Spindle won't come on after a tool change <resolved fusion post >

[grossmsj]

This is an odd one.
Running a program and it goes to do a tool change. That works smoothly, but the spindle won't come on. The machine proceeds on like everything is working fine but the spindle isn't running. I shut the program down and after that I can't get the spindle to come on, even though MDI commands. (also tried spindle warmup routine, and other things like that). There is no error code in the VFD.
The only way to get the spindle to turn on again is to reboot the Acorn.
Any ideas?

[cnckeith]

post the offending g code program.
do you have the VCP spindle button in MAN mode or AUTO? AUTO = listens to G code program, MAN = listens to the VCP buttons

[grossmsj]

The VCP spindle button was in auto mode throughout. I switched it to Manual after the run to see if I could start it that way.
The G-code file is attached, but the offending code segment is as follows (from Swissi's Fusion PP):
N59795 X0. Z1.3638
N59800 X-0.0292 Z1.3731
N59805 X-0.0417 Z1.401
N59810 G0 Z1.769
(Rotary Parallel8)
N59820 G28 G91 Z0.
N59825 G90
N59830 M1
N59835 T25 M6
N59840 S16000 M3
N59845 E12
N59850 M11
N59855 G0 A13410.
N59865 G0 X0. Y-0.0425
N59870 G43 Z2.5147 H25
N59875 A13410.

[suntravel]

Make sure that the TTO is not tripped after a tool change.

Check the Input pls.

After a restart you get MSG 4077 TTO cleared

Uwe

[cncsnw]

See also:
https://centroidcncforum.com/viewtopic.php?f=60&t=6208
and:
https://centroidcncforum.com/viewtopic. ... 528#p88528

Try using the Alt-i display (the full version, not the "user friendly" version, see Parameter 422); or the PLC Detective Watch window, to see whether MEM232 "ChuckOpenCloseComplete_M" is getting turned off.

You could also use the PLC Detective Source view to look at lines 3849-3855, lines 4554-4559, and lines 5598-5626 to see what is happening with your spindle-start requests and the "ChuckOpenCloseComplete_M" inhibit.

[grossmsj]

Excellent information cncsnw! I'll go through this today.

I'll look into it Uwe. It has just started doing that on startups over the last few weeks.

[grossmsj]

or the PLC Detective Watch window, to see whether MEM232 "ChuckOpenCloseComplete_M" is getting turned off.

That seems to be the problem here. MEM232 starts set at 1, it completes the first cycle of the program, begins the tool change and MEM232 is changed to 0. It does not change back to 1.

Two questions:
1) How do I fix this? It doesn't do it for every program. But I REALLY need to run this program.
2) What is the function of that variable? My setup is very simple. No VFD_Enable (just SpinFWD), UnclampTool is output 7 and I'm using M15/M16 to clamp and unclamp. Is there something I can do to get around this, if even temporarily?

[cncsnw]

Can you narrow down exactly what action, presumably within your tool-change sequence, causes MEM232 to change to 0?

For example, if you repeatedly run M15 and M16 at the MDI prompt, does MEM232 change?

If not, then try stepping through an M6 tool change in single-block mode (with Parameter 10 = 3) so you can see when it does change to 0.

[grossmsj]

Great! Thanks again.
Scott

[cncsnw]

I am betting your problem is triggered by the M11, because your Acorn PLC program seems to include lathe code that assumes M11/M10 are used to open and close an auto chuck.