Machine Shop

Makergear M2: Deprime Test Object

This object from whpthomas’s collection exercises the deprime operation in Sailfish, but it seemed like it’d be useful to verify the Marlin settings in the M2:

M2 - whpthomas deprime test
M2 – whpthomas deprime test

From the other side:

M2 - whpthomas deprime test - view 2
M2 – whpthomas deprime test – view 2

Yes, that was rather anticlimactic. No ooze, no stringing, no surface finish blemishes, just the finished object on the build platform’s glass sheet.

I like that!

The slight bumps on the sharp corner edges seem to be due to the crazy-high perimeter and infill speeds I’ve been playing with, although (I think) those are also where layer changes occurred. The first layer height came out a bit short, so there’s a small flange around the object’s bottom edge; I was figuring out how to get a precise level across the entire surface and stabilize the Z-min switch operation.

The slic3r configuration:

; generated by Slic3r 0.9.8 on 2013-03-29 at 20:51:15

; layer_height = 0.25
; perimeters = 1
; top_solid_layers = 3
; bottom_solid_layers = 3
; fill_density = 0.10
; perimeter_speed = 100
; infill_speed = 300
; travel_speed = 500
; scale = 1
; nozzle_diameter = 0.35
; filament_diameter = 1.70
; extrusion_multiplier = 0.9
; perimeters extrusion width = 0.40mm
; infill extrusion width = 0.40mm
; first layer extrusion width = 0.39mm

No source code, as it’s directly from the STL on Thingiverse; I have no idea which modeling program he used.

2 thoughts on “Makergear M2: Deprime Test Object”

  1. Thanks for the post.

    What speed and distance are you using for deprime?

    Can you push a video of printing at the “crazy-high perimeter and infill speeds” ?

    Thanks.

    1. It’s 1 mm at anywhere from 80 to 300 mm/s with 10 m/s^2 acceleration . I confess to not having any notes for these objects, for reasons that should clear up soon, but those are about right.

      I recently moved the whole lashup to the Basement Laboratory, where I plan to set up some decent lighting for photography; I tried taking a few videos on my desk with terrible results.

      Visually, however, a 500 mm/s non-printing move with 9 m/s^2 acceleration looks like quantum tunneling in action: the nozzle is here and then it’s there, without being spotted anywhere in between. Infill at 300 mm/s means the XY axes reach that speed in 5 mm. Looked at a little differently, the XY axes now accelerate at a bit under 1 G.

      The motivation for trying those absurd speeds is to see when the M2 stops producing good results. So far, it’s doing just fine…

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