CNC lathe stops intermittently at same line in the programme

[thivanka]

There is a ECOCA SJ - 35 HT CNC (control is Fanuc Oi - TD) lathe machine. It is used to machine impellers, suction flanges of pumps etc.while it is machining a particular impeller, machine stops intermittently but it occurs always at same line in the programme ( but this problem is not occuring each and every time that programme runs). once it is stopped, the word ' alarm' is shown on one place of the display and also 'hold' word appears (important - running programme is still being displayed on one side of dispaly).
*** again programme start to works and machining happens from where it stopped when we switch on the start button on the control panel.


I want to know whether this problem is due to a problem in programming or due to any other reasons. please help me quickly

HERE IS THE PROGRAMME ( THE LINE AT WHICH PROGRAMME STOPS IS IN BOLD),
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O0029(NSP IMPELLER MACHINING INITIAL PROGRAMME)


N1T1010
G50S400M03
G96S45
G0X190.Z150.
X147.9Z3.1
G1X142.5Z3.6F0.11
G2X54.Z13.3R500.F0.2
G0X55.Z26.6
X50.5
G1X0.F0.25
G0X55.Z26.7
Z24.7
X52.
G1X-1.1F0.2
G0Z24.8X45.5
G1Z15.1F0.2
G0X46.Z24.8
X41.5
G1Z24.1X43.35F0.16
Z15.1F0.25
X47.F0.32
X54.2F0.5
G0Z13.5
G1Z13.3F0.16
X43.35F0.23
Z15.7F0.4
G0X250.Z160.
T0M05
M01
N2T0404
G97S280M03
G0X295.Z40.
X0.2
Z-31.2
G1Z-32.3F0.04
Z-34.F0.07
Z-50.1F0.19
G0Z50.
X3.
T0M05
M01
N3T0808
G97S250M03
G0X39.7Z102.
Z40.
G1Z36.6F0.1
G0X38.Z39.
X43.
G1Z36.4F0.1
G0X40.Z50.
X44.Z99.
T0M05
M01
N4T0202
G97S250M03
G0X36.1Z117.
Z24.8
G1X35.27Z24.1F0.1
Z21.4F0.2
Z20.85F0.1
X16.4F0.16
G0Z25.
X45.Z110.
T0M05
M01
N5T1212 // Tool changer changed to under cut tool from boring tool
G97S200M03
G0X29.Z137.
X17.
Z5.5
Z1.75
G1Z1.2F0.14
X14.4Z-0.2F0.1
Z-10.95F0.115
X16.4F0.07
G1X13.7F0.4
G0Z140.
X18.
T0M05
M01
N6T0606
G97S230M03
X35.Z99.
X32.
Z-40.
G92X35.65Z-52.5F1.41
X35.85
X36.05
X36.15
X36.3
X36.5
X36.53
G0Z-37.X34.
Z99.
X230.
M01
M30
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