Speed 900s

[Eventorizon]

Re: Speed 900s

Would it be overkill to use 2 of these motor to drive a disc, I have more than enough weight spare. And what ratio you typically use with these motors?

[psycho_fling]

Re: Speed 900s

its not un heard of

not sure on ratio

[Anttazz]

Re: Speed 900s

Drumroll used 2 on its drum originally I think. Also, I think Inertia uses 2 of them to run its disc, so not a bad example to copy

[Eventorizon]

Re: Speed 900s

2 it is then, with a combined torque of 2.2Nm it should easily spin a 2Kg disk up to some serious speeds!

[teamshock]

Re: Speed 900s

Yep, I use 2 speed 900's on Inertia XL to power the disc which weighs 2kg. Currently on a 4:1 ratio but I am thinking of changing it to 3:1

Seems to work pretty well

http://www.youtube.com/watch?v=Vas5GiwSXLQ

[Eventorizon]

Re: Speed 900s

Ah thats Inertia! So 2 900's it is then. Is the 4:1, if the motor does 6000 RPM the disc is doing 1500 RPM?

[Ellis]

Re: Speed 900s

If the motor is at 12v, yes. If over volted, that number will increase.

[Bodge Job]

Re: Speed 900s

Does any one know the rpm of a speed 900 on 24 volts?

[Bodge Job]

Re: Speed 900s

Would it be double with 13,000 rpm? And thanks for the help so fat

[Ellis]

Re: Speed 900s

If you double the voltage, you double the rpm and quadruple the torque. Or so I believe.

[RogueTwoRobots]

Re: Speed 900s

A Speed 900 at 12V gives 6500rpm unladen, so yes at 24V it will be 13,000rpm.
Using two motors won't increase the destructive capability of the spinning weapon (how much energy is stored/dispersed) but it certainly does help with spin-up time and also with keeping the disc or drum turning during/after impacts.

[maddox10]

Re: Speed 900s

I made a dual Speed 900 drive for a disk a few years ago.
Ended up in Prodigy Evo.

Was rather impressive at 24V.

[Bodge Job]

Re: Speed 900s

Ok thanks every one for your help, I think I know what I'm doing now

[Bodge Job]

Re: Speed 900s

Are these the speed 900 replicas? If so, has any one got any experience with them? Are they as powerful and as fast as they say? And can they be over volted? Thanks, as this may help up, cheapen your new robot... Or should I stick with the good old reliable proper speed 900s? And any recommend any good speed controlers for it? A know the scorpion xxl would work, and the demention engineering duke thingy (scientific words I know) but is a cheaper alternative? Like a good quality controler? I think electronises are like £60? And I think I saw the scorpions for that price? Thanks

[Bodge Job]

Re: Speed 900s

http://wap.ebay.co.uk/Pages/ViewItem.as ... rect%3Doff woops i forgot the link! :/