Re: [CAD_CAM_EDM_DRO] Re: k2cnc routers

I will second Freds opinion. I have a K2 CNC Plasma,
even went to talk and see Kevin at K2 about the
machine he builds. Its a great product plus I know
that his products are even getting better. I have
photos on mach2/sheetcam, I'll try to post some pics
here.
-pierre
www.fattunadesigns.com

--- Fred Smith <imserv@...> wrote:

>
>
> --- In CAD_CAM_EDM_DRO@yahoogroups.com, "tauscnc"
> <tauscnc@h...>
> wrote:
> >
> > > I have one.
> > >
> > > Fred Smith - IMService
> > > http://www.cadcamcadcam.com/hobby
> >
> > Hey Fred,
> > That's great! Do you mind expanding on which one
> and opinion about
> > it? I should have asked an opened ended question
> :)
>
> We had a 14 x 14 x 3 machine with our SYS-3 servo
> system at the
> Cabin Fever Expo in York, PA in January. List price
> for the bare
> frame is now $1150. We used it for live testing of
> the new homing
> script routines. With a DeskCNC SYS-3 and a
> portercable trim
> Router, total price is $2433 plus shipping.
>
> The machine has 4 linear roller bearings and dual
> hardened guide
> rods on each axis and acme lead screws with delrin
> antibacklash
> nuts. Our servo motors mounted directly to the nema
> 23 motor mounts
> and the lovejoy style couplings are adequate for
> shaft alignment on
> a router. I get up to about 100 ipm, maybe more if
> I tweak
> everything better. 70 ipm is rock stable on all
> axes.
>
> The frame is all machined aluminum with mostly
> stainless steel
> screws. Some of the screws were a tad too short for
> the main frame
> assembly. Too much tightening and they would have
> stripped out.
> Assembling the machine which came in 4 dowel
> assembly matched parts
> was about 5 minutes. The X axis is not quite as
> smooth as I would
> like. I have not had time yet to trouble shoot it
> though, as the
> machine was purchased to quickly get some machining
> completed. It
> took about 10 more minutes to add the motors and
> wiring.
>
> This machine did not include a worksurface. I
> purchased an 8 foot
> section of pre painted mdf shelf board, cut to 21"
> lengths at no
> charge (thanks to Home Depot).
>
> There was not enough clearance between the gantry
> supports and the
> table top (3/4 thick), so I added a chamfer to both
> the gantry( 1/4
> inch 2 places, probably voided my warranty ;-) and
> the table top(3/8
> inch one place) to assure a clearance fit.
>
> The Y and Z lead screws are not protected from
> cutting swarf, the X
> is covered by the stationary table top, but not
> fully enclosed. All
> 6 guide rods are unprotected. My long term concerns
> are that the
> lead screws, drive nuts, guide bars, and linear
> bearings will get
> gummed up and provide less smooth and accurate
> motion.
>
> I have been using the machine to cut 3/8 scale,
> prototype saddle
> components for a project which will use direct
> measurements from a
> horse, automatically create a saddle design and 3D
> contouring
> toolpaths in Vector Cam, then cut the parts using
> DeskCNC on the
> K2CNC router.
>
> My prototype stock is a standard pine, 2 x 4 board,
> and I have been
> able to consistently machine the material at 1/4 in
> depth of
> cut, .150 in stepover. Our machine included the
> Porter Cable trim
> router bracket. Using a PC trim router, with a 1/2
> dia. cove bit(
> 1/4 shank), I am able to rough out the parts at 25
> ipm feed rate.
> The spindle starts to over load if I push it much
> faster. Some parts
> of the contour are 1 inch deep, so the bit is
> sticking a ways out of
> the spindle collet. It's pretty exciting because
> with this small of
> a machine, all the noise, cutting, and chips are
> RIGHT THERE IN YOUR
> FACE!
>
> No dust collection is available with the machine so
> make sure to
> consider that as it is required for any CNC router.
>
> I have evaluated several machines in this size/price
> range over the
> last few years. This is one of the better ones,
> except for the
> protection from dust buildup on moving parts. I
> prefer a machine
> with V-rollers on X and Y.
>
>
> Fred Smith - IMService
> THE source for low cost Cad-cam and Desktop CNC
> http://www.cadcamcadcam.com/hobby
>
>
>
>
>
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=====
Pierre Andrada
South San Francisco, California
www.fattunadesigns.com