Disqus - Latest Comments for jcdoll

Re: Search Isn’t Solved (Yet)

jcdoll — Wed, 31 Dec 2014 13:41:29 -0000

Disclaimer:
Aaron appears to be employed by Component Search.
https://disqus.com/by/aaron...

Re: Mini Kossel zprobe clamp by jcdoll - Thingiverse

jcdoll — Mon, 14 Jul 2014 01:06:42 -0000

Ah, that makes more sense - I just uploaded it, enjoy! :)

Re: Mini Kossel zprobe clamp by jcdoll - Thingiverse

jcdoll — Sun, 13 Jul 2014 19:45:02 -0000

It's an scad file that has parameters. Latest scad is in my repo, see the thing info page. The locknut is not printed, so not part of the STL - just a nyloc nut. I'm going to remove the scad from the thing files (which tend to get out of date) and make the info page clearer for interested users. Thanks!

Re: Mini Kossel groove mount by jcdoll - Thingiverse

jcdoll — Mon, 18 Nov 2013 02:12:58 -0000

I haven't had any problems over the last ~5 months with a PLA mount + 40mm fan. I only print PLA and have the hotend set to ~205C.

Re: s-caribiner by briscoe28 - Thingiverse

jcdoll — Tue, 12 Nov 2013 23:35:03 -0000

Awesome. Printed it out at 1.5x scale and very solid, going to use a few around the house. Not sure what the comments below are going on about besides trolling.

Re: Mini Kossel 40mm fan mount by jcdoll - Thingiverse

jcdoll — Fri, 19 Jul 2013 00:42:44 -0000

Thanks for the feedback. I guess I take my heated bed + hair spray adhesion for granted and print crazy things. Let me know how it works over the long run.

Re: Mini Kossel groove mount by jcdoll - Thingiverse

jcdoll — Mon, 15 Jul 2013 01:01:01 -0000

it's in openscad, so can be customized based upon the particulars of your mini kossel build.

i haven't printed goopyplastics so can't comment on dimension differences - the derivation is conceptual.

(this will only useful to you if you're building a mini kossel or other delta printer)

Re: Printing printers

jcdoll — Wed, 03 Jul 2013 20:26:59 -0000

Yeah, you would love it. I like the "light at the end of the thesis" idea - it's probably not a good plan to get one while you're in the fab or writing if you want to finish. :)

Besides the awesomeness factor, you can totally justify it for fixing things around the house. I printed this to fix a wobbling chair: http://www.thingiverse.com/...

Re: Mini Kossel groove mount by jcdoll - Thingiverse

jcdoll — Sun, 23 Jun 2013 23:52:32 -0000

Thank you for your deep insight Tom, I had no idea! :p

Re:

jcdoll — Tue, 18 Jun 2013 02:33:34 -0000

One more question - has anyone had success getting Repetier running on their Brainwave? I got Marlin working nicely but decided to risk my luck and get Repetier running as well to make an informed selection between the two.

I got Repetier to compile by creating a pins entry for the Brainwave and defining EXTERNALSERIAL (to solve an error or conflict with the Repetier-defined RFSerial).

When I flash it to the board, all three motors on my Kossel Mini build "vibrate" back and forth, although they don't actually seem to step. In other words, nothing moves but they just sit there vibrating. No serial port appears.

Thanks!

Re:

jcdoll — Tue, 18 Jun 2013 02:29:37 -0000

Thanks!

Re:

jcdoll — Mon, 17 Jun 2013 11:26:10 -0000

My pots were trimmed to Vref ~1.1V out of the box. Looking at the datasheet and board schematic, the ratio of Vref to drive current is about 2.5. In order to drive the motors with 0.8A (the max of the drivers) I would set Vref to 2V, right?

My board is running nicely and driving my partially complete Kossel-style delta build. So far so good!

Re:

jcdoll — Sat, 15 Jun 2013 14:38:57 -0000

Nevermind! It required many presses of the reset button after flashing as noted in Instructions above.

Re:

jcdoll — Sat, 15 Jun 2013 14:03:09 -0000

I'm having a port issue. In programming mode I see the board at COM4 (i.e. running Windows). Marlin compiles (using your branch for testing) and I flash the board succesfully (avrdude verifies it, no errors).

