Differences

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--- mini_flow [2018/12/27 22:10] – yair
+++ mini_flow [2018/12/31 12:45] (current) – [test setup] yair
@@ Line 1: / Line 1: @@
-==== setup ====
-ceramic heaters just [[https://www.aliexpress.com/item/12V-400C-30mm-Diameter-Round-MCH-Metal-Ceramic-Heater-Plate-Heating-Element/32686074262.html|arrived]].
+==== what ====
+ceramic heaters just [[https://www.aliexpress.com/item/12V-400C-30mm-Diameter-Round-MCH-Metal-Ceramic-Heater-Plate-Heating-Element/32686074262.html|arrived]]. PTC is an [[https://en.wikipedia.org/wiki/Heating_element#Polymer_PTC_heating_elements|amazing material]]
-PTC - [[https://en.wikipedia.org/wiki/Heating_element#Polymer_PTC_heating_elements|amazing material]]
+we are intrested in small reflow ovens for workshops, to remove the need for soldering smd with cheap irons.
-but goofed the setup and placed the ceramic heater on top of a huge copper heatsink (idiot.io)
+mybe call it uBake ?
+==== test setup ====
-{{ :pasted:20181227-201019.png?500&direct}}
+{{:pasted:20181227-105028.png}}
-{{:pasted:20181227-200604.png?500&direct }}
+first tested on bench with no heat load.\\
+it takes 12DCV 5A ramping up\\
+when it reaches 410C (rated at 400c) it stabilize on 3A
+this allows for relatively precise ramping using current control.
+using a benchtop psu or lm317(?) you can make a very simple reflow profile.\\
-then moved to a more suitable setup and it was a breeze
+{{::basic.mp4?700x500|}}
+placed the ceramic heater on top of a huge copper heatsink (idiot)
-it takes 5 amps ramping up and when it reaches 410C (rated at 400c) it stabilize on 3A
-using a benchtop psu you can make a very simple reflow profile.\\
+{{:pasted:20181227-201019.png?400&direct}} {{:pasted:20181227-200604.png?400&direct}}
-ot that my quickie low temp solder didn't zip into place\\
-i was so shocked by the low temp i couldn't believe my eyes and kept ramping the current to 220 :)
-{{ :rec013_shrt.mp4 |}}
+then moved to a more suitable setup
+{{:2018-12-27_20-54-45_chrome_photo_in_ubake_-_google_photos_-_google_chrome.png?500}} {{:ubake.png?500}}
+i used microprint 2004p (Sn62 Pb36 Ag2, 20-38 µm (T4)) ({{ ::dsh.745-035.1.pdf |pdf}},{{ :bel.745-035.3.pdf |pdf2}})\\
+with a claimed melting point of 179°C
+{{::bake-720p.mp4?700x500|}}
+{{:rec013_shrt.mp4?700x500|}}
+==== omg ====
+{{youtube>aqR4_UoBIzY?medium}}
+==== to test ====
   * 12V-400C-30mm-Diameter-Round-MCH-Metal-Ceramic-Heater-Plate
     * [[https://www.aliexpress.com/item/12V-400C-30mm-Diameter-Round-MCH-Metal-Ceramic-Heater-Plate-Heating-Element/32686074262.html|aliexpress]]
 {{:pasted:20181227-104344.png?400}}
-{{:pasted:20181227-105028.png}}
@@ Line 36: / Line 50: @@
 {{:pasted:20181227-104729.png?400}}
+==== PID ====
+https://electronics.stackexchange.com/questions/215418/smartest-way-to-use-current-limit-using-lm317
+and polyfuse?