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a.laasW8M6T
248 Views, 3 Replies

Bug - Deep Drilling expanded cycle feed rates incorrect

I went to run a program I had previously run before and the positioning feedrate for the drilling cycle is F0(line 36) when is should be F150

F0.pngposfeed.png

 

If I change the feed rate to feed per rev in the tool tab then it outputs a feed rate but its only F37 when it should be F150

F37.png

 

example file and post attached

a.laasW8M6T
in reply to: a.laasW8M6T

bump

weber_dominic
in reply to: a.laasW8M6T

The Positioning Spindle Speed is 500U/min and with a Feedrate of 0.0739845 you get 37mm/min

a.laasW8M6T
in reply to: a.laasW8M6T

Ahh yes that makes sense

 

The default expression for calculating the feed per rev is incorrect, its using the spindle speed for drilling rather than the positioning spindle speed:

positioning.png

 

If if I update the expression it works correctly, but I'm not sure why it is posting F0 when the feed per rev checkbox is not selected.

FYI Heidenhain doesn't use feed per rev at all so it kind of redundant here