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3dTouch auto leveller
Posted: Tue Jan 30, 2018 2:45 pm
by geoff
It a Geeetech I3 Pro B gt2560 rev A+ Every thing works except calibrating it when you get to The LCD display should show Z = 0
From the display go to the Menu then Prepare/Move axis/0.1mm/Move Z
Now move the Z axis slowly down until the nozzle is the right distance from the build plate (folded piece of paper or thin card).
I can not move it down by the display or by the repeater does any know what i'm doing wrong
Thanks Geoff
Re: 3dTouch auto leveller
Posted: Sun Mar 18, 2018 6:19 am
by JohnDeere630
geoff, did you get this sorted? There is a setting in config.h that allows negative z movements, but where it is depends on the firmware version. On Marlin 1.1.8, it is this, in the z-probe section, starting at line 803:
// Min software endstops curtail movement below minimum coordinate bounds
#define MIN_SOFTWARE_ENDSTOPS
#if ENABLED(MIN_SOFTWARE_ENDSTOPS)
#define MIN_SOFTWARE_ENDSTOP_X
#define MIN_SOFTWARE_ENDSTOP_Y
//#define MIN_SOFTWARE_ENDSTOP_Z
#endif
Note that the #define MIN_SOFTWARE_ENDSTOP_Z is commented out.
Re: 3dTouch auto leveller
Posted: Mon Mar 19, 2018 7:53 pm
by William
JohnDeere630 wrote: ↑Sun Mar 18, 2018 6:19 am
geoff, did you get this sorted? There is a setting in config.h that allows negative z movements, but where it is depends on the firmware version. On Marlin 1.1.8, it is this, in the z-probe section, starting at line 803:
// Min software endstops curtail movement below minimum coordinate bounds
#define MIN_SOFTWARE_ENDSTOPS
#if ENABLED(MIN_SOFTWARE_ENDSTOPS)
#define MIN_SOFTWARE_ENDSTOP_X
#define MIN_SOFTWARE_ENDSTOP_Y
//#define MIN_SOFTWARE_ENDSTOP_Z
#endif
Note that the #define MIN_SOFTWARE_ENDSTOP_Z is commented out.
You are correct
Re: 3dTouch auto leveller
Posted: Wed Mar 21, 2018 2:57 am
by GJRTimmer
Also; when you connect with USB, and for example Repetier-Host, you can simple send the Following commands:
"M211 S0" => Disable Software endstops
Do your calibration, after sending M211 S0, you will be able to select Move Z-Axis => 0.1mm and move negative.
"M211 S1" => Enable Software endstops.
Benefits are that the firmware software endstop is enforced on printer restart.
So you only need it for calibration.