Differences

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--- hyrel:hyrel [2020/10/06 04:53] – [Reference] formlab
+++ hyrel:hyrel [2020/10/12 07:55] – [Tool-head specific info] formlab
@@ Line 2: / Line 2: @@
 {{:hyrel:hyrel_3d_system_30m.png?nolink&200|}}
-Modular system with both FDM and extrusion of emulsifiable materials.
+Modular system with both FDM and extrusion of emulsifiable materials (a.k.a a paste or gel printer).
   * Max Build Volume: ''225 x 200 x 200mm''
@@ Line 16: / Line 16: @@
   * [[hyrel:General slicer info]]
   * [[hyrel:Start a print]]
+  * [[hyrel:Tips]]
   * [[hyrel:Errors]]
-Clean cylinders after each use! Not doing so will ruin them.
+---
+  * Clean cylinders after each use! Not doing so will ruin them.
+  * While it is possible to print with food products, we do not recommend it, due to the difficulty of insuring sanitary conditions.
+  * Official Repetrel info page: http://hyrel3d.net/wiki/index.php/Repetrel
+    * Check ''Prime'' & ''Unprime'' sections
+  * Head panel overrides (??)
+    * Nozzle Ø: This should be set correctly <wrap hi>(test to make sure it overrides the slic3r profile)</wrap>
+    * Layer Z in mm: this is not important, as it is overridden by G-code
 ==== Material specific info ====
@@ Line 27: / Line 35: @@
 ==== Tool-head specific info ====
+  * [[hyrel:Emo-25]] - For emulsifiables at room temperature
   * [[hyrel:VOL-25]] - For heated emulsifiables
+  * [[hyrel:MK1-250]] - for plastic filament
+  * [[hyrel:Luer-tips]] - needles for the Emo-25 head
-==== Cleaning ====
+==== Tests ====
-  - **Clean the cylinders after each use!** Not doing so will ruin them.
+The first print was perfect. All consequent prints were bad. For the first layer, the nozzle moves too fast, tearing the printed line, and dragging it over the build plate. This is what under-extrusion looks like with Plasticine. Even after selecting a default profile this happens. There's G-code and the Head-control-settings. Trying to figure out what overrides what.
-  - Cleaning bees wax: hold part with pliers, heat up with very hot water. Wipe off with paper towel. Clean threads with a pin
-  - Cleaning Plasticine
+  * Does the **prime duration** influence the print? (does the print fail because the head was badly primed?)
+    * Slic3r profile has set a line-width of 1,65mm.
+    * Head-control has a set a nozzle diameter of 1,5mm.
+    * Priming ±10cm of material, then pressing start.
+    * --> No influence (no better result than not priming extra long)
+  * Does the **prime speed** influence the print?
+    * ''500'' (rpm?): first layer tears off build plate
+    * ''10000'' (rpm?): first layer tears off build plate
+    * --> No influence
+  * Does the head-control **material flow rate** influence the print?
+    * Default value ''1.0'' (this is 100%): first layer tears off build plate.
+    * ''2.0'': better, but first layer still tears off build plate.
+    * ''2.5'': good first layer, but all consecutive layers were way too wide.
+    * --> **Yes, this has a definitive influence**
+  * A thicker first layer height (Slic3r print profile)
+    * Up till now all layer heights were the same. Maybe increasing the first layer could help with the adhesion.
+    * regular layer height: 0.3mm
+    * first layer height: 2.5mm
+    * --> First layer failed. All consecutive layers failed too.
+    * This was not a test of finding out influence. This is purely Slic3r-profile driven.
+    * <wrap hi>Do this test again, with a more subtle setting.</wrap>
+  * Could it be temperature?
+    * Environment temperature:The lab is very cold now, making the plasticine way less viscous. Try printing again when it's warmer
+    * --> **Yes, A room temperature of ''±20°C'' makes plasticine print. It under extrudes when colder.**
+  * Slower speed helps (no tearing), but lines are a little crumbly at ''1.5w, 0.5z, 5f 0pct''?
