DIN/ISO Function Overview Heidenhain TNC 640/530/410/426/430/320 G Functions.
Heidenhain TNC 640 CNC
Heidenhain ISO G Codes
Tool movements
| G code | Description |
|---|---|
| G00 | Straight-line interpolation, Cartesian coordinates, rapid traverse |
| G01 | Straight-line interpolation, Cartesian coordinates |
| G02 | Circular interpolation, Cartesian coordinates, clockwise |
| G03 | Circular interpolation, Cartesian coordinates, counterclockwise |
| G05 | Circular interpolation, Cartesian coordinates, without indication of direction |
| G06 | Circular interpolation, Cartesian coordinates, tangential contour approach |
| G07 | Paraxial positioning block |
| G10 | Straight-line interpolation, polar coordinates, rapid traverse |
| G11 | Straight-line interpolation, polar coordinates |
| G12 | Circular interpolation, polar coordinates, clockwise |
| G13 | Circular interpolation, polar coordinates, counterclockwise |
| G15 | Circular interpolation, polar coordinates, without indication of direction |
| G16 | Circular interpolation, polar coordinates, tangential contour approach |
Chamfer/Rounding/Approach contour/Depart contour
| G code | Description |
|---|---|
| G24 | Chamfer with length R |
| G25 | Corner rounding with radius R |
| G26 | Tangential contour approach with radius R |
| G27 | Tangential contour approach with radius R |
Tool definition
| G code | Description |
|---|---|
| G99 | With tool number T, length L, radius R |
Tool radius compensation
| G code | Description |
|---|---|
| G40 | No tool radius compensation |
| G41 | Tool radius compensation, left of the contour |
| G42 | Tool radius compensation, right of the contour |
| G43 | Paraxial compensation for G07, lengthening |
| G44 | Paraxial compensation for G07, shortening |
Blank form definition for graphics
| G code | Description |
|---|---|
| G30 | (G17/G18/G19) min. point |
| G31 | (G90/G91) max. point |
Cycles for drilling, tapping and thread milling
| G code | Description |
|---|---|
| G83 | Pecking |
| G84 | Tapping with a floating tap holder |
| G85 | Rigid tapping |
| G86 | Thread cutting |
| G200 | Drilling |
| G201 | Reaming |
| G202 | Boring |
| G203 | Universal drilling |
| G204 | Back boring |
| G205 | Universal pecking |
| G206 | Tapping with a floating tap holder |
| G207 | Rigid tapping |
| G208 | Bore milling |
| G209 | Tapping with chip breaking |
Cycles for creating point patterns
| G code | Description |
|---|---|
| G220 | Circular pattern |
| G221 | Linear pattern |
SL Cycles, group 1
| G code | Description |
|---|---|
| G37 | Contour geometry, list of subcontour program numbers |
| G56 | Pilot drilling |
| G57 | Rough-out |
| G58 | Contour milling in clockwise direction (finishing) |
| G59 | Contour milling, counterclockwise (finishing) |
SL cycles, group 2
| G code | Description |
|---|---|
| G37 | Contour geometry, list of subcontour program numbers |
| G120 | Contour data (applies to G121 to G124) |
| G121 | Pilot drilling |
| G122 | Rough-out |
| G123 | Floor finishing |
| G124 | Side finishing |
| G125 | Contour train (machining open contour) |
| G127 | Cylinder surface |
| G128 | Cylindrical surface slot |
Coordinate transformation
| G code | Description |
|---|---|
| G53 | Datum shift in datum table |
| G54 | Datum shift in program |
| G28 | Mirror image |
| G73 | Rotation of the coordinate system |
| G72 | Scaling factor (reduce or enlarge contour) |
| G80 | Tilting the working plane |
| G247 | Datum setting |
Cycles for multipass milling
| G code | Description |
|---|---|
| G60 | Run 3-D data |
| G230 | Multipass milling of plane surfaces |
| G231 | Multipass milling of tilted surfaces |
| G232 | Face milling |
Special cycles
| G code | Description |
|---|---|
| G04 | Dwell time with F seconds |
| G36 | Spindle orientation |
| G39 | Program call |
| G62 | Tolerance deviation for fast contour milling |
| G440 | Measure axis shift |
| G441 | Fast probing |
Define machining plane
| G code | Description |
|---|---|
| G17 | Working plane X/Y, tool axis Z |
