Gee Two Zero: Machine Function Set Imperial Units
G20 Commands the machine to consider input programs as Imperial Units
Syntax:
G20 this will cause the machine to see move and position entries in the program, as Imperial Units
- G20 Can be seen as a “Declaration” code, used in the second line of your program along with any other codes you want to affect the entirety of what you are going or at the beginning of a canned cycle unit to affect only that unit (until changed by G21)
Caution: This in effect tells the control to see what your program has in it are imperial units, it’s a REALLY bad idea to stick in a metric program and just try to run it G20. In general if you run Imperial then get into the habit of programming Imperial, same with Metric, if you run Metric then program Metric. Consistency is the key here.
Problems: if you have say Z-2. as a U-Drilling depth and you have used G20 that 2. will be INCHES NOT MM’s.
G20 Is A Modal Command