Geeetech aluminum BLtouch problem!!

[coco80]

Hi, i have a geeetech aluminum version with a motherboard arduino mega + ramps 1.4 + DRV8825 + BLtouch.
My problem is on Z axis, infact, after the autoleveling, my 3d printer compensates in the wrong direction, infact if the bed is more down (respect the "0 point", so the center of the bed) on left and more high on right, for example, my 3d printer when is printing on left go more high than the 0 and when is printing on right go down respect the 0....so i have on left an thick print and on right i risk to touch the bed, infact the extruder take a rumors like "tik tik tik", and filament is extruding with more difficult...
Some time, infact, the extrude clogs up.

help me please

[William]

Hi, Did you calibrate it after installing 3d touch?
Specifically you can refer to this: http://www.geeetech.com/wiki/index.php/ ... ing_Sensor
If the nozzle is easily clogged, you can check if the nozzle is fully installed after cleaning.

[Adriano]

You have to set the Z offset...
Anyway, what version of the BLTouch you use AND what version of Marlin ?
If you use the latest version of BLTouch (smart V3) the only way to let the sensor working properly is to install Marlin 2.x OR a deep tweak on Marlin 1.9 Bugfix IS necessary. Without the necessary corrections the sensor "works" but the corrections aren't right . Problem seems solved on Marlin 2.x .
Also, the coordinate between the probe and the nozzle , usually, is set to -37 wich is OK if you use the 3DTouch...but you say BLTouch so the value is -40 .

There's always a "chaos" considering the 3DTouch and BLTouch V3 the same sensor. They are NOT the same and on the BLTouch V3 you have to set some functions . Here's a link :

https://github.com/InsanityAutomation/M ... fa77682715

[coco80]

now i use the firmware:
1.1.x "bugfix" snapshot
Patches after 1.1.9
Supports Arduino 1.6.8 and up

my autoleveling sensor is this: http://www.geeetech.com/wiki/index.php/ ... ing_Sensor

so, the last one http://marlinfw.org/meta/download/
to test the autoleveling, i put a cube 5x5x5mm on one misur point, after the G29, i have been start a "fake" print to see the effect of the autoleveling, infact when the 3d printed go to print near this point, the z axes go up...so, now it function...but not so fantastic!
infact, if i make an autoleveling, on a clear plane, and after i send the extruder on some radnomatic (x and y) points of the plane, with the coordinate z=0, on some points i can put a sheet paper under the extruder (without problem), under other one...nothing, the extruder touch on plane!
now, to evitate this problem i change the probe z offset...but i have some points too up respect the plane.
PS: i notate the extruder go too down on left side of the plane, so for x coordinates near the min endstop.

thanks to all

[Adriano]

You have the 3D Touch , not the BL Touch. This is the first point that must be cleared : they are NOT the same AND the BL Touch V3 need to add some code on Marlin to work properly.
You have points where you can put a paper and others where the nozzle touch the bed ? Then your sensor isn't working right.

Design a square, say 100x100 millimeters, just one layer (0.2mm) and print after a G29 (levelling mesh) . Check HOW it prints, if it's a good print and watch the Z motor coupler if it move back and forth . If it does the prtinted square MUST be nice and smooth. If it does but the printed square is bad...the sensor isn't working .

These are the modifications you need on Marlin 1.9 IF you have the BL Touch (smart ) V3 :
https://github.com/InsanityAutomation/M ... fa77682715

My BLTouch V3 is perfectly working after these mods on Marlin. Of course you can't use the same because the 3DTouch isn't the same, sorry .

[coco80]

thanks for your reply...there is a test to check the quality of my sensor? I want to be sure that the product is not broken.
thanks