Electronics Forum | Thu Dec 18 14:38:58 EST 2014 | rangarajd
Hello, I don't have any experience with Juki. Visited one of their booth recently and I was told they use a laser for alignment. How does this work? Is there any advantage over the traditional vision alignment? Thanks!
Electronics Forum | Fri Dec 19 12:43:01 EST 2014 | emeto
I had some of these before and they do a decent job. Laser alignment is ok for passive components. Compared to vision systems it has mainly disadvantages. If you have bended lead on IC for example, it wouldn;t catch it and it will place the part. I w
Electronics Forum | Sun Dec 21 23:30:09 EST 2014 | sarason
Since the Laser alignment bit is attached to the head and you don't have to move the part to a camera location, before placing the component on the board it is about the fastest method there is of getting accurate component alignment. With more moder
Electronics Forum | Tue Jan 03 03:01:35 EST 2006 | Frank
The 740 and 760 basically have the same specs as far as component ranges: 0402-50mm components. The 760 is a bit more accurate and the vision system is better. The 740 was designed when BGA weren't really around and so it can barely vision center b
Electronics Forum | Tue May 14 02:01:56 EDT 2013 | leeg
We are having numerous issues placing BGA and IC's on a Juki 750 using laser, the machine has been recently calibrated but we are getting twist and misplacement quite often, any ideas?
Electronics Forum | Wed May 15 08:25:38 EDT 2013 | emeto
Absolutely! I would say go even 0.5 to be safe.
Electronics Forum | Tue May 14 14:15:41 EDT 2013 | leeg
Thanks Evtimov. We have a 750 with no camera so unfortunately have to use laser. Also is there ever a need to manually alter the laser height for a component ?
Electronics Forum | Wed May 15 05:31:53 EDT 2013 | jlawson
Also make sure nozzle retraction is ok, if nozzle shafts stick at different heights can effect laser centering stability.
Electronics Forum | Tue May 14 16:23:12 EDT 2013 | emeto
Hi again, yes you have to pick the laser level sometimes. The machine will put some default level based on the component dimensions, which sometimes will be wrong for your part. Unfortunately it has been awhile since I worked with Juki so I can't te
Electronics Forum | Tue May 14 16:59:24 EDT 2013 | leeg
Cheers again. So if the bga is 1mm thick and with the balls 1.3 mm thick I should set the component height at 0.9 to be sure of cotrectly centering on the body ?
