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This project has evolved some , the basic rundown is I'm modding two Omnibots , one a regular the other a larger 2000 model. I will have two ezb kits , rad base idea was thrown out because of so much noise but could go back on the table if the omnibot drivetrain is too weak to pull it.
By jstarne1
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ok they will be on the way soon
PROBLEM WITH THE PINONS not the same as ones in omnibot 2000 gear box,ones used it 9 teeth and ones on the motors are 12 teeth,servocity sells them for $2.50 plus shipping ,there where i got mine and so far i am still using them
so speed will be different a lot faster,need to use a slower pwm or ? using 2 stock motors will double the torque ,but also double the current with roomba motors you get about the same or more,because of the gear ratio in the omnibot and gear ratio is alot lot more then used in the roomba pushing 50 lbs so i am thinking alot more then 100lb payload carry with half or less the current of 2 stock motors on each side if your idea doesnt work can always rework again
on the roomba wheels motors i do have plenty of them ,one in the photos info i got was 35 lb plus for each one ,so 4 of them over 140 lb they go quick on ebay when i post them for $20 can do it cheaper,onother good idea why a lot of robot makes use them is because of the optical feedback sensor,need to make a circuit to convert pulses to analog voltage (with is a major design i am working on)
The opinions we are reffering to Fred are 20mm long 2mm shaft 19 teeth
If I had two more opinions I have the option two have two more motors sharing my load if one motor is not enough.
i think they are and called pinion not opinions LOL i think it was the rad 2.0 that uses 12 teeth so what do you need for me to send ,2 pinions and 4 side brushes or anything else way the gear ratio works to get more torque and less speed is to use a very small pinion gear and large gear on the wheel lets say 4-1 ratio so use a 12 teeth pinion and 48 teeth gear on the output and speed is divided by 4 and torque is multiply by 4
so on your omnibot gear box you should use less teeth to get higher torque plus using 2 motors also you get double speed,so at about 9 or 10 teeth you will get much much higher torque and speed will be about the same on using you setup using 2 motors you get double the torque and double the speed BUT using a 9 teeth pinion gear you get 4 times the torque and same speed as before
Lol , are the side brushes normal dc motors? The brushes on the right hand side would need to have their rotation reversed so the flip dirt the correct direction. Also basic question.... Can I replace the 2 brush head with a 5 brush like in the previous picture?
yes vonly a screw holds it on,ebay has the brushes cheap and the motors are common dc motors and has a gear box
Ok great info , thankyou
also its a 3 wire brush on that link from irobot
ebay does sell a 5 wire brush that can be put on it on this one i dont see the motor,on the other one you can see it,top of itanother point you may not know each motor draws about 400 ma so 4 is 2 amps almost and i guess your vacuum will be on a long time to get its job done i can test them at home thursday,since i have a very good digital current/voltage power supply very high accuracy adjustable