A Circle Milling Custom Macro

A Circle Milling Custom Macro

by Steven Andrews of H & L Tooling

HAVE RECENTLY STARTED PROGRAMMING IN MACRO B AND HAVE WRITTEN THIS PROGRAM TO CUT PILLAR HOLES, ETC IN MOULD PLATES. THIS PROGRAM CUTS A HOLE OF ANY DIAMETER AT ANY POSITION WITH ANY DEPTH OF CUT USING ANY DIAMETER CUTTER. THERE IS NO NEED FOR RADIUS COMPENSATION AS YOU CAN CHANGE THE CUTTER DIAMETER OR THE HOLE DIAMETER TO GET THE SIZE YOU REQUIRE. YOU CAN SET THE DEPTH OF CUT TO MORE THAN THE TOTAL DEPTH OF THE HOLE TO JUST TAKE ONE CUT. THE 180 DEG. LEAD-IN AND LEAD-OUT WITH A RADIUS PLACES LESS STRAIN ON THE CUTTER AS IT COMES INTO CONTACT WITH THE MATERIAL TO BE CUT. HERE IS THE PROGRAM :
• :8000(PILLAR HOLES)
• #100=1.0(CUTTER DIAMETER)
• #101=30.0(X CENTRE)
• #102=30.0(Y CENTRE)
• #103=0.0
• #104=30.0(DEPTH OF HOLE)
• #105=50.0(DIA OF HOLE)
• #106=3000(SPNDLE SPEED)
• #107=500.0(FEED)
• #108=10(TOOL POS)
• #110=20.0(DEPTH OF CUT)
• G00G91G28Z0.0
• G91G28X0.0Y0.0
• T#108M06
• G00G90G54X#101Y#102S#106M03
• G43Z10.0H#108M08
• N1WHILE[-#104LE#103]DO1
• #103=[#103-#110]
• IF[-#104GT#103]GOTO20
• G1Z#103F[#107/3]
• G03X[#101+#105-#100/2]R[[#105-#100]/4]F#107 I-[#105/2-#100/2]J0.0
• X#101R[[#105-#100]/4]
• G00Z10.0
• END1
• N20#103=-#104
• G01Z#103F[#107/3]
• G03X[#101+#105-#100/2]R[[#105-#100]/4]F#107[[#10-#100]/4]
• G00Z10.0 M09
• G00G91G28Z0.0
• G91G28X0.0Y0.0
• M30
courtesy http://www.cncci.com/resources/tips/cicle%20mill.htm