Micron3DP COBRA Extruders Line

Micron3DP presents their new COBRA Extruders Line!



The COBRA line includes: the COBRA single extruder , COBRA dual extruder, COBRA J-Head compatible extruder and COBRA bowden/rostock.

It is priced at 330 USD range.

COBRA homepage:

http://micron3dp.com/collections/all-metal-extruders

Features and technical specifications from product page:

• Excellent performance with flexible materials
• Light weight and compact design
• Extremely fast and reliable printing with flexible materials such as NinjaFlex and PVA
• Small light weight package 
• 100% All-Metal enables reliable and continuous printing up to 315 deg c. 
• Unlike other extruders (No Teflon tubing or plastic parts inside the hot-end).

Key Features:

• Like all Micron 3DP extruders & hot-ends, the Cobra extruder line comes with the patent pending easily replaceable nozzle and guide.
• It takes less than a minute to switch to a different nozzle size or to a different material, without changing the calibration of the Z height.
• Reliable design: Cobra extruders use a small but powerful 1:13 planetary geared motor equipped with a 304 stainless steel hobbed gear. Including a special tooth profile which provides strong filament gripping.
• Continuous idler bearing with preload adjustment, using 2 set screws
• Easy opening service door that maintains idler bearing preload while opening and closing.
• Short and Smooth filament feeding design that prevents the filament from jamming after passing the hobbed gear.
• Test proven with PLA, ABS, polycarbonate, nylon, Carbon PLA, HPIS, Ninjaflex and PVA.
• High flow rate package available, sold separately.

Electrical Specification:

• Step motor rated current/Phase: 0.67 Amp. Rated voltage/Phases: 6.2 VDC
• Fans: 30x30x10, 12V or 24V (specify)
• Heaters: 12V or 24V (specify), 60 watt
• Thermistors: EPCOS 100K thermistor (B57540G0104F000)

Mechanical Specification:

• 1:13 Motor: Nema 11 Planetary Gearbox step Motors
• Materials: black anodize Aluminum 6061-T651 housing, Stainless Steel 304 hobbed gear and Brass nozzle
• Filament size: 1.75mm
• Available nozzles diameter: 0.35mm and 0.5mm.
• Total weight: 360 gram

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Micron E.M.E Ltd Dual head full metal extruder

After single head version, Micron releases the dual head full metal high end extruder.



The main advantages of Micron's dual head extruder are:

• Easy nozzles height calibration: Unclamp the "DFGNM" locking screws, lower the 2 nozzles to the flat printing bed and lock again
• Innovative "all metal" hot end features a detachable filament guide and nozzle module "DFGNM"
• All metal design enables working with polycarbonate at 280- 300 degrees Celsius and with future materials that require higher working temperatures beyond those supported by plastic extruders and hot end.
• Reliable design: enabling strong filament gripping by using high torque 1:13 gear motor and stainless steel 303 hobbed gear with special teeth profile.
• Continuous idler bearing preload adjustment using 2 set screws.
• Easy opening service doors that does not change idler springs preload, while opening and closing the service doors
• Smooth filament feeding design that prevents the filament from being stuck after passing the hobbed gear.
• Tested with PLA, ABS, polycarbonate, nylon and PVA.
• Priced at: 469.95 USD

Technical specifications:

• Electrical:
• Motors: Nema 11 Step Motors.
• Rated current/Phase: 0.67 Amps
• 6.2 VDC :Rated voltage/Phase
• Fans: 40x40x20 size, 12VD 
• Heaters: 12V
• Thermistors: 100K ohm NTC thermistor

• Mechanical:
• Nominal Distance between the 2 nozzles is 46mm but required fine calibration 
• 1:13 Planetary Gearbox
• Materials: black anodize Aluminum, Stainless Steel and Brass.
• Filament size: 1.75mm
• Nozzle size: 0.35mm and 0.5mm
• Total weight:900 gram

Here is the post about single printhead version:

http://diy3dprinting.blogspot.com/2014/01/micron-3dp-high-end-metal-extruder.html

They sell it here:

http://www.ebay.com/itm/DUAL-HEAD-ALL-METAL-3D-PRINTER-EXTRUDER-1-75-FILAMENT-HOT-END-REPRAP-/181295108788

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How to make DIY glow plug heated metal extruder by Adam Kemp and MAKE Projects

Adam Kemp made this low cost extruder project from scratch made from aluminum and automotive glow spark as heat source. You will need to cut some aluminum parts, but the design looks solid.

