Problems with z-height and layer display.

yOOrek

I am running repeater server 0.65.0 on Raspberry Pi2. Generally the software works great. I have noticed however some problems with layers and z-height display in both normal and LCD touch screen versions. In the print tab on LCD touch screen, when printing something, current layer information is displayed as either 0/0 or sometimes, if I get lucky, the current layer being printed out of zero layers (45/0). The Z-Position is also erratic. Sometimes it works as it should, sometimes it displays 200.00mm.

In the display accessible through web browser on the print tab when viewing uploaded g-codes in list mode the column Layer always shows 0 for all the files. Same in the popup window when I click on the info icon (little i). What is funny however, when clicking on the eye icon, the G-code preview section shows number of layers correctly. When going to the control tab while printing something the Z-position is also not working. X and Y positions are being shown correctly. Print job section in the control tab also displays incorrect information.

Is this a bug or some misconfiguration in my installation?

Regards,

yOOrek

Repetier

I also get it sometimes. But I get it so seldom that is hard to find the reason. We are still hunting the problem. Fortunately is has no side effect on the print.

yOOrek

What about the number of layers in the detailed list view of uploaded files? I've never seen a figure there.

Repetier

That might be a good hint. I see them, but I also have normally layers while printing. So the question is more how to make it happen that it stays zero. Do you have a simple test file that shows 0 layers for you? Would be interesting if I get for that layers or not. I think it could depend on printer start script. Had the same with preview where a extrusion in air confused the renderer assuming wrong layer height.

yOOrek

Here is a link to a code that I upload to server - https://www.dropbox.com/s/r413uwfzawdhw5p/cube-40mm-DD-PLA-WHI-C-L0.10-P1-B3-T0-I0-NS.gcode?dl=0

All my code files are generated by Slic3r 1.2.9 running on OS X. Furthermore the standard code that is included by Slic3r is -

Start G-CODE -

;

; first_layer_height = [first_layer_height]

; layer height = [layer_height]

; perimeters = [perimeters]

; fill_density = [fill_density]

; fill_pattern = [fill_pattern]

; first_layer_bed_temperature = [first_layer_bed_temperature]

; bed_temperature = [bed_temperature]

; disable_fan_first_layers = [disable_fan_first_layers]

;

; Autolevel

;

G28 ; Home all axis

G4 P1000 ; Wait one second

M340 P0 S1500 ; pozycja pionowa czujnika autolevelingu

G32 ; Perform autolevel

M340 P0 S505 ; pozycja pozioma czujnika autolevelingu

G28 X0 ; Home X

M340 P0 S0 ; Turn off autolevel sensor

G28 Y0 ; Home Y

G92 E0 ; Reset extruder position to 0

G1 Z0.12 ; wartosc z kalibracji osi Z

G92 Z0 ; Reset Z axis to 0

;

; Ready to print

;

END G-CODE -

;

; End G-code

;

M104 S0 ; turn off temperature

M140 S0        ; Set bed temperature to 0

G28 X0  ; home X axis

G28 Z0 ; home Z axis

G1 Y170 ; move table forward

M84     ; disable motors

M42 P9 S0

BEFORE LAYER CHANGE -

;

; Start of layer [layer_num]

;

Repetier server event dependent g-code is defined only for 'Run if job is aborted'.

Hope you can access the link without any problems.

yOOrek

Actually your response made me think. I uploaded several versions of my file to the server (no extra g-code, only start g-code and so on) and found out that it is my end code that causes the layer calculation logic to fail. Which part of the code would it be?

;

; End G-code

;

M104 S0  ; turn off temperature

M140 S0         ; Set bed temperature to 0

G28 X0   ; home X axis

G28 Z0 ; home Z axis

G1 Y170 ; move table forward

M84      ; disable motors

M42 P9 S0

yOOrek

OK, got it!

Had to change my end g-code to -

;
; End G-code
;
M104 S0       ; turn off temperature
M140 S0       ; Set bed temperature to 0
G28 X0          ; home X axis
G1 Y170       ; move table forward
M84               ; disable motors

M42 P9 S0

Then when the file is uploaded to the server the correct number of layers is displayed. Somehow my original code was tripping up the logic.

Repetier

Ah I see. Bad logic. Homing Z is the sign I used to reset layer counter I think. You can replace that with

G1 Z<maxZ>

until I find a fix for it. I guess I should only reset for the first z homing in a file:-)

Repetier

It was the G28 Z0 and I have fixed it for next release. Thanks for the help.

yOOrek

Thanks again. When could we expect the next release of RS?

Kind regards,

yOOrek

Repetier

I'm working now hard on the next release. Just want to push a few more improvements into the release before I start with new complicated additions taking time. I think this month we will release 0.70.