printer starts printing too high (1-2 mm)
Hello,
I just bought a Prusa I3 aluminum from Geeetech. So I'm a total beginner at 3D printing.
My problem is the following : the very first print layer (skirt) starts 1-2 mm above the bed (nota: I don't use auto-leveling)
The softwares I use :
Repetier- Host : 1.6.2
Slic3r : 1.2.9
I tried to add an offset in the Slicer configuration : the 1, 2, 3third layers are well printed but after it seems the nozzle does not add layers anymore but scratch the existing ones.
I think the problem is from the code after the start gcode as below :
Indeed the following step is not carried out : " G1 Z0.300 F7800.000 ; move to next layer (0) "
------------------------------------------------------------------------------
; generated by Slic3r 1.2.9 on 2017-01-07 at 20:58:18
; external perimeters extrusion width = 0.50mm
; perimeters extrusion width = 0.50mm
; infill extrusion width = 0.50mm
; solid infill extrusion width = 0.50mm
; top infill extrusion width = 0.50mm
; support material extrusion width = 0.50mm
M107 ; disable fan
M190 S55 ; set bed temperature
M104 S220 ; set temperature
G28; Home axis
G1 Z5.0 F5000 ; lift nozzle
M109 S220 ; wait for temperature to be reached
G21 ; set units to millimeters
G90 ; use absolute coordinates
M82 ; use absolute distances for extrusion
G92 E0 ; reset extrusion distance
G1 E-3.00000 F3600.00000 ; retract
G92 E0 ; reset extrusion distance
G1 Z0.300 F7800.000 ; move to next layer (0) ==========> the printer does not go to Z0.3
G1 X84.799 Y85.709 F7800.000 ; move to first skirt point
G1 E3.00000 F3600.00000 ; unretract
G1 X86.556 Y84.204 E3.12572 F1920.000 ; skirt
G1 X88.718 Y83.380 E3.25144 ; skirt
G1 X90.000 Y83.258 E3.32140 ; skirt
G1 X130.000 Y83.258 E5.49471 ; skirt
G1 X132.280 Y83.655 E5.62043 ; skirt
G1 X134.291 Y84.799 E5.74615 F1920.000 ; skirt
--------------------------------------------------------------------------
Any idea why moving to Z0.3 not possible ?
Thanks a lot
Josh
I just bought a Prusa I3 aluminum from Geeetech. So I'm a total beginner at 3D printing.
My problem is the following : the very first print layer (skirt) starts 1-2 mm above the bed (nota: I don't use auto-leveling)
The softwares I use :
Repetier- Host : 1.6.2
Slic3r : 1.2.9
I tried to add an offset in the Slicer configuration : the 1, 2, 3third layers are well printed but after it seems the nozzle does not add layers anymore but scratch the existing ones.
I think the problem is from the code after the start gcode as below :
Indeed the following step is not carried out : " G1 Z0.300 F7800.000 ; move to next layer (0) "
------------------------------------------------------------------------------
; generated by Slic3r 1.2.9 on 2017-01-07 at 20:58:18
; external perimeters extrusion width = 0.50mm
; perimeters extrusion width = 0.50mm
; infill extrusion width = 0.50mm
; solid infill extrusion width = 0.50mm
; top infill extrusion width = 0.50mm
; support material extrusion width = 0.50mm
M107 ; disable fan
M190 S55 ; set bed temperature
M104 S220 ; set temperature
G28; Home axis
G1 Z5.0 F5000 ; lift nozzle
M109 S220 ; wait for temperature to be reached
G21 ; set units to millimeters
G90 ; use absolute coordinates
M82 ; use absolute distances for extrusion
G92 E0 ; reset extrusion distance
G1 E-3.00000 F3600.00000 ; retract
G92 E0 ; reset extrusion distance
G1 Z0.300 F7800.000 ; move to next layer (0) ==========> the printer does not go to Z0.3
G1 X84.799 Y85.709 F7800.000 ; move to first skirt point
G1 E3.00000 F3600.00000 ; unretract
G1 X86.556 Y84.204 E3.12572 F1920.000 ; skirt
G1 X88.718 Y83.380 E3.25144 ; skirt
G1 X90.000 Y83.258 E3.32140 ; skirt
G1 X130.000 Y83.258 E5.49471 ; skirt
G1 X132.280 Y83.655 E5.62043 ; skirt
G1 X134.291 Y84.799 E5.74615 F1920.000 ; skirt
--------------------------------------------------------------------------
Any idea why moving to Z0.3 not possible ?
