spinner bar ratio

[typhoon_driver]

Re: spinner bar ratio

7.4kj is a nice figure for a spinner. Boner has around 700joules of energy and does fine.

Remember though, you have to design the rest of the bot to survive the impacts.

Design wise it depends entirely on what you have in mind.

O and i would scrap the cross design and just go for a solid flat bar.

[mattsdragons]

Re: spinner bar ratio

What kind of relay or ESC would you use for a motor like a car fan one?

[dragonmaster_1]

Re: spinner bar ratio

Not sure Probably 2 grub screws through the collar of the pulley. Make 2mall indentations in the motor shaft for the grub screws to locate in to.
I use chain drive on DS so the sprockets are welded on.

[dragonmaster_1]

Re: spinner bar ratio

On DS i use a toggle switch (on off) activated by a servo. Been using that for 6 years never had a problem with it never had to replace it.

[Danjr1]

Re: spinner bar ratio

7.4kj is a nice figure for a spinner. Boner has around 700joules of energy and does fine.

Remember though, you have to design the rest of the bot to survive the impacts.

Design wise it depends entirely on what you have in mind.

O and i would scrap the cross design and just go for a solid flat bar.

the solid flat bar is probably a good call! costs etc

[typhoon_driver]

Re: spinner bar ratio

Nothing to do with costs. Purely based on the mechanics of a collision and transferring as much energy as possible.

I'd recommend a solid state relay activated by an RC relay

[PJ-27]

Re: spinner bar ratio

A car fan motor won't like 24v you say? Hhhhhmmmm........

[Danjr1]

Re: spinner bar ratio

how would a change of material from hardox to say stainless steel work? be a lot easier to source

[dragonmaster_1]

Re: spinner bar ratio

Who said

[jonny]

Re: spinner bar ratio

from my experience car fan motors are fine on 24v

[typhoon_driver]

Re: spinner bar ratio

i did. I always follow the rule of thumb of 1.5 times for a safe over volt on a motor without running it to ruin too quickly. If they can take it then by all means.

[maddox10]

Re: spinner bar ratio

how would a change of material from hardox to say stainless steel work? be a lot easier to source

Not well, stainless has entierly different capacities compared to hardox. But that depends on kind of stainless tough.

For money, Hardox is the cheaper stuff.
Sourcing it. I would send an Email to SSAB, to ask who's selling the stuff around your location. From that you can select compagnies that work with Hardox, and then search for offcuts. Or even a made to fit spinner bar.

[Danjr1]

Re: spinner bar ratio

Ok, thanks. Who's SSAB?

[typhoon_driver]

Re: spinner bar ratio

google them

[PJ-27]

Re: spinner bar ratio

Vauxhalls and Opels also use Bosch motors.