Electronics Forum | Sat Sep 09 10:19:36 EDT 2000 | Adam
Guys A very concerned engineer. Just been called over look at some PCB's in our diag area for missing components(0603).Too my shock I have just found that these components can be picked off just using a finger and applying some pressure. And apparen
Electronics Forum | Tue Jul 12 10:40:27 EDT 2016 | leeg
Brad, have you got any calibration jigs with the machine? This could also be down to laser offset or laser scaling which are both calibrated with different jigs. Where are you based?
Electronics Forum | Tue Jul 12 10:41:35 EDT 2016 | bradholland
oh i did not enter the pcb thickness. it is set to 0.0 I thought this was only to be changed for non standard pcb thicknesses. So, with the pcb being 1.6mm this is probably the answer. I guess this means I'm dumb..
Electronics Forum | Tue Jul 12 10:45:45 EDT 2016 | bradholland
I didn't get any jigs, no. I am based in florida!
Electronics Forum | Sun Jul 10 15:29:56 EDT 2016 | bradholland
hi everyone, new user and noob here. I've spent the last week getting acquainted with my juki 740, being totally new to placement etc it's been fun to learn! I've now gotten to a stage where everything is setup in the machine for my board and is p
Electronics Forum | Mon Jul 11 10:48:48 EDT 2016 | mnorthey
I have experienced this problem on a number of different machines and have found that it has been one bad nozzle causing the problem. We run Juki 3010 and 3020 and occasionally we have had similar problems. One question, is it bad placements on all 6
Electronics Forum | Mon Jul 11 10:59:50 EDT 2016 | mnorthey
Other problems on previous machines that we have experienced is that there was not enough board support under the panel or that the panel thickness was inaccurate. Both situations can cause parts to bounce off the PCB or not to be pushed into the pas
Electronics Forum | Mon Jul 11 13:21:40 EDT 2016 | bradholland
well there you go. I found that trying different values in the "Placing Stroke" had a big effect. I changed it to 2mm and it placed them well, but I could see the board also flexing a little, went to 1mm and the problem came back, so have sat in th
Electronics Forum | Tue Jul 12 10:33:24 EDT 2016 | dontfeedphils
I'd start by checking and reteaching the nozzles (this is automatic, it'll measure the nozzle length and vacuum values for each nozzle). After that double check the value you have entered for the PCB thickness as this will impact where the machine t
Electronics Forum | Mon Jul 11 07:40:11 EDT 2016 | spoiltforchoice
I don't know your machine but you are looking at the most likely areas. Some machines define a placement pressure, other may define an overtravel to make sure the device is firmly placed on the board. There are usually also timings for when the vacuu
