My first cnc router head was the milling attachment from my hobby lathe.
It was heavy, but has variable speed and a good sized chuck. This
got me started, but as I soon discovered, the spindle speed was
too slow for timber routing. My spindle had a maximum speed or 2500RPM,
but as I found out after visiting CNCZone.com, I needed a spindle
speed 10 times that.
I visited the local hardware store and picked up a plunge router
for only $50! Variable speed, cheap with a 1/4 chuck. A bracket
was made and the new router put into service. Big improvement.
I wanted to try fine engraving, so modifed a small drill chuck
from a dead battery drill to fit the 1/4 router. The drill chuck
takes the engraving tps, but as I soon discovered the router itself
didnt spin true.
So I visited my local ardware store again and picked up a cheap
engraver. I made an adapter to take the engraver, it bolts on next
to the routing head. The new adapter also doubles as the vacuume
nozzle when I'm not engraving. Unfortunately, I discovered the new
engraving tool was also not true, with about 0.25mm wobble.
The moral or the story, dont buy a cheap router heard or engraving
tool if you want to do fine machining.
Both the router
head and engraver fit side by side, the engraver lower than the
router, so I can leave the router attached when I'm using the engraver.
When I'm using the router, I take off the engraver and fit a vacuume
pickup to such up all the dust.