[jhartleyjr]

When I do parallel finishing and other finishing tool paths, the feed rate drops from 2000 mm/min to about 600. I use VisualMill and the g code output shows many small line segments instead of arcs. Maybe this is the problem because the Fanuc 0i MC has a limited look ahead capability? What needs to change in the code so the feed rate does not show down so much?

Thanks for your help.

John

%
(1Fanuc0i-MC1xxx post)
N10 G17G21G40G49G80G90G94
N11 G10L2P1X0.Y0.Z0.
N12 G08P1
N13 G0G90X0.Y0.
(tool load)
N14 G30G91Z0T4 M6
N15 G90 G54 X0.0 Y0.0 S9000M3
N16 G43H4 Z50.45 M08 F5000.
N17 G1X0.542Y-27.593 F5000.
N18 Z8.633 F1828.
N19 Z8.033 F1371.
N20 Y-27.605Z8.087 F2000.
N21 Y-27.681Z8.294 F2000.
N22 Y-27.757Z8.481 F2000.
N23 Y-27.872Z8.722 F2000.
N24 Y-28.139Z9.241 F2000.
N25 Y-28.215Z9.361 F2000.
N26 Y-28.292Z9.452 F2000.
N27 Y-28.445Z9.597 F2000.
N28 Y-28.597Z9.714 F2000.
N29 Y-29.208Z10.111 F2000.
N30 Y-29.361Z10.196 F2000.
N31 Y-29.513Z10.254 F2000.
N32 Y-29.666Z10.284 F2000.
N33 Y-29.972Z10.288 F2000.
N34 Y-31.193Z10.283 F2000.
N35 Y-31.346Z10.251 F2000.

[bertus.nl]

i think te problem is the G08P1
this code makes te milling go smoother ,but decelerate the table feed at the end of the path.

you can also remove al the feedrates exept the first ,because the feedrate is nominal. and is beter for memory.

instead of G08 you can try G05.1 Q1 does a simylar thing (reading ahead)

greatings bertus.nl

[jhartleyjr]

Hi bertus.nl

Thanks for your comment. I look up G05.1 and it looks very promising. I have never used this command and really don't know much about g code. Can I just turn it on in a block after the first tool change and leave it on for all machining operations?

thanks,

John