Induction Furnace

http://www.instructables.com/id/30-kVA-Induction-Heater/?ALLSTEPS

Build an induction heater and become a metalsmith

http://www.richieburnett.co.uk/indheat.html
http://en.wikipedia.org/wiki/Induction_heating
http://www.neon-john.com/Induction/Index.htm
http://www.tubebooks.org/technical_books_online.htm
http://www.johndearmond.com/

Crucible notes:
http://www.budgetcastingsupply.com/Crucibles.php
http://www.lindsaybks.com/dgjp/djgbk/cruc/index.html

Some interesting books:
http://www.lindsaybks.com/dgjp/djgbk/vacf/index.html

Fire sand: http://www.backyardmetalcasting.com/book_fp.html
8×8 box for casting: http://www.backyardmetalcasting.com/buy_8x8flask.html
http://www.backyardmetalcasting.com/book_fp.html

A meter for measurements, and a interface block here. These were suggested by NeonJohn via email on Mon, Jan 18, 2016 at 10:22 AM in my gmail account.

Servos, Steppers, and DC Motors – OH MY!!!

On this page I’m going to cover pretty much some of the ways you can make things move.

Suppliers and Parts:

Servo City

  1. Turnigy XGD-11HMB Digital Mini Servo  3.0kg / 11g / 0.12  $4.72 each

  2. http://www.hobbyking.com/hobbyking/store/__25456__Turnigy_XGD_11MB_Digital_Mini_Servo_2_2kg_11g_0_12.html

Hobby King

  1. HK15138 Standard Analog Servo 38g / 4.3kg / 0.17s  $3.12

Extruding issues – filament stripping

I recently started to have issue with the extruder stripping the filament instead of pushing it through the hot end. At first I thought it might be the hobbed bolt I got from Ultimachine a year ago. I swapped it out with my hyena from arcol. After about a day, the problem was back. Which pointed to the hotend itself instead of the hobbed bolt. Not something I wanted to hear, as that is MUCH more expensive to fix. As luck would have it I finally got my Arcol V4 in, and decided to give it a test drive in the old system.  It was compatible with the Mendel Prusa v2 with no modifications.  It appeared to extruder well, but since my bed isn’t level now the print had some minor issues/imperfections in it. I was printing with PLA, which is giving me problem, and it didn’t want to stick to itself. I will check the temp with my infrared thermometer tonight to make sure the thermistor table is accurate. I read 93k ohms across the thermistor before I wired it up, and my other was at 100k.  After a brief discussion with Laszlo Krekacs (creator of the arcol), I started using open “7” in the marlin firmware for the thermistor.  It seems to be reflecting more accurately the true temp of the arcol now.

Rostock Printer

Okay.. so here’s the research on the rostock printer.  I’ve talked with some friends and will be documenting this little journey here.

I will be using a ball joint variant that is here on thingieverse.

https://plus.google.com/photos/102205917688348138845/albums/5794445797670248865

https://www.google.com/search?q=celcon&ie=utf-8&oe=utf-8&aq=t&rls=org.mozilla:en-US:official&client=firefox-a

Get ball joints here (traxxas part number 5347)     $9.99 at Mike’s Hobby on I35
http://www.royshobby.com/index.php/77-welcome/68-newwelcome

410/1000 Carbon Fiber Rods  $4.99 / rod at Mike’s Hobby on I35

Smooth Rods (Fasekn

Things to print:

Cheapest nema 17 stepper motors I’ve found yet that have been given good peer review by the reprappers.

Electronics.  I found this and so far has been the best deal I have found.

Home Depot:

  • 2’x4’x1/2″ Birch Plywood
  • 2’x4’x1/4″ Birch Plywood
  • Rostock Jig here

 

Shopping List

Subtotal:  $310.00

 

Pics of a built rostock

 

Spool hanger

imagePosted 12/03/2012:
I finally got tired of having to manually spool filiment off the spool that was on the ground, and then have to “untangle” it after every print.  So.. design these brackets to hold a wooden dowel rod.

 

Posted 12/4/2012:
After letting it run overnight unattended, I have concluded it doesn’t take much tension at all to make the extruder start to dig into the filiment and stop extruding.  I didn’t waste much plastic, as the print stopped around the 4-5 layer of two prusa feet.  But to wake up to unfinished feet was disappointing.