Difference between revisions of "EMO"

Revision as of 16:31, 1 April 2017

The EMO-25 is our 25cc print head for medium viscosity emulsions which print at room temperature.

This includes the following materials:

Clays
Pastes
Emulsions

Videos

Overview of Cold and Warm Flow Print Heads:

Overview of the EMO and COD Heads

Loading and Printing Tips:

Description

The EMO-25 has a 25cc anodized aluminum reservoir with a threaded collar at each end. The top has a threaded rod, which is how material is displaced; the bottom holds a nozzle, or a nozzle or luer adapter. Industry standard luer tips or needles are available from a variety of sources.

Loading the Head onto the Printer

As with all Hyrel heads, the following process should be followed:

Start with a level bed and Repetrel running and connected to the printer.
Load the gibs on the Head into the gib slots on the Yoke from above and slide the head down into place; the last mm of travel should be done gently, ensuring that the electrical connector seats properly (firmly and completely) into the receiving connector.
Ensure the LEDs on the print head are flashing - this means the Head is communicating with the Motion Controller.
Tighten the thumbscrew in the rear, to prevent the head from moving relative to the Yoke.
If the Head doesn't show up in Repetrel, press and release the RESET button on the front of the printer.
Once the Head is shown in repetrel, proceed to setting your Z-Zero position.

Loading material into the Head

Loading:

Care should be taken to avoid air pockets, as this will introduce delay when starting and stopping material flow.

Unloading:

Unloading is the same process as loading, only in reverse. Tubes and nozzles should be cleaned thoroughly after use.

Default Parameters

Default settings for all MK series heads are shown on the Cold_and_Warm_Flow page.

Adjustments

The only adjustments needed should be changes to the PRIME and UNPRIME settings, and will have to be dialed in based on how viscous and compressible your material is, and how narrow a nozzle or luer tip you are using.. In dialing in new settings, I usually double or half the settings for both STEPS and TIME, then make another print and reassess.

Firmware

Please see the Downloads page for the current firmware for your heads and your version of Repetrel.

Maintenance

While cleaning your print media from the tube and nozzle after every print is important, very little other maintenance is required on this head.

