TK: Fanuc vs EMC/NIST Radius Compensation Entry Move Styles

2016-11-17T02:21:14Z

Fanuc vs EMC/NIST Radius Compensation Entry Move Styles

TK: Internal/concave Path Tool Radius Compensation Example G41/G42

2016-08-27T00:08:41Z

Internal/concave Path Tool Radius Compensation Example G41/G42

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Internal/concave paths must not be angled as it is impossible for a round tool to follow such a path without gouging. Instead arcs must be used with a radius larger than the tool radius. Here is a GCode Example showing a possible internal path and the resulting tool center path with tool radius compensation turned on.

Note a carefully chosen entry move with a convex corner must be made to avoid gouging the path.

[[File:InternalCountourG41.png|none|500x347px]]

'''The G Code:'''

( Tool Table should contain: ) ( Slot 1 Length 0.000 Diam 0.500 ) G49 G40 G54 G20 (inches mode) G0 x1y0z0 (Path with no compensation) T1 M6 F120 G1X4 G3X5Y1I0J1 G1Y4 G3X4Y5I-1J0 G1X1 G3X0Y4I0J-1 G1Y1 G3X1Y0I1J0 G0 x2y3z0 G41 D1 (Tool #1 Radius comp Left of contour) F60 G1X2Y1 G3X3Y0I1J0 G1X3Y0 G1X4 G3X5Y1I0J1 G1Y4 G3X4Y5I-1J0 G1X1 G3X0Y4I0J-1 G1Y1 G3X1Y0I1J0 G1X3 G40 G0X2y3z0 M30

← Older revision		Revision as of 02:21, 17 November 2016
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	( Tool Table should contain: )<br />( Slot 1 Length 0.000 Diam 0.500 )<br /><br />G49 G40 G54<br />G20 (inches mode)<br /><br />G0 x1y0z0 (Path with no compensation) <br />T1 M6<br />F120<br />G1X4<br />G3X5Y1I0J1<br />G1Y4<br />G3X4Y5I-1J0<br />G1X1<br />G3X0Y4I0J-1<br />G1Y1<br />G3X1Y0I1J0<br /><br />G0 x2y3z0 <br />G41 D1 (Tool #1 Radius comp Left of contour) <br />F60<br />G1X2Y1<br />G3X3Y0I1J0<br />G1X3Y0<br />G1X4<br />G3X5Y1I0J1<br />G1Y4<br />G3X4Y5I-1J0<br />G1X1<br />G3X0Y4I0J-1<br />G1Y1<br />G3X1Y0I1J0<br />G1X3<br />G40<br />G0X2y3z0<br />M30		( Tool Table should contain: )<br />( Slot 1 Length 0.000 Diam 0.500 )<br /><br />G49 G40 G54<br />G20 (inches mode)<br /><br />G0 x1y0z0 (Path with no compensation) <br />T1 M6<br />F120<br />G1X4<br />G3X5Y1I0J1<br />G1Y4<br />G3X4Y5I-1J0<br />G1X1<br />G3X0Y4I0J-1<br />G1Y1<br />G3X1Y0I1J0<br /><br />G0 x2y3z0 <br />G41 D1 (Tool #1 Radius comp Left of contour) <br />F60<br />G1X2Y1<br />G3X3Y0I1J0<br />G1X3Y0<br />G1X4<br />G3X5Y1I0J1<br />G1Y4<br />G3X4Y5I-1J0<br />G1X1<br />G3X0Y4I0J-1<br />G1Y1<br />G3X1Y0I1J0<br />G1X3<br />G40<br />G0X2y3z0<br />M30
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		+	==Fanuc vs EMC/NIST Radius Compensation Entry Move Styles==
		+	A new Fanuc Style Radius Compensation Entry Move has been added. To Select which type of Entry move should be performed add a setting to the GCode Interpreter Settings file as shown below. KMotionCNC specifies the GCode Interpreter Settings File to be used in the [http://dynomotion.com/Help/KMotionCNC/ToolSetupScreenFiles.htm#Setup_File Tool Setup \| Setup Files] section. The first value after comp_entry_style will be the selected type.
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		+	comp_entry_style FANUC_COMP_ENTRY_STYLE EMC_COMP_ENTRY_STYLE
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		+	The Original EMC Entry Style type performed an immediate movement to a tangent point as shown below:
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		+	[[File:emc_comp_entry_style.png\|none\|link=]]
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		+	The New Fanuc TYPE A Entry Style delays movement of the entry move until a successive line or arc is specified. It then performs the entry move to a position tangent to the beginning of the successive line or arc. No gouging warnings or errors are generated. The system assumes it is proper to move to the tangent point. Only Type A is currently supported.
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		+	[[File:fanuc_comp_entry_style.png\|none\|link=]]
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		+	This GCode utilizes the Fanuc Entry style to perform a tight helix bore. The code was designed for a nominal tool diameter of 0.194 inches
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		+	(T1 D=0.194 CR=0. - ZMIN=-0.2 - flat end mill)<br />G90 G94 G17 G40<br />G20<br />G53 G0 Z0.<br /><br />(Bore2)<br />T1 M6<br />S2500 M3<br />G56<br />M8<br />G0 X0.563 Y0.<br />G43 Z0.18 H1<br />G1 Z0.1 F10.<br />G41 X0.5285 Y0.122 D1<br />G3 X0.4065 Y0. I0. J-0.122<br />X0.4071 Y0.0136 Z-0.0479 I0.1565 J0.<br />X0.7194 Y-0.0068 Z-0.124 I0.1559 J-0.0136<br />X0.4065 Y0. Z-0.2 I-0.1564 J0.0068<br />X0.7195 I0.1565 J0.<br />X0.4065 I-0.1565 J0.<br />X0.5285 Y-0.122 I0.122 J0.<br />G1 G40 X0.563 Y0.<br />G0 Z0.18<br /><br />M5<br />M9<br />G53 G0 Z0.<br />G53 X0. Y0.<br />M30
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		+	Here is a Plot of the result:
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		+	[[File:HelixBore.png\|none\|link=]]
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		+	Orthogonal Top View
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		+	[[File:HelixBoreTopView.png\|none\|link=]]

Internal/concave Path Tool Radius Compensation Example G41/G42 - Revision history

TK: Fanuc vs EMC/NIST Radius Compensation Entry Move Styles

TK: Internal/concave Path Tool Radius Compensation Example G41/G42