G17 G18

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05 Apr 2021 18:40 #204932 by rider-83
G17 G18 was created by rider-83
I have in my .INI file for my start up code G18,
However, gmoccapy still displays G17
If I have G18 in my cnc code, gmoccapy still displays G17

If I type G18 in MDI, then gmoccapy displays G18, but then instantly reverts back to G17 when the cnc program begins, however the machine behaves correctly as it should do under G18.
It would appear it behaves correctly, but doesn't display the correct model G-Plane currently active.
Am I doing something wrong?

Nick..

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06 Apr 2021 20:27 #205180 by andypugh
Replied by andypugh on topic G17 G18
This is caused by two things:

1) M2 reverts to G17
2) The status display shows the interpreter state, and that has typically interpreted the whole G-code file and queued all the moves with a few milliseconds of pressing "start"

If you put an M66 E0 L0 command before the M2 you will probably see slightly different behaviour (M66 stops the interpreter lookahead)

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25 Apr 2021 14:45 #207012 by rider-83
Replied by rider-83 on topic G17 G18
I have exchanged M2 with M30, and I still get the same.
Since I upgraded from 2.7 to 2.8 I cannot get any feed motion with spindle movement.
Only G0 rapids currently work.
I think this G17 issue is holding the feed .

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25 Apr 2021 15:03 #207017 by andypugh
Replied by andypugh on topic G17 G18

rider-83 wrote: I have exchanged M2 with M30, and I still get the same.


M30 does all the same resetting as M2. If you don't want it, then put a % at the top and bottom of the G-code file and remove both M2 and M30.

Since I upgraded from 2.7 to 2.8 I cannot get any feed motion with spindle movement.
Only G0 rapids currently work.
I think this G17 issue is holding the feed .


This sounds like spindle-at-speed is being held false in the HAL file.

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