Fagor alarm 1085: Helical path programmed wrong

What it means

In a helical interpolation (G02/G03 with plane axes plus third-axis K pitch), the requested height cannot be reached with the programmed helical pitch given the arc travel in the plane. The relationship among endpoint, arc length and K is inconsistent, so execution stops.

Likely causes

• K pitch value does not divide evenly into the required Z rise
• plane end point edited without updating the height/pitch pair
• sign error making the pitch work against the direction of travel