# Thread: 45 Deg 2 pole Rotary Switches

1. ## 45 Deg 2 pole Rotary Switches

Hi

Does anyone know where I can get a 2 pole 6 position rotary switch with 45 degree increments?

I want to use Ian Sissons' rotary switch - encoder technique (Genius) for my Autobrake switch.

Regards,
John

2. Same here, anyone know where to get them?

Thanks

Rob

3. ## Simulating Encoders

ah chaps, g'day.....lot of interest in this idea.
but the problem is for your application, the index (45 degrees). the autobrake needs 6 positions (5 spaces). 5 x 45=225 degrees. a two pole is only going to give you 180.
without seeing the switch, you may have to open it up and remove the limit stop. it is possible to then make the switch continuously rotatable. pedro biblioni did it. then by calculating the connections of the A & B group in regard to the common, we could then make the rotary an exact replica of a 2 bit gray encoder. i'm going to have a go at this, writing the reply, i just thought of something.....another day, another brainwave ))
rgds from the land of OZ.... ian

4. Thanks Ian, if anyone can do it you can. I can hear your brain working from here.

See you soon.

John

5. ## 45 degree index rotaries as 'encoders'

ok, lads, this can be done, but, i guess the hard part is finding the 45 degree 2 pole switches. i've just had a rotary in pieces (disassemble it in a plastic bag so you dont loose the high speed ball that's going to want to go live next door). remove the stop limiter and it will become a continuous rotary switch when you reassemble it (that's a bitch).
i've never seen a 45 degree rotary, so my best guess is that a 4 way, 2 pole is what you're looking for. that is going to give you 8 contacts per revolution.
it would have to be a 4 way switch to emulate the 4 switch states (00 01 11 10, twice each revolution).
if you've got an hour free, have a look at the mouser online catalogue. maybe something in there. i also seem to remember seeing 'stacked' rotaries, one on top of another to give you two switches in one. but for the life of me i cant remember where i saw them.
i've got a prototype working using a 6 way 2 pole (i've just missed out a couple of pins). john, i'll show you next time you're here.