Mazak QT200 MY Y axis issue?

[sherriff1990]

HI there, we have been using fusion to program our mazak QT200 MY and it's been working great.

Yesterday we programmed and ran a new job that is primarily milling operations. all was good on most parts and then it had to run a contour along the face of the part and then around the part, all with the same tool.

So  the order is - run across the part (30mm distance), then go around 3 sides on  the face, and then all 4 sides.

The program did the first perfectly - heading to location, moving the Yaxis and then machining. however at the end of the op it didnt move the Y axis, and the following 2 ops didnt either, insted using the C axis to rotate and mill the part (often is the case anyway) however because the Y axis was in the position left by the last op it went across the whole part instead when it rotated.

To check this, i posted each op individually and it works correctly. but as an entire program it doesnt correct the Y position and then scraps the job.

is there a solution to this? either by editing the post processor or changing the way which it's programmed?

I have included part of the program to show what i mean (the last section called slot goes on but i havent posted it all) so finish step 3 works fine - you can see the Y moves, the other's dont then use or reposition the Y and this is the issue.

G18 G40 G80 G99
G0 G53 X0. Y0.
G53 Z0.

N1(FINISH STEP 3)
G53 X0. Y0.
G53 Z0.
M200
G53.5
G98 G17
G0 G53 H0.
T0808
G97 S5000 M203
M212
G0 C0.
M210
G0 Z20.
X38. Y14.45
M8
Z1.9
G1 Z0.9 F500.
Z-1.175
Y-14.45 F1000.
G0 Z20.

(FINISH STEP END 2)
M200
M212
G0 C0.
G17 XC
G12.1
G1 X-57. C8.45 Z20. F1500.
Z1.9
Z0.9 F500.
Z-1.175
X21. F1000.
G2 X27. C5.45 R3.
G1 C-5.45
G2 X21. C-8.45 R3.
G1 X-39.
X-57.
Z20. F1500.
G13.1

(FINISH STEP END 3)
G0 C0.
G17 XC
G12.1
G1 X41.548 C-13. Z20. F1500.
Z1.9
Z0.9 F500.
Z-9.025
X-38. F1000.
G2 X-45. C-9.5 R3.5
G1 C9.5
G2 X-38. C13. R3.5
G1 X41.548
G2 X47.548 C10. R3.
G1 C-10.
G2 X41.548 C-13. R3.
G1 Z20. F1500.
G13.1

(SLOT 2)
G0 C0.
G17 XC
G12.1
G1 X-4.972 C-0.2 Z15. F1500.
Z1.9
Z0.75 F1000.
X-4.957 Z0.658
X-4.915 Z0.569
X-4.846 Z0.483
X-4.752 Z0.404
X-4.635 Z0.333
X-4.497 Z0.272
X-4.342 Z0.222
X-4.174 Z0.185
X-3.996 Z0.161
X-3.813 Z0.15
X0.6 Z0.073
G3 X1. C0. Z0.062 R0.2
X0.6 C0.2 Z0.051 R0.2
G1 X-18.6 Z-0.284
G3 X-19. C0. Z-0.295 R0.2
X-18.6 C-0.2 Z-0.306 R0.2

[AchimN]

Thanks for your feedback.

Can you please share your CAM file including the toolpathes you mentioned?

[sherriff1990]

Sure, here is the file.

allpaths work except until you get to T8.

the first one is correct,then it goes funny from there.

didn't run tool 5 as the job was then scrapped so didnt have the clearence but except it would be fine after the tool change.

posted 'Slot 2' and it behaves perfectly if done seperatly. done as one whole job and it wants to mill way off in the wrong position.

thank you

[AchimN]

I probably found the issue, i´ve sent you an email with the updated post.
Please provide feedback since we would like to update the post library with that fix as well if its working as desired 🙂