CC in Helix Bore?

[Matthew Hajicek - Singularity]

I've always used Contour with Ramp when I need to mill a hole, and I thought, "Hey, I should probably be using Helix Bore."  So I try it and I get cutter comp applied on arc moves.  Is there a way around this?  Maybe that's the reason I've always used Contour, my remembery isn't all that good.

[djstedman]

From my recollection this has always been bugged in some cases with Helix bore.. I know its why I have always used contour with ramp instead..

[MIL-TFP-41]

Make sure your entry/exit arc sweep is set to something besides the default 180 degrees.

[Jayson Kramer]

use perpendicular entry to get it like this.

N130 G0 G90 G54 X.0625 Y0. A0. S2139 M3
N140 G43 H2 Z2.
N150 Z.1
N160 G1 Z0. F6.42
N170 G41 D2 X0.
N180 G3 X.0625 Y-.0625 I.0625 J0.
N190 X.125 Y0. I0. J.0625
N200 X0. Y.125 Z-.02 I-.125 J0.
N210 X-.125 Y0. Z-.04 I0. J-.125

[Matthew Hajicek - Singularity]

Thanks guys, I'll give it a shot.

[Reko]

Here are my settings... Entry/exit arc sweep = 0, Start at Center checked so that the operator can see location during set up... works every time.

[gcode]

I've always used Contour with Ramp when I need to mill a hole, and I thought, "Hey, I should probably be using Helix Bore."  So I try it and I get cutter comp applied on arc moves.  Is there a way around this?  Maybe that's the reason I've always used Contour, my remembery isn't all that good.

 

On the Cut Parameter page

Change " Entry Arc Sweep" from 180 to 90

 

and make sure "Start at Center" is checked

 

this will give you a line to get CDC engaged and a nice smooth arc into the cut

 

I prefer this to the  "Perpendicular" setting which just bangs straight into the side of the hole

[Jayson Kramer]

Thanks Gcode I forgot to mention the 180 to 90 to get the cutter comp G40 off on a leaner . if left at 180° you get a arc lead off.
I do both thoughts on the start options maters on the hole.

[jeff]

Is this different than a circle mill helix entry? I'll be honest I've never used the helix bore feature.

[gcode]

Is this different than a circle mill helix entry? I'll be honest I've never used the helix bore feature.

circle mill helix entry is a roughing pass to get to a Z level wwhere the toolpath

will do the circle mill

 

helix bore perfroms the same function as you'd get with contor ramp, but you have a lot of options

for finishing the hole, that would require seperate operations using contour ramp