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DIY Honey extractor

Drew GSiH

New Member
Hi everyone, I am in the process of making a new 18 frame radial honey extractor. My abilities stop when it comes to electrics.
This is what I would like to do if anyone can help me with a setup that would be awesome.
I need a motor that can gradually spin, slow to start then speed up as the load starts to lighten. Max weight would be approx 50kg at the start and max rpm would be about 180 to 200 at the end.
it would be awesome if it could be programmed to work through say a 5 min cycle. alternatively a dial that I can adjust over the 5 mins would work to.
thanks heaps Drew
 

alec_t

Well-Known Member
Most Helpful Member
Welcome to ETO!
I'd be looking for a brushed DC motor with suitable reduction gearing and a PWM speed controller. 12V or 24V motors with enough grunt should be readily obtainable and speed controllers-a-plenty are to be found in model shops or online retailers. Controllers with a PWM-derived control voltage input can be driven from MCUs such as the ubiquitous Arduino. The Arduino community is huge and could provide help with programming. Alternatively, controllers with a potentiometer to control speed are also common, if you're happy with setting speed manually.
 

dr pepper

Well-Known Member
Most Helpful Member
On a budget you might be able to use a car wiper motor, they have a built in gearbox, in high speed they are about that kind of speed, you might not be able to put a 50kg drum direct on the motor but there ought to be enough grunt to rotate that weight via a belt or chain.
You can get Pwm controllers on ebay that would regulate its speed via a knob, connecting up is as simple as a battery/switch/bulb circuit.
 

Nigel Goodwin

Super Moderator
Most Helpful Member
On a budget you might be able to use a car wiper motor, they have a built in gearbox, in high speed they are about that kind of speed, you might not be able to put a 50kg drum direct on the motor but there ought to be enough grunt to rotate that weight via a belt or chain.
You can easily run windscreen wiper motors off 24V, and they happily survive long term abuse of that kind. They were commonly used on smaller Robot Wars type robots, and for many other purposes. Obviously running at 24V makes it a lot faster, and a lot more powerful.

Rex Garrod, one of the early Robot Wars contestents (and the first to use a flipper) used to use them for all sorts of special effects for films etc. and claimed to never seen one fail.
 

gophert

Well-Known Member
Most Helpful Member
I think our members are confused and have some assumption that you need to compress or squeeze the frames to extract the honey. A radial extractor simply allows space for 9 or 18 frames to be locked into a vertical axle in a something that looks like a garbage can. One long edge of each of the 19 rectangle honey frames attaches to the axle. A direct-drive motor or gear motor is attached to the drumhead to spin the axle.
He whole thing is generally well balanced and doesn't require much torque but controlling speed is important to account for unbalance a honey flies off the frame at slightly different times. As the bulk of the honey exits, speeds can be increased.

an accelerometer or other vibration detector should be used to control speed (along with a microcontroller).
 

shortbus=

Well-Known Member
Most Helpful Member
On a budget you might be able to use a car wiper motor, they have a built in gearbox, in high speed they are about that kind of speed,
They must use different motors for wiper where you live. The speed is ~60RPM on high and ~45RPM on low speed here in the States.
 

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