3D Touch Sensor:Auto-levelling for Geeetech 3D printer

[bang]

Hi ,

I read all the thread but did not fine any answer to my problem.

When i start the Printer, the 3Dtouch only make 2 movements , not 3.
and i m unable to make it up/down/ selftest with G commands.

nothing happens (just the 2 movements at the start of the printer.)

Do anyone have an idea?

Check your firmware and wiring,maybe you can post more details about your 3D touch(the firmware and the wiring)?

[daveapplemotors]

Two movements==normal. Mine only moves twice on start up.

Do you use any commands like in this other thread on this page: https://www.geeetech.com/forum/viewtopi ... 1&start=20

[sevensad]

Hi,

Thanks for your reply.
I checked the wiring. To be sure, i soldered each wire and verified the continuity with a multimeter. this point is OK.

the firmware is the one of this topic. first page: Marlin-PI3_Pro_B_3DTouch.zip

i tried the G command. Nothing happens. The red light is always on.

[daveapplemotors]

M commands make the 3D touch work.

[sevensad]

Sorry, i mean M command and not G : M280 P0 S10 etc..
no movements.

Any idea? is it possible to check the sensor another way. or check that the board is ok?

[UndCon]

If the sensor is connected correctly and you get no response from sending self test command(or any) it is likely not properly activated in firmware.

[daveapplemotors]

Try lowering the pin--turn screw clockwise--until the light goes off. Raise it (anti-clockwise) a bit and try the commands.

The light should be on until M280 P0 S10 which turns off the light and extends the pin.

[sevensad]

@Undcon: i gonna check again the firmware and all steps (it just will be the 20st time i do it! )
@daveapplemotors: it should light on when lowering? because , in my case, it s light on, when pin is up (in contact) , and off when pin is down.
nevertheless, it tried what you suggested.. nothing.

[daveapplemotors]

It sounds like it might be working just right.
My red LED off when pin is out / extended / down towards bed.
Red LED on when pin is retracted / pulled up into 3D touch sensor.

The pin is out and light off when the nozzle descends toward the middle of the bed - M280 P0 S10 before G28 & G29.

Do you have safe homing enabled?

[sevensad]

Ok, i assume sensor would be ok.

Safe Homing:

I guess yes . in the firmware. configuration.h:

//If you have enabled the Bed Auto Leveling and are using the same Z Probe for Z Homing,
//it is highly recommended you let this Z_SAFE_HOMING enabled!!!

#define Z_SAFE_HOMING

it seems enabled. should not be?