Hi Folks:
Sorry if this has already been posted but..... So there I was ... testing
the code for a new part I want to make. I start out with this line
starting at pos X-1.829 Y-1.222
G03 X2.087 Y-0.697 I1.829 J1.22
EMC complains that the radii of the start and end points are off by 0.0013"
of an inch. Well I think, my cad package (Alibre 12.1) must be generating bogus
drawings so I calculate everything by hand, and sure enough Alibre is right.....
So I'm thinking hey, this is the larges arc I've ever done, maybe Axis is
integrating the movement and is using a single precision float to store the
total motion in. Single precision floats start losing it really fast in the
fractional part, and we're dealing with 1/10th and powers of 10 which floats
have problems with .... Let me cut the length of the move and see if this works.
So I try this.....
G03 X0.000 Y-2.200 I1.829 J1.222 ; HAD TO SPLIT THIS MOVE
G03 X2.087 Y-0.697 J2.200
And it works!
So the question is ... is somebody sleeping at the keyboard with declaring
the data type used?
Andrew
FYI, here's the whole shape. This is the code I'll use to draw an outline on
the raw stock with a pen.
---------------
F5.0
G17
G00 Z1.000
G00 Y2.200
G00 Z0.000
G03 X-1.829 Y1.222 J-2.200
G02 X-2.245 Y1.000 I-0.416 J0.278
G01 X-5.000
G03 X-5.866 Y0.500 J-1.000
G02 X-6.299 Y0.250 I-0.433 J0.250
; POINT OF SYMETRY ABOUT X AXIS
G01 Y-0.250
; POINT OF SYMETRY ABOUT X AXIS
G02 X-5.866 Y-0.500 J-0.500
G03 X-5.000 Y-1.000 I0.866 J0.500
G01 X-2.245
G02 X-1.829 Y-1.222 J-0.500
G03 X0.000 Y-2.200 I1.829 J1.222 ; HAD TO SPLIT THIS MOVE
G03 X2.087 Y-0.697 J2.200
G02 X2.561 Y-0.355 I0.474 J-0.158
; POINT OF SYMETRY ABOUT X AXIS
G01 Y0.355
G02 X2.087 Y0.697 J0.500
G03 X0.00 Y2.200 I-2.087 J-0.697
G00 Z1.000
G00 X0.000 Y0.000
; THIS SHOULD COMPLETE THE OUTER PARAMETER.
; Central Hole
G00 X0.000 Y1.700
G00 Z0.000
G02 X0.000 Y1.700 J-1.700
G00 Z1.000
G00 X0.00 Y0.00
; Grinder Hole
G00 X-4.998
G00 X-4.998 Y0.500
G00 Z0.000
G02 X-4.998 Y0.500 J-0.500
;
G00 Z1.000
G00 X0.000 Y0.000
M2
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