Mydata MY100 Placement Force Feedback. - Page 1
Forum section: electronics / general

author: Kiwi
author_rank: Newbie
timestamp: August 18, 2021, 12:38:55 pm
content: Hello.I am working on a product that contains a lot of components having flat no-leads packages, such as QFN, DFN, etc. (https://en.wikipedia.org/wiki/Flat_no-leads_package), with 0.2mm wide pads and 0.4mm pitch. At the same time, I am trying to select an appropriate pick-and-place machine that will reliably place these packages. The concern is that solder paste will be pushed off the pads and cause bridges if, due to height variations associated with PCB flex etc., components are pressed too hard into the solder paste. Due to high feeder count and secondhand availability, pick-and-place machine investigations have led to Mydata MY100. Consequently, I would like to know whether the MY100 uses Placement Force Feedback to prevent such bridges occurring?Thank you.

author: SMTech
author_rank: Frequent Contributor
timestamp: August 18, 2021, 12:50:14 pm
content: From my quotes back when that was a current machine is this from a document called "General description of MyData equipment V4"QuoteSo yes it does, it is a feature that seems to be missing on mid-entry level machines of the more standard "volume" type from Hanwha, Yamaha etc but is notably present on both MyData and Europlacer machines who have such a big focus on high mix where you might reasonably have new parts with the wrong defined height or an odd shaped board with some tricky warping. Its not on Essemtec and sometimes it bugs me although I don't think its ever caused an issue for the reason you or Mydata give.

author: kylehunter
author_rank: Regular Contributor
timestamp: August 18, 2021, 03:26:09 pm
content: Quote from: SMTech on August 18, 2021, 12:50:14 pmThat quote/reasoning from MyCronic is really funny. I can think of plenty of reasons I wish our Assembleon machine had force feedback, that certainly wouldn't be one of them lol!

author: Kiwi
author_rank: Newbie
timestamp: August 19, 2021, 12:40:44 am
content: Quote from: SMTech on August 18, 2021, 12:50:14 pmThanks for that SMTech.I haven't found the "General description of MyData equipment V4" document via an internet search. Do you happen to have it on file? If so, can you please attach / forward?Also, out of interest, if you don't see issues for the reason I or Mydata gave, what issues do you see from a lack of 'Placement Force Feedback' feature?

author: Kiwi
author_rank: Newbie
timestamp: August 19, 2021, 12:43:27 am
content: Quote from: kylehunter on August 18, 2021, 03:26:09 pmThanks for your input Kyle.Can you please describe issues you see from not having the 'Placement Force Feedback' feature?

author: SMTech
author_rank: Frequent Contributor
timestamp: August 19, 2021, 07:33:53 am
content: I hinted at where I see it missing, its when the height of the device or the surface of the board is not exactly flat or as programmed. When you are running high mix and seeing new parts all the time you don't always get the double check every single data sheet for minutiae, indeed sometimes its nigh on impossible. When these issues crop up a device gets dropped onto the board inaccurately or slammed down hard. Europlacer used to have a great video on YouTube where they placed parts on 3 boards overlapping - so very very uneven, and it just works. Likewise I would imagine if you were doing package on package force feedback would be useful too and you don't want the bottom device to move by getting slammed by the next one. However at the finest pitch QFN we place (0.4mm) I've certainly not seen an issue with shorts or solder balls caused by excess force.

author: kylehunter
author_rank: Regular Contributor
timestamp: August 19, 2021, 10:56:50 am
content: Quote from: Kiwi on August 19, 2021, 12:43:27 amYeah, exactly what SMTech mentioned. Another time is when the pick height in the carrier tape is wrong. We've spent many of hours troubleshooting pick errors only to find that the nozzle was only lowering ~ 0.5mmabovethe component when picking. The vacuum would often still "suck" up the part, but other times it wouldn't. Having the force feedback (if on the pick action) would be amazing to avoid this issue.

author: Kiwi
author_rank: Newbie
timestamp: August 19, 2021, 12:34:49 pm
content: Quote from: SMTech on August 19, 2021, 07:33:53 amThanks again SMTech; information and document are both very helpful.I saw the 'e' version referenced in 'General description of MyData equipment V4' and wondered whether this applied to the MY100 prior to 'e'; I think the MY100LX, MY100SX, and MY100DX were manufactured between 2008 and 2011 and MY100LXe, MY100SXe, and MY100DXe between 2012 and 2014, prior to the release of the MY200 in 2015. The earlier model specifications, found online, refer to 'ISIC'.

author: Kiwi
author_rank: Newbie
timestamp: August 19, 2021, 12:40:21 pm
content: Quote from: kylehunter on August 19, 2021, 10:56:50 amThanks for that Kyle. I don't know whether the feature applies on the pick action but, as you point out, that would be really useful.