Making honey sticks (or maple syrup) sticks is a straitforward and simple process. The basic steps involve filling a straw with honey and then sealing both ends. The difficulty arises in actually getting the honey into the straw and doing it efficently (so that the time it takes to make them isn’t more than the value of the honey stick itself).

Initally to see if they could be simply made, a sort of proof of concept, and so that we could make some as samples we used a large plastic syringe (pictured to the right) from US Plastics. The tip did need modified slightly to fit inside a standard drinking straw (available from any resturaunt supply store). The tip can be molded by heating it and molding it carefully with your fingers, being careful not to burn yourself. It does work reasonably well if the honey is warm, though is not really suitable for making large numbers because it needs to be refilled every dozen honey sticks, is relatively slow and can be quite a strain on the hand.

Sealing the ends or the straw is a simple task using an impulse sealer (left). Again these are available from US Plastics, on ebay and from many other retailers. The heat is easy to adjust with the knob on the front of the sealer. You will need to adjust it by trial and error until you get a good seal. Do not adjust it by using an empty straw. You will quickly find that it needs far less heat to seal an empty straw than a honey filled straw. (I should also note here that the impulse sealer is also very usefull for sealing plastic bags and even making pollen patties, so it is usefull for more than just making honey sticks.)

Making honey sticks in larger numbers requires a better setup for filling the honey sticks however. Instead of using a heated honey tank, hand pump and manifold that holds several straws, we have used a simple stainless steel pressure tank. This tank (right) is a surplus tank originally used for holding premixed soda (or pop). Mine was purchased on ebay. Honey is placed in the tank and an air compressor is attached to pressurize the tank to 90psi. The straws are then filled using a simple valve with a brass nozzle. It does work better if the honey is warm, though I do not like heating up the honey as much as other systems do and have found this system works resonably well at 90 degrees. Before we start the tank is placed in our honey warmer, but during use it’s placed in a 5 gallon bucket with a band heater to keep it warm (sold for heating up honey buckets by Mann Lake and others).

To make it easier to fill many straws at once, a plastic or wooden bar with holes (and split down the middle) is used to hold a dozen straws at once. This makes it relatively easy to fill and seal several at a time (below). It does make a bit of a mess, hence the newspaper for easy cleanup, but does not make as near the mess as the plastic syringe. Once sealed the straws ends can be cut close to the seal and washed in warm water to make the finished product. With practice you can get to the point where many of the straws are sealed very close to the end and don’t need cut.

I am building an automated honey stick machine as it’s simply getting to take too much time when making honey sticks by the 1000. But if you are looking to make some as samples, or even several hundred at a time, the above works pretty well with considerably less expense than a commercially available system.

Some of the outputs of the Phidgets USB interface will be used to drive AC voltage. For these I’ll simply use a solid state AC/DC relay because it provides reliability and isolation from the AC line. Plus it’s much cheaper than building your own circuit unless more than an Amp or so needs switched.

The rest of the outputs will be used to drive solenoids using a MOSFET solenoid driver as pictured below. The MOSFET driver was chosen simply because I was concerned about the somewhat limited mechanical life of the relays in a transistor relay driver.

MOSFET Solenoid Driver: This is a very simple circuit and is repeated for each of the solinoid or other DC devices we wish to control with the Phidget USB interface. It accepts a digital 5 volt input and can drive a significant amount of voltage and current depending on your selection of MOSFET. I have added a LED to the circuit as well to indicate the state, after all… the most important part of a fancy machine is a lot of blinking lights.

R2 is a a 1M Ohm resistor intended to drain the voltage on the input when it goes to 0 and speeds up the switching speed (as the MOSFET gate can act as a capacitor. R1 should be sized to limit the current though the LED, with a typical LED with a 1.7 voltage drop and 20mA current rating , R1 = (V – 1.7)/ 0.02. Or 515 Ohms at 12V or 1115 Ohms at 24V, etc. (round up to the nearest resistor).

Phidgets recommends D1 be a 1N4148 diode, which is a high speed 200mA 100V diode. Due to some of the currents I will need to be switching, I’ll be using a 1Amp or better version instead.

As previously mentioned, I intend to use the Phidgets 8/8/8 USB interface and a computer to control the honey stick machine. Before I get too much into the actual mechanical design, I need to define the steps involved and all the output’s and inputs required.

First the outputs…. I intend to use solenoids for most of the moving parts of the device. They seem to be more readily available than the pnumatic cylinders used in the Sticky machine, and for me at least, I’m much more familiary with the electronics with my electrical background. Plus, with a rated life of 2,000,000 cycles they should be reliable enough. I originally intended to drive them with simple transitor driven relays, and even designed the driver circuit, but I was concerned with the mechanical rating of only 100,000 cycles on the relays. This may sound like a lot, but with a machine in the $3000 price range, if it needed replaced every 100,000 honey sticks, it would cost 3 cents per stick just for the machine cost alone, or around $132 per 5 gallon bucket of honey processed, nearly the price of just sending the honey to someone else to fill (at $175). So to minimized the cost per stick, I’ve opted to use mosfet solenoid drivers, and solid state relays for the AC devices (the pump, etc.) which should reduce the cost of operation by a factor of 10 or more.
The outputs are as follows:

