Engines

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

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, or0.0002”, or 2/10 of a mil or 0.2 mils), and better than half a micron in the Z (0.0005mm, or 0.0002”, or 2/100 of a mil or 0.02 mils).

Engine HR positional resolution is better than half a micron in all axes (0.0005mm, or 0.0002”, or 2/100 of a mil or 0.02 mils).

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