ATC + TOOL_CHANGE_QUILL_UP

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04 May 2019 15:05 #132740 by HalaszAttila
Hello,
a working on retrofit Emco VMC100 milling machine.
Before changing the tool (rotating the magazin), Z axis must move to top end position (Z machine coord = 0.0 mm) (restricted area).
I solved this whit setting the TOOL_CHANGE_QUILL_UP = 1 in INI file.

But, would be required to inhibit (motion.feed−inhibit) the axis motion when machine is not in tool change execution,
and Z axis enter in restricted area (halui.axis.N.pos−feedback > -85.0 - checked with comp.N. component)).


-My plan was to use iocontrol.0.tool−change signal to disable checking the position of Z axis and inhibit the motion when it goes above -85.0mm, but this signal is set after moving Z up.
-My second plan was to check the state of motion.motion−type signal (4: Tool change). But when moving Z axis during tool change the value of variable is 1: Traverse (like rapid move), not 4: Tool change (when would be this variable equal 4? )
-My third plan is to remap M6, but is seems complicated, because i do not find docs how to do it.

Can you help me how to solve this problem, easy?

Thanks. :)





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04 May 2019 18:53 #132762 by andypugh
Replied by andypugh on topic ATC + TOOL_CHANGE_QUILL_UP
I would use M6 remap. Then the quill up is a g53 g0 move.

linuxcnc.org/docs/2.7/html/remap/remap.h...s_including_tt_m6_tt

This section explains the minimum way to do an M6 remap.
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08 May 2019 14:22 #133146 by HalaszAttila
Thanks for suggestion.

I first time try to use M6 remap, and write a atc.ngc file, and it works - sometimes.

1-2 times out of 10 tool changing, the line after M6 in atc.ngc stops, and not executed to end.
The line after M6 (in remap) is G53 G0 Z-92 this moves Z axis back to safety zone (disconnect spindle from the magazin).

When executing the atc.ngc file (Called T1M6 from G code program), every time the M6 (in ngc file) is finished properly (the magazin rotated to desired position and in HAL file i set the iocontrol.0.tool−changed pin),
and after linuxcnc starts executing next line (G53 G0 Z-92) moving Z down but after few mm (not fix length!!! sometimes few tenth mm, sometimes 2-3mm) the moving stops and the tool changing is finished with no error, no message. It seems everything is finished properly, but unfortunately the magazin is stays in restricted area - connected with magazin, and if in the G code program after tool change T1M6 follow spindle start S5000 M3 it will rotate the magazin with high speed and something will brake. Ufffff.

I attached the ngc file.
Please can someone help me what i made wrong?

I use <on_abort> macro. But it not called, that means the atc.ngc finished properly by LinuxCNC.

INI section for remap:

ON_ABORT_COMMAND=O <on_abort> call
# REMAP:
REMAP= M6 modalgroup=6 ngc=atc

[PYTHON]
# where to find Python code
PATH_PREPEND=python
# import the following Python module
TOPLEVEL=python/toplevel.py
# the higher the more verbose tracing of the Python plugin
LOG_LEVEL = 8

File Attachment:

File Name: atc.ngc
File Size:0 KB
Attachments:

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08 May 2019 14:39 - 08 May 2019 14:39 #133148 by bevins
Replied by bevins on topic ATC + TOOL_CHANGE_QUILL_UP
Try a G4 P3 after the G0 -Z move.
Last edit: 08 May 2019 14:39 by bevins.
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08 May 2019 15:09 #133151 by andypugh
Replied by andypugh on topic ATC + TOOL_CHANGE_QUILL_UP
I wonder if you are setting the "tool changed" pin too early and that (somehow) interrupts the sequence?
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08 May 2019 15:22 - 08 May 2019 15:33 #133153 by HalaszAttila
I tried to delay the tool-changed signal with timedelay (on-time = 0.1 sec). But nothing changed.


I tried that comment out the tool changing section from HAL (carousel comp etc). And the tool-changed pin is simulated:

iocontrol.tool-change timedelay..in
timedelay..out iocontrol.tool-changed.

timedelay ON time: 2.0 sec.

But not solved the problem.


I will try to put G4 P3 before M6 based on previous Replay.
Last edit: 08 May 2019 15:33 by HalaszAttila.

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08 May 2019 15:45 #133157 by bevins
Replied by bevins on topic ATC + TOOL_CHANGE_QUILL_UP
I think it needs to be in the sub

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09 May 2019 11:04 #133234 by HalaszAttila
Hmm it seems that problem is from turned on tool offset compensation (G43) during tool change.

When i put on the beginning of atc.ngc a G49 code to turn off compensations, the tool changing is gone without problem (dont stops G53 G0 Z-92 moving after M6).

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09 May 2019 12:40 #133236 by bevins
Replied by bevins on topic ATC + TOOL_CHANGE_QUILL_UP

HalaszAttila wrote: Hmm it seems that problem is from turned on tool offset compensation (G43) during tool change.

When i put on the beginning of atc.ngc a G49 code to turn off compensations, the tool changing is gone without problem (dont stops G53 G0 Z-92 moving after M6).


That's weird because G53 should still work even with offsets.

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09 May 2019 12:56 #133237 by HalaszAttila
On the graphics seems that (in executing atc.ngc) after finished M6 the coordinate system moves according to Z offset, after that will move Z axis down with G53 G0Z-92 line. This line interrupted after a little time (but without error or message).

With G49 on the beginning of atc.ngc the problem solved.
What you think, can i use it in this form safety?

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