Well done Zapta,
I was not sleeping much - new V2 of my unit should be out soon, here the draft of improvements
- supporting structure / fixing of stepper motor will be added,
- increased stroke, 2 location fixing,.. (will be working 100 % in both directions),
- total length extended a bit
and some more exciting ideas that might get into this new version..
A bit updated photos for perusal and comments are welcome !
More here;
http://www.ebay.de/itm/SMT-Solder-Paste-Glue-Liquid-Dispenser-Syrage-DC5V-USB-no-air-Lotpaste-Regler-/272054355052?hash=item3f57b4046c:g:s0IAAOSwxN5WUwskHere is a procedure we worked-out with one of my German Client:
I quote the email text:
"I didn't pre-heat the solder paste, just took it out of the fridge and let it rest for some hours at room temperature. I built up pressure until some paste came out of the needle and then released the pressure. First I tried pressing and instantly releasing again, but it was quite hard to get the right amount of paste on the pads.... It was a success with pressing and not releasing after. While the paste was slowly flowing I just did pad after pad and always got the right amount. I tried different needles and it worked even with really narrow ones. Did some DFNs, TQFPs, SSOPs, and many 0603s. Worked really neat, just had to remind me to build new pressure once in a while
I like the dispenser and I'm happy to finally leave my toothpick method behind me
""
Best regards,
xxxxxxxxx
So it is working well ...
While the paste was slowly flowing I just did pad after pad and
That description - from getting it out of the fridge to putting it away again - is exactly how I've been doing it by hand. My expectation is that a gizmo like yours would make the process better - quicker, or more accurate, or... well, something! Being able to pause between pads, for instance (which implies a button stab delivers a small and distinct amount, then nothing). Otherwise I am not sure why I would want to buy this and have a load more training hassles, plus ongoing maintenance, just to be able to do what I can do without it.
All commands are in your hand, You can chose smaller drops - use appropriate needle, / You can release pressure - and take a coffee brake and than continue and there is almost no maintenance needed... Surly it is mauch faster than pressing paste out of syringe with your hand finger.
Surly it is mauch faster than pressing paste out of syringe with your hand finger
I would have thought so. No, 'hoped so'. But the post I references seems to suggest not, so I don't actually know, hence why I made the comment
That description - from getting it out of the fridge to putting it away again - is exactly how I've been doing it by hand. My expectation is that a gizmo like yours would make the process better - quicker, or more accurate, or... well, something!
I am using a similar motorized arrangement and I think it's more accurate and faster than pressing by hand.
The trick is to adjust the push speed such that it creates a very slow and consistent flow out of the needle (I am using #22), I didn't measure it but around 0.5mm/sec (I am guessing here). Then you go from pad to pad and tap them with the tip of the needle, tapping larger pads a few times as needed.
The trick is to...
OK. I just envisioned it as placing discrete blobs per button press. I accept that might be wishful thinking, but that kind of thing is what drives someone to make stuff
The trick is to...
OK. I just envisioned it as placing discrete blobs per button press. I accept that might be wishful thinking, but that kind of thing is what drives someone to make stuff
The videos I saw of pneumatic dispenser show them placing beautiful individual drops of paste. The motorized one are much slower because of the gear ratio and the free play in the system so I don't think that individual drops are possible.
I am still holding my breath for Robenz's solution (hint) ;-)
What Does Robenz Stand For ?? - Link please if possible ?
robrenz is another member who's a top notch machinist.
He's come up with some amazing stuff; browse his posts and you'll see what we're on about.
Otherwise I am not sure why I would want to buy this
Accuracy. And don't tell me your thumb never gets tired. :
If I wanted to paste by hand, I would probably try one of these. But even watching the compressed air variety in action, I can't imagine getting much utility out of dotting every pad by hand.
Accuracy. And don't tell me your thumb never gets tired.
I don't see there is a change in accuracy, but my thumb can get tired. On the other hand, I use raw paste and not the diluted stuff recommended for these, so perhaps if I used that then my thumb would be OK.
I think it would likely be a step forward, but not quite the quantum leap I dream of
I think it would likely be a step forward, but not quite the quantum leap I dream of
Regardless, it's fun to build it
Ahh, love at first paste. This is the most emotional soldering video I have seen in a long while.
Is this Sinatra "My Way?"* And why does Youtube not edit out your music? Do you pay royalties for bringing us this entertainment?
*Neermind. I thought something sounded familiar. Post #150
I do it my way:
That USB syringe dispenser seems to be interesting to hook up with CNC machine to paste boards cheap
No output on that model ..
This one might be better for CNC but its still under development & testing ...
Ahh, love at first paste. This is the most emotional soldering video I have seen in a long while.
Is this Sinatra "My Way?"* And why does Youtube not edit out your music? Do you pay royalties for bringing us this entertainment?
Not to mention that Mike is playing it with one hand while applying paste with the other. Awesome.
I purchased a
USB Extruder Solder Paste Dispenser from the Mike Store on Tindie.com.
I received the dispenser after some delays in Canadian customs (the seller offered AMAZING support). The unit is solid and well built and fits well in the hand. I bought the dispenser for my first SMD project so I had high expectations and I was not disappointed. It took a few tries getting used to the operation of the buttons, getting the paste warm enough and choosing the correct dispensing needle. In 15 mins I was dispensing paste on 0402 and bigger pads without any problems (except for my eyesight!). This unit is now one of my go-to tools for building my small-run prototype SMD boards. I received the "older" version of the dispenser and the newest model looks to be even better. I highly recommend this unit.
Thanks Peekay - Im glad my dispenser works great for you!!