+  * Material Flow Rate Multiplier (in the Head-control section). Adjustments are sent to print head when pressing enter, or when clicking outside the number box (setting the cursor in another number box). This setting is thus live and overrides the Slic3r material flow parameter.
+  * Head Control - Nozzle size overrides the nozzle size set in Slic3r.
-== Heated toolholder ==
-Insert cylinder in heated holder
+A successful print
-  - unscrew the cylinder front collar
+  * 16:40 afternoon (meaning, the heating has been on all day)
-  - slide cylinder down in the toolholder
+  * 3D model: ''Formlab testcylinder 8x.stl''
-  - tighten the 3 bolts of the toolholder
+  * Slic3r profile
-  - reattach front collar to the cylinder
+    * Print: ''Formlab plasticine defaule 10''
+    * Printer: ''Unheated bed''
+    * Extr 2''NoHeat, NoFan, NoBed''
+  * Head-control
+    * Nozzle Ø: 1.6mm
+  * A small amount of priming at 500
+  * Start Print
+  * I raised the bed with one 'click', but this might not have been necessary
-Remove cylinder from heated holder:
+Aha-moment: Extrusion width seems to only define line to line distance. It doesn't change the flow rate.
-  - unscrew the cylinder front collar
+  * {{:hyrel:2020_10_08_plasticine_first_layer_width_3mm_web.jpg?400|}}\\ 1st layer extrusion width of 3mm: good bed adhesion, perfect lines (''Formlab plasticine defaule 10'').
-  - unscrew the 3 bolts of the toolholder
+  * {{:hyrel:2020_10_08_plasticine_first_layer_width_6mm_web.jpg?400|}}\\ 1st layer extrusion width of 6mm: good bed adhesion, perfect lines (''Formlab plasticine defaule 10'').
-  - slide cylinder upward
+  * --> So maybe the room and material temperature are more important than flowrate.
-==== Tips ====
-  - Cylinders can be swapped out for larger volume prints.
-    - M0 x0 y200 (Pauses the print and brings the tool head forward so the current cylinder can be swapped out for a new one. When ready, press continue).
-  - Keep cylinders CLEAN. Dry material inside is the #1 problem.
-  - No air in cylinders. Air will make the material delivery spongy. Accurate control is impossible this way.
-  - manuals are at ''Desktop > repetrel > Manuals''. Check the ''Accessories'' folder for manuals about the toolheads.
-  - <wrap hi>Choosing another Slicer Profile</wrap>
-    - Make sure you <wrap hi>select first the project file (Main) and then the 3D object</wrap> in the project window <wrap hi>before choosing a new slicing profile</wrap>. This is a quirk of the Repetrel software. Make sure to Add consistent notes to the slicer profiles, so you can notice them in the G-code preview (they are printed on top of the file). This makes it easier to see exactly which profile you selected
-==== Disclaimer ====
+Future tests
-  - While it is possible to print with food products, we do not recommend it, due to the difficulty of insuring sanitary conditions.
+  * Do a visual test (video recording?) with lines on paper to see if the printer really moves 8mm/s. I have a feeling the printer moves faster than the first successful print.
+    * 5mm/s or 8mm/s is not a problem when material is at room temperature (when the lab is not cold)
+  * Try printing again with a heated bed (20°
+  * Unrelated to this problem: I should try out more aggressive prime and unprime settings. (Definite influence).
+==== Issues ====
+  * Printer sometimes doesn't wait until desired temperature is reached.
+  * After stopping the print (Kill function), **reset Z-zero**
+==== Random knowledge ====
+  * ''M756'': S[layer thickness in mm] - for flow calculation
+  * ''M221'': sets flow rate
+  * ''M104'': print temperature
+  * Davo 01/10/2015
+    * **Reset**: will reboot the 407 motion controller
+    * **Aux**: will toggle a relay, which can be used to allow or deny power to an auxiliary item like an air filter or heater
+    * **Respond**: was intended to be used to resume after a pause, but I don't know if it's enabled yet