Afterwards, the board does not create a USB port when plugged in and I can't access it except when in programming mode. I've seen this problem reported by a few other Delta printer people.

Is this a firmware or driver issue? Any suggestions? Thanks!

Re: Printing printers

jcdoll — Tue, 30 Apr 2013 14:35:08 -0000

I forgot to mention Thingiverse!

http://www.thingiverse.com/...
http://www.thingiverse.com/...
http://www.thingiverse.com/...

Re: On biking to work

jcdoll — Mon, 15 Apr 2013 03:08:19 -0000

Thanks. Yeah, the 2W light is amazing for the trail.

Re: Such a good quote

jcdoll — Wed, 07 Nov 2012 11:07:35 -0000

yes. i'm also psychic and you are still in kenya.

Re: Run Comsol Simulations from Matlab

jcdoll — Sun, 30 Sep 2012 18:18:31 -0000

Hi Subha -
Unfortunately I can't solve your problem for you. But hopefully the comments in the code above (and the Comsol documentation!) will get you started.

It's important to note that the Comsol-Matlab example on this page is from Comsol/Femlab 3.1 so is 6+ years old. Comsol reworked their Matlab interface in version 4. So if you're using a modern version of Comsol then it will probably look very different than what I posted. Also, parameterization of your geometry is well supported in Comsol 4.x and doesn't require fussing with any .m files.

Best of luck,
Joey

Re: Downloading Stanford Lectures

jcdoll — Thu, 15 Dec 2011 23:49:44 -0000

MJ -
Your first issue is installing mencoder which I can't help you with. I haven't used OS X in a few years so don't recall the installation procedure. You can google "mencoder install macosx" to find instructions. After that if you run into issues just try using The Google, it'll be much faster and more reliable than me. :)

- joey

Re: Downloading Stanford Lectures

jcdoll — Thu, 08 Dec 2011 03:42:36 -0000

So subprocess can't run. You should try googling "python subprocess child_exception" and see what you can find. One thing you can do is to try adding the shell=True parameter at the end of Popen. I was just working a separate project using subprocesses and needed to include that for everything to work.

If all else fails, it works great in Ubuntu and you could just boot off of a flash drive to get the videos you need. Better hurry though because the quarter is almost over and all of this quarter's classes will turn into pumpkins. Good luck!

- joey

Re: Downloading Stanford Lectures

jcdoll — Wed, 07 Dec 2011 01:45:34 -0000

"ee212" is a text file that contains the URLs. So when you call downloadClass('fall2010/ee212'), the script is opening that text file and interpreting each line of the file as a URL. The videos themselves are downloaded to the same folder that getSCPD.py lives in.

Make sense?

- joey

Re: Downloading Stanford Lectures

jcdoll — Sun, 04 Dec 2011 12:48:35 -0000

I use relative paths, here's an example...

In getSCPD.py:
downloadClass('fall2010/ee212')

In ./fall2010/ee212 (relative to the getSCPD.py location):
http://lang.stanford.edu/co...
http://lang.stanford.edu/co...
http://lang.stanford.edu/co...
...

Hope this helps.

- joey

Re: Run Comsol Simulations from Matlab

jcdoll — Wed, 16 Nov 2011 21:54:44 -0000

Hi Ali -
See the reply I just posted to Rupeshrpkoirala. But note, I haven't used Comsol/Femlab for its Matlab integration since 2004. So while I'm keeping this page up for posterity, I'd wager that there are better ways to do it now.

- joey

Re: Run Comsol Simulations from Matlab

jcdoll — Wed, 16 Nov 2011 21:53:18 -0000

See the tail end of the script on this page. most importantly...

fem.sol=femlin(...);
eii_struct = posteval(fem,'normE_wh',...);

You use posteval in order to pull data out of the results structure. At least, this was how it worked back in 2004. Beyond that I can't provide any advice.

Cheers,
Joey

Re: Importing Playlists from iTunes to Banshee

jcdoll — Sat, 17 Sep 2011 18:34:30 -0000

Usage instructions are in the script header:

./itunes-to-banshee.pl iTunesLibrary.xml banshee.db

Beyond that, you're on your own. If you aren't familiar with the command line, you're going to have some difficulty with this.