yeah they are pipettors.. one of these that are not fixed amount.. Picture: Oxford Benchmate Pipettor
Precision juice injection drop by drop
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Contemplating the problem for a few days now.
Quantity sent is not the problem, quantity remaining, IS.
Removing the excess may be cheaper and easier than sending an exact amount.
Not sure.
Quantity sent is not the problem, quantity remaining, IS.
Removing the excess may be cheaper and easier than sending an exact amount.
Not sure.
I tend to think the easiest way to manual feed might be a spray pump where the amount delivered is more controlled. With the right pump and hose size the quantity could be fine tuned. The liquid level of a squeeze bottle impacts the quantity delivered as does the viscosity. With a spray bottle the liq. level wouldn't matter (though I'd guess that viscosity would?)
What I'm picturing is a setup where each pump = 1 drop. So that multiple pumps would be the norm and thus help minimize flooding.
OR, maybe I'm just all wrong!!!!
What I'm picturing is a setup where each pump = 1 drop. So that multiple pumps would be the norm and thus help minimize flooding.
OR, maybe I'm just all wrong!!!!
I have a problem with sprays.
!. If I attach a tube to a spray nozzle, would not the tube have to fill before the liquid exits the tube. Leaving uncontrolled liquid in the tube.
Remember in a re-forning squeeze bottle liquid is trying to return to the bottle, due to negative pressure. In a spray system, once the pump action is complete, there is equal pressure within the tube. Allowing the liquid to free flow.
2. Viscosity is, I think a big problem.
3. But my greatest concern is the size of the pump.
This said, does not mean that I will not try them or that I'm not open to rebuttal.
!. If I attach a tube to a spray nozzle, would not the tube have to fill before the liquid exits the tube. Leaving uncontrolled liquid in the tube.
Remember in a re-forning squeeze bottle liquid is trying to return to the bottle, due to negative pressure. In a spray system, once the pump action is complete, there is equal pressure within the tube. Allowing the liquid to free flow.
2. Viscosity is, I think a big problem.
3. But my greatest concern is the size of the pump.
This said, does not mean that I will not try them or that I'm not open to rebuttal.
Good points Petercro,
Now poke your holes in this!
What if the spray pump is attached directly to the bottom of the atty (no tube used)?
For size, I'm thinking 1-3/4" gets you the pump and 3-5ml of juice (depending upon diameter of bottle). For a size comparision - a 2AA batt box is ~2-1/2" tall and thus heightwise it would fit with room to spare!!!
Now poke your holes in this!
What if the spray pump is attached directly to the bottom of the atty (no tube used)?
For size, I'm thinking 1-3/4" gets you the pump and 3-5ml of juice (depending upon diameter of bottle). For a size comparision - a 2AA batt box is ~2-1/2" tall and thus heightwise it would fit with room to spare!!!
On a squeeze bottle, how accurate does the squeeze have to be? I'd think not real accurate since the excess is sucked up? So what happens if you just mash the bottle and release? If you push too hard, too fast, or release too quickly is the suck back not as reliable?
Good points Petercro,
Now poke your holes in this!
What if the spray pump is attached directly to the bottom of the atty (no tube used)?
For size, I'm thinking 1-3/4" gets you the pump and 3-5ml of juice (depending upon diameter of bottle). For a size comparision - a 2AA batt box is ~2-1/2" tall and thus heightwise it would fit with room to spare!!!
Ok, round two -8-o that's my next test! just got these 3 spray sizes bottles in today from: Pocket Spray Misters - Lotioncrafter LLC
Also saw these might be modded with a disk and o rings as a funky "graduated" delivery (but of course, return is an issue) .. hang on: Lip Balm Tubes | U.S. Plastic Corp.
and so i was looking a stuff like these full tanks and systems. (See pix) found some less than 1 oz, and the tanks are kinda square.
theres a ton of stuff in hobby RC that can work on these boxes!
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Those spray misters (the 5 & 8ml size)are like what I've been considering. They basically appear to be the same top as the hand sanitzer spray pumps I've been thinking of using. My inital thought was to take and cut ~1" out of the middle (of the bottle) then glueing the top and bottom back together to form a bottle the exact height I want. I wonder how big the 2.5ml version is since it looks smaller the the others?
Spray bottles will work upside down but the bottle would have to be fairly full. Upright they work but it'll require a longish tube to bottom feed. Top feeding is of course easier (and was done very well - see the UPAC).
The spray bottle doesn't address a flood situation. Excess liquid isn't sucked back (like with a squeeze bottle) without somehow making an airtight wrap around the top of the pump.
Spray bottles will work upside down but the bottle would have to be fairly full. Upright they work but it'll require a longish tube to bottom feed. Top feeding is of course easier (and was done very well - see the UPAC).
The spray bottle doesn't address a flood situation. Excess liquid isn't sucked back (like with a squeeze bottle) without somehow making an airtight wrap around the top of the pump.
Mike.
No holes, just think of this.
Don't squeeze a bottle.
Don't push a bulb.
Don't pump a pump.
(JUST PUSH DOWN ON THE ATTY).
I kneel at the feet of a genius.
No holes, just think of this.
Don't squeeze a bottle.
Don't push a bulb.
Don't pump a pump.
(JUST PUSH DOWN ON THE ATTY).
I kneel at the feet of a genius.
That's got me intrigued but without more info it's hard to know where to start (the hole poking!).
Take atty and battery connector
Screw together.
Find small piece of pipe, so atty/battery connector can slide up and down within pipe,
without wobble.
epoxy small piece of pipe in mod box.
solder brass pipe into battery connector. (As my mod).
solder another brass pipe onto 1/16 brass pipe to enlarge liquid intake.
