Liteplacer - kennt das jemand?

[Max G. (l0wside)]

Beim Stöbern im EEVblog-Forum bin ich über das hier gestolpert:
http://www.liteplacer.com

Sieht ganz nett aus, ähnelt gefühlt den Varioplace. Leider wohl auch im 
Projektstatus, momentan geht auch nur "Preorder", was auch immer das 
heißen soll.

Kennt das jemand?

Max

[Juha Kuusama (Gast)]

Hi Max,

Sorry for using English, I can't do German. I'm Juha Kuusama, the 
project designer.

> "Preorder", was auch immer das heißen soll.

If Google translated the question right, the answer is: Deliveries 
starting in mid-March, pre-ordering now reserves a kit from the first 
patch.

Best regards,

Juha

[Julian B. (julinho)]

Can the device also apply cream on the board?

[Einhart P. (einhart)]

Julian Baugatz schrieb:
> Can the device also apply cream on the board?

He meant paste.

[Juha Kuusama (Gast)]

No.

(Stencils are cheap and trivially easy to use, and allow for much more 
precise control of paste amount.)

[Jens B. (fernostler)]

Can the machine do larger ICs, QFP etc?

And how about ICs with 'from top invisible' pins, like DQFN etc.?  Or 
BGA...?

Kiitos in advance...

[Juha Kuusama (Gast)]

Very soon these can be placed with some user assistance. Please see
http://www.liteplacer.com/phpBB/viewtopic.php?f=12&t=15

[Max G. (l0wside)]

Juha Kuusama schrieb:
> Sorry for using English, I can't do German. I'm Juha Kuusama, the
> project designer.

Hello Juha,

thank you for your feedback. It is all the more appreciated as there are 
several such projects around, but either without any known schedule 
(Varioplacer) or purely DIY and also still in progress 
(https://www.vbesmens.de/en/pick-and-place.html). The low-cost Chinese 
machines (TM220, TM240) do not have vision, so in my understanding the 
minimum size is 0603 and 0.5mm pitch.

If I look at your video at hackaday, however, I am not sure that you 
will succeed placing 0.5mm pitch components. Take the placement of R4 at 
3:30. The 0402 is off by about 1/4 of its width, which is about 0.1mm. 
This is not bad, is this already the maximum tolerance?

Regards,

Max

P.S.: It might take a while until you have me as a customer - some other 
toys will come first, like a DS815-TG. Sorry.

[Juha Kuusama (Gast)]

> about 0.1mm. This is not bad, is this already the maximum tolerance?

About that. Also, passives are somewhat loose in their pockets, some 
brands more so than others. There is no correction for that, other than 
the automatic re-alignment during reflow.

(I'm not sure about the true maximum tolerance, as I don't really know 
how to measure and specify it. The 0.1 error is typical worst case I'm 
seeing in placement.)

> I am not sure that you will succeed placing 0.5mm pitch components.

Automatically, I'm not that sure myself. However, this is a prototype 
building tool, and I am very sure about success with some operator 
help.

Please see http://www.liteplacer.com/phpBB/viewtopic.php?f=12&t=15 for 
longer discussion. A summary: Technically, the problem is locating the 
part; the machine knows very well where the pickup needle and camera 
image is. There is two workable solutions:

1) Jig placed placement: Place the part in a corner. With a table of 
part sizes, the machine now know the exact location of the part.

2) When pickign it up, the camera takes a snapshot of the part. Machine 
places the snapshot image to approximately right location, the user 
makes fine-tuning, if necessary. I have done some work towards this. 
Obviously the snapshot image quality needs enhancement, but this image 
tells the idea: http://www.liteplacer.com/images/snapshot.jpg

the latter should work nicely with BGAs as well using the up looking 
camera.