need some help.... would like to turn off Spindle with an on-screen - button...
but which code should i place in this button?

it should always work.... also within running g-code program...

tried to turn off Spindle during running G-code.....
seems to be " not possible  ", only with stopping  or pausing the running g-code...

or could I make an "dry-running" button, which could turn off the spindle before starting
the g-code - and with this button activated, the g-code can´t start the spindle?

is there a tricky solution?
any ideas welcome...
thanks
timmi