Z issues with G02

[samedwards_22]

Hello,

I'm having an issue with the z feed when using G02. It's a bit awkward to explain, but rather than the z descending at my programmed plunge angle, it feeds at a much shallower angle for a large portion of the circumference. This leaves a stepped z profile (like a spiral) as there is no final cut at the min z.

This only seems to happen using G02, for both internal and external profiles. Other shapes seem fine which leads me to believe it has something to do with G02, almost like it divides the z movement up over the whole G02 movement.

I'm using 1.2115 on my machine and don't get this when I run it on a 2.117 sim. ESTL for programming. Snip of code below for a recent chamfering operation.

Any help appreciated, I've got around it by having a 90 degree plunge angle but it's not ideal.

Thanks,
Sam

(No. 5 Hole machining: Hole 1)
G00 X13.8539 Y-3.3240 Z5.0000
G00 Z0.0000
G01 Z-0.5000 F200
G01 X13.8228 Y-3.4624 Z-0.5516
G02 X13.4722 Y-4.6429 Z-1.0000 I-13.8228 J3.4624
G02 X-13.8228 Y3.4624 I-13.4722 J4.6429 F350
G02 X13.8539 Y-3.3240 I13.8218 J-3.4607
G01 X13.8228 Y-3.4624 Z-1.0516 F200
G02 X13.6412 Y-4.1201 Z-1.3000 I-13.8228 J3.4624
G02 X-13.8228 Y3.4624 I-13.6412 J4.1201 F350
G02 X13.8539 Y-3.3240 I13.8218 J-3.4607
G01 X13.8228 Y-3.4624
G02 X13.6412 Y-4.1201 I-13.8228 J3.4624
G00 Z5.0000
G00 X0.0000 Y0.0000