Thanks a lot
Josh
Comments
Thank you for the quick reply.
I double checked my bed calibration by doing what you mentioned in your previous message.
My initial calibration was actually good.
What I tried after is the following : after slicing my object, I edited my GCODE and replaced the first G1 command as follows "G1 Z0.300 F7800.000" by "G1 Z0.0500 F7800.000". Conclusion : the first layer looked perfect.
So I realized that when I tried to print previously, the program performed well "G1 Z0.300 F7800.000" but somehow Z0.300 was not 0.3mm but 3mm instead.
Indeed, when I edited the GCODE to "G1 Z0.0500 F7800.000", the first layer is perfect. But the following G1 command (= 2nd layer) with Z0.3 is too high from the first layer (3mm or so).
So for whatever reasons, there's a 10x factor difference between the reality and what the program does.
Any idea where it could come from ?
Thank you very much.
Josh
The print was unsuccessful because too high from the bed.
What I did next is to check if my Z motor delivered the right height ?
So I set Z to 0 manually. And from 0, I launched (manually also) the following command :
G1 Z1.25 F100 = 1 full turn
then
G1 Z2.5 F100 = 1 full turn again
etc. up until
G1 Z6.25 F100
Then I measured with a ruler the distance between the bed and the tip of the nozzle. Distance = 4.2-4.3 mm instead of 6.25
Is that normal ? Or maybe I don't measure the distance between the two right points?
FYI here is my eeprom regarding to step per mm:
X : 80.00
Y : 80.00
Z : 2560.00
E : 97.00
Also I use for the Z axis M8*300mm threaded rods.
1/ Any idea why Z0.3 is not 0.3 mm but more something like 3 mm.
2/ Do I have a problem with my motor (regarding to the above measurement : 4.2-4.3 vs 6.25) ?
Thanks a lot
Josh
Logs :
-----------------------------------------------------------------------------------------------------------------------
19:14:23.958 : Slic3r command:C:\Program Files\Repetier-Host\Slic3r\slic3r.exe --load "slic3r_settings.ini" --print-center 110.00,110.00 -o "composition.gcode" "composition.amf"
19:14:24.306 : <Slic3r> => Processing triangulated mesh
19:14:24.314 : <Slic3r> => Generating perimeters
19:14:24.931 : <Slic3r> => Preparing infill
19:14:24.958 : <Slic3r> => Infilling layers
19:14:25.581 : <Slic3r> => Generating support material
19:14:25.680 : N96 M105*24
19:14:26.207 : <Slic3r> => Generating skirt
19:14:26.208 : <Slic3r> => Generating brim
19:14:26.209 : <Slic3r> => Exporting G-code to composition.gcode
19:14:26.638 : <Slic3r> Done. Process took 0 minutes and 2.331 seconds
19:14:26.639 : <Slic3r> Filament required: 1972.4mm (4.7cm3)
19:14:28.739 : N97 M105*25
19:14:31.805 : N98 M105*22
