I bought HAKKO 394, which is an adsorption type tweezers with a built-in vacuum pump.
- HAKKO 394
- Use to mount components on a board
- Advantages and Disadvantages of Using HAKKO 394
- Combination that you should buy
- I’m glad I bought HAKKO 394.
The cordless suction tweezers
HAKKO 394 is an electric cordless suction tweezers.
To date, surface mount chip components, such as the 1608, have been mounted using inverse tweezers.
ICs and microcomputers with large areas have been mounted using manual suction tweezers.
The merit of the cordless tweezers I bought this time is that it can absorb not only IC but also chip parts.
Therefore, parts cannot be mounted in high density with tweezers.
If you pay attention only to the trembling of your hands, you can mount it more densely than with tweezers.
In order to absorb chip components such as JIS 1608 (0603) and JIS 1005 (0402), it is necessary to purchase an optional 0.26 mm nozzle (vent nozzle A1198) separately.
When the vent nozzle A1198 is installed ↓
Try to suck the parts
The adhesion force was very weak and it was difficult to adsorb, but once it was attached, it could move to the substrate.
Use to mount components on a board
Print the solder paste with a stencil.
Secure the target board by placing an unnecessary board of the same thickness around the target board.
More information on stencils and reflow can be found here.
The solder paste is placed nicely.
Pick and place
SOT 323 package
The suction force is weak and it doesn’t stick easily, but it can absorb SOT 323 package.
There will be less solder defects such as lead sticking into solder paste and lead floating.
Chip diodes are difficult to visualize because they tend to be upside down if they are taken out of the tape and torn apart. Moreover, it is very difficult to see the line that shows the polarity.
So it is very troublesome to pick in the right direction.
It worked from the first time I tried.
This is useful.
The chip capacitor of JIS 2016 (0806) size was also able to be adsorbed somehow.
Therefore, a suction cup (pad A1166) with a diameter of 3 mm is used.
This suction cup is attached to HAKKO suction tweezers if you have one.
It is so efficient.
Reflow to complete the substrate
If you use a thermocouple thermometer, you can monitor the temperature of the board, so it is very convenient to know if it is not heated enough or heated too much.
I only need to know the approximate temperature, so a cheap one is enough.
It’s convenient if you have it.
Thanks to the use of HAKKO 394 cordless suction tweezers, it was completed in a relatively short time.
Advantages and Disadvantages of Using HAKKO 394
Benefits : Shorter mounting time
You don’t have to tap the parts to face the front or check the direction to arrange them.
Benefits : High density mounting
Disadvantage : Weak adsorption force
The advantages outweigh the disadvantages.
However, even if you include this drawback, the merit is better.
It is so convenient that I can’t go back to the tweezers.
Combination that you should buy
In addition to the HAKKO 394 cordless suction tweezers that we have found through actual mounting, we will summarize the optional parts necessary for mounting the chip parts.
The bent nozzle A1198 is required to pick parts smaller than 2 mm, such as chip resistors, chip capacitors, chip diodes, and SOT 323.
A suction cup (pad A1166) with a diameter of 3 mm is required for parts that are larger than 3 mm and up to 5 mm, such as chip coils and SOP ICs.
The QFP package does not require any options.
For parts larger than 5 mm, such as the QFP package, a combination of the bent nozzle provided with the HAKKO 394 and a 5 mm diameter pad can be used.
I’m glad I bought HAKKO 394.
I thought I could adjust the suction force if there was a circuit to keep the suction force constant, so I disassembled it.
You can take it apart by removing 3 screws.
The mechanism is very simple : it consists of batteries, switches, pumps and hoses.
There was no mechanism to adjust it, but because of its simple structure, if you simply increase the voltage, you may be able to increase the suction force. I will try it later.