coupling

6 Week Progress Report

/ By / DIY CNC Router, General / 1 Comment

So right after the last post I did a bunch of work in about two weeks and was to the point were I was just about ready to run, and then nothing…  this update has been sitting in draft mode for 2 weeks so I decided to force myself to finish it tonight, so here we go.

The first thing I decided I needed to do was to wire up and test the surplus motors I bought.  I used  22ga  4 wire security system wire I found out home depot, I used this wire on my two previous machines without any issues.  Using the documentation over at the Lin Engineering site, I was able to easily wire the motors up as bipolar parallel.

Then with a bit of remorse, I reclaimed the electronics from the Rockcliff Mini Model D, removed the extra parts (4th Axis – Probotix side step and MDFLY breakout board) and wired it all up to the remaining Xylotex 3 Axis controller.  After making the necessary changes to the EMC2 configuration, I ran a few quick tests and everything just worked… this is the first time that has ever happened, but I guess 3rd time is a charm after all.

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DIY Couplings

/ By / CNC Resources, DIY CNC Router / 6 Comments

OK, so here we go again.

A running theme in my building process is budget, I am always trying to build adequate parts myself instead of buying them.  This has two goals, 1) Save money, 2) Learn how to create the parts I need so I can replace them as needed, and build more for future   machines.  This week’s project was couplings, specifically I needed four 1/4″ to 1/2″ couplings.  I am modeling my attempt after this: DIY Coupling, and my own prior experience with using 1/4″ brass sleeve bearings for my first machine.

I decided to try and find some aluminum tubes that would fit the 1/2″ acme rod and 1/4″ motors shaft that would also nest inside each other.  I found what I was looking for at OnlineMetals.com, and order the following:

0.75″ OD x 0.125″ WALL x 0.5″ ID 6061 T6 TUBE
0.5″ OD x 0.125″ WALL x 0.25″ ID 6061 T6 TUBE

They arrived in a week, I opened the box, took out the tubes and… the 1/2″  OD tube did not fit inside the  1/2″ ID tube… <*despair*> …If I only had one of they little metal lathes I could fix the problem.  I have a drill press, and some 1/4″ nuts and bolts, instant vertical lathe, game on.

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