| G18 | Working plane Z/X, tool axis Y |
| G19 | Working plane Y/Z, tool axis X |
| G20 | Tool axis IV |
Dimensions
| G code | Description |
|---|---|
| G90 | Absolute dimensions |
| G91 | Incremental dimensions |
Unit of measure
| G code | Description |
|---|---|
| G70 | Inches (set at start of program) |
| G71 | Millimeters (set at start of program) |
Other G functions
| G code | Description |
|---|---|
| G29 | Transfer the last nominal position value as a pole (circle center) |
| G38 | STOP program run |
| G51 | Next tool number (with central tool file) |
| G79 | Cycle call |
| G98 | Set label number |
Cycles for drilling, tapping and thread milling
| G code | Description |
|---|---|
| G240 | Centering |
| G200 | Drilling |
| G201 | Reaming |
| G202 | Boring |
| G203 | Universal drilling |
| G204 | Back boring |
| G205 | Universal pecking |
| G206 | Tapping with a floating tap holder |
| G207 | Rigid tapping |
| G208 | Bore milling |
| G209 | Tapping with chip breaking |
| G241 | Single-lip deep-hole drilling |
Cycles for drilling, tapping and thread milling
| G code | Description |
|---|---|
| G262 | Thread milling |
| G263 | Thread milling/countersinking |
| G264 | Thread drilling/milling |
| G265 | Helical thread drilling/milling |
| G267 | External thread milling |
Cycles for milling pockets, studs and slots
| G code | Description |
|---|---|
| G74 | Slot milling |
| G75 | Rectangular pocket milling in clockwise direction |
| G76 | Rectangular pocket milling in counterclockwise direction |
| G77 | Circular pocket milling in clockwise direction |
| G78 | Circular pocket milling in counterclockwise direction |
| G210 | Slot milling with reciprocating plunge |
| G211 | Round slot with reciprocating plunge |
| G212 | Rectangular pocket finishing |
| G213 | Rectangular stud finishing |
| G214 | Circular pocket finishing |
| G215 | Circular stud finishing |
Cycles for milling pockets, studs and slots
| G code | Description |
|---|---|
| G251 | Rectangular pocket, complete |
| G252 | Circular pocket, complete |
| G253 | Slot, complete |
| G254 | Circular slot, complete |
| G256 | Rectangular stud |
| G257 | Circular stud |
Cycles for creating point patterns
| G code | Description |
|---|---|
| G220 | Circular point pattern |
| G221 | Point patterns on lines |
Cycles for multipass milling
| G code | Description |
|---|---|
| G230 | Multipass milling of smooth surfaces |
| G231 | Multipass milling of tilted surfaces |
| G232 | Face milling |
Touch probe cycles for measuring workpiece misalignment
| G code | Description |
|---|---|
| G400 | Basic rotation using two points |
| G401 | Basic rotation from two holes |
| G402 | Basic rotation from two studs |
| G403 | Compensate a basic rotation via a rotary axis |
| G404 | Set basic rotation |
| G405 | Compensating misalignment with the C axis |
Touch probe cycles for datum setting
| G code | Description |
|---|---|
| G408 | Slot center reference point |
| G409 | Reference point at center of hole |
| G410 | Datum from inside of rectangle |
| G411 | Datum from outside of rectangle |
| G412 | Datum from inside of circle |
| G413 | Datum from outside of circle |
| G414 | Datum in outside corner |
| G415 | Datum in inside corner |
| G416 | Datum circle center |
| G417 | Datum in touch probe axis |
| G418 | Datum in center of 4 holes |
| G419 | Reference point in selectable axis |
Touch probe cycles for workpiece measurement
| G code | Description |
|---|---|
| G55 | Measure any coordinate |
| G420 | Measure any angle |
| G421 | Measure hole |
| G422 | Measure cylindrical stud |
| G423 | Measure rectangular pocket |
| G424 | Measure rectangular stud |
| G425 | Measure slot |
| G426 | Measure ridge |
| G427 | Measure any coordinate |
| G430 | Measure circle center |
| G431 | Measure any plane |
Touch probe cycles for tool measurement
| G code | Description |
|---|---|
| G480 | Calibrating the TT |
| G481 | Measure tool length |
| G482 | Measure tool radius |
| G483 | Measure tool length and tool radius |
