Probe Already Triggered at Start of Probing Move Error

DrJawa

The pin of my BL Touch was bent which I was able to straighten but ever since when I try to do a new height map I receive the error "probe already triggered at start of probing move." I've made sure to home the x, y and z axis and I've been able to successfully run the deploy and retract commands. I've also rebooted as well. Any ideas why this error keeps occurring and do I just need to replace the pin even though it was straightened out and freely deploys and retracts?

Phaedrux

I would say replace the pin. It sounds like it's not able to position itself correctly anymore.

DrJawa

@Phaedrux Replaced the probe and got the same error. I made sure to make sure the probe deployed and retracted first which it did fine. When I go to run the height map it moves to the middle of the bed and deploys and retracts fine. It then moves to the front corner, probe deploys and that's when the error appears and it stops.

Phaedrux

Post your config.g and homing files and the probe retract deploy files.
Also post the results of M122 and M98 P"config.g"

GeoffVR6

I've had some issues with this on one of my printers. Make sure the pin is straight like Phaedrux said. Also, sometimes very fine strings of filament can get into where the pin slides and make it stick. If you pull the pin in and out, you shouldn't feel any restriction. On my problem printer I also added a M558 R delay to the probe and that seemed to help a bit.

M558 P9 C"^zprobe.in" H5 F120 T6000 R1 B0

With R1 I have a 1 second delay.
Of course, this isn't official advice, just some things I have tried.

paralepsis

@Phaedrux Hi, this printer was originally mine, and we debugged it.

The issue turned out to be that the crash had left the front-left corner of the plate much higher than the center of the bed (three Z steppers on a D-Bot, front left and right on same controller, not tied together with a single belt (obviously)). The macro would probe center of bed first to establish a "zero", then build the height map. Because the plate was so askew, on deploy the probe would hit the plate immediately in that front left corner, causing the fail.

While the root issue was the corner being too high, the fail could be avoided by moving to Z=10 after the first probe, leaving room for the probe to deploy. So that was added to the macro.