Building a SMT Pick-and-Place Buddy

RE: Building a SMT Pick-and-Place Buddy

raghav2450 — Sat, 20 Oct 2018 02:30:02 GMT

this is a really excellent article loaded with some great tips.

Although I would have loved to have this article on my blog .

Best wishes, from http://smtinsight.com

RE: Building a SMT Pick-and-Place Buddy

mcb1 — Sun, 18 Dec 2016 07:41:56 GMT

I've been holding this one in my inbox due to other committments.

It's a great idea and implementation.

I agree with John about isolating the pump. The fact you can put it on a rug and the noise is reduced, suggests it is being transferred and therefore isolation will help.

re the LED.

Have you considered using a fibre optic.

These are available in solid plastic and in different sizes.

I'm sure you can integrate it into the tube and seal the entry/exit, or simply add the LED inside a vaccum reservoir/filter.

It also means you have many more options for the LED sizing.

Mark

RE: Building a SMT Pick-and-Place Buddy

jw0752 — Thu, 08 Dec 2016 05:40:06 GMT

Ever since Shabaz built this awesome project I have been thinking of how I could build a simpler but functional unit that would suit my own needs. Today I finally got the parts together and patched together my first crude prototype. I began with a small 3 way push button pneumatic valve. I have put a 1/2 watt resistor in the picture for size comparison. The valve connects the center port with the port on the right end when the button is not pushed and connects the center port to the port on the left when the button is pushed. My approach to using this valve will be to use a fairly high vacuum on the left most port. The vacuum tweezers tip will be attached to the center port. The port on the right will be left open to the ambient air pressure. We will minimize the length and diameter of the hose that goes to the tip so that the volume of space that is under vacuum will be minimal as well. The tip is made from a copper pipe that is used in a refrigeration unit to produce back pressure so it too has a very small diameter. This will allow air pressure to quickly neutralize the vacuum when the push button valve is released.

[View:/resized-image/__size/620x465/__key/commentfiles/f7d226abd59f475c9d224a79e3f0ec07-fdc2538a-d1e2-4634-95bf-ab45cac463fd/8562.contentimage_5F00_182810.jpg:620:465]

For a gun I have found an old dental fiber optic cure light and removed the guts. Here is a before and after picture:

[View:/resized-image/__size/620x465/__key/commentfiles/f7d226abd59f475c9d224a79e3f0ec07-fdc2538a-d1e2-4634-95bf-ab45cac463fd/8176.contentimage_5F00_182811.jpg:620:465]

[View:/resized-image/__size/620x465/__key/commentfiles/f7d226abd59f475c9d224a79e3f0ec07-fdc2538a-d1e2-4634-95bf-ab45cac463fd/5023.contentimage_5F00_182812.jpg:620:465]

Here is a picture of the components assembled in a half shell of the gun. The tip has been temporarily mounted through corks as I wanted to be able to pivot it from side to side. The routing of the hose is from the tip to the center barb of the valve and then from the top barb of the valve to the externally supplied vacuum. I am using the same external vacuum pump for this project that I made out of an old dehumidifier and which I also use for the desoldering station. It is quiet like a refrigerator and yet produces 630 mm of Hg vacuum level.

[View:/resized-image/__size/620x465/__key/commentfiles/f7d226abd59f475c9d224a79e3f0ec07-fdc2538a-d1e2-4634-95bf-ab45cac463fd/5751.contentimage_5F00_182813.jpg:620:465]

Here is a picture of the assembled gun.

[View:/resized-image/__size/620x465/__key/commentfiles/f7d226abd59f475c9d224a79e3f0ec07-fdc2538a-d1e2-4634-95bf-ab45cac463fd/3617.contentimage_5F00_182814.jpg:620:465]

I have made a short video of this vacuum tweezers in action.

[View:https://players.brightcove.net/1362235890001/NkxiVJdjx_default/index.html?videoId=5239718089001:740:466]

The battery that I picked up is an LR44 and weighs 2 grams. The other pieces were surface mount caps. Now that I have the vacuum part working I will see if I can install a fiber optic light. This should not be too much trouble as there are many variations used in the dental trade to illuminate the dental drills that are used in patient's mouths. When I have a finished unit I will post information on what I did and a short video.

Thanks again to [mention:b0bc65b9ecdc4307bd967592f00e340a:e9ed411860ed4f2ba0265705b8793d05] for his continuing inspiration to all of us.

John

RE: Building a SMT Pick-and-Place Buddy

rachaelp — Wed, 07 Dec 2016 22:08:04 GMT

Hi Shabaz,

I've just stumbled across this and found it really interesting as I have a stack of parts currently sitting on by lab bench to build just such an item myself! My design is very similar so I'll no doubt be referring to this blog post as I build it up and try to get it going [View:/resized-image/__size/16x16/__key/commentfiles/f7d226abd59f475c9d224a79e3f0ec07-fdc2538a-d1e2-4634-95bf-ab45cac463fd/contentimage_5F00_1.png:16:16]

Best Regards,

Rachael

RE: Building a SMT Pick-and-Place Buddy

jw0752 — Fri, 25 Nov 2016 07:36:29 GMT

Hi Shabaz,

This is a beautiful project and well thought out. I particularly thought that Mr. Sneeze was an excellent solution to quickly equalize the negative pressure in your handpiece line. In some dental equipment I have seen high vibration motors and pumps suspended on rubber straps. Think of a small bread pan with rubber bands connected to the sides and the pump suspended inside the pan on the rubber bands. I have also seen high vibration motors suspended on coil springs with grommets and guide pins to keep the motor platform properly positioned over the springs. You may also need to go to a silicone vacuum line from the pump so that vibration isn't transferred as much through the pneumatic lines. Great build!

John

RE: Building a SMT Pick-and-Place Buddy

gihu — Thu, 24 Nov 2016 09:50:48 GMT

Hi,

After spends some days without watching a post, it is quite complex for me to find it... Maybe there is a simple way that I do not know... [View:/resized-image/__size/16x16/__key/commentfiles/f7d226abd59f475c9d224a79e3f0ec07-fdc2538a-d1e2-4634-95bf-ab45cac463fd/contentimage_5F00_2.png:16:16]

[mention:b0bc65b9ecdc4307bd967592f00e340a:e9ed411860ed4f2ba0265705b8793d05] Do you think is it worthy make the hand-tool with FreeCAD? Maybe later someone can print and test it. I have never used FreeCAD but, it seems quite similar to solidworks.

RE: Building a SMT Pick-and-Place Buddy

gihu — Fri, 11 Nov 2016 18:09:05 GMT

Hi [mention:b0bc65b9ecdc4307bd967592f00e340a:e9ed411860ed4f2ba0265705b8793d05],

Really nice project!! If there is anything I can collaborate with, let me know [View:/resized-image/__size/16x16/__key/commentfiles/f7d226abd59f475c9d224a79e3f0ec07-fdc2538a-d1e2-4634-95bf-ab45cac463fd/contentimage_5F00_3.png:16:16].

P.S.: I tryed to rate the document, but I can't, and don't know why