Mirror Image and Cutter Compensation

Classic Control - Mill Operator's Manual

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Turning on Mirror Image for only one of the X or Y axes causes the cutter to move along the opposite side of a cut. The control automatically switches the cutter compensation direction (G41, G42) and reverses the circular motion commands (G02, G03) as needed.

When milling a shape with XY motions, turning on Mirror Image for just one of the X or Y axes changes climb milling (G41) to conventional milling (G42) and/or conventional milling to climb milling. As a result, the type of cut or finish may not be what was desired. Mirror imaging of both X and Y eliminates this problem.

Mirror Image and Pocket Milling

Program Code for Mirror Imaging in the X-Axis:

% O61011 (G101 MIRROR IMAGE ABOUT X AXIS) ; (G54 X0 Y0 is at the center of part) ; (Z0 is on top of the part) ; (T1 is a 0.250 in. diameter endmill) ; (BEGIN PREPARATION BLOCKS) ; T1 M06 (Select tool 1) ; G00 G90 G40 G49 G54 (Safe startup) ; G00 G54 X-.4653 Y.052 (Rapid to 1st position) ; S5000 M03 (Spindle on CW) ; G43 H01 Z.1 (Activate tool offset 1) ; M08 (Coolant on) ; (BEGIN CUTTING BLOCKS) ; G01 Z-.25 F5. (Feed to depth of cut) ; M98 P61012 F20. (Call contour subprogram) ; G00 Z.1 (Rapid retract above part) ; G101 X0. (Mirror imaging on for X Axis) ; X-.4653 Y.052 (Rapid to 1st position) ; G01 Z-.25 F5. (Feed to depth of cut) ; M98 P61012 F20. (Call contour subprogram) ; (BEGIN COMPLETION BLOCKS) ; G00 Z0.1 M09 (Rapid retract, Coolant off) ; G100 X0. (Mirror imaging off for X Axis) ; G53 G49 Z0 M05 (Z home, Spindle off) ; G53 Y0 (Y home) ; M30 (End program) ; % % O61012 (G101 CONTOUR SUBPROGRAM) ; (Subprogram for pocket in O61011) ; (Must have a feedrate in M98) ; G01 X-1.2153 Y.552 (Linear move) ; G03 X-1.3059 Y.528 R.0625 (CCW arc) ; G01 X-1.5559 Y.028 (Linear move) ; G03 X-1.5559 Y-.028 R.0625 (CCW arc) ; G01 X-1.3059 Y-.528 (Linear move) ; G03 X-1.2153 Y-.552 R.0625 (CCW arc) ; G01 X-.4653 Y-.052 (Linear move) ; G03 X-.4653 Y.052 R.0625 (CCW arc) ; M99 (Exit to Main Program) ; %

Be aware: Many service and repair procedures should be done only by authorized personnel. The service technicians at your Haas Factory Outlet (HFO) have the training, experience, and are certified to do these tasks safely and correctly. You should not do machine repair or service procedures unless you are qualified and knowledgeable about the processes.

Danger: Some service procedures can be dangerous or life-threatening. DO NOT attempt a procedure that you do not completely understand. Contact your Haas Factory Outlet (HFO) and schedule a service technician visit if you have any doubts about doing a procedure.

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