How thin can vertical walls be?

I'm trying to print a copy of a cover for a super 8 film spool. The model is basically a hollow cylinder with a filled bottom layer with a small hole in the center. I originally made the model with all walls 1mm thick. The bottom layer printed fine, I think it came out to three printed layers, but the vertical walls were basically ignored. Once it finished printing the bottom layer, the extruder went over to home and proceeded to just raise one layer every few seconds without printing anything.

I'm using reprap-host to generate my gcode. How thick do I have to make a vertical wall before it will recognize them as existing?

My guess is your gcode is dodgy.

1mm thick walls is 2 strands next to each other - this should not cause a problem.

I have not printed such thin objects, but given one of the calibration objects is a hollow, single walled box (walls 0.5mm) 1mm is valid.

Let's see your gcode...

I am able to print 0.5mm wide walls easily, I am using SkeinForge though. Not sure how the RepRap host handles very thin walls, but they shouldn't cause an issue.

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Here's the original openscad file I made, the stl it exported, and the gcode reprap-host generated.

Your gcode is duff

a snippet here....

;#!LAYER: 7/46
G4 P19 ;delay
M107 ;cooler off
G4 P20 ;delay
G1 F5.0; feed for start of next move
G1 Z1.85 F30.4 ;z move
G1 Z2.0 F5.0 ;z move
M106 ;cooler on
G28 X0 ;set x 0
G28 Y0 ;set y 0
;#!LAYER: 8/46
G4 P17 ;delay
M107 ;cooler off
G4 P20 ;delay
G1 F5.0; feed for start of next move
G1 Z2.15 F30.4 ;z move
G1 Z2.3 F5.0 ;z move
M106 ;cooler on
G28 X0 ;set x 0
G28 Y0 ;set y 0
;#!LAYER: 9/46
G4 P19 ;delay
M107 ;cooler off
G4 P20 ;delay
G1 F5.0; feed for start of next move
G1 Z2.45 F30.4 ;z move
G1 Z2.6 F5.0 ;z move
M106 ;cooler on
G28 X0 ;set x 0
G28 Y0 ;set y 0
;#!LAYER: 10/46
G4 P29 ;delay
M107 ;cooler off

What did you use to generate the gcode?

Reprap host, with the STL provided.

Quote
AgeingHippy
What did you use to generate the gcode?

RTFM

Quote
jsadusk
... and the gcode reprap-host generated

Also the comment lines in the form ";#!LAYER: M/N" kind of give it away,

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Bob Morrison
Wörth am Rhein, Germany
"Luke, use the source!"
BLOG - PHOTOS - Thingiverse

rhmorrison Wrote:
-------------------------------------------------------
> > What did you use to generate the gcode?
>
>
> RTFM
>

I guess I deserved that - I am tired...

Anyway, your stl seems fine - Skeinforge created a gcode file which looks fine.

Must be something to do with your Host's settings.

Actually the first layer had both a raft and the first layer of the cube which looks kind of funny.

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Bob Morrison
Wörth am Rhein, Germany
"Luke, use the source!"
BLOG - PHOTOS - Thingiverse

I'm not sure what could be wrong with my reprap-host settings. I'm mostly using the defaults for the stable version with just the feed rate and temperature changed. Its possible that this is triggering a bug in reprap-host. I can open it up in a debugger and see if I can track down where this is happening.

I'm trying to convert to using skeinforge for generating gcode because of the above, but I'm having problems finding a profile that seems to work. Reprap-host at least had sane defaults for a mendel. Does anyone have a working skeinforge profile for mendel, preferably using PLA?