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
Gast
#4021894
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
Can the device also apply cream on the board?
Julian Baugatz schrieb: > Can the device also apply cream on the board? He meant paste.
Gast
#4022519
No. (Stencils are cheap and trivially easy to use, and allow for much more precise control of paste amount.)
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...
Gast
#4025194
Very soon these can be placed with some user assistance. Please see http://www.liteplacer.com/phpBB/viewtopic.php?f=12&t=15
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.
Gast
#4026343
> 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.
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