1 Topic by Robny (edited by Robny 2015-03-04 21:56:06)

  • Robny
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Topic: Cube Feedback

Hello All

Well, after changing the hairspray I used I was able to complete Z Calibration and immediately printed a cube to see what the score was, this is what I got smile

I was quite pleased with the result for a VERY first print, but would like some feedback from some pro's.  I'm ware of the moire and I know what I need to do to get rid of it, however it seems my layers looking from the top are seperated, what causes this? and how do I fix it.  Also there seems to be 'tiny' gaps between the indents of the moire, is this related?

I was quite pleased with the sizing, this is printed using soliprint v1.1.1 with 215 degree hot end and 93 degree bed at 300 micron using default everything else.  The size was measured with calipers at 25mm square +/- 0.5mm.  I was quite please with that or should I be expecting 25mm dead at 0.3?

Thanks for any help

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10994583_10152742887681056_563958449483045019_n.jpg
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10998013_10152742887616056_2387296464433845394_n.jpg
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2 Reply by wardjr

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Re: Cube Feedback

Looking good but a proper calibration cube is a single perimeter.  It is the only way to properly set the extrusion multiplier.  The very first thing to calibrate would be steps per mm for your extruder.  100mm's called for = 100mm's pulled into the extruder.  Then adjust the multiplier till you get a single wall thickness of .48.
Don't wait to adjust the VREF it is easy to do and will have a very positive result.

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3 Reply by Robny (edited by Robny 2015-03-04 14:39:34)

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Re: Cube Feedback

So now I have done a bit of calibration, the extruder, extrudes 100mm when asked for it and my thin wall thickness hovers around .47/.48

I still seem to be having the same problem with the layers not meeting each other in the thickness of the cube.  You can see this looking from the top open end as can be seen in the original pictures (first picture).  Is there an adjustment/calibration for this?  What is my next step to get it dialed in?

I'm using RH/Slic3r
Layer height 0.3
Filament width 1.73
Extrusion multiplier .89
Octave PLA
215 hotend
95 bed

Many thanks for all your assistance, this is one great community!

4 Reply by wardjr

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Re: Cube Feedback

There are a few things you can do and check.
First try a layer height of .2963 instead of .3
Second you will want to check your belts they could be loose causing backlash.
Third make sure the extruder has no wobble in it and adjust it so that it is snug yet still moves freely.
Finally if you haven't already adjust that VREF to eliminate the Moire.  That can seriously mess with a print if it is extreme enough and your prints qualify.

Printit Industries Model 8.10 fully enclosed CoreXY, Chamber heat
3-SD3's & a Workbench all fully enclosed, RH-Slic3r Win7pro, E3D V6, Volcano & Cyclops Hot End
SSR/500W AC Heated Glass Bed, Linear bearings on SS rods. Direct Drive Y-axis, BulldogXL
Thanks to all for your contributions

wardjr's Website

5 Reply by Robny

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Re: Cube Feedback

wardjr wrote:

There are a few things you can do and check.
First try a layer height of .2963 instead of .3
Second you will want to check your belts they could be loose causing backlash.
Third make sure the extruder has no wobble in it and adjust it so that it is snug yet still moves freely.
Finally if you haven't already adjust that VREF to eliminate the Moire.  That can seriously mess with a print if it is extreme enough and your prints qualify.

Thank you

All of these helped significantly

6 Reply by wardjr

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Re: Cube Feedback

Robny wrote:
wardjr wrote:

There are a few things you can do and check.
First try a layer height of .2963 instead of .3
Second you will want to check your belts they could be loose causing backlash.
Third make sure the extruder has no wobble in it and adjust it so that it is snug yet still moves freely.
Finally if you haven't already adjust that VREF to eliminate the Moire.  That can seriously mess with a print if it is extreme enough and your prints qualify.

Thank you

All of these helped significantly

You are welcome these things just take time to really dial in.

