Where to source robot wheels

[catharsis]

Hi, all... I need help deciding the wheels for my mobot...

I initially planned to attach my wheels directly to the shaft of the motor (6V DC MABUCHI motor, small size lang) but I realized there won't be enough space left to insert my encoders in between..
I tried to "extend" the shaft by drilling a hole into chopsticks then sticking it in the shaft... but it's not really good with all the wiggling while the motor is running... I need the encoders for my PID. I am also using differential motors so if I'm gonna buy a new motor, I gave to buy 2 pcs.

I've been to e-gizmo, however their wheels are too thick... I've also been to Lil's and I saw a 2-pc "mags" that is sized just right, but it's width is also thick, although may as well insert it backwards in my motor...

This is my first time building a mobot, so i need help with sourcing or alternatives etc...

Right now, I'm still trying to make the chopsticks shaft work.. but i am also thinking of:
1.) buying a geared motor and put a longer shaft (will my PID calculations change because of having gears?)
2.) buying a motor with encoder (last resort)
3.) buying the 345++ peso 24V motor that has a reasonable shaft length and has a wedge and look for a large diameter wheel (nahihirapan din ako mag source ng wheels with reasonable diameter)
4.) Putting gears into my current motor (which I still have no idea on how to do it...)
5.) Some other options I am not aware of....

what do you think guys? need some advice.. advise.. here Thank you..

[bravokilo]

maglagay ka ng pix and give dimensions.  maybe we can help make suggestions.

BK 0922 281 0680

[motion55]

@TS

I assume this is a school project. How much of the mobot are you allowed to buy? Anung restrictions on the type of motors that you can use? May mga brushless DC motor for RC cars.  So there are pre-built cars with these motors. I assume you need PID for speed control. These BLDC motors come with electronic speed controls.

[zrehtiek/keitherz]

try teflon tape. kapalan mo lang. instead of the sticks.

[catharsis]

Sirs, Sorry for the late reply.. I was busy going around my area searching for wheels...

for this project, I was leaning towards "economy" robot... reusing junk materials as much as possible... mejo nag alangan lang ako sa gulong because I have no idea how to fit the wheels, encoders and shaft altogether, properly...

As much as possible I am avoiding buying servos, though I learned that having servo motors give you more choices with tires and the flexibility of having encoders with little modifications...

I ended up making a wheel of my own, which the idea i got from the net. my wheel is made up of two CD's glued together.. haha... the CD is connected to a bearing which in turn is also connected to the "shaft". The shaft is a thick BOLT screw... the bearing is in between two nuts which creates a "lock"...

the wheels are then connected to the motor by means of a rubber band hahaha.. so it's a rubber-band pulley type drivetrain... I just reinforced the motor shaft with heat shrink to improve the friction between the motor and the wheels...

I 'm excited to finish this project and hopefully, I am still sane by the time I get into the trial and error phase for the PID algorithm...

Hats off to this guy where I got the idea from: ("put www here").instructables.com/id/Linefollower-robot-from-Arduino-and-junk/

Kabaliw para gumawa ng robot, but I liked the challenge.. lalu na first robot and 8 days lang ang palugit

I'll try to upload pics of it when it's done...

Thank you very much sa mga inputs sir
I would love to hear other suggestion too regarding wheels with encoders and some alternatives for this

[catharsis]

@motion55
My mabuchi motor has this kind of terminal... I did PWM to control the speed of the motor using a potentiometer... I'm just curious baka I can also read the speed, baka built in na pala ang encoder function... parang may circuitry yata kasi sa loob by the looks of it...

Do you have any encounters with this motor? what do you think?
("put http here")://lightbox-photos.s3.amazonaws.com/photos/00ce0866696d312cb97f6546250b3e3a_311657_lrg.jpg

[motion55]

baka built in na pala ang encoder function... parang may circuitry yata kasi sa loob by the looks of it...

No, I haven't encountered this particular motor. However, if it does have complicated circuitry inside then maybe it's a brushless DC motor. The BLDC has hall-effect switches to detect the position of the rotor and electronically switch the armature windings. These hall-effect sensors are like the encoder and can be used to detect the speed as well as position of the rotor. Hall-effect sensors are used to detect the speed of fans used in PC motherboards. If you can tap to these sensors, then you won't need to add encoders.

[bravokilo]

when you are ready for bigger geared motors, let me know.
I have car window raiser mtors, 12V DC.P500 isa.

I also have about 10 pieces 6V motors na may belt pulley na sa shaft. P100 isa. itong parang size ng Mabuchi mo Catharsis.

BK09222810680