Maybe I missed it, what tool did you have?
My favourite small feedmills are Tungaloy dofeed.
I had a wounded (previously crashed) 5/8 feedmill from iscar. it was only 2" long but I ground the shank back so i had 2.9" stickout.
After discussing with my boss, we bought another, 3 inch version.
https://www.iscar.com/eCatalog/Item.aspx?cat=3105629&fnum=2793&mapp=ML&GFSTYP=I&srch=1
We've had nothing but good results with these tools on larger versions, just trying to dial in this smaller one.
While I'm here, some other suggestions would be appreciated. here is a snippet of the code for this tool:
Code:
O6003( FEEDMILL SUB 5/8)
G0 X-.6748 Y.0582 S4000 M3
G0Z.1
G1Z0.F50
G41 G1 X-.6768 F120. D87
Y-.4699 Z-.0055
G3 X-.6668 Z-.0057 I.005
G1 Y.4699 Z-.0155
G3 X-.6768 Z-.0156 I-.005
G1 Y.0582 Z-.0199
Y-.4699 Z-.0254
G3 X-.6668 Z-.0256 I.005
G1 Y.4699 Z-.0354
G3 X-.6768 Z-.0356 I-.005
G1 Y.0582 Z-.0399
Y-.4699 Z-.0454
G3 X-.6668 Z-.0455 I.005
G1 Y.4699 Z-.0553
G3 X-.6768 Z-.0555 I-.005
G1 Y.0582 Z-.0598
Y-.4699 Z-.0653
G3 X-.6668 Z-.0655 I.005
G1 Y.4699 Z-.0753
G3 X-.6768 Z-.0754 I-.005
G1 Y.0582 Z-.0797
Y-.4699 Z-.0852
G3 X-.6668 Z-.0854 I.005
G1 Y.4699 Z-.0952
G3 X-.6768 Z-.0954 I-.005
G1 Y.0582 Z-.0997
Y-.4699 Z-.1052
etc..
I have seen the suggestion in this thread about just zig-zagging it back and forth down the center. Would that be better than my current "racetrack" ramp down? And I assume if I did that, I'd be wanting to go down about .010" each way so the cut would be .020" deep by the time it reaches the other end of the slot?
Or should I keep the racetrack path? And should I keep the same depth per pass that I have? While I am going down .020" per lap, it is basically just a .010" depth of cut because the slot is so narrow. So should I double my depth?
For reference, iscar's recommendation is .020-.031" depth of cut and .027-.040 ipt. 400-650sfm
Now that I'm writing that, I realize I've programmed the rpm too high and the chip load too low for the rpm. Maybe I should be running 3000rpm at 162ipm?
Sorry for so many questions. Totally don't wanna crash the good tool when it gets here lol.