The layer fan is magic secret!

http://www.thingiverse.com/download:62984

Last month I tried to print it and realized that my Bulbul Junior couldn’t make it due to lack of cooling power. Later on I learned that to have good quality in PLA filament, layer fan is must-have device.

cDSC_0015

Yesterday I managed to install the layer fan. (http://www.thingiverse.com/thing:540716) It improved printing quality instantly. More over it literally moved capability of Bulbul Junior to next level. Printing sphere, overhang object were impractical.

Printing speed of the left side was up to 5 mm/s.
cDSC_0441

Normal printing speed over 30 mm/s created failed cups.
cDSC_0442

cDSC_0131

cDSC_0140

cDSC_0144

cDSC_0146

I’ve had 3D Printing fever for few days. Sometimes replacement of broken part required Marlin firmware hack. One week ago thermistor of E3D V6 hotend got broken. The thickness of thermistor lead is 0.2 mm according to the data sheet. I would take two to three weeks for getting the thermistor kits from E3D company in England. So I decided to install other thermistor I could buy in domestic market. I found a thermistor rating -40C to 250C made by Korean company from an online electronic shop.

Configuration.h

// 20 is 20k Samkyung NTC-20KGJG (4.7k pullup)
// 60 is 100k Maker's Tool Works Kapton Bed Thermister
//
// 1k ohm pullup tables - This is not normal, you would have to have changed out your 4.7k for 1k
// (but gives greater accuracy and more stable PID)
// 51 is 100k thermistor - EPCOS (1k pullup)
// 52 is 200k thermistor - ATC Semitec 204GT-2 (1k pullup)
// 55 is 100k thermistor - ATC Semitec 104GT-2 (Used in ParCan) (1k pullup)

// Custom thermistor
#define TEMP_SENSOR_0 20 // 5 (E3D V6 Hotend)

thermistortables.h

// Thermistor lookup table for Marlin
// ./createTemperatureLookup.py --rp=4700 --t1=25.0:20000.0 --t2=115.0:877.52 --t3=250.0:54.44 --num-temps=60

#if (THERMISTORHEATER_0 == 20) || (THERMISTORHEATER_1 == 20) || (THERMISTORHEATER_2 == 20) || (THERMISTORBED == 20)
const short temptable_20[][2] PROGMEM = {
{97, 284},
{105, 278},
{114, 272},
{124, 266},
{135, 260},
{147, 254},
{161, 248},
{176, 242},
{193, 230},
{212, 224},
{233, 218},
{257, 212},
{284, 206},
{315, 200},
{349, 194},
{388, 188},
{433, 182},
{484, 176},
{542, 170},
{609, 164},
{685, 158},
{773, 152},
{874, 146},
{991, 140},
{1126, 134},
{1282, 128},
{1462, 122},
{1672, 116},
{1914, 110},
{2195, 104},
{2519, 98},
{2892, 92},
{3320, 86},
{3809, 80},
{4363, 74},
{4985, 68},
{5675, 62},
{6431, 56},
{7245, 50},
{8105, 44},
{8996, 38},
{9897, 32},
{10784, 26},
{11636, 20},
{12431, 14},
{13153, 8},
{13792, 2},
{14341, -4}
};
#endif

Fast retraction causes early failure of Bowden drive. PTFE tube of extruder wears out. Once it starts popping out middle of printing, it’s game over. Two times in a row for two days, heavy duty Push fit that has six tiny metal teeth chewed up end of the PTFE tube on extruder. I got so pissed off by it, frustrated about stupid or silly design flaw. I started thinking how to eliminate the movement of PFTE tube on extruder, came up with gluing the tube and Push fit altogether permanently.

cDSC_0001

The first order was effector for E3D V6 hotend and I made it for free. Printed parts kit of Kossel Mini for 2020 aluminium extrusion. It’s the second order delivery. I gonna charge service fee on it. I set printing rate about 2,000.00 KRW/hour that covers operation cost of Bulbul Junior for a while. As soon as I’ll run second Reprap 3D Printer, I’ll start make some money out of 3D printing business.

Within few months I gonna have three Deltabot 3D Printers. By end of this year I plan to build at least one SLA 3D Printer by myself, including 3D scanner system that uses Open Source photogrammetry software.

cDSC_0004

cDSC_0003

cDSC_0003

Bulbul Junior in action

Six endstops, 2020 Kossel Mini kit

Stepper motor mount, 2020 Kossel Mini kit

40 mm layer fan duct kit

Turbine blade for blower motor

About janpenguin

Email: janpenguin [at] riseup [dot] net Every content on the blog is made by Free and Open Source Software in GNU/Linux.
This entry was posted in Reprap 3D Printer and tagged , , , , . Bookmark the permalink.

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s