PrinterZero
PrinterZero - 3D Printer designed and built from the scratch including components like: Mainboard, Stepper motor drivers, Power distribution module, Extruder Board, all Mechanical components. The following parts has been reused with modifications: Sprinter as target software, Pronterface as host software, parts of the extruder.
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Monday 27 January 2014
Monday 18 November 2013
Friday 15 November 2013
Universal -1.75/3mm, direct drive extruder for Nema 17/23
Direct drive extruder equiped with the following features:
- simplicity - as little components as possible
- independent from drive gear diameter ( 7 - 11 mm)
- integrated motor and drive gear cooling
- support nema17 and nema23 motors
- independent from hotend type
- support for any filament diameter from 1.5-3mm
- open design in open scad format
more on http://www.thingiverse.com/thing:183982
- simplicity - as little components as possible
- independent from drive gear diameter ( 7 - 11 mm)
- integrated motor and drive gear cooling
- support nema17 and nema23 motors
- independent from hotend type
- support for any filament diameter from 1.5-3mm
- open design in open scad format
more on http://www.thingiverse.com/thing:183982
Thursday 17 October 2013
Mendel90 improvement set - Z axis stabiliation
Mendel90 is a great design, but the 8mm threaded rod for Z drive has tendency to wobble. In addition X axis is directly supported on motors only, which leads to little changes in Z position.
Set below lets to hang 8mm rod on ball bearings and prevent its wobble. X axis is more stable in Z direction.
Set below lets to hang 8mm rod on ball bearings and prevent its wobble. X axis is more stable in Z direction.
Monday 10 June 2013
Autonomous 3D Printer
Printing because of his nature is quite time consuming operation. On the way to shorten printing time we set up environment which lets us make printing as much automatic as possible.
System consists of following elements:
Printing scenario is as follow:
1. Login via VNC remote desktop
2. Run Start Printer script,
3. Load 3D model and press Print
4. Take objest from the printer
Because of Start/Stop script in skeinforge you do not have to care about, heating, head positioning,...
Any time you can login and take a look via vision system if printer is working properly.
What further ? Quick release bed, maybe like Nop head's best in class solution http://hydraraptor.blogspot.com/2010/01/quick-release-bed.html
System consists of following elements:
- Hp 5720 VIa 1Ghz 512MB
- Wi-fi usb card
- 16 GB USB stick
- USB Web Camera
- USB to TTL converter
- Terminal Software
- Debian as operating system
- VNC-Server as remote desktop
- SSH Server
- SAMBA Server
- Camorama as vision system
- Scripts to start stop printer
- Pronterface
- Skeinforge + Start, Stop cripts
- Additional Hardware
- LED light
- Power Strip with relay driven by optocoupler + LPT Cable
- 3D Printer based on Mendel 90 frame
Printing scenario is as follow:
1. Login via VNC remote desktop
2. Run Start Printer script,
3. Load 3D model and press Print
4. Take objest from the printer
Because of Start/Stop script in skeinforge you do not have to care about, heating, head positioning,...
Any time you can login and take a look via vision system if printer is working properly.
What further ? Quick release bed, maybe like Nop head's best in class solution http://hydraraptor.blogspot.com/2010/01/quick-release-bed.html
Monday 15 April 2013
Saturday 12 January 2013
Ceramic Hotend
Looking for alternatives for conventional hotends and their problems with heat barrier we decided to try ceramic one. After many trials concluion is that ceramic hotend has to high thermal conductivity. Active cooling is needed. Power consumption by ceramic part is about 20W !
Test results below:
Tests output:
Constant parameters:
- Environment temperature : 21C
- Resistor 5.6 Ohm, 5x16 mm
Day I:
Conditions: Not isolated Hotend at 230 C and bare Ceramic.
Result: Heating time: 11 min, After 30 minut cold end 110C.
Day II:
Conditions: Not isolated Hotend at 230 C and Ceramic barrier with little alloy radiator. Result: Heating time: 12.30 min, After 30 minut cold end 102C.
Conditions: Isolated Hotend by silicone coating at 230 C and bare Ceramic.
Result: Heating time: 22 min ??!!, After 30 minut cold end 110C.
