The Spark Gap Podcast - Episode 5

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Show Synopsis

Corey inquires about Karl’s hobby, CNC Machining. Karl discusses his CNC Router and the decision that went into it.

A really good overview of hobby machining

Guerilla Guide to CNC Machining: http://lcamtuf.coredump.cx/gcnc/

Bridgeport Mills and Machining History

A little bit of history of Machining in America: http://americanmachinist.com/features/machining-freedom

Modern Bridgeport Machines: http://www.bpt.com/

A look at End Mills

Intro to Cutting tools: http://wiki.imal.org/howto/cnc-milling-introduction-cutting-tools

http://blog.cnccookbook.com/2012/04/06/cnc-router-cutters-types-and-how-to-use-them/

CNC Router vs. CNC Mill

An example of a router that uses rubber belts http://www.shapeoko.com/

Karl’s CNC Router

Early Picture of my CNC Router : https://www.flickr.com/photos/62760213@N03/8662397576/in/photostream/
Current Status of my CNC Router: http://500px.com/thesparkgap/photos

Main Body of the Router: http://www.carving-cnc.com/cnc-router-mainbody/6040s80mainbody.html

Aluminum Nema23 Mounts: http://ugracnc.com/MECHANICAL-COMPONENTS/Stepper-Motor-Mount.html

800W Spindle: http://ugracnc.com/AIR-COOLED-SPINDLES/GMT-Air-Cooled-CNC-Spindle-0.8-kW-220-V-R.html

My exact Spindle being tested: http://www.youtube.com/watch?v=XQo9B4XoFfE&index=112&list=PL4xj5ba5zR38Ze2e-qc_0eSsVib2g3LeR

115 Volt Single Phase VFD: http://www.ebay.com/itm/HITACHI-WJ200-007MF-1HP-115-VOLT-SINGLE-PHASE-IN-3-PHASE-240-VOLT-OUT-DRIVE-/111264636192?pt=LH_DefaultDomain_0&hash=item19e7e39d20

80/20 Style Aluminum Extrusions

Where the name comes from: http://www.8020.net/

Open Beam Extrusions’ Main website: http://www.openbeamusa.com/

Initial KickStarter: https://www.kickstarter.com/projects/ttstam/openbeam-an-open-source-miniature-construction-sys

Kossel Style 3d Printer: https://www.kickstarter.com/projects/ttstam/openbeam-kossel-pro-a-new-type-of-3d-printer

Stepper Motors

Overview of Bi-polar and Uni-polar: http://probotix.com/stepper_motors/unipolar_bipolar/

Bi-polar vs. Uni-polar: https://www.youtube.com/watch?v=vxxnPJBxG3M

Microstepping

Overview of Microstepping: http://www.zaber.com/wiki/Microstepping_Tutorial

Myths and Realities: http://www.micromo.com/microstepping-myths-and-realities

Kickstarter Backed CNC Routers

Othermill: https://www.kickstarter.com/projects/otherfab/the-othermill-custom-circuits-at-your-fingertips

Nomad CNC Router: https://www.kickstarter.com/projects/178590870/the-nomad-cnc-mill

Stepper Motor Driver Controllers

TinyG Stepper Motor Controller: https://synthetos.myshopify.com/products/tinyg

GRBL: http://bengler.no/grbl

CNC CAM Software

PyCAM: http://pycam.sourceforge.net/

MakerCam: http://www.makercam.com/

Heeks CNC: https://code.google.com/p/heekscnc/

Meshcam: http://www.grzsoftware.com/

CamBam: http://www.cambam.info/

CNC CAD Software

Free, commercial 2.5D CAD: http://www.3ds.com/products-services/draftsight/overview/

OpenSCAD: http://www.openscad.org/