Rework with LitePlacer

R

Robert Baer

Guest
I have some generic PCBs that i need to rework by placing 0805
resistors for configuring.
Seems that a generic PCB heater is needed for 180C preheat (simple),
plus a way to heat the part to be placed, as well as pad areas for
reflow (not easy).

Soldering schemes i thought of:
laser to heat and/or spot weld
IR beam to heat
focused airflow to heat
tweezer probes configured for spot welding
soldering iron
soldering gun

Has anyone done this?
What would it cost to have the LitePlacer appropriately modified?

Thanks.
 
On Sun, 19 May 2019 01:28:54 -0800, Robert Baer wrote:

I have some generic PCBs that i need to rework by placing 0805 resistors
for configuring.
Seems that a generic PCB heater is needed for 180C preheat (simple),
plus a way to heat the part to be placed, as well as pad areas for
reflow (not easy).
How are you going to place the solder paste? Once it has parts on it, it
will be hard to use a solder stencil.

Jon
 
Jon Elson wrote...
On Sun, 19 May 2019 01:28:54 -0800, Robert Baer wrote:

I have some generic PCBs that i need to rework by placing
0805 resistors for configuring.

We use adhesive-dispenser for paste (needs shop air),
and a Zephyrtronics hot-air system, air pencil and
under preheat, nice, necessary for super-small stuff.

But 0805 parts are quite easy to do by hand. Remove
quickly with a tong-style talon soldering handle.
To install, place a dot of solder on one pad, hold
the 0805 with curved flat-end tweezer and tack one
end down with your small-tip soldering iron. Then
do the second end, and back to redo the first end.


--
Thanks,
- Win
 
Winfield Hill wrote:
Jon Elson wrote...

On Sun, 19 May 2019 01:28:54 -0800, Robert Baer wrote:

I have some generic PCBs that i need to rework by placing
0805 resistors for configuring.

We use adhesive-dispenser for paste (needs shop air),
and a Zephyrtronics hot-air system, air pencil and
under preheat, nice, necessary for super-small stuff.

But 0805 parts are quite easy to do by hand. Remove
quickly with a tong-style talon soldering handle.
To install, place a dot of solder on one pad, hold
the 0805 with curved flat-end tweezer and tack one
end down with your small-tip soldering iron. Then
do the second end, and back to redo the first end.
Has anyone modified something like the LitePlacer appropriately to do
simple (adding parts) rework?

I have some generic PCBs that i need to rework by placing 0805
resistors for configuring.
 
On 19/05/2019 10:28, Robert Baer wrote:
   I have some generic PCBs that i need to rework by placing 0805
resistors for configuring.
  Seems that a generic PCB heater is needed for 180C preheat (simple),
plus a way to heat the part to be placed, as well as pad areas for
reflow (not easy).

  Soldering schemes i thought of:
   laser to heat and/or spot weld
   IR beam to heat
   focused airflow to heat
   tweezer probes configured for spot welding
   soldering iron
   soldering gun

  Has anyone done this?
  What would it cost to have the LitePlacer appropriately modified?

  Thanks.

No chance, not worth the effort,do it by hand... soldering iron, fine
tip and tweezers.

---
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