On 2/7/22 20:49, andrew beck wrote:
well for what it is worth.
i have used radius values for the last 2 years on my mill and it has been
pretty good.
my mill is a full on VMC, its taiwinese thing chevalier 2040 similar to a
haas VF3 and sat most of its life with a dead control so the bed ways are
like new. (also have the linear rail version of the same machine)
anyway i do quite a few injection molds on it and so far have never had a
problem.
i normally post the 3d surfacing code out at 0.02 mm step overs for the
smaller details stuff and never had a problem with accuracy
so i think for most people it doesn't matter.
cheers
andrew
Thanks. It could be the comment in the manual is not longer valid. I
think I was looking at 2.5 docs, so pretty old.
On Mon, Feb 7, 2022 at 5:56 PM dave engvall <[email protected]> wrote:
Hi,
I've read the assertion many times that ijk is better than radius and
always assumed it to be correct; but by how much.
Few of us run machines and are 'new' tigjht ;-) Maybe I've not looked
in the right place(s)
for an analysis or for demonstrated interp of circles with some kind of
error band. Any proof and or experimental evidence?
Just poking the bear. ;-).
Dave
On 2/7/22 1:01 PM, andrew beck wrote:
One option is set your post processor to post radius not ikj values.
That helped me once.
They are much more forgiving
On Tue, 8 Feb 2022, 09:48 Stuart Stevenson, <[email protected]> wrote:
Something is fishy between the Y values.
You have Y4.xxxx in the first list and Y0.xxxx in the full listing.
On Mon, Feb 7, 2022 at 2:39 PM Stuart Stevenson <[email protected]>
wrote:
I see it in your gcode file listing
On Mon, Feb 7, 2022 at 2:39 PM Stuart Stevenson <[email protected]>
wrote:
Where is the decimal point in the X value of "End=(X14444, Y0.8964)"?
I would say it is X1.4444 and expect this is a typo when you entered
this
in the email.
On Sun, Feb 6, 2022 at 11:12 PM Andy Howell <[email protected]>
wrote:
We had been cutting with the same gcode when suddenly it came up with
an
error:
Radius to end of are differs from radius to start:
Start=(X1.4208,Y4.8728)
Center=(X1.4208, Y4.8964)
End=(X14444, Y0.8964)
r1=0.0236
r2=4.0001
Its got to some config issue. The same file runs in the simulator
just
fine. That r2=4 is curious. We are cutting in a jig using fixture
G55.
We had touched off the Y by 4 inches to run the file again. That
worked
fine. We more the Y back 4 inches and touched off again to set the
G55
back to its actual 0,0 origin. When we ran the time, we started
getting
this error.
This is the code in question. Its complaining about line N70.
%
(TEST PIECE 4IN)
(MY PROGRAM COMMENT)
(T1 D=0.2362 CR=0. - ZMIN=-0.11 - FLAT END MILL)
N10 G90 G94 G17 G91.1
N15 G20
N20 G53 G0 Z0.
(BORE6)
N25 T1 M6
N30 S18000 M3
N35 G55
N40 G0 X1.3853 Y0.8728
N45 G43 Z0.6 H1
N50 G0 Z0.08
N55 G1 Z0.0236 F20.
N60 G18 G2 X1.409 Z0. I0.0236 K0.
N65 G1 X1.4208
N70 G17 G3 X1.4444 Y0.8964 I0. J0.0236
Any ideas about what is wrong? We are running LinuxCNC 2.7.15.
Thanks.
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