Q: We have a TK36 CNC lathe with GSK980TDa CNC system, the CNC always alarm for “Non- Monotonous” in the finishing path, is there anything wrong for below program?

G97 G99

M3 S500

T0101

G0 X124.

Z2.

G71 U3. R0.5

G71 P11 Q22 U0.8 W0.05 F0.2

N11 G0 X0

G1 Z0 F0.1

G3 X107. Z-9.3 R158.53 F0.08

N22 G1 X124.

G0 Z80.

M30

A: X and Z dimensions must be changed monotonously (always increasing or reducing) for the finishing path.

GSK 980 TDa Specification:

http://www.cncmakers.com/cnc/controllers/CNC_Controller_System/GSK980TDa.html