19:14:34.412 : N99 M107*21
19:14:34.413 : N100 M190 S35*95
19:14:34.414 : N101 M104 S217*97
19:14:34.419 : N102 G28*16
19:14:34.420 : N103 G1 Z5 F5000*6
19:14:34.420 : N104 G21*31
19:14:34.420 : N105 M109 S217*104
19:15:59.094 : N106 M117 FIN 37m 35s*94
19:15:59.094 : N107 M105*33
19:15:59.094 : N108 G21*19
19:16:02.852 : N109 M117 FIN 37m 35s*81
19:16:02.852 : N110 M105*39
19:16:02.852 : N111 G90*17
19:18:19.461 : N112 M105*37
19:18:19.461 : N113 M117 FIN 37m 35s*90
19:18:19.462 : N114 M82*29
19:18:19.464 : N115 G92 E0*66
19:18:19.464 : N116 G1 E-2 F4800*62
19:18:19.464 : N117 G92 E0*64
19:18:19.485 : N118 G1 Z0.3 F7800*30
19:18:19.485 : N119 G1 X82.209 Y81.944 F7800*72
19:18:19.485 : N120 G1 E2 F4800*22
19:18:19.485 : Impression couche layer 1 sur 110
19:18:19.485 : N121 G1 X84.615 Y80.172 E2.27411 F1440*6
19:18:19.723 : N122 M117 FIN 37m 34s*89
19:18:19.724 : N123 G1 X87.403 Y79.098 E2.54822*110
19:18:19.835 : N124 G1 X90 Y78.793 E2.78818*124
19:18:19.835 : N125 G1 X130 Y78.793 E6.4582*119
19:18:19.851 : N126 G1 X132.961 Y79.191 E6.73231*92
19:18:19.851 : N127 G1 X135.711 Y80.358 E7.00642 F1440*48
19:18:19.851 : N128 G1 X138.056 Y82.209 E7.28053*90
19:18:19.867 : N129 G1 X139.828 Y84.615 E7.55464*94
19:18:19.867 : N130 G1 X140.902 Y87.403 E7.82875*81
19:18:19.867 : N131 G1 X141.207 Y90 E8.06871*71
19:18:19.883 : N132 G1 X141.207 Y130 E11.73873*71
19:18:19.883 : N133 G1 X140.809 Y132.961 E12.01284*85
19:18:19.884 : N134 G1 X139.642 Y135.711 E12.28695*92
19:18:19.908 : N135 G1 X137.791 Y138.056 E12.56106*81
19:18:19.910 : N136 G1 X135.385 Y139.828 E12.83517*93
19:18:22.105 : N137 M105*34
19:18:23.049 : N138 G1 X132.597 Y140.902 E13.10928*93
19:18:23.225 : N139 G1 X130 Y141.207 E13.34924*78
19:18:23.226 : N140 G1 X90 Y141.207 E17.01926*123
19:18:23.257 : N141 G1 X87.039 Y140.809 E17.29337*109
19:18:23.385 : N142 G1 X84.289 Y139.642 E17.56748*111
19:18:23.496 : N143 G1 X81.944 Y137.791 E17.84159*105
19:18:25.159 : N144 M105*38
19:18:25.159 : N145 M117 FIN 37m 26s*91
-----------------------------------------------------------------------------------------------------------------------
Also, after measuring the pitch, I wanted to change the step / mm in the eeprom to see what would happen. So I set Z step/mm to 4000 instead of 2560.
Then I launch G0 Z10. The motor turned much faster.
- Then I measured the distance between the bed and the tip of the nozzle : 10 cm.
- Remember, with the initial 2560 step/mm, the distance between the nozzle and the bed : 5.2-5.3 cm
- But then with 4000 step/mm set up, I launched G0 Z0.3 which is my initial concern, and the distance between the nozzle and the bed is same than with 2560 step/mm.
