BLTouch P9 mode retracts the probe to late ?

Scachi

I am using a BLTouch. This z-probe is mounted onto my main X-carriage. The offset between the z-probe and the two nozzles (left and right of the z-probe, magnetic pickup system) is more (negative) than the offset normally used by the BLTouch 8.3mm (not the trigger height), I use -6.0 here as trigger height:

M558 P9 H8 F100 T1000; Set Z Probe to type bltouch
G31 P25 X0 Y0 Z-6.00 ; Set Z probe trigger value, offset and trigger height - bltouch

I put the hotends in parking position (left & right of the bed) when z-probing to be able to probe the bed without crashing the nozzles into it.

When running the "Run Mesh Grid Compensation" it does this at the moment:

Move to first x/y probe point and z height (z=8)
Deploys probe
Moves downward until probe triggers (probe stays automatically retracted by the bltouch for around 1sec.
Moves upward while the probe stays in retracted state for the 1sec mentioned above
During upward move the probe gets deployed again (1sec is reached)
Probe reaches z=8 again
Probe gets retracted again
Now it continues the procedure by moving to the next x/y position to probe

What I expected it to do:

all the steps above but: retract the probe right after the probe got triggered (automatically retracted by the bltouch on probe contact)
beeing able to define the z probe z-starting position independently of the dive height, no need to raise it to z=8mm all the time, but I need it to travel down that far to be triggered.

I know I should be able to fix this by printing a new BLTouch holder so it is at its z offset from the nozzle to the bltouch casing where it should be: 8,3mm and defining the nozzles z-offset (tool definitions) from this z-point.
But this isn't fixing the retract timing issue, the retraction command is currently run after moving back to the z-height, where it should be run directly after the probe was triggered.

My current tool definitions:
G10 P0 X-35.9 Y9.80 Z-1.3 ; Set tool 0 axis offsets - e3d
G10 P1 X37.0 Y9.00 Z0 ; Set tool 1 axis offsets - e3d clone

I am running Firmware 2.0RC6

////....edit...
Okay, mounting the BLTouch to the position where it should be and you won't notice the retraction problem as the z position is reached before the bltouchs internal 1sec redeploy timer.
New config:
M558 P9 H2 F100 T1000; Set Z Probe to type bltouch
G31 P25 X0 Y0 Z1.00 ; Set Z probe trigger value, offset and trigger height - bltouch - bowden
G10 P0 X-35.9 Y9.80 Z-2.35 ; Set tool 0 axis offsets - e3d
G10 P1 X37.0 Y9.00 Z-1.25 ; Set tool 1 axis offsets - e3d clone

Sorry for the long post

dc42

I am fairly sure that retractprobe.g is run as soon as the trigger is registered; but I'll check tomorrow.

I am aware that the bltouch deploys and retracts twice instead of once per probe point. On the work list for firmware 2.01 is an extra parameter to the M280 command, which I hope will resolve this issue.

dc42

I have confirmed that the code starts running the retractprobe.g file as soon as the probe has been triggered, concurrently with starting the move to raise the probe. But I am also aware that several users have observed the probe re-deploying and re-retracting. Investigating this is on the work list for firmware 2.01. I already have a theory about why this is happening.

Scachi

Thank you for investigating this.
I don't use the bltouch anymore so I can't give a fast feedback if you have found a fix.
I can mount the bltouch again for testing it, but that may take a few days then.