Error in end point of circle (Siemens 808d turning)

[Anonymous]

I am trying to run a very simple test part on my new lathe.

I get a message in the Siemens control:  "error in end point of circle"

Anyone have any ideas?

[Lonnie.Cady]

Try changing to IJK format if possible.  Set the parameter "useRadius" to no in the post processor dialog.

There a have been issues like this before and that seemed to fix it.

[Anonymous]

Excellent suggestion.  I will try it this afternoon.

Thanks!

[Lonnie.Cady]

here is the link to a rather lengthy discussion about it. 

[Anonymous]

I dont think the link made it into your post.

[Lonnie.Cady]

I get easily side tracked

http://forums.autodesk.com/t5/machining-discussions/arc-center-is-not-correct/td-p/6310480

[Anonymous]

Well, oddly enough it ran perfectly with 'use radius' ON.

I think my initial code posted was the incorrect one.  The error would show up if use radius is OFF (diameter mode).

[video]

Here's the code that worked:

; %_N_1_MPF
N10 G90 G94 G18
N11 G70
N12 LIMS=3000
N13 G53 G0 X3
N14 G53 Z3

; Face2
N15 T2 D1
N16 G54
N17 G95
N18 G97 S2000 M3
N19 G0 X1.3 Z0.1969
N20 G0 Z0.0066
N21 G1 X0.6131 F0.01
N22 X0.5 Z-0.05
N23 X-0.0625
N24 X0.0506 Z0.0066
N25 G0 X1.3

; Profile1
N26 G95
N27 G97 S2000 M3
N28 G0 X0.7 Z0.0062
N29 X0.5738
N30 G1 X0.5431 F0.01
N31 X0.43 Z-0.0504
N32 Z-0.26
N33 X0.4375
N34 G18 G3 X0.4992 Z-0.267 CR=0.0713
N35 G1 X0.6123 Z-0.2105
N36 G0 Z0.0062
N37 X0.5066
N38 G1 X0.4631 F0.01
N39 X0.35 Z-0.0504
N40 Z-0.3
N41 X0.4375
N42 G3 X0.4992 Z-0.3264 CR=0.0313
N43 G1 X0.6124 Z-0.2698
N44 X0.6229
N45 G0 X0.7
N46 Z0.1969

N47 G53 X6
N48 G53 Z3
N49 M30

[Lonnie.Cady]

I don't think useRadius is setting the diameter mode. It is determining if you want to define the arc using CR or IJK.   The below code is the exact same using each mode.

N101 G18 G2 X1.88 Z-0.0356 CR=0.0256

N101 G18 G2 X1.88 Z-0.0356 I0.0181 K-0.0181

[Anonymous]

I have a lot to learn!

Thanks!

Brian