Loading

Open Pick-N-Place Tape Feeder

by Erik, published

Open Pick-N-Place Tape Feeder by Erik Mar 24, 2011

Featured Thing!

Description

The files have been moved to YouMagine, a really nice place to share your 3D designs! They can be found here:
----------
youmagine.com/designs/open-pick-n-place-tape-feeder
----------
This is part of my efforts to automate assembly of PCBs, using an existing 3D printer with a pick-and-place toolhead instead of acquiring a 40K euro machine. This is a parametric design that can be easily adjusted for various sizes of SMD tape. The gear will also be adjusted depending on the pitch of the tape and components.

A tape feeder like this can cost about 1 euro instead of 200 euro's.

Like most of my design, it was designed in OpenSCAD, openSCAD.org a wonderful tool, especially if you're more of a TUI person than a GUI person.

Personally, I really like the recursion that you can print and cut these parts on open source machines and that they will allow you to automatically assemble the PCBs for 3D printers and laser cutters. Also, the laser cutter can be open source, which is what our friends in Utrecht are working on: see laoslaser.org/

Video: youtube.com/watch?v=fsWpC6L91qo

Derivatives, additions, improvements and suggestions may also be prized as part of the Ultimaker challenge:
Ultimaker.com/Challenge !

Recent Comments

view all

very cool model. One suggestion though, if you want to keep cost to a minimum, then surely using a spring+solenoid to drive this would be cheaper (1 transistor to control). Also if you had a takeup wheel for the excess covering film you could ratchet that off of the same mechanism, so cost would only be an extra plastic part, and a maybe cf spring if you need some compliance.

THANKS!!!!!!!!

- buffering the membrane pump somehow. Any ideas?

Use a membrane pump which blows air OUT, put it in a sealed plastic box, and you'll get a "large amount of under-pressure" which should draw air in more smoothly.

Haven't tried it, tho...

Makes

Liked By

view all

License

GNU - GPL
Open Pick-N-Place Tape Feeder by Erik is licensed under the GNU - GPL license.

Give a Shout Out

If you print this Thing and display it in public proudly give attribution by printing and displaying this tag. Print Thing Tag

Instructions

0. See the video for more instructions.
1. Adjust the parts in openSCAD to fit your tape. Export them to STLs.
2. Print the STL files.
3. Assemble them and ensure that it slides well. The gear, lever and the tape holder have a tight M3 bore.
4. It's better to print it a little too narrow and use a little file to get the exact tolerance you need.
5. Laser cut the gear from POM Delrin (tm).
6. Write control and computer vision software :)

Comments

You must be logged in to post a comment.

tom on Jun 14, 2011 said:

very cool model. One suggestion though, if you want to keep cost to a minimum, then surely using a spring+solenoid to drive this would be cheaper (1 transistor to control). Also if you had a takeup wheel for the excess covering film you could ratchet that off of the same mechanism, so cost would only be an extra plastic part, and a maybe cf spring if you need some compliance.

deviker on Jun 5, 2011 said:

THANKS!!!!!!!!

ccotter247 on Mar 27, 2011 said:

Could you measure the minimum and maximum angles required for dispensing a new part and upload the animation as a scad file I'm writing some code. I would like to participate in this project more. :)

Erik on Mar 27, 2011 said:

In principle I would like to support any degree, it wouldn't be too difficult, we just need a tip controlled by a servo or stepper motor. Since most RepRap boards have a 4 or 5 axis stepper board anyway, this shouldn't be a problem. Only the relative angle is important, we don't need to home the suction tip as it's round.

What kind of animation do you want? This is just one part of the puzzle, there are some picking tools designed already, though not many of there are printable designs. I haven't made a picking tool design, but I have a non-rotating vacuum tip at the moment that already works for simple parts.

Erik on Mar 25, 2011 said:

I'm also still looking for an affordable way to detect a change in pressure, to find out whether a part was grabbed or not. Perhaps something capacitive or some other effect might also allow you to detect this, so that's an option too. Any comments are welcome.

Anonymous on Mar 25, 2011 said:

A light sensor that gets obscured with the grabbing of a part would be another way to do it. This could also tell you when the part has been released or dropped prematurely.

macegr on Mar 24, 2011 said:

This is very good...but the lower ratchet mechanism will be putting a lot of stress on the fragile wheel nubs...rubbing across the tops, then pushing on the side. I think maybe a second set of stronger nubs should be considered, or maybe design a wheel where the nubs can just be some pins or small brads pushed into the edge of the wheel.

Erik on Mar 24, 2011 said:

I was worried about this, but POM is very durable in general. I will see how it goes. I want them to last at least as long as a full reel, or 4000 components placed. I can test it with out the tape and run it 10000 cycles. The three holes were meant for aligning a second piece of POM that has a smoother profile. I will definitely pursue this if wear becomes a problem.

Other issues I'd love some ideas on:
I've actually placed a few components with an Ultimaker running hand-coded GCode and a using a vacuum membrane pump for the head (a syringe needle). The pump's flow, however, oscillates too much. It tends to push away parts sometimes, when they're not fully pi
cked up yet. I'm looking into the following options:
- venturi (aspirator): using an air pressure source and a T-junction, this seems to work.
- two mechanically coupled pistons, one that is driven by a flow, the other is pulled outward to create a vacuum (this is not continous, problematic)
- buffe
ring the membrane pump somehow. Any ideas?
- some other off-the-shelf pump that doesn't oscillate? Or one with multiple pumping blades.

I'm also deciding on how to achieve accurate positioning. I guess I could use the SMT tape itself as a centering pit. Similar to this:
http://www.ciciora.com/pickn
place.html

kitsu on Mar 24, 2011 said:

Cool idea!

This could also be useful as a hand tool when hand-soldering smt parts... The hardest part for me is usually getting the parts off the tape without losing them =-O

Top