Please help me build my new roaster.

[facedanzr]

Re: Please help me build my new roaster.

I had to join this forum after reading your post. Ive actually got the exact same TO and I started my project with the same goals in mind. That is, compact, portable and cheap. I used an windshield viper engine from the local scrap heap. Im worried about rpm count though. I haven t tried it yet, but Im expecting some greens this Friday, so I guess well see then.

Im looking forward to seeing your progress.

[Remy]

Re: Please help me build my new roaster.

I had to join this forum after reading your post. Ive actually got the exact same TO and I started my project with the same goals in mind. That is, compact, portable and cheap.  I used an windshield viper engine from the local scrap heap. Im worried about rpm count though. I haven t tried it yet, but Im expecting some greens this Friday, so I guess well see then.

Im looking forward to seeing your progress.

Welcome to the forum Dozer!  Im so glad you decided to join. Your pics are music to me eyes  8-) thanks for posting them. Thats a really neat way you have fitted the stirer shaft. Is that a hex socket I see there?? How did you fix that to the shaft? Glued onto bolt head???? Also.. would you mind telling what you have used there for the base... it looks perfect for the job.

EDITED TO ADD: Looking at it again,.. I can see the hex socket is not fitted to a head of a bolt, but to the threaded part... hmm..glued on thread makes good grip to fix well yaaar?

[facedanzr]

Re: Please help me build my new roaster.

Actually, it is fixed to the head. I just pushed the shaft through the socket, like.....reversed..... :-/ I guess Ill just take a picture

I made the base from some chipboard (thats what my dictionary calls it anyway) I found i my garage.

There are some more pictures at:

http://www.homeroasters.org/php/foru...&thread_id=904

edit: just tested it, and it works just fine. Easily roasted 300g to 2nd in 16 mins with 13C external temperature. 500g.....np

[Remy]

Re: Please help me build my new roaster.

Im going down the road in a bit,.. and hopefully pick up a cheap wiper motor from the wreckers. What else will I need to get this motor to work?

12V transformer??? if so, got it.
plugs, wires?

I could drop into DickSmith on the way back home,.. but if I knew exactly what I needed that would help.

[fatboy_1999]

Re: Please help me build my new roaster.

Remy,

I run mine off a 12V car battery charger, so a transformer with +/- connectors should do it.
I found with my motor, if the wires were connected the wrong way, the motor spun the opposite way. Dont know if it causes a problem to the actual motor, but in my situation, it actually unscrews my multi-part rotisserie rod, so I always make sure to connect the wires the correct way.

Brett

[Wine_of_the_Bean]

Re: Please help me build my new roaster.

I use an old PC power supply.

[Remy]

Re: Please help me build my new roaster.

Ok.. here is the shiny wiper motor I just bought for $30 (5 to 10 bucks??,..and the rest phrrt) at the local wreckers, minus the inch of crud of cleaned from it. :. Its a rear wiper motor (hope thats ok to use, is not Ill take a cleaned up motor back) . It is from a Econovan and knowing that its a rear wiper from a work van... it probably never got used whaahahaaa... a tradie would think it whoosy to use a rear wiper would he?? *snort*

Anyway... how do I actually connect this thing to a power supply via the wires sticking out.  Youll need to treat me like a girly girl for this one.   Remember.. I am going for neat/compact with this roaster.  WOTB,..can you explain more about what this old PC power supply is.  I have two (but I think three actually) dead computers here and other power cables with interesting boxes (not the regular transformers,.. these are long things) on them from scanners and printers etc,..that I can rat through.



EDITED TO ADD:  Pic

[22a]

Re: Please help me build my new roaster.

Easiest way to work out how the motor works is to just mess around with a 9v battery (less risk of electrocuting youself). Chances are you just need to connect one terminal to the metal housing of the motor and the other terminal to one of the wires coming out from it (the other wires are probably superfluous). You can change direction of the motor depending on which way around you wire the terminals.

Once you figure out how to wire the motor you can work out the power supply. Plug it in and see if it runs (i.e. does the fan go?). If it doesnt then there might be a switch attached somewhere. I dont have a great working knowledge of PSUs so I dont really know how to wire a switch in without seeing what youre working with. Once you get the PSU running you just need to snip one of these:



Take the red wire and the black one right beside it, wire them up to the motor, and Roberts your mothers brother. Also, the standard warnings about working with electrics. Dont have it plugged in while youre working with it. Ive taken shocks from PSUs and theyre not that fun.

[fatboy_1999]

Re: Please help me build my new roaster.

Remy,
Cant see any pic of your motor.

How many wires are coming out of it? Hopefully just 2.
Usually a black and another.
Black = Neg
Other = Pos

Connect with power off. Stand back, switch on and see if motor spins.

EDIT: OK. See it now.

2 choices I reckon.
1: Get to somewhere that sells electrical hobby stuff like Tandy or Dick Smith and you can buy the reciprocal plug that would fit the one on the motor. Then connect your wires from 12v transformer to the slots in the plug, plug it in and see how it goes.
2. Snip the white plug off and work with the bare wires. Need to be careful that they dont touch when the juice is on as they will short.

Do you have aligator clips or similar on the 12v transformer?

[Remy]

Re: Please help me build my new roaster.

Thanks guys,..

Ok.. sorry.. forgot to add the pic.. fixed now. It has what looks to be a simple two wire +/- (one striped, one plain colour...which one is which?) with that white connector on the end.

Is it as simple as wiring these two wires to the + & - wires on a 12v transformer? Probably not that simple is my guess.

If so obviously a safer way would be to use proper wire connectors of some sort yes?

[fatboy_1999]

Re: Please help me build my new roaster.

Ha,

You asked half of what I was saying whilst I was typing.

Short answer is YES - its that simple.

Proper connectors would be good for robust build, but you could just as easily do it with stripped wires, twisted on and covered with electrical tape.

[JavaB]

Re: Please help me build my new roaster.

Remy,

Bit hard to know which to connect.... the case (metal bits) is normally the negative and one wire will be continuous run, the other will be for "parking" the wiper at the end of the cycle.....

The motor needs DC by the way... from a power supply - a transformer normally provides AC.... and that wont make the motor turn..... just get hot!!

You might also have to change the gearbox so that it keeps turning in one direction rather than oscillating back and forth.

[Remy]

Re: Please help me build my new roaster.

*thud*........ OMG now Im sooh confused.... ok I admit it... Im an airhead,..and yes Im blonde,.. you might need to take that into consideration with your explanations. ;D

I will post a closeup pic of my wires,... I was so hoping I could just wire up the 12v transformer to it,.. that would be easy for me to do.... anything beyond that......please talk reeeeally slowly.

[JavaB]

Re: Please help me build my new roaster.

Remy,

OK, first bit is the transformer.... or powersupply.

If it has 12V DC to say 14.7V DC on the label etc.... it is fine It will also need to be at least a couple of amps I would think (depends on the actual motor.....) so what you need is something like 12V DC 2A on the plate of the powersupply....

But if it has 12V AC or 12V and a squiggly line (like an S on its side..... then its AC..... and wont work!

And if it is say 12V DC 1A..... it probably wont have enough current to run properly...... (but you could try this and see!

[Remy]

Re: Please help me build my new roaster.

Here is the wiring pics. Looks pretty simple right?


Can anyone tell me what each with is for. Also.. the flat round bit... I swear I saw that move very slowly once when I tried to get things moving with a 9V battery(using daughters science kit whahaahaha) Didnt see the actual shaft that I want to see moving..move though and havent been able to move anything at all since that one time.... maybe I imagined it :.