@@ Line 5: / Line 5: @@
 |}
-The XXXX is our XXXX print head, and works with XXXX which print at temperatures XXXX °C.
+The EMO-25 is our 25cc print head for medium viscosity emulsions which print at room temperature.
-[[File:MK1-450.png|200px|left|MK1-450]]
+[[File:EMO-25.png|200px|left|EMO-25]]
 This includes the following materials:
 <div style="column-count:3;-moz-column-count:3;-webkit-column-count:3">
-*XXXX
+*Clays
-*XXXX
+*Pastes
-*XXXX
+*Emulsions
 </div>
 == Videos ==
-# '''General MK Series Videos:'''
+# Overview of Cold and Warm Flow Print Heads:
-## [[File:Yt.png]] [https://www.youtube.com/watch?v=Fg9omXlYR-Q MK Series Printing Tips]
+* [[File:Yt.png]] [https://www.youtube.com/watch?v=ktK256u0sN8 Overview of the EMO and COD Heads]
-## [[File:Yt.png]] [https://www.youtube.com/watch?v=0Aj9WCabPgw Post Processing with a Heat Gun]
+# Loading and Printing Tips:
-## [[File:Yt.png]] [https://www.youtube.com/watch?v=Llas80vYFPc Loading and Unloading Filament in the MK Series head]
+* [[File:Yt.png]] [https://www.youtube.com/watch?v=tLHpaePTP-k EMO Series Printing Tips]
-# '''MK1-450''' Extruder for High-Temperature Filament Videos:
+* [[File:Yt.png]] [https://www.youtube.com/watch?v=4yuzpUqeE-Y Loading the EMO-25]
-## [[File:Yt.png]] [https://www.youtube.com/watch?v=UvZMecXsHEM Overview]
+* [[File:Yt.png]] [https://www.youtube.com/watch?v=IEmQJxlPnuY More Loading the EMO-25]
-## [[File:Yt.png]] Loading and Printing
+* [[File:Yt.png]] [https://www.youtube.com/watch?v=q-DbAbNMW48 Loading and Printing with the EMO-25]
 == Description ==
-# The MK1-450 is fed filament from the top, through low friction tubing (2mm ID, 4mm OD) seated into a 4mm pneumatic fitting.
+* The EMO-25 has a 25cc anodized aluminum reservoir with a threaded collar at each end. The top has a threaded rod, which is how material is displaced; the bottom holds a nozzle, or a nozzle or luer adapter. Industry standard luer tips or needles are available from a variety of sources.
-# A cover plate maintains pressure, via a spring, against a rod with two bearings; these bearings keep the filament pressed against and centered on the gibbed (toothed) portion of the drive shaft of the stepping motor.
-# Beneath this, the filament enters into a 2mm ID PTFE guide tube, which leads the filament to a stainless steel delivery tube (due to temperatures too high for the PTFE) and thence to the brass nozzle. The stainless steel heats up to some extent, allowing for pre-heating of the filament.
-# At the nozzle, heat is transferred to the filament, whereupon it is forced out through the brass nozzle.
 == Loading the Head onto the Printer ==
@@ Line 47: / Line 44: @@
 == Loading material into the Head ==
-MK1-450 heads all ship with a remaining piece of filament from the last test print. We recommend leaving a few cm of filament above the head when changing heads.
+Loading:
+* Care should be taken to avoid air pockets, as this will introduce delay when starting and stopping material flow.
 Unloading:
-# With the head properly seated and the emergency stop OUT, warm the head to the service temperature of the presently loaded material.
+* Unloading is the same process as loading, only in reverse. Tubes and nozzles should be cleaned thoroughly after use.
-# If presently loaded to a spool, press down on the blue pneumatic fitting and release the guide tubing; then cut the filament a few cm above the head.
-# Press the manual feed lever (at the top left of the head's 103 circuit board) to the left, retracting the filament. Retract until the filament comes free of the motor shaft, then remove.
-Loading:
-# Straighten (if needed) the last few cm of the new filament, which should be routed through the guide tubing. Insert it down through the pneumatic fitting on the top and centered between the two bearings, between the bearings and the drive shaft of the motor.
-# Press the manual feed lever to the right, advancing the filament until the lead end advances into the white PTFE tube.
-# In repetrel, click the motor on at 500 (pulses per minute) until the new filament advances to the melting zone and forces the old filament out. Advance about 30cm of filament, checking for smooth sides and uniform color.
-# Remove excess filament with tweezers. Seat the guide tubing. You are ready to go.
 == Default Parameters ==
-Default settings for all MK series heads are shown on the [[Filaments]] page.
+Default settings for all MK series heads are shown on the [[Cold_and_Warm_Flow]] page.
 == Adjustments ==
-The only adjustments needed should be changes to the PRIME and UNPRIME settings, and then only if your material is particularly flexible or compressible. In dialing in new settings, I usually double or half the settings for both STEPS and TIME, then make another print and reassess.
+The only adjustments needed should be changes to the PRIME and UNPRIME settings, and will have to be dialed in based on how viscous and compressible your material is, and how narrow a nozzle or luer tip you are using.. In dialing in new settings, I usually double or half the settings for both STEPS and TIME, then make another print and reassess.
 == Firmware ==
-MK1-450 heads all have platinum RTD wires, and therefore use the firmware labeled "FILAMENTS_33A.hex" or "hothead.mk400.33A.hex" (these are actually the same file with different names).
+Please see the [[Downloads]] page for the current firmware for your heads and your version of Repetrel.
 == Maintenance ==
-Very little maintenance is required on this head. Use a wire brush or tweezers to remove any excess plastic on the nozzle, and use a shop vac or air hose to suck or blow away any buildup of eroded filament in the feed chamber and/or on the hobs (teeth) of the motor shaft.
+While cleaning your print media from the tube and nozzle after every print is important, very little other maintenance is required on this head.