Is it possible to run 8 motors off one speed controller.
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Is it possible to run 8 motors off one speed controller.
Depends on power of each motor.
Normaly I would say that a 4QD NCC70 24V easely can handle 8 speed 720s 2 in serie 4 parallel.
But if you try to control 2 Bosch 750s on the same 4QD , youll lose a lot of potential power delivered by these motors. If the speedo doesnt fry.
In theory, a group of motors looks like 1 big motor to the speedo. But if the back EMF and total power drawn exceeds the capacity of the speedo, youll be letting out the magic smoke.
Im using NPC-02246 motors
Hmmm, those motors are 1/3th the power of a Bosch 750, with a pricetag 1/3th of the Bosch 750.
You could join 3 of those on 1 speedo and get the same power as 1 Bosch 750 on the same speedo, but for 6.5kg, wheras the Bosch 750GPA weigths 3.8 kg.
so can i run 8
Ben ...For your first bot Id suggest building a straight forward 2 motor two wheel drive bot.
Much cheaper and easier to implement ...perhaps two of the popular NPC-T64 Motors.
http://www.robotmarketplace.com/products/NPC-T64.htmlhttp://www.robotmarketplace.com/products/NPC-T64.html and a Robot Solutions speed controller either this http://www.robotmarketplace.com/products/RS-RS80D.htmlhttp://www.robotmarketplace.com/products/RS-RS80D.html or its bigger brother http://www.robotmarketplace.com/products/RS-RS160D.htmlhttp://www.robotmarketplace.com/products/RS-RS160D.html.
Expensive hobby bot building.
My choice Woody
Indeed it is :)
All info is offered for acceptance or rejection.
So ...In answer to your question can I run 8 ...YES
Is it a good idea ...I dont think so.
(Message edited by woody on June 25, 2008)
I concur Woody.
Team RCC uses the Sidewinder as normal heavyweight speedo. This speedo does a great job regulating 24-36V- 80A per side.
But 4 of the NPC 02246 motors on 1 channel. These will be limited to 80 amps total.
Meaning each, if their resistance is equal, will see 20 amps each, at best. Thats not a big load on those motors.
(I would use the way lighter Speed 900s then, better amp/torque/weight)
Oh well, if you want to waste weight on extra motors, no problem for me, just means another victim.
Right and what robot is yours
i will buy 8 speed 900s then will that be ok
on 1 speedo or 2