PE-986A/983A solder paste dispenser

[ian]

Not 100% sure, but I think this is the one that listed at about $45:

http://www.ownta.com/jnd-983a-digital-a ... enser.html

JND-983A Digital Automatic glue dispenser

Automatic Liquid Dispenser with time control. To push the liquid pneumatically, controlled by time, to be sure the same dispensing drops and dispensing cycle time,regulated the air pressure with suitable tip at your equipments of the different liquids as glues, solder pastes. Applied for 10 types of steel tips and 5 types of plastic tips for various customers’ needs…

JND-983A Digital Automatic glue dispenser Specifications:

Power supply: AC 220V+/-10%/50Hz / AC 110V+/-10%/60Hz
Power consumption: <8W
Function mode: Hand mode/Autoloading mode
Air source: max.0.99MPa
Min.dispensing quantity: 0.01ml
Stress control range: 0.05MPa--0.99MPa
Size: 235mmx225mmx63mm
Time control range: 0.01S-1S;0.1-10S;0.2-20S;0.3-30S
Weight: 2.2kg

Adapt to the following liquid: instant glue, red glue, anaerobic glue, black glue, silica glue, SMT red glue, yellow glue, silver glue, Si glue, epoxy resin, screws fixative, Lubricating Oil, and flux.

Not sure if it is that exact mark, but has the same adjustments and stuff.

[ian]

Package is being delivered in an hour or two, but I missed the order deadline to get the Air Compressor today by 5 minutes :(

[nickjohnson]

I thought that one looked very cool, but it's really expensive if you're not actually in Shenzhen. I don't suppose you've seen it any cheaper than ~$150 USD outside Shenzhen?

[ian]

Mine is actually Spersder PE-986A but seems exactly the same as all the 983s out there. There are jumper switches on the back, but the meaning is unclear as the manual is totally in Chinese. Here is some info from an aliexpress comment:

The DIP switches have multiple functions. All DIPs down and becomes completely manual with box, pedal or barrel 'shot' switch controlling dispense time. All DIPs up and keeps repeating for set dispense time at set interval time. DIP 1 down and DIPs 2, 3 and 4 up then will keep timed dispensing at set intervals while 'shot' switch is pressed . Other DIP positions set shot number per press

@nick - never looked, but seeing now on aliexpress they are WAY too expensive. Pre-bargain price on this was $45 USD.

[matseng]

This site http://www.hi1718.com/news/price/10280.html lists some prices for last year.

Automatic high-precision digital to dispenser JND983A different quote in the following four areas in Shenzhen offer of 350-510 yuan, priced at 335-458 yuan in Dongguan, priced at 300-355 yuan in Guangzhou, Ningbo region offer of yuan 378-450.

(300 yuan = USD 48)

[ian]

F1: engage foot switch, spits out continuously. Release switch to stop.
F2: step on foot switch once, spits out according to the preset duration. step on foot switch again to stop.
F3: engage foot switch, spits out continuously according to the preset duration. step on foot switch again to stop.
F4: automatically spit out according to timer settings.
F5: step on foot switch once, spit out one time according to the preset time.
F6: step on foot switch once, spit out twice according to the preset time.
F7-F16: (same as F6, but 3 - 12 times)

From EEVblog forum:
http://www.eevblog.com/forum/chat/trans ... /#msg78447

[neslekkim]

the cheapest ones I have found is the 982, but doesnt have the display
http://www.ebay.com/itm/281035120564

But I guess its better to get an unit that others have already experience with, easier to get help/tips for usage. And pre-bargain price of $45 is very good!
I guess tips and so on is very cheap there also?

[ian]

They have cases and counters full of all imaginable syringes and tips and related paraphernalia. Most of it is pennies. I'll need to find out which type I like, then buy a bag of them. The selection is overwhelming.

[neslekkim]

yea, I bought some bags with tips from an dealer, but it's difficult to know which sizes you actually can use, so for me, who is not even Gauge compatible (I'm metric), I easily would sit with bags of useless tips;)

[ian]

Got the compressor. It's cute, but probably a 24L would have been better. It seems to need to (loudly!) add air after a dozen or so shots with the dispenser.

Have not got the dispenser working yet. Even at 100PSI nothing comes out. I can see the plunger move and the hardware works great, but I think there is too much paste in the syringe and it's like the Mr. Wizard experiment where a tissue over a paper towel tube filled with salt can withstand a broomstick blow...

Will try some more once the neighbors wake up :)

[Sjaak]

Im assuming you took it right out of the fridge? I think the solderpaste needs to be at room temp to be more fluid.

[nickjohnson]

I'm curious if you can estimate how much air is used for each dispensing - perhaps by checking the pressure gauge after a few shots? I really want to try one with bottled gas, but that only works if my estimates about how long a bottle will last are correct.

[ian]

I did let the paste warm. Using less and bigger needle with high pressure seemed to help. Still working it out and will try a new solder paste now.

IT uses quite a bit of air. My 6L tank goes from 100psi to 50psi (if turned off) in only a few dozen shots.

[ian]

The mechanic paste works _way_ better. I don't think the sparkle paste is formulated correctly for the dispenser.

[nickjohnson]

I did let the paste warm. Using less and bigger needle with high pressure seemed to help. Still working it out and will try a new solder paste now.

IT uses quite a bit of air. My 6L tank goes from 100psi to 50psi (if turned off) in only a few dozen shots.

Wow, that's way more than I expected. Does it sound like it's leaking anywhere when you're not using it?

50 PSI is 3.4 atmospheres, which means you went through about 20.4 litres of air in 'a few dozen' shots, which I'm going to randomly guess at 36, which means about half a litre of compressed air per shot.

A disposable welding gas cylinder contains 390 grams of CO2, which is about 197 litres of air at STP - working out to only about 400 shots per cylinder(!), or 3.5p each!

A small beer gas cylinder contains 3.15KG of CO2, which is 1590 litres, so you'd get about 3000 shots per cylinder, or about 0.5p each. At that rate it'd take about 12,000 shots to pay for a compressor.