3.2b2 Duet3/RPi with Toolboard - G30 issue with BLTouch

Phaedrux

BLtouch version?

oozeBot

oozeBot

If it would help, I can take some video of it failing in different ways.. like I just rebooted, then honed three times in a row. Once, it didn’t even try to probe at the start point and immediately moved to the left side of the bed. Another time it only probed the center point once, then moved on. The third time, it probed the center point correctly once, moved way too high for the second pass, and failed by it not touching due to the dive height.. weird stuff.

I’m rolling back to 3.2b1, but am willing to roll forward to 3.2b2 if there is anything specific I can help with.

oozeBot

Here is a quick video before I roll back to 3.2b1 on the test machine on my workbench. It shows the G30 Z-99999 being skipped (no probe in center), the tool moves to X20, probes twice (correctly), probe retracts, and then it probes again without the probe extended before moving on to X280..

https://vimeo.com/466360608

Edit- rolled back to 3.2b1 again and it was successful the first try. No changes to any configs..

Phaedrux

Thanks. What is your M558 and G31 being used at the time?

oozeBot

@Phaedrux - here you go..

M558 K0 P9 C"20.io0.in" H6 F200 T12000 A5 R0.1 S0.01
G31 X20 Y20 Z2.60 P25

oozeBot

And if the P25 in my G31 is questioned, here is the homez.g routine working again on 3.2b1. It's done this way as Z is belt driven and it first lifts the gantry to max-Z to remove any skew between left and right. When it comes down, it will always be between 10-15mm above the bed depending on the build plate used.

Oh, and please forgive anything 'off' in the videos - this is a very early prototype that has been torn down more times than I can count..

https://vimeo.com/466370457

gloomyandy

I suspect the problem you are seeing is related to the issue reported here: https://forum.duet3d.com/topic/19074/bed-levelling-traming-odd-message-3-2-beta-2

I think it is a general beta2 issue and not specifically toolboard related (though having a toolboard may impact the timing and cause it to happen more often).

If you get the chance you may want to re-run the test with gcode and SBC debug enabled (using m111 p3 s1 and m111 p16 s1). This may provide a little more information as to what is going on.

oozeBot

I still can't get 3.2b2 to probe, which is pretty much a deal breaker. Has the cause been identified?

I'm stuck in a bad place where I can't view the height map on 3.2b1 (DWC issue resolved in 3.2b2) but can't probe in 3.2b2..

jay_s_uk

@oozeBot dc42 got a bltouch 3.1 in the post today so will be looking at the issues with the toolboard.
In the meantime, you could build the SBC version of DWC from the github wiki. Its fairly easy to build. It can then just be uploaded through the systems tab.
https://github.com/Duet3D/DuetWebControl/tree/v3.2-dev
If you can't get it to build, drop me a pm

oozeBot

@jay_s_uk Thanks! I'll see if I can carve out some time this afternoon to do this.. in the meantime, I've pulled a new Duet3 and RPi out of the box to setup 3.2b2 without a printer attached. I can then upload the height map to view from our 3.2b1 machines.. it ain't pretty, but I just rebuilt one of our machines and have to get it re-leveled somehow.