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Messages - kenyee

16
Sick of Beige / Re: pulling SVG into inkscape for comparisons?
[quote author="kenyee"]
What I get is what you see below...looks like the interlocking side layers will hit the edges of the board :-([/quote]

After some quality time w/ the ruler tool, I found out that the SoB templates from:
  http://dangerous-prototypes-open-hardwa ... Templates/
are 2mm wider than the ones generated by this plugin.  E.g., for the 60x37, the template is actually 64x41 outer dimensions...makes sense since it's supposed to protect the board.  Center to center of the narrowest holes is 29mm.
When this plugin is used to generate a case w/o sides, it creates a case that's 62x39 (I think arakis mentioned this in the thread a while back so I assumed it was fixed).  Makes more sense to be 62x39 if it goes into the case w/ sides though since you want to minimize internal space.

The EagleUp exported SVG are the wrong size...center-center of the narrowest holes is 29.5mm.  It's scaled a bit off :-P
If you scale the EagleUp exported board by 0.99, it fits properly.

Back to trying to figure out how to export all the sides of the 3D case...can't remember how I exported a single side and it keeps exporting a long tall blank rectangle now :-P
17
Sick of Beige / pulling SVG into inkscape for comparisons?
Has anyone done this to make sure things line up?
What I did was this:
- use eagleup to convert a board into sketchup format
- resize down by 1000
- select the drills layer and export to svg
- open drills layer in inkscape
- import SoB template (60x37) inkscape but it shows up as a small rectangle, so I have to transform/scale the object by 1330%
- align the holes in the SoB template w/ the drills layer holes (still not sure why I had to do the 1330% to get it to fit)
- save top layer of interlocked SoB case as SVG
- import top layer in Inkscape and scale by 1340% to get the holes to line up their centers

What I get is what you see below...looks like the interlocking side layers will hit the edges of the board :-(
18
Sick of Beige / Re: SOB Google Sketchup plugin
[quote author="kenyee"]
But before that, I have to reduce the size by 1000 which I can't figure out how to do do after googling for a while.  Looks like there is a scale tool, but that seems to apply to only one side at a time and you can't set a specific number.  I can't just do "shrink everything by 1000"[/quote]

FYI, to do this, you need to install EagleUp..it contains plugins to change the dimensions by 1000.  Most people will install this to make sure their board fits anyways, but I didn't :)
19
General discussion / ditto 1% SMD resistor/cap sets
It's a PITA finding these on fleabay and they don't have a good selection.  0805 please, though I'm sure you guys are going to do 0603 instead :-)

One other thing I've been having a hard time finding is SMD SPST switches that have collars that can be screwed to the front of a case...or something that lets you connect a board to a case's side so it doesn't move around.  Supergluing it in place doesn't seem like the right way to do it :-P
20
Sick of Beige / Re: SOB CNC Acrylic case
[quote author="diego"]I have renamed SOS Sick of Screws I hate screws Long life to Magnets![/quote]

One nice thing you can do w/ the screws is you can use different sized standoffs.  This helps if you have weird sized connectors, etc.
In the US, we have to order them from china off fleabay because we don't use metric parts here though :-(
21
Sick of Beige / Re: SOB Google Sketchup plugin
Thanks!
And now I get to the next stupid question...anything special to export to SVG so you can send it to Seeed?
Looks like I can right click on each face, then "export to SVG file" and use these same settings?


But before that, I have to reduce the size by 1000 which I can't figure out how to do do after googling for a while.  Looks like there is a scale tool, but that seems to apply to only one side at a time and you can't set a specific number.  I can't just do "shrink everything by 1000"

And to panelize it, you open the SVG files up in Inkscape and do the copy/paste thing to the appropriate size canvas to match what is available at Seeed?
23
Sick of Beige / cutting holes in this 3D case?
ok, this is a bit of a dumb question, but how do you cut holes in sketchup w/ this plugin?

