Understanding of making chamfer on wrapped cylinder

[krisGPB83]

Hi. I have some problems with simple chamfer around the hole on a cylinder.

Data:

-Machine DOOSAN Puma 2600 with Y axis

-Cycle used is 2D contour with wrapped toolpath:

-tool 8mm chamfer tool 45deg

-chamfer needs to be 1mm

-postprocessor standard doosan mill-turn fanuc.cps version 43994 from Fusion

I have few problems with it:

1. Feedrate. I have set 1000mm/min. Software thinks it is 1000 by checking toolpath data but the output .nc file have feedrate value on nearly every line of the code. Is that right? No feedrate optimisation is used. Why Fusion does that?

2. Chamfer Width. If it's set to 1mm as required machine makes it massive (approx 2mm). So I need to guess the chamfer width and currently it's set to 0.4mm in fusion to get it around 1mm on the actual part.

3. Uneven chamfer width on actual part. Should the fusion generate also X movement (up and down) to suit even chamfer width?

.f3d file attached with this post. If you need anything else please let me know.

[seth.madore]

A) Does your machine support Inverse Time?

B) The size difference is not unexpected, as Wrap and 2D Contour doesn't understand that the compensation point needs to change as the tool approaches the centerline of the hole (along the X/Z axis)

If accurate size IS required, I advise that you model your chamfer and use a 3D toolpath to produce the feature.