Bl touch don't respond

lormal

I have a problem with bl touch. I have a duet3 mainboard and i attached the bl touch to io7 pin. The wiring should be ok.

Red in 5v
Yellow in OUT
Brown and black in GND (it is correct??)
White in IN

I create the file deployprobe.g and retractprobe.g and change my config.g like that:

M950 S0 C"io7.out"
M558 P9 C"^io7.in" H5 F100 T2000
G31...
M557...

The issue is that when i send for test the probe M280 P0 S10 or s90 the probe doesn't respond. The only thing that change is that with S90 the value is costant to 1000 and with S10 variyng from 0 to 1000 every second.
The bl touch don't move or color or orher things like that, do nothing.

I attend yours reply.
Thank you

Veti

@lormal said in Bl touch don't respond:

The wiring should be ok.

bltouch wiring is notoriously bad.

please connect the bltouch directly without extension cable

the wiring seems ok according to this
https://duet3d.dozuki.com/Wiki/Connecting_a_Z_probe#Section_Duet_Num_3

Phaedrux

What version of BLTouch is it?

Try using IO_4 or IO_5 instead of IO_7.

Ensure your crimps are good and test the bltouch connected directly to the board if possible.

lormal

Bl touch is V3.1. My cable length is about 2.5m. I have used another cable instead of the 1m cable extention. Can it be a problem?
I can try to use io5.

Phaedrux

You can try switching between these two modes on the BLTouch.

https://www.antclabs.com/logic

lormal

I control all the crimps and connession and they are all ok.
I try to change between IO-4 / 5 / 7 and the behaviour is the same.

I have test https://www.antclabs.com/logic and the bltocuh don't respond, in particular it doesn't deploy and it retract only when arrives at some level, but this happens also when the Bl touch is turn off.

I have tested the out voltage of IO_4 / 5 / 7 and all the others and I found 4.88V also without nothing attacched. it can be a problem or not?

lormal

I have connect also the bl touch direct to the board without the length of 2.5m and it is the same.

I have do two connector one for three wire and the others for two wires(black+white), connect to IO_7 and IO_5 , changing the config.g but it is the same.

The bl touch is never moved or become red.

Veti

does it do self test when you turn it on?

lormal

No it doesn't do the self test. It doesn't become red or any other things.

Veti

do you have another printer where you could test it, because it sounds broken like its not getting power.

Phaedrux

If you supply it with 5v and ground it should at least power on and self test. If it's not even doing that it's likely a problem with the bltouch.

lormal

I have test the bltouch with 5V and it doesn t move so i think that the bl touch is broke.