Apr 22

Apr 22 Programming a Counter-Clockwise Arc on a Lathe

Matthew Schowalter, CMfgT

CNC Machining, CNC Programming, Machining

G3 Example

The code to program a G3 counter-clockwise arc on a lathe is: G3X______ Z_______ R_______

O0016 (PROGRAM NUMBER)

(LATHE PART)

G50S2500 (MAXIMUM SPINDLE SPEED)

T0101 (TOOL CALL, TOOL OFFSET CALL)

G96S500M3 (CONSTANT SURFACE SPEED, TURN SPINDLE ON AT 500RPM)

(TURNING OPERATION)

G0G54G90X1.00Z0.1M8 ( G54 WORK COORDINATE, RAPID TO X1.0, Z.1, COOLANT ON)

G1G99Z-2.0F.003 (TURN PART TO X1.0, Z-2.0)

G3X2.0Z-2.5R.5 (CUT RADIUS)

G1Z-4.0 (TURNS PART TO Z-4.0)

G0X2.5 (RAPID TO X2.5)

G0Z.1 (RAPID TO Z.1)

G0X6.5M9 (RAPID TO X 6.5, COOLANT OFF)

M30 (END OF PROGRAM)

Leave a comment

Matthew Schowalter, CMfgT

Matthew started his manufacturing career while in high school as a youth apprentice. He went on to study Tool and Die making while pursuing a apprenticeship. Upon completion of the 10,400 hour apprenticeship he used his Journeyman Tool and Die making skills to make tooling for the motorcycle industry. From there he spent ten years making surgical instrumentation for spinal surgery, while leading the machining department. He most recently became a manufacturing engineer at a global manufacturing company, while focusing on machining processes. He started this website after researching what kind of information people pursuing or starting a manufacturing career need to succeed, and how the information should be presented.