Should I use 2560 or 4000 step/mm for Z axis ? knowing that I use the following motor : 200 1.8° 1/16th.
thank you
Josh
I tried to do what you proposed as follows (step/mm Z axis 2560.00) :
1/ M111 S1 to enable echo
2/ G28 Z (I forgot to write 0 but not big deal since it understood Z0)
3/ G28 Z0
4/ G1 Z0.3
here are the logs :
22:48:20.701 : N99 M111 S1*80
22:48:33.613 : N100 G28 Z0*88
22:48:33.615 : echo:N100 G28 Z0*88
22:48:33.993 : N101 M105*39
22:48:37.430 : echo:N101 M105*39
22:48:52.405 : N102 G28 Z0*90
22:48:52.407 : echo:N102 G28 Z0*90
22:48:54.008 : N103 M105*37
22:48:56.193 : echo:N103 M105*37
22:49:02.406 : N104 G1 Z0.3*122
22:49:02.410 : echo:N104 G1 Z0.3*122
Conclusion : to me, the firmware understands Z0.3. Do you confirm ?
ps : I made sure there was no G92 Zxxx before.
@MartinH
I tried to change the step/mm on Z axis to see what's going on.
0/ 2560 => G1 Z150 F1000 is out of range !
So I change 150 to 15. It seems Z axis is in cm not mm. Is it normal ?
1/ 2560 => G28 Z0 then G1 Z15 F1000 => distance from bed to tip of extruder : 9.5 cm
2/ 3200 => G28 Z0 then G1 Z15 F1000 => distance from bed to tip of extruder : 13 cm
3/ 4000 => G28 Z0 then G1 Z15 F1000 => distance from bed to tip of extruder : 15 cm
but then, no matter what step/mm on z axis :
4/ with 2560 => G28 Z0 then G1 Z0.3 F1000 => distance from bed to tip of extruder : 3 mm
5/ with 3200 => G28 Z0 then G1 Z0.3 F1000 => distance from bed to tip of extruder : 3 mm
6/ with 4000 => G28 Z0 then G1 Z0.3 F1000 => distance from bed to tip of extruder : 3 mm
@Roko
Thanks for the tip. That's what I tried above.
------------------------------------------------------------------------------------------------------------------------------------
My conclusion : I feel there's some kind of scale problem on z axis. Because no matter what step/mm is set up in eeprom,
> G28 Z0 then G1 Z0.3 F1000 => distance from bed to tip of extruder : 3 mm
> G28 Z0 then G1 Z0.03 F1000 => distance from bed to tip of extruder : 0.3 mm
But I might be wrong too.
Also, I tried to look for any offset or unit or scale, in Marlin file configuration.h. I re-uploaded the firmware few times, each time with some 1 single change in configuration.h (parameters regarding to z axis) but still the same issue.
Any idea guys ? I really don't know where I should look into now.
Many thanks !
Josh
in 1/16th mode with 1mm pitch rod you should have 3200 steps/ mm
so two possibilities : check if jumpers are set correctly or set steps to 400
@RAyWB @MartinH @Roko @Repetier I wanted to thank you guys for your help !! Much appreciated !
Enjoy your week-end !
Josh
i don´t know about the electronics used in your printer,so may be you have information in manual
or you´ll find somewhere in web.
enjoy printing ;-)
RAyWB
I bought recently the Geeetech prusa i3 PRO W.
I have the same problem at the begining of printig.
I tried to change the parameter in repetier host -->Manual Control-->G-Code:
G28 Z0
G1 Z15 F1000
and works bad.
Thanks,
Should not be a problem - firmware has internally a limit speed for z but i guess it is configured too high in your case. Change it real limit speed in firmware and it should not matter any more.
I don't know how to change the firmware. But in any case, I wonder why the settings allow the limits to be edited but then ignore them - I'm sure this can't be right, otherwise how could you know that any settings anywhere were going to be obeyed?
I think the user start code is in the "scripts" section and these are all empty.
Am I right in thinking that the slicer part of the Repetier Host package is supplied for convenience rather than supported by Repetier? If so maybe I am asking in the wrong forum.
Most firmwares allow changing max speed in eeprom so no compilation is required.