5238-E P-10SECTION 1 PROGRAM CONFIGURATIONS10. Determining Feedrate for Cutting along C-Axis10-1. Cutting by Controlling the C-axis OnlyAlthough it is possible to machine a workpiece by controlling the C-axis, tool movement distance inunit time (one minute) differs according to the diameter of the position to be machined because thefeedrate is specified in units of deg/min. This must be taken into consideration when making aprogram.[Memo]To match the unit of the C-axis feed command with the X- and/or Z-axis command, the feedratecommand (F) should be calculated by converting 360 into 500 mm. This conversion should also becarried out when only a C-axis command is given.Example:LE33013R030030013000190°90°200φ50φAxis movement distance along slot A: ⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅π × 50/4 = 39 mmAxis movement distance along slot B: ⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅π × 200/4 = 156 mmTherefore, if cutting is carried out at a feedrate of 100 mm per minute,the feedrate (deg/min) of the C-axis is calculated as follows:Along slot A(deg/min)⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅100/39 × 90 = 230Along slot B(deg/min)⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅100/156 × 90 = 58Convert the unit of feed from "deg/min" into "mm/min".Slot A: (mm/min)⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅230/360 × 500 = 320 (F320)Slot B: (mm/min)⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅58/360 × 500 = 80 (F80)BA
