Stencil Printer  - PUHUI High Precision Printer Manual Stencil Printer machine - Page 1
Forum section: electronics / general

author: mrpackethead
author_rank: Super Contributor
timestamp: September 16, 2016, 08:41:30 pm
content: My other purchase this week, a manual stencil printer..https://www.aliexpress.com/snapshot/8046382212.html?orderId=77873127059921This got my attention, and i thought it might do the job.. Ordered it and a week later it arrived, so the vendor is ok.It arrived, super well packed. The only problme is that you need to be really careful to find all the parts among the packing. I had to go to my wheelie bin, to find a couple of thigns, which sure enough were left in the packing. It comes mostly assembled, though there are a few bits to attach ( handles, the arm etc ).. The instructions that came with it, we well... lacking, but there are some diagrams and i was able to work it out ok. Its resoanbly well made, i dont' like the knurled alumimum handles, they are pretty rough on your hands.. The X/Y part of the table worked well out of the box, the C ( rotation ) did'tn.. it would only rotate 0-30 dgrees arther than -30 to 30 degrees. I found that the spring that holds that part togehter was way too loose, so just tweaked that up. ( though this needed quite a big pull apart to get to it ).. I've compromised and now have about -15 to 20 rotation, which is plenty away.It took some time to get the heights all aligned, ( there are a bunch of set screws ).. it took me a couple of hours to get it all really nicely lined up. If you want good stencils then its worth the effort..it has a set of board clamps with it, with a variety of tools, however they are odd diamaters, maybe imprerial sizes.. ( not the 2/3/4mm tool holes i normally use ).. Not a big deal, i'll get some made up this week for a better fit.Anyway, i stenciled 10 boards and got really nice repeatable results and after i'd aligned up the first one, it stayed nicely in positon for all the boards.Good value for money in this.. A few little thigns that could do with tidying up.. but a nice $500 solution ( including airfreight ).

author: Quiggers
author_rank: Contributor
timestamp: September 21, 2016, 02:31:25 pm
content: Is this for creating stencils or for applying paste to pcbs through an existing stencil?Slightly confused.

author: ebclr
author_rank: Super Contributor
timestamp: September 21, 2016, 03:14:11 pm
content: It's to print solder paste, not to printer stencil

author: wraper
author_rank: Unknown
timestamp: September 21, 2016, 04:52:13 pm
content: What was the smallest pin pitch you used it with?

author: mrpackethead
author_rank: Super Contributor
timestamp: September 21, 2016, 11:10:34 pm
content: Quote from: wraper on September 21, 2016, 04:52:13 pmDid .4mm TQFP's and .4mm DFN's, 402's and SC70's no problem at all. The pin pitch is much more of funcuton of your stencil than the printer.. And i'm using Henkel GC10 paste.It works a treat.

author: wraper
author_rank: Unknown
timestamp: September 22, 2016, 12:46:43 am
content: Quote from: mrpackethead on September 21, 2016, 11:10:34 pmNot really. Without a good printer it's very difficult to get repeatable results.

author: mrpackethead
author_rank: Super Contributor
timestamp: September 22, 2016, 08:44:51 am
content: And oeprator skill and practice. Having a pile of junk does'tn help!Its a combination of things.

author: wraper
author_rank: Unknown
timestamp: September 22, 2016, 11:33:04 am
content: The issue with cheap stencil printers is that stencil can move a little bit, say 0.2 - 0.3 mm, and paste gets applied not on the small pin pitch pads but between them. Also it's important that stencil doesn't move horizontally while you lift it from the board, otherwise paste will be smeared.