Differences

This shows you the differences between two versions of the page.

--- projets:jenny [2020/04/19 15:55] – [Slicer] mh
+++ projets:jenny [2022/04/25 22:20] (current) – [Next Steps] mh
@@ Line 1: / Line 1: @@
 ====== Jenny ======
-This is Jenny's project page, created when I upgraded Jenny from a Prusa Mendel i2 to an i3
+This is Jenny's project page, created when I upgraded Jenny from a Prusa Mendel i2 to an i3.
 ===== Specs =====
@@ Line 28: / Line 28: @@
 ===== Pics =====
-{{projets:jenny_i3.jpg?400}}{{projets:jenny_i3_assembly.jpg?400}}
+|  {{projets:jenny_i3.jpg?367}}  |  {{projets:jenny_i3_assembly.jpg?400}}  |
+|  Nearly completed  |  An early mess but operational  |
 ===== Upgrades =====
@@ Line 94: / Line 95: @@
 I tested it out but the eMotronic board I ordered differs from the smoothieboard project in a few ways. First, the entire PCB was redesigned by eMotion Tech and most of the pin numbers were reaffected. Documentation of the eMotronic is at the time of writing rather poor and scarce.
-I encountered some major problems with the Z motors and manual control rendering the board impossible to use. As I thought the board was defective I sent it back to shop for revision and testing. They found no fault on the drivers so they are sending it back to me.
+I encountered some major problems with the Z motors and manual control rendering the board impossible to use. As I thought the board was defective I sent it back to shop for revision and testing. They found no fault on the stepper drivers so they sent it back.
-In the meantime, I have reverted Jenny back to the good old Mega + Ramps marlin-based controller.
+**As it turns out the eMotronic board takes many liberties with the original smoothieboard design and is not an easy implementation on an i3-type architecture.**
-This motherboard upgrade also saw a full change of all 4 stepper motors controlling X, Y and Z.
+Jenny still runs on the good old Mega + Ramps with a 2.0+ marlin firmware.
+She also has brand new stepper motors for controlling X, Y and Z.
+----
+==== New Fan Duct ====
+I redesigned the fan duct of the radial fan cooling the print. The problem with the first design was the large flat bottom surface too close to the print that would hit on any print part warping during print.
+|  {{projets:jenny_new_fan_duct.jpg?300}}  |
+It requires supports to print but does it's job perfectly.
+  *__**Files :**__ [[https://mh8.fr/resources/files/mh8_fan_duct_v3.stl|Download STL]]
+  *__**Design :**__ mh8
 ----
@@ Line 106: / Line 122: @@
   *Try some new gcode on print stop line 1050 of configuration_adv.h (try multiple successive commands)
-  *Design a new exhaust piece for cooler radial fan
+  *Design some new PSU fasteners for the new PSU unit so it is fixed on the Z frame
@@ Line 112: / Line 128: @@
   * Lookout for resonance on the cooler radial fan
-  * Upgrade to a smoothie board
   * Measure % offset on size to get exact dimensions -> print test part, measure, compensate x,y,z, print again
   * Update wiki with Marlin firmware (latest), a backup of Printer/Prusament profiles for prusa-slicer, etc..
-  * Buy [[https://fr.rs-online.com/web/p/alimentations-a-decoupage/1748146/|a compact power supply]] and integrate on Jenny's front underside/or side of frame
   * Ground the frame to the power supply
   * Run a printer safety check page according to RepRap Wiki
@@ Line 155: / Line 169: @@
 ==== Upgrade to Marlin 2.0.5 - April 2020 ====
-<WRAP round info>
+<WRAP download round>
-Jenny's Z probe was not reliable and I was having difficulty getting consistent first layers without tweaking the settings at every print.
+[[https://mh8.fr/resources/files/Marlin-2.0.5-Jenny-04-2020.zip|Jenny Marlin 2.0.5 Slic3r Backup - April 2020]]
+</WRAP>
+**Jenny's Z probe was not reliable** and I was having difficulty getting consistent first layers without tweaking the settings at every print.
 I reverted Jenny to a more reliable mechanical endstop to control Z min and at the same time updated Marlin to latest version and reconfigured it from scratch.
-</WRAP>
 === configuration.h ===
@@ Line 242: / Line 259: @@
 === Thermal Protection - configuration_adv.h ===
-<WRAP round info>
 During one of the first prints after upgrade I had a false positive of a bed temperature hysteresis.
@@ Line 248: / Line 264: @@
 Thermal protection for the heated chamber should not have any incidence since Jenny is not equipped with a heated chamber nor a sensor for that function but it was kept activated nonetheless just in case it's of any use that I don't know of.
-</WRAP>
 <code c>
 // Tolerance increased (2 -> 8) and Time increased (20 -> 30) for Thermal hysteresis on bed
@@ Line 266: / Line 282: @@
 </code>
-<WRAP round tip>
+<WRAP round info>
 I closely monitored a 7 hour print and found the following :
@@ Line 382: / Line 398: @@
 G28 ; home all axes
 G0 X100 Y100 Z20 F4000 ; Center on bed and lift Z a bit so we can clean any drooling filament
+M82  ; use absolute distances for extrusion
+G92 E0 ; reset extrusion
+G1 E10 F1000 ; prime
 G4 S4 ; Wait 4 seconds
 M109 S200 ; wait for nozzle temp
@@ Line 444: / Line 463: @@
   * Push **First Layer Height** (0.3 for 0.4mm nozzle)
   * Lower **First Layer Print Speed** (20-30 mm/s)
+===== 3D Modeling Tips =====
+To get pieces that should snap in together, like notches, leave a 0.35mm space margin between both pieces in model.
+In every case, it's worth it to just print a test part of the parts that need to snap together to test different values.
 ===== System Calibration Logs =====