I am wondering, is it absolutely necessary to be able to control the rotational speed?
Regards
Deez DIY Magnetic Stirrer
- Thread starter Dietz
- Start date
Regards
from what ive seen with my testing, yes, The stirrer bar has to be aligned on the magnet before it spools up, otherwise it just plots around the bottom like a flea on fire. And also shoots off the center if the RPM goes too high
Nice one.
Where from?
Yes it is. In my case when the fan runs at full speed, the bar doesn't rotate at all, of its too slow, the bar just sticks to the magnet on the fan and the fan only rotates after you move the bar away.
Also at high speed rotation the liquid creates a vortex which introduces air in it, and we definitely don't want that.
I just put the smallest one directly in a 60ml bottle which is stirring right now. Will take it out with the help of a magnet once it's done..
I think for the price they go for it could only be beneficial. I pondered about it as well seeing that the closest place I can find them is 110km away...that's a heck of a drive for something that retails for R12. But when all is said and done this should last a long time.
The POT/variable resistor is cheap, but the controller I and @Dietz bought for this is r60. It's definitely worth it. U can fine tune the speed really nice.
Not sure it will fit in my setup though. Will take it with me when I go do the shopping.
you can use a light dimmer get one with the nob not the one with the electronic switch its a bit easier to work with and you might get it more freely available
you can use a light dimmer get one with the nob not the one with the electronic switch its a bit easier to work with and you might get it more freely available
cutting the blade is not going to be helpfull.the fans are designed to keep itself cool.also you should cut vents in you holders/tubs for air to enter and exit so your fan doesn't get hot enough to affect performance.
cross vents should work.
cross vents should work.
and that is especially if its not going to run at designed speeds.so keep the fins your fans will last longer
Staring at this setup, all parts aquired and mounted, all YouTube videos about wiring potentiometer, voltage regulators, switches, l.e.ds watched and downloaded, heating pad ready to go...and I don't own a soldering iron.
No need to solder, u can just tie up the wires on the terminals, should work just fine.
I considered that, actually I was busy with wrapping the 1st one and it just didn't look good. Spent some money on this, so want it to proper. This is a mining town, one of my neighbours MUST have one...pondering...
Aand its working, V3 (AKA V8.8.2) The FrankenbeastMixer 
Im really happy with this version I think there will be only one more version after this, to get it into a good looking enclosure with a Heatpad.
Will upload videos later but here are some pics
After a 15 min stirrr
On for 30 Seconds
Im really happy with this version I think there will be only one more version after this, to get it into a good looking enclosure with a Heatpad.
Will upload videos later but here are some pics
After a 15 min stirrr
On for 30 Seconds
Well done @Dietz. Faster than Fanie she looks.Aand its working, V3 (AKA V8.8.2) The FrankenbeastMixer
Im really happy with this version I think there will be only one more version after this, to get it into a good looking enclosure with a Heatpad.
Will upload videos later but here are some pics
View attachment 131817
View attachment 131818
After a 15 min stirrr
View attachment 131819
View attachment 131820
On for 30 Seconds
View attachment 131821
View attachment 131822
congrats @Dietz, looks like its working great.
pity i only saw the thread now, I could've helped. I built version 2 of mine a few months ago.
I also quickly realised that even though it can stir water or pg, VG is VERY thick. And for this reason you HAVE to have speed control, and I had to double up my magnet strength.
I also went with an AC motor from a desktop fan, so that it would have more torque. I actually bought the fan new from clicks and stripped it just for the motor and wiring. I liked the idea of an AC fan also because I could plug it straight into a wall socket without the need for a 12v adapter, and because of that I was able to use one of my house light dimmer switches as a donor speed control. AC motors dont use voltage to regulate speed, you have to regulate the hertz rating of electrical signal. but it was easy enough.
I used a project box from communica to house the whole thing.
see pics attached.
@Raindance - the attached video shows why speed control is necessary. sometimes the stirrer bar disconnects from the magnet, and you have to stop it to get it to "stick" again. if you cant control the speed then this happens everytime you start the motor.
pity i only saw the thread now, I could've helped. I built version 2 of mine a few months ago.
I also quickly realised that even though it can stir water or pg, VG is VERY thick. And for this reason you HAVE to have speed control, and I had to double up my magnet strength.
I also went with an AC motor from a desktop fan, so that it would have more torque. I actually bought the fan new from clicks and stripped it just for the motor and wiring. I liked the idea of an AC fan also because I could plug it straight into a wall socket without the need for a 12v adapter, and because of that I was able to use one of my house light dimmer switches as a donor speed control. AC motors dont use voltage to regulate speed, you have to regulate the hertz rating of electrical signal. but it was easy enough.
I used a project box from communica to house the whole thing.
see pics attached.
@Raindance - the attached video shows why speed control is necessary. sometimes the stirrer bar disconnects from the magnet, and you have to stop it to get it to "stick" again. if you cant control the speed then this happens everytime you start the motor.
Attachments
Thanks @veecee, that look good. Thats exactly what I am planning to build it into from this, add a heating pad and get some bigger stirrer bars
And here are some Videos of V3
I think this is the final update. I am going to do a few minor updates to this, but nothing major mostly to look better.
Initial testing with water:
More testing with water:
And testing with some Freshly mixed juice (Pychee By Rude Rudi):
WARNING, Lots of noise from the plastic container. turn down the volume.
Testing how high it can go with a 70/30 Mix (roughly 95ml), Noise should reduce if I use a Better housing for the mixer and a glass mixing beaker.
And finally some last pics:
Thanks for all the help and advice from everyone this thing rocks!!! I am way more eager to mix something knowing that I dont have to shake anything!!
I think this is the final update. I am going to do a few minor updates to this, but nothing major mostly to look better.
Initial testing with water:
More testing with water:
And testing with some Freshly mixed juice (Pychee By Rude Rudi):
WARNING, Lots of noise from the plastic container. turn down the volume.
Testing how high it can go with a 70/30 Mix (roughly 95ml), Noise should reduce if I use a Better housing for the mixer and a glass mixing beaker.
And finally some last pics:
Thanks for all the help and advice from everyone this thing rocks!!! I am way more eager to mix something knowing that I dont have to shake anything!!
Last edited:
Nice!!!
That thing rocks! Deserves a lekka enclosure. Communicate has some good ones.
I'm curious what components you used, and where you got them.
My diy spidey senses are tingling!
Sent from my FIG-LX1 using Tapatalk
I'm curious what components you used, and where you got them.
My diy spidey senses are tingling!
Sent from my FIG-LX1 using Tapatalk
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