Re: G Arc codes
- From: "John R. Carroll" <nunya@xxxxxxxxxxxxxxx>
- Date: Fri, 28 Aug 2009 01:02:40 -0800
Kurt Ayrez wrote:
"John R. Carroll" <nunya@xxxxxxxxxxxxxxx> wrote in message
news:ErOdnd99WsIGGArXnZ2dnUVZ_rWdnZ2d@xxxxxxxxxxxxxxx
Kurt Ayrez wrote:
just seeking reassurances.
A typical and simple arc in the XY plane would be something thus.
%
G21
G00 G40 G54 G90 X0 Y0 Z100 F1000 S1000 M03
G00 X0 Y50 Z10 M08
G01 Z-3
G02 G17 X0 Y-50 I0 J-50 (as G90 is called X & Y are absolute while I
understand I & J are incremental)
G01 Z10 M09
G00 Z100 M05
X0 Y0
M30
%
now in the YZ plane
%
G21
G00 G40 G54 G90 X0 Y0 Z100 F1000 S1000 M03
G00 X50 Y0 Z10 M08
G01 Z-3
G02 G19 Y-50 Z-3 J-50 K0 (as G90 is called Y & Z are absolute.
Assuming J & K are incremental is it correct to assume K should = 0.
I ask this because using K0 or K-3 the prog appears to still
function) G01 G17 Z10 M09
G00 Z100 M05
X0 Y0
M30
%
In both cases a 6mm dia ball nose cutter is producing a concave
arced slot.
G code states I J & K can be either absolute or incremental. Is it
correct for me to assume that if G90 is called at line 1 then all
post lines are absolute or are they.
In short I am trying to understand where I J & K pick up being
incremental or absolute.
This is control dependent.
With few exceptions, your control either wants to see the absolute
position
of the arc center or the incrimental distance to that point.
You can also just use the R command instead of I,J,K on many
controls.
What have you got?
--
John R. Carroll
a Prototrak fitted to an XYZ SM3500, I will check the manual.
'Controls Type: Generic SWI ProtoTRAK MX2 (MX2,MX2E,M2,A.G.E.2)
ARCT=1 ' ARCT=0 (RADIUS(R) OUTPUT),ARCT=1 (ABS(IJK) CENTERS),ARCT=2
(INC(IJK) CENTERS)
DRILLT=1 ' DRILLT=0 (CANNED DRILLING CYCLES),DRILLT=1 (MANUAL DRILLING
OUTPUT)
--
John R. Carroll
.
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