what about motor and reductor chosing? - Electronic Circuits Projects Diagrams Free

patroclus · 4th March 2004, 09:57 AM

For a small two-wheels first robot, which DC motor should I get?? The typical DC motor I've always seen is quite big and powerfull, and also takes 3V@330mA or 6@450mA which is a lot.

also, for reduction, how could I build myself one?
the ones they sell are quite expensive

thnks

Someone Electro · 4th March 2004, 01:30 PM

Well i got a lego car moving whith one 80 mA motor at 7.5 volts.He was a quite heawy felow. I have a motor thet golps 2 A at 6 V!

Whith no reductor the thing wod go nice nad fast whith two 100 mA motors at 9V (Whith two 4.5 baterys)

falleafd · 4th March 2004, 06:00 PM

What is your real problem? The weight of power supply? driver or the motor? Or you meant the total weight of your robot? Or you care about the dimensions?

patroclus · 4th March 2004, 11:24 PM

My main aim is low power consumition, as the robot is small and light. But also cost. I know that servos maybe best solution, but they are expensive.

Someone Electro · 5th March 2004, 05:47 AM

If you make it light enugh 100 mA motor at 3V shod do it.But i thing yul have to runit from button baterys.Beter rechargeble becose buton baterys can get dicrharged fast whith a motor.I have some Ni-HM buton baterys for this purpose 3.6V 250 mAh

falleafd · 5th March 2004, 07:34 AM

Do you know a new Japanese battery? It's AA size, but it's so strong, only 3USD each.

If you use a 6V motor, you also can use 3 V supply, it still works. I cannot get the strongest torque of the motor, but I'm sure it will works. As you use PWM for 6V motor, at 50% duty cycle, that is, you seem to apply 3V to the motor. Yeah, there are some differences, but in a small light application (not a micro application) dont care muchie about it. It works.

If your application is a microbot, I think you have to use servo or RC motor. RC motor, in fact, it's used for remote controling, but if you use RC, it's so tiny.

bmcculla · 6th March 2004, 02:09 AM

Look for Cell phone vibrator motors. They are tiny.

http://www.allelectronics.com/ part number DCM-166 also might be what you're looking for.

Brent

patroclus · 6th March 2004, 10:09 PM

thanks for the tips

I already thought about mobile vibration motor, it may be good idea for many applications.

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4th March 2004, 09:57 AM	(permalink)
patroclus	what about motor and reductor chosing? For a small two-wheels first robot, which DC motor should I get?? The typical DC motor I've always seen is quite big and powerfull, and also takes 3V@330mA or 6@450mA which is a lot. also, for reduction, how could I build myself one? the ones they sell are quite expensive thnks

4th March 2004, 01:30 PM	(permalink)
Someone Electro	Well i got a lego car moving whith one 80 mA motor at 7.5 volts.He was a quite heawy felow. I have a motor thet golps 2 A at 6 V! Whith no reductor the thing wod go nice nad fast whith two 100 mA motors at 9V (Whith two 4.5 baterys) __________________ Il give you shocking experience.

4th March 2004, 06:00 PM	(permalink)
falleafd	What is your real problem? The weight of power supply? driver or the motor? Or you meant the total weight of your robot? Or you care about the dimensions? __________________ Falleaf mail@falleaf.net English forums at PIC Vietnam - Vietnamese Electronics forums R&P Trading and Forwarding Co. Ltd. Distributor of Microchip in Vietnam

4th March 2004, 11:24 PM	(permalink)
patroclus	My main aim is low power consumition, as the robot is small and light. But also cost. I know that servos maybe best solution, but they are expensive.

5th March 2004, 05:47 AM	(permalink)
Someone Electro	If you make it light enugh 100 mA motor at 3V shod do it.But i thing yul have to runit from button baterys.Beter rechargeble becose buton baterys can get dicrharged fast whith a motor.I have some Ni-HM buton baterys for this purpose 3.6V 250 mAh __________________ Il give you shocking experience.

5th March 2004, 07:34 AM	(permalink)
falleafd	Do you know a new Japanese battery? It's AA size, but it's so strong, only 3USD each. If you use a 6V motor, you also can use 3 V supply, it still works. I cannot get the strongest torque of the motor, but I'm sure it will works. As you use PWM for 6V motor, at 50% duty cycle, that is, you seem to apply 3V to the motor. Yeah, there are some differences, but in a small light application (not a micro application) dont care muchie about it. It works. If your application is a microbot, I think you have to use servo or RC motor. RC motor, in fact, it's used for remote controling, but if you use RC, it's so tiny. __________________ Falleaf mail@falleaf.net English forums at PIC Vietnam - Vietnamese Electronics forums R&P Trading and Forwarding Co. Ltd. Distributor of Microchip in Vietnam

6th March 2004, 02:09 AM	(permalink)
bmcculla	Look for Cell phone vibrator motors. They are tiny. http://www.allelectronics.com/ part number DCM-166 also might be what you're looking for. Brent

6th March 2004, 10:09 PM	(permalink)
patroclus	thanks for the tips I already thought about mobile vibration motor, it may be good idea for many applications.