Hi,
i try to make a little tool probing sequence which should work like the
homing sequence for one axis.
The z-axis should go down fast until the probe switch is touched and the
output is closed. After that it should go slowly up until the switch is
opened. For that purpose i took a look into the example file
tool-length-probe.ngc. This file works correctly except that it only
does the probing until the switch is closed (with G38.2).
So i thought i extend the sequence a bit with an additional G38.4
directly after the G38.2 to reach my goal.
Now my problem is that the G38.4 command does not work. I only get the
error message "probe is already clear when starting g38.4 or g38.5 move"
when i try to execute this command. I tried the whole sequence in mdi
mode by manually typing the commands.
working sequence:
g30 (move to probe switch reference position)
g91 (relative koordinates)
g38.2 z-20 f100 (fast probe until switch is closed)
g0 z5 (move 5mm above the switch)
#1000=#5063 (save reference tool length)
g90 (absolute koordinates)
not working sequence:
g30 (move to probe switch reference position)
g91 (relative koordinates)
g38.2 z-20 f100 (fast probe until switch is closed)
g38.4 z20 f10 (slow probe until switch is closed)
g0 z5 (move 5mm above the switch)
#1000=#5063 (save reference tool length)
g90 (absolute koordinates)
It doesn't matter if the switch still is closed or if i open it manually
before executing G38.4. The error still is the same. But instead i can
execute the G38.2 command as often as i want without any errors and it
always works as expected.
When searching for this error message i can only find the reference in
the command.c file within the emc sourcode. So i think i must do
something wrong without knowing it.
I hope someone can shed a bit light in this problem and give me a hint
where the culprit hides. :)
Ciao,
Rainer
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