Constant parameters:
- Environment temperature : 21C
- Resistor 4.7 Ohm, 5x16 mm
Test I:
Conditions: Isolated Hotend by silicone coating at 230 C and bare Ceramic, No cooling.
Result: Heating time: 7 min , After 30 minut cold end 110C.
Test II:
Conditions: Isolated Hotend by silicone coating at 230 C and bare Ceramic, Active cooling, by direct air flow..
Result: Heating time: 12 min , After 30 minut cold end 95C.
Test III:
Conditions: Isolated Hotend by silicone coating at 230 C and bare Ceramic, Passive cooling, by little radiator.
Result: Heating time: 8 min , After 30 minut cold end 95C.
Test IV:
Conditions: Isolated Hotend by fire resistant concrete coating at 230 C and bare Ceramic, No cooling.
Result: Heating time: 5.min, 30 sec After 30 minut cold end 95C.
Test V:
Conditions: Isolated Hotend by fire resistant concrete coating at 230 C and bare Ceramic, Active cooling, by direct air flow. Result: Heating time: 7.min, 30 sec After 30 minut cold end 45C.
Test VI:
Conditions: Isolated Hotend by fire resistant concrete coating at 230 C and bare Ceramic, Pasive cooling with alloy radiator . Result: Heating time: 6.min, After 30 minut cold end 90C.
Test VII:
Conditions: Isolated Hotend by fire resistant graphit tape coating at 230 C and bare Ceramic, Active cooling with alloy radiator . Result: Heating time: 5.min, 30 sec., After 30 minut cold end 55C.
Test VIII:
Conditions: Isolated Hotend by fire resistant graphit tape coating at 230 C and bare Ceramic, Pasive cooling with alloy radiator . Result: Heating time: 5.min, 0 sec., After 30 minut cold end 90C.
Day V:
Constant parameters:
- Environment temperature : 21C
- Resistor 3.3 Ohm, 5x16 mm
Test I:
Conditions: Isolated Hotend by silicone coating at 230 C and bare Ceramic, Passive cooling, by little radiator.
Result: Heating time: 3.25 min , After 4 minut col end 55C, after 30 minut cold end 100C.
After offline tests, first ceramic hotend prototype ready for deployment:
Additional photos:
Monday 12 November 2012
Polyamide Bushing
Ball bearings are great because of precision and durability, but problematic because of noise during operation. Solution for this problem can be polimer bushing. Below you can see first home made Polyamide Bushings. They will be tested next weeks.
BTW:
All the photos we made so far are available at: https://docs.google.com/folder/d/0B8i80MYoMl1xaExvNHFEaUNWdjQ/edit?pli=1
Polyamide Bushings |
Polyamide Bushings |
All the photos we made so far are available at: https://docs.google.com/folder/d/0B8i80MYoMl1xaExvNHFEaUNWdjQ/edit?pli=1
Hotbed
First hotbed we created from 5mm alloy plate, heated by 12 x 10W ceramic resistors. Resistors has been glued using fire resistant glue, it seems to be perfect. Bed is being used for nearly one year without any issues.
New generation bed's are made from 4mm alloy, with working area 250 x 250mm. Power over 160W lets heat the bead in les than 10 minuts.
Hot bed is located on the solid base with thermal insulation in the middle.
First hotbed prototype |
New generation bed's are made from 4mm alloy, with working area 250 x 250mm. Power over 160W lets heat the bead in les than 10 minuts.
Latests Hotbed's |
Hot bed is located on the solid base with thermal insulation in the middle.
Hotbed base with thermal resistant nuts. |
Saturday 27 October 2012
Full blown test environment
All electronics components has been connected. We added unipolar stepper motor driver to target software. Additionally switchover from ATMEGA644P to ATMEGA32 has been tested.
Firsts tests take place.
Mini unipolar stepper motor with gear box:
Middle unipolar stepper motor:
Bipolar nema17 stepper motor:
On / Off of Heatbed and Hotend:
So far no problems.
Firsts tests take place.
Mini unipolar stepper motor with gear box:
Middle unipolar stepper motor:
Bipolar nema17 stepper motor:
On / Off of Heatbed and Hotend:
So far no problems.
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