Z drops into bed at start of printing February 05, 2017 07:17PM |
Registered: 9 years ago Posts: 21 |
Re: Z drops into bed at start of printing February 06, 2017 11:19AM |
Registered: 7 years ago Posts: 759 |
Re: Z drops into bed at start of printing February 06, 2017 12:26PM |
Registered: 9 years ago Posts: 21 |
Re: Z drops into bed at start of printing February 06, 2017 12:59PM |
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Re: Z drops into bed at start of printing February 06, 2017 03:28PM |
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Re: Z drops into bed at start of printing February 06, 2017 07:03PM |
Registered: 9 years ago Posts: 21 |
Re: Z drops into bed at start of printing February 06, 2017 07:04PM |
Registered: 9 years ago Posts: 21 |
Quote
obewan
When you home Z to 0. then send a M114 from pronterface, does it say that Z is actually 0.
Re: Z drops into bed at start of printing February 07, 2017 05:49AM |
Registered: 9 years ago Posts: 204 |
Re: Z drops into bed at start of printing February 07, 2017 01:46PM |
Registered: 9 years ago Posts: 21 |
Quote
Shank man
Slic3r used to include a nozzle lift command in the startup g-code
if you see that line after the home axes command get rid of it. All it does
is cause the Z to over ride the limit switch and plunge the nozzle into the bed
[attachment 90110 start_gcode.jpg]
Quote
also check your firmware settings to see if these lines are defined.
#define min_software_endstops true // If true, axis won't move to coordinates less than HOME_POS.
#define max_software_endstops true // If true, axis won't move to coordinates greater than the defined lengths below.
// Travel limits after homing
#define X_MAX_POS 160
#define X_MIN_POS 0
#define Y_MAX_POS 155
#define Y_MIN_POS 0
#define Z_MAX_POS 95
#define Z_MIN_POS 0
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#define X_MAX_LENGTH (X_MAX_POS - X_MIN_POS)
#define Y_MAX_LENGTH (Y_MAX_POS - Y_MIN_POS)
#define Z_MAX_LENGTH (Z_MAX_POS - Z_MIN_POS)
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if your printer is homing correctly than the problem lies in your G-code generated to start the print. Open the g-code
in a text editor and the Z drop command should be in the first few lines. Here is a snippet of some print g-code.
; generated by Slic3r 1.1.7 on 2017-02-05 at 14:34:09
; perimeters extrusion width = 0.25mm
; infill extrusion width = 0.35mm
; solid infill extrusion width = 0.35mm
; top infill extrusion width = 0.35mm
G21 ; set units to millimeters
M106 S0
G28 ; home all axes
G90 ; use absolute coordinates
G92 E0
M82 ; use absolute distances for extrusion
G1 F1800.000 E-1.00000
G1 Z1.150 F7800.000
G92 E0
G1 X30.237 Y30.893 F7800.000
G1 Z0.150 F7800.000 (check to see if Z is a negative number. you can change this. save & reload to host)
G1 E1.00000 F1800.000
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; generated by Slic3r 1.2.9 on 2017-02-02 at 17:14:41
; external perimeters extrusion width = 0.40mm
; perimeters extrusion width = 0.67mm
; infill extrusion width = 0.67mm
; solid infill extrusion width = 0.67mm
; top infill extrusion width = 0.67mm
M107
M190 S100 ; set bed temperature
M104 S235 ; set temperature
G28 ; home all axes
; G1 Z5 F5000 ; lift nozzle
M109 S235 ; wait for temperature to be reached
G21 ; set units to millimeters
G90 ; use absolute coordinates
M82 ; use absolute distances for extrusion
G92 E0
G1 Z0.200 F7800.000
G1 E-5.00000 F2400.00000
G92 E0
G1 Z5.200 F7800.000
G1 X80.181 Y80.854 F7800.000
G1 Z0.200 F7800.000
G1 E5.00000 F2400.00000
G1 X81.923 Y79.437 E5.06669 F1800.000
G1 X85.000 Y78.643 E5.16103
Re: Z drops into bed at start of printing February 07, 2017 04:55PM |
Registered: 7 years ago Posts: 759 |
Re: Z drops into bed at start of printing February 07, 2017 10:31PM |
Registered: 9 years ago Posts: 21 |
Re: Z drops into bed at start of printing February 08, 2017 02:06AM |
Registered: 9 years ago Posts: 288 |
Re: Z drops into bed at start of printing February 08, 2017 10:49AM |
Registered: 7 years ago Posts: 759 |
Quote
// Offsets to the probe relative to the extruder tip (Hotend - Probe)
// X and Y offsets must be integers
#define X_PROBE_OFFSET_FROM_EXTRUDER -25 // Probe on: -left +right
#define Y_PROBE_OFFSET_FROM_EXTRUDER -29 // Probe on: -front +behind
#define Z_PROBE_OFFSET_FROM_EXTRUDER -12.35 // -below (always!)
Re: Z drops into bed at start of printing February 08, 2017 12:45PM |
Registered: 9 years ago Posts: 21 |
Re: Z drops into bed at start of printing February 09, 2017 12:59PM |
Registered: 9 years ago Posts: 21 |
Re: Z drops into bed at start of printing February 09, 2017 03:29PM |
Registered: 7 years ago Posts: 759 |