Marlin: BL touch not working

[Telekmac]

I was just using my bl touch and I have had the configuration set and have e=been printing successfully with it for months. But just recently the probe stopped deploying all together. The self test fails and anything that requires deploying it fails. If i open it myself and do the reset command it will retract but not deploy. No firmware changes have been made besides readjusting the z offset.

[psavva]

Hi Telekmac,

So you're saying you had no firmware changes.
Your probe is failing to deploy. Sounds like a BLTouch hardware issue.

Start by checking all the wiring and also check the PIN. Why did you need to adjust the z-offset after months of successful printing... Maybe the pin is loose/dropped...

[boelle]

what @psavva said ^^^

[mr-miky]

It could also be a PWM problem on the control pin

[boelle]

could a to cheap board or controller board with badly picked parts be part of the problem? or maybe a noisy psu?

[einencool]

I had the problem, with a cheaper 3D Touch that the wire to the solenoid was broken. It was broken under the original tape at the top of the device...

It sounds a little bit similar..

[Telekmac]

I will be checking the wires for contunity tomorrow. I had to adjust the
offset fue to installing a glass bed. I dont think it is a board issue but
i will check.

On Fri, Feb 22, 2019, 9:52 PM Panayiotis Savva [e-mail]
wrote:

Hi Telekmac,

So you're saying you had no firmware changes.
Your probe is failing to deploy. Sounds like a BLTouch hardware issue.

Start by checking all the wiring and also check the PIN. Why did you need
to adjust the z-offset after months of successful printing... Maybe the is
loose/dropped...

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