Hopefully pump bottle nozzle pipe will now fit within larger brass pipe.
End up with.
In one straight line.
spray bottle, larger brass pipe over nozzle, 1/16 brass pipe through battery connector into atty.
Hope you understand,
Screw together.
Find small piece of pipe, so atty/battery connector can slide up and down within pipe,
without wobble.
epoxy small piece of pipe in mod box.
solder brass pipe into battery connector. (As my mod).
solder another brass pipe onto 1/16 brass pipe to enlarge liquid intake.
Hopefully pump bottle nozzle pipe will now fit within larger brass pipe.
End up with.
In one straight line.
spray bottle, larger brass pipe over nozzle, 1/16 brass pipe through battery connector into atty.
Hope you understand,
Last edited:
Hi guys, been lurking for quite sometime now but I don't post much. Work like 10-12 hour days. But found this and figured I'd put in my 2 cents and hope it's helpful.
I've been using the same UPAC system I built since moonman introduced it. The only difference from moonman's system is the tube connection. I use a very thin tubing cut out from a butterfly IV needle.
I think I posted a link on the UPAC thread. I also use the spray pump. Link is in there too. I use the 4ml glass spray bought from ebay. One end of the IV tubing is epoxied to the spray pump. Other end goes thru a silicon tube I use as my mouth piece and then it is epoxied to a salvaged positive connector of a busted battery (negative part of connector is discarded). This does 2 things, keep the opening securely in place and pointing down toward the heating element and ensure the tube does not melt from the heat in case I get over zealous. I think this also restricts the amount of juice delivered.
Silicon tube mouth piece stretches enough to fit an 801, 901 or 510 and is transparent so that I see how much is delivered. IV tube is thin and pliable enough to allow for pumping freely and it consistently delivers exactly 2 drops. Half a pump delivers 1 drop.
If and when I have time my next project would be a 5 volt vaper. Same reliable delivery system. Am thinking of manufacturing my own enclosure but that's still in the drawing board. Don't have pics sorry...
I've been using the same UPAC system I built since moonman introduced it. The only difference from moonman's system is the tube connection. I use a very thin tubing cut out from a butterfly IV needle.
I think I posted a link on the UPAC thread. I also use the spray pump. Link is in there too. I use the 4ml glass spray bought from ebay. One end of the IV tubing is epoxied to the spray pump. Other end goes thru a silicon tube I use as my mouth piece and then it is epoxied to a salvaged positive connector of a busted battery (negative part of connector is discarded). This does 2 things, keep the opening securely in place and pointing down toward the heating element and ensure the tube does not melt from the heat in case I get over zealous. I think this also restricts the amount of juice delivered.
Silicon tube mouth piece stretches enough to fit an 801, 901 or 510 and is transparent so that I see how much is delivered. IV tube is thin and pliable enough to allow for pumping freely and it consistently delivers exactly 2 drops. Half a pump delivers 1 drop.
If and when I have time my next project would be a 5 volt vaper. Same reliable delivery system. Am thinking of manufacturing my own enclosure but that's still in the drawing board. Don't have pics sorry...
Hi jangler! And welcome - wonderful to have a lady modder on the thread!
been trying to find your link but to no avail. Any way you can borrow a cam and get some pix of your mods????
Like you, I've been convinced the spray bottle is the right approach (just got my bottle order in but no time yet to test!)
aloha
kai
What if the spray pump is attached directly to the bottom of the atty (no tube used)?
For size, I'm thinking 1-3/4" gets you the pump and 3-5ml of juice (depending upon diameter of bottle). For a size comparision - a 2AA batt box is ~2-1/2" tall and thus heightwise it would fit with room to spare!!!
OK, here's a bunch of numbers for the bottles i have: (copious post - let me know if you want me to dump any of this from the thread. if I could afford postage I'd mail a few to you guys. maybe next week)
Lotioncrafters
(it's late here so +/- .02mm!)
2.5ml spray bottles (pump head removed)
54mm extended (about 2-1/8)
51mm compressed
12mm diameter
pump head exit tube ID = 1.45mm
pump head exit tube OD = 3.17mm
5ml spray bottles (pump head removed)
72mm extended
68mm compressed
16mm diameter
pump head exit tube ID = 1.75mm
pump head exit tube OD = 3.47mm
My 901 atty bottom hole ID = 1.65mm
18 ga needle is reported here as 1.26mm OD.
17 ga = 1.47mm OD
16ga = 1.65mm OD
Petercro -GREAT IDEA! if we solder a washer/disc on the needle then maybe this will work easy as pie. If an 18ga needle then add a couple high-temp food grade silicone nano o-rings or silicone sleeve and it's in the pump and the atty, straight line! (Heard 18ga needle works for most PG blends - foregoing Scottbee's variable needle jet for a sec)
SO I guess 16ga is an atty press fit? Freeze the needle and press??? Heat the pump tubeand press in other end of the needle. Will try and get one tomorrow.
And in a 2AA box with no on/off switch on the base, the 2.5ml would bottom out out tightly. the pump-head tube can be cut down (like MrPuffer did, I think?) to give a shorter throw = smaller quantity delivered (one full pump is likely too much - no time to load and test now).
So maybe Petercro's idea, or bottle could extend out like the now famous UPAC? boxes we've seen. or the bottle could be shortened as MM was planning, kept inside and operated by a simple cam mechanism underneath the bottle, whose arm/lever protrudes from the side, enabling the box to stand on it's base. now where are the switches??? excuse the riffing
Nuff!and i wonder if routing a return line, back from the atty to the bottle, would work? would the pump also draw enough vacuum on the bottle side? wish i could mod full time;-)
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