Where to buy reflow kit - Page 1
Forum section: electronics / general

author: lawrence11
author_rank: Frequent Contributor
timestamp: July 27, 2019, 03:42:37 am
content: Hello, I just finished building my whizoo v3.Now I need the tweezer and syringe kit. with epoxy needles.The usual suspects for double sided reflow.Where to buy such a kit

author: mrpackethead
author_rank: Super Contributor
timestamp: July 28, 2019, 09:23:56 am
content: What do you need epoxy for?you dont' need to glue the parts down for double sided.

author: lawrence11
author_rank: Frequent Contributor
timestamp: July 28, 2019, 03:52:23 pm
content: What makes you think I got all small parts underneath?I dont care if I need or not, I'll find out and ship it all in a box.

author: jmelson
author_rank: Super Contributor
timestamp: July 28, 2019, 08:47:01 pm
content: Quote from: lawrence11 on July 28, 2019, 03:52:23 pmI regularly do a board that has a TO220-sized switching regulator on the back side. I have a P&P machine, and could never arrange to handle the board gently enough so that parts didn't get disturbed -- didn't even try that. So, I apply paste, place and reflow the back side first, then repeat for the top side, and reflow again. Never had any problem, even with the regulator chip, when reflowing the top side.Jon

author: mrpackethead
author_rank: Super Contributor
timestamp: July 29, 2019, 03:19:54 am
content: Quote from: lawrence11 on July 28, 2019, 03:52:23 pmNot quite sure if i understood correctly. Are you going to paste/place/reflow the bottom, then paste/place/reflow the top. ( 2 passes? ), or were you trying to do one re flow pass? I can't imagine trying to do a single re flow pass for double sided. I'd like to know how to do it, if it can be done.General rule of thumb is that you can you dont' need to use adhesives for the 2nd side, until you exceed 0.05g/mm2 (component weight / pads covered with solder paste ). The surface tension of the solder paste will hold parts on the bottom in place when its re flowed.I only have a couple of parts that exceed, this, a large SMT Inductor... and i just make sure that i have it on the top. If i can, i design boards now to be single sided, but thats not always an option. the cost associated with a 2nd reflow pass, is signifincatly higher than a potentially bigger board. That being said, sometimes thats simply not an option.If you really need to glue your parts.. 'Red Dot Glue'.

author: Bassman59
author_rank: Super Contributor
timestamp: July 29, 2019, 11:23:39 pm
content: Quote from: lawrence11 on July 27, 2019, 03:42:37 amPlease report back after you've run a few boards. I keep looking at the Controleo and kit but haven't bought it yet.

author: CoolNamesAllTaken
author_rank: Contributor
timestamp: July 30, 2019, 07:56:50 pm
content: I have a Controleo 3 and it's much better than the T-962 I use at work. Can't recommend it enough!I've done a number of double-sided reflows by reflowing the bottom components first, then applying paste and components to the other side and reflowing again. As long as the heaviest components are added to the second side so they stay on top, things tend to turn out just fine.

author: lawrence11
author_rank: Frequent Contributor
timestamp: July 30, 2019, 08:12:32 pm
content: I have not tried yet on a board, so far its not caught fire.But I can confirm that its pretty dummy proof, the guide could be even more noob friendly tho.Not the prettiest, but it works just fine from the looks of it.