.com/parts/assembly/12005.pdf//..i also found how the wheel chairs motor can be taken apart heres a sketch of how things come apart..* Motor and Gearbox Assembly Reference Chart
 * 4-Pole Motor and Gearboxes After 8/31/98
 * Motor/Gearbox Assembly Reference Chart//this will be useful because one of our motors is not working and we need to fix it and we can only do that if we go inside the motor and figure out what the problem is

http://forums.trossenrobotics.com/showthread.php?4815-24v-Wheelchair-Motor-Wiring-Question...-HELP!!// this link goes to a page of a person who was also working with the same motors and it has pictures of how the motors look inside and also it shows hot take the motor apart......now i know what to expect if i open up the motor to look for problems ill just compare the broken motors insides with these motors and see the difference which will be the problem..

I found the info in this link helpful we might choose to do what this person did.//http://www.narobo.com/robots/ButlerRobot/MotorControl.html//

My Third task
i will continue to find useful info on the motors and how we can work on them...

Summary of actual work over third weekend
i found out that Wheel chair motors are made to last so 36V will probably work fine for an extended period of time. You can probably get away with up to 48V but really depends on motor. Other main thing to consider is the brushes too much voltage/current and you may just destroy them.As with anything its designed to run on 24V so you should run it on that. 36V+ will probably work and give you 2.25 times the power but it may if you significantly shorten the life span of the motor or destroy it.



Week3 Narrative
//http://vimeo.com/27829577// this is how our wheel chair will have variable speeds.

//http://www.hvlabs.com/hbridge.html//this shows how the DC motor can be controlled this is very useful if the next team wants to do complicated engineering work on the motors





this explains what a relay is and how it works//http://www.howstuffworks.com/relay1.htm//..

this is an overall tutorial on motor control //http://www.societyofrobots.com/member_tutorials/node/142//..

this elaborately explains how the motor goes forward and reverse //http://www.dprg.org/tutorials/1998-04a///...

i can get a relay here //http://www.allelectronics.com/make-a-store/item/RLY-351/12V-SPDT-30-AMP-AUTOMOTIVE-RELAY/-/1.html//

i can get the socket here //http://www.allelectronics.com/make-a-store/item/SRLY-4/DUAL-SOCKET-FOR-AUTO-RELAY/-/1.html//





this shows the numerical facts of the motor we are working on.

My Fourth task
i will continue to get as much info on the wheels before i work on them....

Summary of actual work over fourth weekend
i found out that the control circuitry and components by design will lock the chair if the power fails, or if the control circuitry seems glitchy etc. These are all standard safety precautions in electric wheel chairs. When the power goes out, you don't want grandma zipping down the hill backwards at 100 mph.

there are electric brakes which are designed to stop the wheels when 24V is not applied. circuitry would send 24 volts to the brakes releasing them only when conditions are "just right"

This as a next step for the next team will be useful it goes through removing the breaks of the wheel chair//http://www.youtube.com/watch?v=aZ-gW5uSCXo//



Week4 Narrative
i looked on what the breaks on the motor actually do and found out that they are a safety feature

Complete Team Page
Wheelchair Team Page