The Bolt Circle
Put variables, trig and loops together into a real parametric program.
This is the classic. Four holes on a 40 mm circle around the G54 origin — but written so the count, the radius and the setup can all change without touching the moves.
Your turn
Drill 4 holes on a 40 mm radius circle centred on the G54 origin. Loop with #102 as the index; for each hole compute the angle into #120, the X into #121, the Y into #122, and emit a G01 X#121 Y#122 F300 move. Read the circle centre from the G54 origin registers so the program follows the setup.
The machine gives you
part zero at X50 Y25:
#5221 = 50#5222 = 25the same program with part zero at the machine origin:
#5221 = 0#5222 = 0Your program is run once for each set of conditions. It has to work for all of them.
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This is a learning simulation — always prove out a program on the actual control before you cut metal.