Engines

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Engine Models

The Engine is the unenclosed model, and may be configured as follows:

CURRENT Engine Model Comparison - as of September, 2016
Model Engine SR
Standard Resolution
Engine HR
High Resolution
Heated Build Platform yes yes
Integrated Tablet PC yes yes
Initial Heads 1 1
Maximum Heads 4 4
X/Y-Axes Motion Control Belts Precision Ball Screws
Z-Axis Motion Control Precision Ball Screw Precision Ball Screw
Positional Resolution
X / Y / Z in μm
<5 / <5 / <1 <1 / <1 / <1
Positional Accuracy
X / Y / Z in μm
<50 / <50 / <10 <10 / <10 / <10
Positional Repeatability
X / Y / Z in μm
<25 / <25 / <5 <5 / <5 / <5
Precise X/Y Output
for Bioplots
100 μm lines
200 μm spacing
50 μm lines
100 μm spacing
Precise Z output
for Bioplots
25 μm layers 25 μm layers


For reference, the initial Engine configurations were as follows:

OLD Engine Model Comparison - DISCONTINUED
Model E1
Tinkerer
DISCONTINUED
E2
Hobbyist
DISCONTINUED
E3
Apprentice
SEE Engine SR
E4
Journeyman
DISCONTINUED
E5
Professional
DISCONTINUED
Heated Build Platform no yes yes yes yes
Integrated PC
& Touchscreen
or Tablet PC
no no yes yes yes
Initial Heads 1 1 1 2 4
Maximum Heads 4 4 4 4 4

Technical Data

Temperature

  • The HotBed can be heated to any temperature up to 70°C by default, and up to 110°C if reconfigured.
  • The MK-1 can be heated to 260°C (limited life); we recommend sustained use at 250°C or below. PLA, PET, ABS and Nylon work well at 225-230°C
  • The EMO-25 prints at room temperature
  • The VOL-25 can be heated to 100°C

For more details about each head, see the page for that head.

Resolution

Engine SR positional resolution is better than five microns in the X and Y (0.005mm), and better than half a micron in the Z (0.0005mm).

Engine HR positional resolution is better than half a micron in all axes (0.0005mm).

Accuracy

Engine SR positional accuracy is +/- 50 microns in the X and Y over an 8” travel area, and +/- 20 microns in the Z over an 8” travel area.

Engine HR positional accuracy is +/- 20 microns in all axes over an 8” travel area.

Repeatability

Engine SR positional repeatability is about 25 microns in the X and Y (0.025mm), and about 10 microns in the Z (0.01mm).

Engine HR positional repeatability is about 10 microns in all axes (0.01mm).

Layer Height

We have successfully printed in ABS with a 25µm (.025mm) layer height, but this is very time consuming.

  • We often use a 300µm (.3mm) layer height with the .5mm nozzle on the MK-1 for 1.75mm filaments.
  • We often use a 600 µm (.6mm) layer height with the 1mm nozzle on the EMO-25 for pasty extrudables.

Print Speed

The best print speed manageable (without sacrificing quality) is variable, and depends not only on the material being used and layer height, but also on how much mass is being moved in the X and Y. We normally print at 1.5m/min, or 25mm/sec with both the MK-1 and the EMO-25

Build Volume

Engines have a build volume of 200 x 200 x 200 mm.

Form Factor

Engines are 13” wide x 15” deep (plus 7” of rear space for spool rods), and are 21” tall plus heads, which can add another 10” to the height.

Adjustments

  • Speed of travel (at slicing or in g-code editor)
  • Layer thickness (at slicing)
  • Volume of flow per unit distance (at slicing or in g-code editor)
  • Extruder temperature (at slicing, in g-code editor, or manually during build) (MK-1, VOL-25)
  • Cooling Fan speed (at slicing, in g-code editor, or manually during build (MK-1, QS-1)
  • HotBed Temperature (at slicing, in g-code editor, or manually during build)

Or, is tabular better?

Adjustments
Metric Units During Slicing In G-Code Editor GUI During Build
Speed of Travel mm/min yes yes no
Layer Thickness mm yes no no
Flow Rate nL/sec yes yes yes
Extruder Temperature °C yes yes yes
Fan Speed  % of max yes yes yes
HotBed °C yes yes yes