- 25th Nov 2007.
I've put together a new web site all
about my CNC router.
For more information on the CNC build, visit http://www.thebackshed.com/cnc
I've wanted to make a CNC router for
some time now. I first used a cnc router about 3 years
ago when I worked for a jigsaw making business. We had
one cnc router and 2 300watt laser cutters.
Multicam CNC router, 1200X1200 bed, vacuum table.
I started building my router after visiting Terrys
windmill site. Terry had a couple of movies your
could watch of his router in action, and I was hooked.
I just had to build one.
So I started some internet research
into other home made cnc routers, and soon realised
there was a lot more to home made routers than I first
thought. Its a big learning curve, with a lot of redesign
and rebuilding along the way.
First up I designed and built the Z
axis. I figured it was the easiest part to make and
I could learn from it before I designed the rest of
the router. Luckily I have access to a industrial laser
cutter, so I designed the parts in CAD and cut them
from 3mm plate.
I used had a couple of linear bearings
from an old Telix machine, and some stepper motors from
a junked laser printer. Next I ordered in 3 stepper
controllers from Oatley Electronics, and put together
the control box.
The power supply was a transformer from
a UPS and this gave me a bus voltage of 16v. The box
is a old PC case. I wired up a printer port lead and
installed KCam software from http://www.kellyware.com.
A bit of software set up and I had the thing moving
back and forth along the axis.
I designed, laser cut and assembled
the Y axis. I'm using roller bearings on box section
as the linear bearings, and allthread as the lead screw.
Yeah pretty crude, but cheap.
Next up was the X axis.
Overall bed size is 1200 by 600. And a coat of paint,
hammer finish always looks good.
The X axis has two leadscrews,
one at each end of the gantry. These are driven by one
stepper motor. I've used chain and sprockets on my machine
because its easy to change gear rations. Chain is easy
to cut and join to any length, and very cheap, but noisy.
Once I have the router fully sorted, I will replace
the chains and sprockets with toothed belts and pulleys,
but chain will do for now.
Now I needed a router head.
My hobby lathe had a milling attachment that I think
I've used once in the last 3 years. The mill has a variable
speed control, and 2 speed gearbox. So I mounted it
on the Z axis, fitted a 4mm router bit and tried some