BLTouch not working

hsverre

@hsverre said in BLTouch not working:

connected the bltouch directly on the bord. But, with the same result.

Have you tried connecting this BLtouch to one of your other printers? Perhaps the BLTouch itself isn't working.

I have don that some days ago. I will try again just to make shure thats not the problem.

hsverre

@phaedrux Could it be an option to reflash the os from scratch?

Phaedrux

@hsverre said in BLTouch not working:

@phaedrux Could it be an option to reflash the os from scratch?

I don't think it's going to make a difference.

The easy way to test the BLtouch is to connect 5v and ground and see if it lights up and tests the pin.

hsverre

@phaedrux said in BLTouch not working:

The easy way to test the BLtouch is to connect 5v and ground and see if it lights up and tests the pin.

Thats the black and white wire?

Phaedrux

No. On a genuine BLTouch 5v is red and ground is black/brown.

hsverre

@phaedrux

Are you refering to the brown on the PWM or the black on the Probe?

hsverre

@phaedrux

The red and black/blue show 0 Volt

DIY-O-Sphere

@hsverre
Doesn't matter but disconnect the probe from the board.....

hsverre

@diy-o-sphere

I did that and the red and brown pin show 0 volt

DIY-O-Sphere

@hsverre
You can connect the probe directly to 5v as @Phaedrux mentioned.

hsverre

@diy-o-sphere

No one of the PWM ports gives 5 V, all of them show 0 V.

And both the BLTOuches works fine on another printer. So they are ok.

There has to be something wrong with the power on the PWM pins

DIY-O-Sphere

@hsverre
There is a jumper on the duex for the use of an external 5v supply.
Have you checked that?

hsverre

@diy-o-sphere
I have played a bit back and forth with that pin. When in the position the schem show the PWM pins gives 2.658 V

DIY-O-Sphere

@hsverre
Set the jumper that way.

hsverre

@diy-o-sphere

BTW Do I need an external powersupply for the Duex other than the 12 V?

DIY-O-Sphere

@hsverre
Only with big 5v fans....

Edit:
To be exact larger consumers like LEDs, rc servos...... in total more than 1A on the 5v line.

hsverre

@diy-o-sphere said in BLTouch not working:

@hsverre
Only with big 5v fans....

I dont have any 5 V fan

hsverre

@diy-o-sphere said in BLTouch not working:

@hsverre
Set the jumper that way.

Now i have set the jumper that way and 2.6 V (half of 5?) at thw PWM

DIY-O-Sphere

@hsverre
You cannot measure this exactly with a voltmeter. But it could be plausible for an end position. It's been a few years since I've measured that too.....I would give it a try.

hsverre

@diy-o-sphere said in BLTouch not working:

You cannot measure this exactly with a voltmeter. But it could be plausible for an end position. It's been a few years since I've measured that too.....I would give it a try.

The BLTouch still dont work with the 2.6 v. In my opinion the problem is that the PWM gives 2.6 V and not 5 V. The schematics says 5 V and then I should measure 5 V at that pin.