1 Topic by slimstar2

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Topic: Why a difference in # of layers.....

I have noticed that if I use Slic3r on a part it says 284 layers at .2 mm and 3 + hrs
                               if I use Cura it says 212 layers for the same part at .2 mm and 1 + hrs

why would there be a difference in # of layers if they are both the same part and layer thickness ?

SD3, RAMPS 1.4, Lawsy's carriages modified by me, 2 SSRs, E3D V6, 2 Power supplies, Independent monitoring of both power supplies (amps and volts) also extruder and bed temps, Blue Tooth connectivity, bearings in all axis & rotational points, Y axis direct drive.  Remotely controlled power box on / off . Gecko Tec build plate . Renamed FrankenDoodle

2 Reply by wardjr

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Re: Why a difference in # of layers.....

I would bet the answer lies in the math and actual distance traveled by the Z-axis vs. the stated layer thickness of the profile.  For example many of us use something that calculates out more accurately and in multiples of the thread pitch of the z-rod.  I use for (.3) .2965 (I think that's right) not in front of my PC.  But you get the idea of how that could change number of layers from one slicer to the other.

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3 Reply by n2ri

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Re: Why a difference in # of layers.....

so the other slicer may be based on a dif printer then? with dif steps or threads on Z?

Solidoodle 2 with Deluxe kit cover & glass bed with heater. and 2nd board SD2 used not 3rd and alum platform not installed yet still wood. also need cooling fan installed to board. use Repetier Host couple vers. Slic3r also have all free ware STL programs

4 Reply by slimstar2

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Re: Why a difference in # of layers.....

Thanx   Wardjr That makes sense, I will check my settings .

SD3, RAMPS 1.4, Lawsy's carriages modified by me, 2 SSRs, E3D V6, 2 Power supplies, Independent monitoring of both power supplies (amps and volts) also extruder and bed temps, Blue Tooth connectivity, bearings in all axis & rotational points, Y axis direct drive.  Remotely controlled power box on / off . Gecko Tec build plate . Renamed FrankenDoodle

5 Reply by Tomek (edited by Tomek 2014-09-02 13:23:52)

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Re: Why a difference in # of layers.....

wardjr wrote:

I would bet the answer lies in the math and actual distance traveled by the Z-axis vs. the stated layer thickness of the profile.  For example many of us use something that calculates out more accurately and in multiples of the thread pitch of the z-rod.  I use for (.3) .2965 (I think that's right) not in front of my PC.  But you get the idea of how that could change number of layers from one slicer to the other.

No, i don't see how this would be the answer for varying from 212 layers to 284 layers. It could vary the layer number by a few percentage, max.   The variance between .2965 and .3 is only 1-2%. but let me know if I'm missing something.


212 to 284 layers does not make sense. Perhaps cura and repetier are set differently.

To OP:
Do the prints come out looking similarly? And is your filament diameter and extrusion multiplier the same between programs?