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The first one I did was made from
MDF. I designed it and made the plans available for free at
CNCzone.com Go
here if you would like to download a set of these plans.
If you would like to see some images of this machine, click here. |
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I
never sealed the
MDF on my first router, so when it got real wet and humid one year, it
sagged and warped. I used what I could from it and made this
one. It had a moving table design and bronze bushings for the
Y and Z axis. |
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This is design
number 3.
It has a base that is made from a 20" x 30"
x 3.5" thick piece of aluminum that I got free from work.
The sides and gantry are made from a 1"
thick piece of aluminum. They have a lot of holes in them
because
they were made from one piece of aluminum that was used as a
sacrificial top for a CNC machine.
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The
whole machine
sits on top of a cabinet, so that I can close the doors when I'm not
using it. The keyboard/mouse tray is on drawer slides so that
I can push them in when I want to close the doors. |
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Here
is a back
view. The vertical sides were offset 4" to the back, so that
I could gain some more travel in the X direction. The wire
guide is a piece of 3/4" braided PVC clear tubing that is held in place
with conduit clamps. |
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Here
is a close-up of
the Z axis showing the cast router mount clamp and DumpsterCNC
anti-backlash nut. The Y axis uses a large linear bearing
that I bought used from EBay. I started out using a Tool Shop
multi-purpose router. It had a lot of run-out and wasn't very
accurate, but it only cost $40.00! |
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This
is a back view
of the Z axis. |
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A
back view of the
gantry and the X axis anti-backlash nut. I'm only driving my
gantry from one side at this time. There does not seem to be
a problem with skewing, but I made provisions to add another lead screw
to the other side, should the need arise. |
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A
close-up view of my
linear bearings. I cast the parts and machined them at
work. They have 10 skate bearings per truck and ride on a
piece of 1/4" x 3" piece of cold rolled steel. The angle
bracket on top was also a part that I cast in my foundry. |
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I
made my own bearing
blocks (the black pieces) on CNC #2 before that machine got
disassembled and scavenged for parts. The steppers used here
is a 110 oz/in. |
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Here
is my control box. I'm using a Xylotex 3 axis control board
with a 24 volt power supply. |
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A
back view showing the connections. |
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