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Dazv

Homemade magnet advice!?

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Hi all, I've been lurking around for a while and really enjoy the forum!

Got a question for you guys out there. So I'm wanting to make a magnet and have just got hold of an old Bosch wiper motor from a Passat. The part that I need advice on is how to wire it up! It has red and green wires that come out of the motor and attach to the gearbox? Also from the gearbox there are 5 other wires the go to a large connector. I have no idea about how to wire it to the battery and can I just put a dimmer switch I between the 2 for speed control?

 

I know this subject has been covered many times but can't find anything on this subject. Any advice is greatly appreciated! Thanks guys Darren

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I made quite a few for shooting buddies but not for a while now so memory is faded on colour connections.

The red and green to the gearbox if memory serves me right is the wiper "rest" switch and not used for a rotary.

Red is the most likely the + connection to battery , black or sometimes blue is the - connection , other connections can relate to single wipe from the stalk.

As for the dimmer switch if you mean from a car light or heater dimmer if its an electronic control rated at 5 amp its best checked with a handbook wiring diagram, if a standard old type dimmer it has to go in line with either a + wire or - wire not connected across both.

Sorry a little vague but the ole brain cells not what they used to be :( no doubt someone will know a little more or try and check on line for passat wiring diagram for the wiper.

 

Deny

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Thanks very much for your reply! Right so I can attach the 2 wires that come out of the motor straight to the battery and it should start spinning? Cherrs

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Thanks very much for your reply! Right so I can attach the 2 wires that come out of the motor straight to the battery and it should start spinning? Cherrs

yep , best if you have the arms turning anti clockwise to avoid the shaft nut from coming undone during use in wind and when cutting power..

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Perfect! Shall I just ignore the rest of the wires? Very silly question but is there a way of making spin different ways then? Thanks for the advice I know absolutely nothing about electrics!

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Yes ignore the others they are not needed.

Connect a battery to the two motor wires and see which way the drive shaft rotates , if clockwise then just swap the leads over .

Its not overly important, if you use locktite on the shaft nut when doing it up then it really doesnt matter that much , just my preference after having the nut come lose and the arms in a strong wind one day .

Edited by deny essex

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You can use a dimmer switch as long as its not a variable resistor type or all you are doing is losing juice from the battery I believe...I'm sure one of the Electricians on here will advise.

Edited by Adge Cutler

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Hi guys cheers for the advice, so I hooked up a battery and tried touching to two ends different terminals on the gearbox, I found putting them on different ones I was able to find a slow speed fast speed and it went anti clock wise! Would I be able to solder done small connectors to the different points so I can swap them around if I want a different speed on the magnet? Thanks again guys much appreciated

Also do I even need a switch? Could I just attach the battery straight to the motor? Cheers boys

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Just another though could I have small crocodile clips that come from the battery wires that I clip straight to the row of connection points?

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Just another though could I have small crocodile clips that come from the battery wires that I clip straight to the row of connection points?

When you know what goes where, get yourself some crimp on ends to the motor and crocodile clips for battery end.

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Just another though could I have small crocodile clips that come from the battery wires that I clip straight to the row of connection points?

Yes always done it this way! i prefer to set it on the higher speed and use it like that, with no speed controller.

 

Good point made by Deny regards the the direction of rotation making the nut loose :good:

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Marmite I've pm'd you.

 

That's great news that way I can just put the clips different terminals until I find a combination that works? Could I damage the motor by connecting it to wrong terminals? Like I said know nothing about electrics haha

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Marmite I've pm'd you.

 

That's great news that way I can just put the clips different terminals until I find a combination that works? Could I damage the motor by connecting it to wrong terminals? Like I said know nothing about electrics haha

if just connecting the motor wires no.

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if just connecting the motor wires no.

So I connected the battery leads straight to the terminals on the gearbox which is where the motor leads are attached to. Am I going to ****** it up? Thanks for that!

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Just use crocadile clips on your battery and small spade connectors on your row of connection points on the motor.

 

Just try the combinations till you suss it out. You won't damage the motor.

Edited by aga man

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That sounds like a plan! Thanks guys for all the advice much appreciated I'd still be scratching my head if I didn't ask you guys!

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Mine has a simple clutch mechanism on the top of the spindle which lets the arms freewheel in a stronger wind.

 

I run a cable back to the hide and switch it off when the wind is strong enough to spin it.

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I built one using a Ford Escort wiper motor but it pulled far too much from the battery and only lasted 2 hours on a fully charged 10 amp battery, I tried it with an on / off remote control switch, but on the second time out one arm caught on the ground and stalled it, the remote switch melted under the increased load from the motor so I had to run it permanently on from then on, also I used mild steel rod for the arms which were fine with the plastic decoys but just sagged to the ground when dead birds were mounted.

I lost interest after several attempts to improve failed, just went to A1 and bought a basic magnet, fantastic bit of kit, runs 5 to 6 hours with dead birds mounted and has never let me down in 2 years use, also much lighter in weight than my home made one. :lol::lol:

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I built one using a Ford Escort wiper motor but it pulled far too much from the battery and only lasted 2 hours on a fully charged 10 amp battery, I tried it with an on / off remote control switch, but on the second time out one arm caught on the ground and stalled it, the remote switch melted under the increased load from the motor so I had to run it permanently on from then on, also I used mild steel rod for the arms which were fine with the plastic decoys but just sagged to the ground when dead birds were mounted.

I lost interest after several attempts to improve failed, just went to A1 and bought a basic magnet, fantastic bit of kit, runs 5 to 6 hours with dead birds mounted and has never let me down in 2 years use, also much lighter in weight than my home made one. :lol::lol:

That is possible if I remember correctly using early ford wiper motors to wire them up in a fashion that they do work but draw in excess of 5 amp hour, I cant quite remember the correct wiring layout to correct that happening.

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Ah right I'm ist toting to hope it lasts long enough haha

I'm planning on getting my hands on a car battery so hopefully should last long enough!

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I'm not too worried about weight as it only takes a minute from my car where I shoot! Also I'm pretty sure I've got a freind with a spare car battery( very tight budget) also a quick question about arms? How long should they be and do they need to have any flex to them?

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2 mtrs to 2.5 overall would be fine , a little flex on the end half can give the bird a little bounce which I think adds a little to the show.

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Ok perfect thank you! I'm thinking about trying some bamboo canes as arms! I've also got some tent poles but they aren't long enough to make 2 meters!

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