Synthetos

More Enclosures

I have been playing around with creating enclosures for prototyping electronics as of late. Today I took a few hours while my son was napping to create a case for my Arduino Mega that I got recently. The typical wear and tear of breadboarding / protoyping with these cool uC’s can be pretty harsh, also knowing the common state of my workbench (screws, tools etc all in disarray) I find these cases completely necessary.

With the recent number of orders for the Bus Pirate V3 enclosure it seems obvious that I post up these other designs as products also. However, these still have quite a bit more testing and tweaking to go through before they are ready for the synthetos web store.

More pics here:

Tags: arduino, arduino mega, enclosure, laser, laser cut, laser cutting, mega, product, prototype

Mini Proto Desk – For the Arduino

Tags: arduino, laser, laser cut, prototype

How to make an Eagle Solder Mask Stencil for an Laser Cutter

Hide the all of the layers.  Then display only the Dimension and Tcream.  (Note: in the screen shot its the document.. it needs to be Dimension).  Also change the fill style for the cream layer.  It is a “hatch” looking pattern by default.  We want a solid color pattern.  I left the color Grey.  When we print the PDF it will turn it black anyways so it does not matter. Click ok.

Now you need to click Print and then click the PDF button.  This is going to get us a vector format of the stencil.  However, for some weird reason the PDF writer in EAGLE creates some sort of non-standard PDF (not sure exactly).  This does not allow us to just import this into Corel Draw (corel is what the vector cutting drivers work  for the epilog laser cutter).

So scroll down to see the next step.

Now you will need to download Ghostscript and Gview for your platform.  Here is the windows links.
http://mirror.cs.wisc.edu/pub/mirrors/ghost/GPL/gs864/gs864w32.exe – Ghostview
http://mirror.cs.wisc.edu/pub/mirrors/ghost/ghostgum/gsv49w32.exe – Gview (Windows GUI for Ghost Script)

Ok once those are installed go ahead and open Gview and then open the PDF we created above.

Now click File >> Convert.  Select the EPS Write and type in 1200 dpi.  Then click OK and save it. You now have the file you will be loading into the epilog laser cutter.

Open up Corel draw… Ungroup everything (if needed) and check the outside lines for duplicates.. Meaning select a outer line and delete it… If you see another line.. Delete that one until the lines are no more.. Then just undo the last delete.  Why do we do that?  For some reason Ghostscript from time to time adds multiple lines on the outside.. Not sure why.  But if we do not delete them we will have the laser cutter going over everything (at least the outter edges) 2x or 3x.  Ok so you have removed all duplicated lines and now you are ready to select all and make the line width a “hairline” width.  This is something that corel calls it.  This is the #1 reason that you can only use Corel draw to do cuts (vector stuff) with the epilog.  So anyhow.. Now you should print it out.  Setup your desired epilog settings (based on your material) and have at it.

Your done!   (DFX is here: Goodget 2.1 stencil dxf)

Tags: laser, Laser Cutter, laser cutting, pcb, smd, smt, solder mask, soldering, stencil

PCB Cyborg Art

So I had some free time while waiting for Alden to proof my xproto breakout board I designed for the tinyG system that we are working on.  So I took some time to try to mimic the results that Joe Grand of Grand Idea Studios did on his professional PCB mill.  I think the results were pretty good.  In fact they were even better than you see on the final version.  I say this because currently I have a very coarse wire brush on my grinder and did not take the time to switch it to a much finer wire gauge.  I was lazy.  As you can see some of the building is coming off.

Also in the middle there was some “over burn” where I left it in contact too long.

This has kind of inspired me to do some neat graphic / electronics.  Not sure what I am going to do but this would have been much cooler if the cyborg’s eye lit up and would blink faster / slower based off of the temp in the room etc…

Tags: art, defcon, etching, laser, pcb

Laser Cut End Mill Holder

As you know I recently purchased a milling machined to be able to do some custom PCB stuff along with some intro level metal working.  Well today I thought that I would try to create a collet holder that would have its sizes clearly visible.  However being short on time and on a break from some “real” work I made an end mill holder for my 10 piece set from grizzly instead.

I am using a method that I invented I termed:  Self threading square tube insert method. Whats so cool about this is it combines fairly easy cuts of aluminum that pretty much anyone can do with a band saw, hand saw or rusty pocket knife… Well not the last one and I don’t suggest you try it.  But is very cool.  Basically its all in the spacing of the 4 holes that were laser cut that the aluminum sits below.  Its a very tight squeeze which allows the screws to “self thread” inside the square tube’s inside.  Hence the name.  Not super witty but it describes it nicely.   Comments, questions or concerns always welcome.  Next thing to make is the collet holder.

Here is the final results:
http://www.thingiverse.com/thing:1393

Thingiverse Links as always here:
http://www.thingiverse.com/thing:1393

Tags: DIY, end mill, laser, Laser Cutter, Metal Working, mill, useful

Rack and Pinion Attempts…

My first attempt at a rack for a rack and pinion setup on the laser cutter.. All by hand in sketchup.. not super great so far but getting close… Once more unto the breach..

Tags: laser, laser cut, Laser Cutter, laser cutting, lasercutter, pinion, plexi, plexiglass, rack, rack and pinion

New Contraptor Fabricated Parts

Over the weekend I created some new parts to add to the Contraptor.org project that I am working on.  You can see them here: and here:

Tags: CNC, Contraptor, laser, Laser Cutter, open source hardware