Spinner Weapon Motor Discussion

[aliboy]

Spinner Weapon Motor Discussion

Hi another question about weapon activating with the electronize 2 way switcher , what sort of relay would i need for my weapon , it runs off 24v so im guessing ill need a 24v relay , but what type ?
Also if somebody could draw me up a quick diagram of how i would wire the whole thing up aswell that would be great .

[aliboy]

Spinner Weapon Motor Discussion

I have updated my design for my spinner , It is basically going to be like an old version of little spinner ,
I have recieved and old angle grinder gear box that i am going to modify to attach a gear that has the same pitch as the ones found on drill motors .
I have also bought 2 johnson motors to power the spinner and going to try and find some old pinion gear on some small motors .
I also got the elctronize 2 way switcher for the 2 johnson motors . The hole design is going to be an undercutter of some kind with a 4mm hardox bar with 8 mm hardox teeth on the ends
Any comments on the design would be great .

[big_nipper]

Spinner Weapon Motor Discussion

We used 12V relays at 24V in little spinner 2 (version 1), mainly becsue we had some spare but didnt have any problems. Actually one of these is now in Dizzy Tilly and thats working on a mag. Not bad for a relay that says its rated for 12V 10A. Little Spinner used a 75W pancake motor and belt drive.

[cavecrusher]

Spinner Weapon Motor Discussion

i still have some 12v 80amp relays, that arnt bigger or heavier than the relays used to modify the 30 amp electronizes.
its the HG4185C from willow technologies, make current is 240 amps, break 80 amps. weight about 35 gr

[aliboy]

Spinner Weapon Motor Discussion

I have some questions about pinion gear
What is the Module of a normal pinion gear on a drill motor ?
What is the pitch of the gear on a drill motor ?

[jhq]

Spinner Weapon Motor Discussion

What is the Module of a normal pinion gear on a drill motor ?

I think it is 0.75.

[aliboy]

Spinner Weapon Motor Discussion

Thanks JH-Q i just figured that pitch and Module were the same thing
Can somebody please post or draw up a schematic diagram of how i would connect a 12 vlt relay to an electronize 2 way switch to turn a motor on or off

[john_frizell]

Spinner Weapon Motor Discussion

To make a motor run in forward or reverse you want a pair of SPDT (sometimes called SPCO) relays connected in an H bridge. Maplin does a good 30 amp one for £1.49. The electronize switch turns one relay coil on for forward, the other on for reverse. For each relay pair connect your motor across the common terminals, connect your battery positive to NC of both relays and your negative to NO of both relays. If this is hard to follow then wire up the relays, without the electronise switch, and turn the relay coils on and off with an ordinary switch until you are confident about how it works.

[aliboy]

Spinner Weapon Motor Discussion

Thank you John i understand how to wire it up now thanks
I have a question about the mod size of a gear , JH-Q told me that the mod of a 9 tooth gear you find on the end of the drill motor is 0.75 , i cant find any gears with a mod of 0.75 , what do i do ?
This is my planned weapon setup
http://img521.imageshack.us/img521/4462/wepsutup8av.jpghttp://img521.imageshack.us/img521/4462/wepsutup8av.jpg
Am i right in thinking that the total ration for the setup is 9:1 ?
What do people think of this setup ?

[jamesb]

Spinner Weapon Motor Discussion

looks like it will work ok, i would strip the angle grinder gearbox, degrease it, and replace with a light oil like wd40. thats just me though, minimizing the friction losses

[aliboy]

Spinner Weapon Motor Discussion

Yeah ill try and mill some of the angles down , some of the screw heads holding the gearbox together are stripped so ill have to drill into the old stripped gears and buy new screws the match the thread size . Thanks for the advice James

[typhoon_driver]

Spinner Weapon Motor Discussion

Alister if the mod is indeed 0.75 then as far as i can see, you have 2 options.

1) Chuck the 0.75 gears and buy some new ones
2) Get a drill gearbox, tear it open and see if there is anything usuable in it.

Yes the total ratio will be 9:1

I think its a nice setup as long as everything is aligned properly and secured well in place. You will just have to make sure that both motors are spinning in the right direction! Could get messy otherwise.

[aliboy]

Spinner Weapon Motor Discussion

Thanks for the advice gary , i have a knackerd gearbox some where , see if there is any usable gears inside it , BTW is your feather ready to go yet ? My robot just has to get some Nimh in it and wired and its ready .

[typhoon_driver]

Spinner Weapon Motor Discussion

Its far from finished. I have to put the new 12v golds in, put my new pancake motor for the disc and buy some new nicads.

[ewan]

Spinner Weapon Motor Discussion

Hey Alistair, just thought of something. Why not see if you can get some metal meccano gears of the right size. Ok, they may be brass and might well strip, but its worth a shot.

http://secure.meccanoshop.co.uk/index.html?http%3A//secure.meccanoshop.co.uk/Spare_Parts.html&CatalogBodyhttp://secure.meccanoshop.co.uk/inde...shop.co.uk/Spa re_Parts.html&CatalogBody