Week 10: CNC Machines (Tool function, Practical application of tool wear offset, feed function, spindle function)

Tool selection
Tool selection is accomplished using 'T' function followed by a four digit number where, first
two digits are used to call the particular tool and last two digits are used to represent tool
offset in the program. The tool offset is used to correct the values entered in the coordinate
system preset block. This can be done quickly on the machine without actually changing the
values in the program.
Using the tool offsets, it is easy to set up the tools and to make adjustments
Feed rate control
Cutting operations may be programmed using two basic feed rate modes:
1. Feed rate per spindle revolution
2. Feed rate per time
The feed rate per spindle revolution depends on the RPM programmed.

 

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