Latest trip to Frustration Towers i.e. the garage.
Switch On controller and reset it.
Run this little "Safe Program":
(Project Make Safe)
G17 G21 G90 G40 G49 G80
F250.0
G00 Z5.000
G00 X0.0 Y0.0 Z0.0
M30
%
Ok it runs to the end and beeps as expected Displays are 0,0,0
Run this little file (now named MT01.txt)
G00 X0.0 Y0.0
G1 X20.0 F400.0
M30
%
Ok as expected Feed Used 400, X left at 20, Beep
Run this little file (MT02.txt)
G00 X0.0 Y0.0
G1 X20.0 F400.0
G1 X30.0 F300.0
M30
%
and it stops on the line #1: G1 X20.0 F400.0 leaving x,y at 0,0
However if I run the safe program it then works as expected.