Difference between revisions of "EHR"

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== EHR - Engine, High Resolution ==
The EHR is our High Resolution unenclosed printer designed for bioprinting on the desktop or inside of a fume hood.


The Engine is the unenclosed model, and may be configured as follows:
[[File:EHR.png|400px]]


{| border="1" class="wikitable" style="text-align: center"
== Technical Data ==
|+ CURRENT Engine Model Comparison - as of January, 2021
 
! Model
Technical specifications and accessory compatibility for printers currently shipping are detailed in the comparison chart on the '''[[Printer Overview]]''' page.
! Engine SR <br> Standard Resolution
 
! Engine HR <br> High Resolution
== History ==
|-
 
! Image
All improvements introduced were implemented to the existing line, obsoleting previous versions (with no price increases):
| <gallery>File:ENG.jpg</gallery> || <gallery>File:EHR.png</gallery>
 
|-
* The EHR was introduced in 2016, equipped with precision ball screws in all axes. It is able to print in wellplates and fits in most fume hoods.
! Heated Build Platform
* We introduced sub-ambient (chilled) beds and syringe heads specifically for the EHR in 2020.
| yes || yes
* The EHR v2 began shipping in January 2021, equipped with better motors with closed-loop feedback and quieter operation.
|-
* As of June 2021, all units are CE marked.
! Integrated Tablet PC
 
| yes || yes
== Internals ==
|-
! Initial Heads
| 1 || 1
|-
! Maximum Heads
| 4 || 3
|-
! X/Y-Axes Motion Control
| Belts || Precision Ball Screws
|-
! Z-Axis Motion Control
| Precision Ball Screw || Precision Ball Screw
|-
! Positional Resolution <br> X / Y / Z in μm
| <10 / <10 / <1 || <1.25 / <1.25 / <1
|-  
! Positional Accuracy <br> X / Y / Z in μm
| <50 / <50 / <10 || <12 / <12 / <10
|-
! Positional Repeatability <br> X / Y / Z in μm
|  <25 / <25 / <5 || <12 / <12 / <5
|-
! Precise X/Y Output <br> for Bioplots
| 100 μm lines <br> 200 μm spacing || '''50 μm lines <br> 100 μm spacing'''
|-
! Precise Z output <br> for Bioplots
| 25 μm layers || 25 μm layers
|-
|}


Here is an explanation of the internal electronics of the EHR; click any images for larger versions:


For reference, the initial Engine configurations were as follows:
=== Controls Compartment ===
{| border="1" class="wikitable"
|+ <span style="color:red">OLD Engine Model Comparison - DISCONTINUED</span>
! Model
! E1 <br/> Tinkerer <br> <span style="color:red">DISCONTINUED</span>
! E2 <br/> Hobbyist <br> <span style="color:red">DISCONTINUED</span>
! E3 <br/> Apprentice <br> <span style="color:green">SEE Engine SR</span>
! E4 <br/> Journeyman <br> <span style="color:red">DISCONTINUED</span>
! E5 <br/> Professional <br> <span style="color:red">DISCONTINUED</span>
|- style="text-align:center;"
! Heated Build Platform
| no || yes || yes || yes || yes
|- style="text-align:center;"
! Integrated PC <br/> & Touchscreen <br/> or Tablet PC
| no || no || yes || yes || yes
|- style="text-align:center;"
! Initial Heads
| 1 || 1 || 1 || 2 || 4
|- style="text-align:center;"
! Maximum Heads
| 4 || 4 || 4 || 4 || 4
|}


== Technical Data ==
The interior of the EHR holds the ATX Power Supply, the Tablet Interface Board, and the X, Y, and Z Axis controllers.
 
=== Adjustments ===    
[[File:ESR_Internals_2021.jpg|600px]]
* Speed of travel (at slicing or in g-code editor)
 
* Layer thickness (at slicing)
=== Tablet Interface Board ===
* 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)
Tablet Interface Board (with STM407 Motion Controller) has Internal and External Ports.
* 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?''
The current board, circa 2021.


{| border="1" class="wikitable"
[[File:16A_TIB_2021_L.jpg|600px]]
|+ 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
|-
|}

Latest revision as of 14:01, 24 June 2021

The EHR is our High Resolution unenclosed printer designed for bioprinting on the desktop or inside of a fume hood.

EHR.png

Technical Data

Technical specifications and accessory compatibility for printers currently shipping are detailed in the comparison chart on the Printer Overview page.

History

All improvements introduced were implemented to the existing line, obsoleting previous versions (with no price increases):

  • The EHR was introduced in 2016, equipped with precision ball screws in all axes. It is able to print in wellplates and fits in most fume hoods.
  • We introduced sub-ambient (chilled) beds and syringe heads specifically for the EHR in 2020.
  • The EHR v2 began shipping in January 2021, equipped with better motors with closed-loop feedback and quieter operation.
  • As of June 2021, all units are CE marked.

Internals

Here is an explanation of the internal electronics of the EHR; click any images for larger versions:

Controls Compartment

The interior of the EHR holds the ATX Power Supply, the Tablet Interface Board, and the X, Y, and Z Axis controllers.

600px

Tablet Interface Board

Tablet Interface Board (with STM407 Motion Controller) has Internal and External Ports.

The current board, circa 2021.

16A TIB 2021 L.jpg

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