With the regular SickOfBeige templates, everything was 2D, so you basically figure out where to cut a rectangular hole and then draw a rectangle and then do right click erase.
With this 3D one, it looks like when you do that, it only draws on one face.

Would be nice if the plugin had a way to specify cutouts for two sides for big ugly connectors like an RJ11...they're so huge, I want them mostly outside the case :-P  I actually want a notch in two dimensions (top and a side) so the rest of the case can be slimmer.
24
General discussion / Re: Anyone try 3D printed enclosures or low-volume molded on
[quote author="sam512bb"]
On a secondary note, I am simply amazed at how much time and effort I spend looking at off the shelf enclosures for various projects.  I wish I had some extra $$$, as I would just create 3-4 standard enclosure styles and have them all injection molded.  The quality, finish, and fitment of injection mold enclosures cannot really be beat (at its price point and with a well engineered) and the per-unit cost is crazy low.[/quote]

The problem w/ "standard" enclosures is they work fine until you attach any connectors to your board.  I found some decent ones from Serpac, but they had the same issue...they centered the board in the case (making the assumption you were doing thru-hole) instead of offsetting it so you could fit a coin cell holder or DIP socket w/ chip and various connectors on top.

If the Protomold stuff is $5/case, for low volume, 3D printing probably makes more sense as that technology comes down in cost...assuming the printed cases are reasonably sturdy and not easy to squish :-)

Thanks for the ballpark numbers.

 ken
25
General discussion / Re: How important is RoHS/Lead Free with prototype boards
[quote author="Chuckt"]
I was actually reading an article, which I can't find, that said there is actually a lot of lead being put into our environment and a lot of it comes from ammunition or lead fishing weights from fishermen.[/quote]

Actually, that's what people think, but it turns out lead is nearly insoluable in water:
  http://www.lenntech.com/periodic/water/ ... -water.htm
unless you have very acidic water.

Lead ammo is mostly no longer sold, but the problem wasn't the lead in the bullets, it was the lead in the primers that initially ignite the powder:
  http://boards.straightdope.com/sdmb/sho ... p?t=576143

But it's "common sense" that it's bad for birds/fish...as in, it's "intuitively obvious so you don't need to consult a scientist because it 'feels' right".  It's one of those phrases that you should question the media on when you hear it ;-)

For PCB's they probably more concerned w/ manufacturing waste/recycling containing dissolved lead I'd bet...
26
General discussion / Re: Anyone try 3D printed enclosures or low-volume molded on
[quote author="sam512bb"]Good day Kenyee,
Personally I found both methods rather pricey for what they offered and I just went with the injection molding process.
[/quote]

Thanks, Sam.
What was the cost of injection vs. ProtoMold?  I would guess the per unit cost of injection molding beats Protomold's initial costs after a thousand parts?  $1500 for a protomold doesn't seem bad if per unit costs are ok.
27
General discussion / Anyone try 3D printed enclosures or low-volume molded ones?
Curious if anyone has tried doing this yet?
I haven't find any decent tutorials on this or at least anything better than this: http://www.inhale3d.com/2012/12/enclosu ... nt-panels/

Seems like something that belongs in the prototype category because it'd be too expensive to do for anything of more than a few :-)  But it'd be a nice way to check something before looking into molded enclosures...I'm not sure if there is even such a think as a low-volume injection molded enclosure because the mold is expensive ($10K?).
28
Project logs / Re: PAW - TAGINATOR
Just wanted to say thanks, Rick.  Definitely a cool way to use the tag-connect cables.
I've been using the smaller non-legged version....no need for the 4 big leg holes and better for smaller boards.
29
Project logs / thanks sparkybg
I've never heard of that calibration technique.  Thanks :-)
Now I have to get some 63/37 solder but that's cheaper than the calibration device :-)
30
Project logs / calibration?
Any way to calibrate it?

Wish there were an inexpensive calibration for the Hakko irons.  The FX888's calibration system costs as much as the iron :-P