[BUG] When the printer is powered on, the BLTouch is deployed.

[magnificu]

Description

When the printer is powered on, the BLTouch is deployed.
This can damage the probe if the user moves any axis.
All this happens after commit 2b97218.

This behavior should not be hard coded.

Expected behavior
When the printer is powered on, the probe should not be deployed (stay retracted).

[kisslorand]

Did you check #2452?

[rondlh]

Please provide all information requested by the bug report template.
The TFT doesn't do anything with the BLTouch during startup. What firmware are you using, if it's Marlin, then check your STARTUP_COMMANDS

[kisslorand]

The TFT doesn't do anything with the BLTouch during startup.

Actually it does. It checks the HS mode of BLTouch. (M401 H)

magnificu's version of Marlin doesn't have this capability to report the BLTouch's HS mode, hence it ignores the "H" parameter and executes only "M401" (deploy BLTouch).

[magnificu]

Using the same Marlin version.

BIGTREE_TFT50_V3.0.27.x.bin -> from 10.03.2022 does not deploys the probe.
BIGTREE_TFT50_V3.0.27.x.bin -> from 21.03.2022 deploys the probe.

The problem is that M401 H deploys the probe when the HS mode is disabled in Marlin !!!
(//#define BLTOUCH_HS_MODE true)

Not all the users have/use HS mode.
Again, such a behavior should not be hard coded in the source code.

It is dangerous and can damage precious hardware.

[kisslorand]

@magnificu

The problem is that M401 H deploys the probe when the HS mode is disabled in Marlin !!! (//#define BLTOUCH_HS_MODE true)

Your Marlin is not up to date, latest Marlin doesn't deploy the BLTouch with "M401 H" command.

Again, such a behavior should not be hard coded in the source code.

This behaviour is not coded in the TFT's FW. Your Marlin that is older than the TFT's FW is doing this.

[magnificu]

Ok.
Thanks for the help.
When the TFT firmware requires a minimum Marlin version I guess a warning should be raised or at least a message on the printer display, but maybe as ask too much...

[kisslorand]

It was you who mentioned commit 2b97218 from PR #2393. I guess you missed what is written in that PR so I copy & paste it here for you:

Requirements:

• BTT or MKS TFT
• a BL Touch bed levelling sensor or alike
• Marlin from 12.III.2022 or newer
• "#define BLTOUCH_HS_MODE true" in Marlin's "Configuration_adv.h"

but maybe as ask too much...

Maybe asking users to search and read before complaining is asking too much...
Anyway, you're welcome.

[sarvenn]

@kisslorand hi,
I could not find the option for HS mode on/off you implemented with #2393.
My marlin is up to date and HS mode is true. I expected to see this feature under BL touch menu under ABL where I can stow, deploy, test or reset my BL touch. But it wasn't there. Am I doing something wrong or missing something. I read the explanation but I must be missing something. Would you help?

[kisslorand]

Send "M401 H" to Marlin and check if you got a response or not from Marlin.

[sarvenn]

I will but isn't there a button to switch on/off in TFT mode? I understood like that from your PR.
Should I use the terminal to send Gcode for on and off command?

[kisslorand]

Yes, there's a button, but it is visible(active) only if HS mode is set to true in Marlin. All this only in Marlin from 12.III.2022.
That's why I told you to send "M401 H" to check if your Marlin has the capability to report BLTouch HS mode state.