Printit Industries Model 8.10 fully enclosed CoreXY, Chamber heat
3-SD3's & a Workbench all fully enclosed, RH-Slic3r Win7pro, E3D V6, Volcano & Cyclops Hot End
SSR/500W AC Heated Glass Bed, Linear bearings on SS rods. Direct Drive Y-axis, BulldogXL
Thanks to all for your contributions

wardjr's Website

7 Reply by pshcims

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Re: Cube Feedback

Where did you get instructions for how to do this calibration cube?

8 Reply by wardjr

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Re: Cube Feedback

Ummmm are you asking how to print it or slice it?
Or are you asking where the instructions are for a particular cube you downloaded?
Or are you questioning how I know how to do it this way?  Answer would be research, observation and experience.  I didn't write the book on the subject but I did rewrite it wink

Printit Industries Model 8.10 fully enclosed CoreXY, Chamber heat
3-SD3's & a Workbench all fully enclosed, RH-Slic3r Win7pro, E3D V6, Volcano & Cyclops Hot End
SSR/500W AC Heated Glass Bed, Linear bearings on SS rods. Direct Drive Y-axis, BulldogXL
Thanks to all for your contributions

wardjr's Website

9 Reply by wardjr

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Re: Cube Feedback

Kidding aside just draw a cube 20x20x10
Setup a slice profile to print a single perimeter one bottom layer and no top layer.
Set infill to zero
Set extrusion width's to .48 if they are zero leave them
Make sure all other stuff is set properly like filament diameter (actually measure)
Nozzle diameter set to .40
Make sure steps per mm have been calibrated.
Then slice with that profile and print it.
Then measure the single walls of the cube and average them.
Adjust extrusion multiplier until you achieve a true single wall thickness of .48
Any questions?

Printit Industries Model 8.10 fully enclosed CoreXY, Chamber heat
3-SD3's & a Workbench all fully enclosed, RH-Slic3r Win7pro, E3D V6, Volcano & Cyclops Hot End
SSR/500W AC Heated Glass Bed, Linear bearings on SS rods. Direct Drive Y-axis, BulldogXL
Thanks to all for your contributions

wardjr's Website

10 Reply by jagowilson (edited by jagowilson 2015-03-05 05:37:58)

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Re: Cube Feedback

wardjr wrote:

if they are zero leave them

Actually you need to leave it at .48. If you don't, slic3r will print a .4*1.05 = 0.42mm perimeter as 1.05 is its default nozzle diameter multiplier for external perimeters, if left at 0.

11 Reply by pshcims

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Re: Cube Feedback

wardjr wrote:

Kidding aside just draw a cube 20x20x10
Setup a slice profile to print a single perimeter one bottom layer and no top layer.
Set infill to zero
Set extrusion width's to .48 if they are zero leave them
Make sure all other stuff is set properly like filament diameter (actually measure)
Nozzle diameter set to .40
Make sure steps per mm have been calibrated.
Then slice with that profile and print it.
Then measure the single walls of the cube and average them.
Adjust extrusion multiplier until you achieve a true single wall thickness of .48
Any questions?

That's all a bit over my head right now, but I will try to figure out.

12 Reply by Robny

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Re: Cube Feedback

pshcims wrote:
wardjr wrote:

Kidding aside just draw a cube 20x20x10
Setup a slice profile to print a single perimeter one bottom layer and no top layer.
Set infill to zero
Set extrusion width's to .48 if they are zero leave them
Make sure all other stuff is set properly like filament diameter (actually measure)
Nozzle diameter set to .40
Make sure steps per mm have been calibrated.
Then slice with that profile and print it.
Then measure the single walls of the cube and average them.
Adjust extrusion multiplier until you achieve a true single wall thickness of .48
Any questions?

That's all a bit over my head right now, but I will try to figure out.

Please also note that my pictures attached are NOT actually 'proper' calibration cubes as they need to be single wall thickness as wardjr mentions.  I created 25mm square cube with no top or bottom and made sure my wall was .48 thickness, slic3d and printed.

You will get it, I was new to this only a couple of weeks ago, but understanding a lot more now.....however I have been reading the forum since September when I placed more order for the Press though smile  but now I have it I couldn't be happier.