Built to Spec » CNC http://www.built-to-spec.com/blog Making Cool Stuff Fri, 07 May 2010 03:05:06 +0000 en hourly 1 http://wordpress.org/?v=3.0 CNC Project Update – Stepper Motors, Controllers, and Miscellaneous Electronic Bits Acquired http://www.built-to-spec.com/blog/2009/12/27/cnc-project-update-stepper-motors-controllers-and-miscellaneous-electronic-bits-acquired/ http://www.built-to-spec.com/blog/2009/12/27/cnc-project-update-stepper-motors-controllers-and-miscellaneous-electronic-bits-acquired/#comments Sun, 27 Dec 2009 23:17:17 +0000 Craig http://www.built-to-spec.com/blog/?p=152 Progress on my CNC router platform has been progressing slowly but I’ve hit a few milestones.  I got 4 RepRap 2nd generation motor controllers assembled and tested and have acquired 4 new NEMA23 steppers and one used high torque Xylotex NEMA23 from  the local swap meet to use in the prototype.  I got the X axis up and running and was quite pleased with the torque even the smaller steppers put out.  I also picked up some nice 4-pin sockets, terminal strips, and limit switches for the prototype build as well as a few other electronic goodies at the SSARC Hamfest about 2 months back.

As far as design goes, I’ve decided against the 1″ square tubing and skate bearings design pictured above.  It’s just too bulky for anything other than the X axis so I’m going to switch over the the more traditional precision ground shafts and bearings for linear guides on all axes at this point.  Other than being bulky, I like the design and will probably try to utilize it at some point in the future.  I’ve already acquired some shafts and bearings for testing this new setup but have yet to cut new bearing brackets to install on the boot-strap platform.   The overall design is on its second revision on paper with details for the X and Y axes specified and sketched up.  I’m looking at alternative linear motion setups that I could possibly fit within the specified budget so it may undergo another revision before I start cutting parts for the boot-strapped version.

This project will likely progress slowly for a bit longer as I seem to have outgrown my current work area.   I’m hoping to be able to move to a more suitable location in a few months time and set up a proper workshop, or at least that’s the plan.

]]> http://www.built-to-spec.com/blog/2009/12/27/cnc-project-update-stepper-motors-controllers-and-miscellaneous-electronic-bits-acquired/feed/ 0 Contraptor Project http://www.built-to-spec.com/blog/2009/10/20/contraptor-project/ http://www.built-to-spec.com/blog/2009/10/20/contraptor-project/#comments Wed, 21 Oct 2009 03:12:28 +0000 Craig http://www.built-to-spec.com/blog/?p=120 Contraptor Parts

If you like Cartesian robots and/or erector sets, you should check out the Contraptor Project.  It’s an open source construction set for things like CNC machines, plotters, and 3D printers.  It’s kind of like a rapid prototyping system for automated construction/manipulation bots using cheap, easy to build parts.  Its components are easy to build with a few simple tools and they’re compatible with their more expensive industrial counterparts.   Many of the parts utilize some interesting construction tricks so it’s defiantly worth a look if you’re into low cost robot construction.

]]> http://www.built-to-spec.com/blog/2009/10/20/contraptor-project/feed/ 0