Spindle M4 ?? no..

[nikigio]

Can anyone explain to me how I make the spindle turn counterclockwise M4???
I use uccnc.
Thank you
I am interested in this solution but m4 must work.

Qualcuno può spiegarmi come faccio a far girare il mandrino in senso antiorario M4???

Uso uccnc.
Grazie
Sono interessato a questa soluzione ma deve funzionare m4.

[micknm]

Enter a negative speed.

I'm assuming you have or will have left-handed tooling. I've seen people look at a downcut spiral and assume it was for left-handed (counter-clockwise rotation) cutting.