1. Straw feeder, drops the next straw into the machine (solenoid)
2. Straw ejector, kicks out the filled straw from the machine (solenoid)
3. Clamp, holds the straw while in the machine (solenoid)
4. Filler nozzel, moves the filler nozzel into place (solenoid)
5. End positioner, effectively clamps the straw horizontally while filling (solenoid)
6. Right sealer (solenoid)
7. Left sealer (solenoid)
8. Honey pump (120V AC pump, AC relay)
9. optional – Honey heater (AC relay)
10. optional – right sealer heater (AC relay)
11. optional – left sealer heater (AC relay)
12. not used

Of course one should note that more than 8 outputs allowed by the USB driver are proposed. While we could do without the heater relays, it would be nice to control everything from the computer and I’m not quite sure what I’ll run into once I get into the guts of the machine so an extra output is good.

Demultiplextor and driver circuits are to follow in the next post….

As I mentioned in a previous post, I am attempting to build my own automated honey stick machine. After making observations making hundreds of honey sticks using a manual method, and studing the machine the use to be on the market, I’ve decided to take a bit different approach. Of course any automated honey stick machine will follow the same basic steps, dispensing a straw, filling then sealing it; But I’m hoping the different approach will solve a few problems (and solve the biggest problem – the fact I don’t have one!)

Instead of a embedded controller, I’ve deciced to go with a USB interface to the computer, then simply program the computer to drive the machine. I’ve chosen the Phidgets Interface 8/8/8 as the USB interface (pictured to the right). It’s capable of driving 8 binary outputs as well as accepting 8 binary and 8 analog inputs. It’s also pretty easy to program in many different languages on both unix and windows machines. I will likely use Visual Basic as I’m very familiary with it. The only limitation that may be a problem is that it may be possible that more than 8 outputs are needed for controling solinoids, pumps, etc. However, instead of purchasing a second interface I intend to use to 3 to 8 decoder and a latch to turn on and off some of the outputs one at a time.

To give credit where it is due…. Anthony of www.anthonysbeehive.com recently made an apperance on Beesource.com. Apparently he has had the problem most small business owners and some hobbiests only hope to have. Too many orders and customers that he has fallen behind filling orders. He has promised to make it right and is working on fixing the problem. I hope he does follow though as it is the only honey stick machine currently on the market, and even if it is a manual machine, it relatively cheap and looks like it does a pretty good job. Still, it may still be wise to purchase COD or give him a call first to see if he is caught up.

My wife and I have been making honey sticks (or honey stix) for some 6-9 months now and they do seem to be fairly popular. But that’s where the problem lies. We basically make them by hand. This is fine for making a small number for samples, but really does get tedious when making them by the hundred. (For those who don’t know, honey sticks are simply drinking straws filled with honey and sealed on both ends. This is great for a snack, to carry when you need to increase your blood sugar (apparently it’s better than table sugar), or to take to work or a restaruant for your coffee or tea)

Initally we used a large plastic syring from US Plastics, and this did work well, but was really slow as you had to refill the syring after every 10 or 12 sticks. We did find that using a device to hold a dozen straws made the sealing pretty easy with an impulse sealer, but filling the straws was a big problem. We have since switched to a stainless steel pressure tank, the kind premixed carbonated drinks came in. The tank is connected to a air compressor and a hose with a nozzel and valve to fill the straws. This works quite well so long as you keep the tank warm so the honey flows quickly. But this still takes quite some time and is still very labor intensive (and gets quite boring). I really have better things to spend my time on.

So an exaustive search for a honey stick machine was made. Unsuccessfully. There are (or were) two such machines on the market.

• Goldrush from www.anthonysbeehive.com. This is a manual machine and really isn’t any better than what we are already doing. I also think it heats the honey up too much and it appears the straws aren’t sealed exactly on the ends so they need cut and/or washed out after sealing them. The price is around $600 and claims to be patent pending. Most disturbingly it appears the owner may not be very trustworthy several reports of machines not delivered and refunds not made (or only partially made) posted on beesource. Plus the owner use to sell them on ebay but his account was mysteriously closed.
• The Sticky Machine from Busy Bee Farm. This machine looks like it has promise as it is more fully automated. I did manage to contact the owner and unfortunately the machine is no longer being made. The owner did state that another person has taken it over but does not know when he may begin making machines. (Another source indicated that this has been the story for the past several years, and given the lack of updates to the Busy Bee Farm website it could very well be true). In addition the machine does appear to have some fundamental problems involving the sealer that needs cleaned every 100 sticks and the video on the website shows that the finished stick must be manually removed. The machine costs $3000 delivered (2003 prices from the website) and appears to be protected under us patent 7,047,709. (Note: the abstract of the pantent makes it appear so general as to apply to any automated honey stick machine ever made, though the actual text of the patent is much more specific in it’s claims.)

That pretty much sums it up. There are two machines, but don’t expect to get ahold of either of them. (If anyone is interested I’d be happy to post the deails of how we fill our honey sticks currently).

So I’m now working to develop my own honey stick machine before my wife decides to lynch me when the next honey stick order comes in.