From project description:

I love 3D printing, so I decided to build my own printer. After playing around with commercial machines like MakerBot’s Cupcake and Thing-O-Matic, it hit me that I could make my own for free, or very near it.

So, off I headed down the long and winding road to design and build a small 3D printer (or as my son likes to call it, the Toy Machine). After a great deal of dumpster diving, I scavenged enough stepper motors, linear rails, and drive belts for the mechanical parts, but I was stumped when it came to the heart of the printer: the extruder. The internet turned up a slew of fancy designs, but all possessed one design flaw: they required 3D printed parts, so you’d need to have a 3D printer to make a 3D printer!

My solution was to build this robust extruder using a handful of tools, one online parts order, and a trip to the auto-parts store. For a heater, it uses a $10 glow plug from a diesel engine, and it performs as well as commercially available extruders.

Thingiverse page:

http://www.thingiverse.com/thing:153464

Detailed making instructions are at:

http://makezine.com/projects/guide-to-3d-printing-2014/glow-plug-3d-printer-extruder/

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Micron 3DP high end metal extruder

Technical specifications:

• Innovative "all metal" hot end features a detachable filament guide and nozzle module "DFGNM"
• All metal design" enables working with polycarbonate at 280- 300 degrees Celsius and with future materials that require higher working temperatures beyond those supported by plastic extruders and hot end.
• Reliable design: enabling strong filament gripping by using high torque 1:13 gear motor and stainless steel 303 hobbed gear with special teeth profile.
• Continuous idler bearing preload adjustment using 2 set screws.
• Easy opening service door that does not change idler springs preload, while opening and closing the service door
• Smooth filament feeding design that prevents the filament from being stuck after passing the hobbed gear.
• Tested with PLA, ABS, polycarbonate, nylon and PVA.

Electrical:

• Motor: Nema 11 Step Motor.
• Rated current/Phase: 0.67 Amps
• 6.2 VDC :Rated voltage/Phase
• Fan: 40x40x20 size, 12VD 
• Heater: 12V
• Thermistor: 100K ohm NTC thermistor

Mechanical:

• 1:13 Planetary Gearbox
• Materials: black anodize Aluminum, Stainless Steel and Brass.
• Filament size: 1.75mm
• Nozzle size: 0.35mm and 0.5mm
• Total weight: 440 gram

Installation:

Manufacturer can provide solid models of the extruder assembly and reference design for mounting plate
Micron 3DP extruder is priced at $289.95

Update:

here is the dual head version:

http://diy3dprinting.blogspot.com/2014/01/micron-eme-ltd-dual-head-full-metal.html

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Pico full metal hot end by B3 Innovations

Design Features:

• Reduced leak/failure points with only one conjunction
• Heavyweight that is lightweight: 29g making it the lightest all-metal universal hot-end
• Compact size – including nozzle: 56mm x 14.3mm dia. making it the smallest footprint of all-metal universal hot-ends
• High strength and durable
• Meltdown-free, long-lasting, plastic-free design
• Built-in 13mm wrench flats
• High-efficiency integrated vertical heater block. Threads inhibit heat transfer in threaded heater blocks
• Precision machined with tolerances meeting aerospace grade
• Precision-machined 45 degree chamfered nozzles for a leak-resistant compression fit
• No Kapton tape
• choice of nozzle size: .35, .4, .5, or .6mm

Heater Features:

• US made heaters replace sub-par imported heater cartridges
• 40 Watts, 12 volts or 24 volts
• High-temperature 25in DuraFlex® leads
• 6.23mm diameter (¼in) (+/- 0.04mm) by 20mm long

Priced at some 99 USD


http://www.kickstarter.com/projects/b3innovations/pico-all-metal-hotend-for-reprap-3d-printers

http://www.b3innovations.com/

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Bulldog open source universal full metal direct drive extruder

The "Bulldog" is open source (CC-BY-NC) universal full metal direct drive extruder suitable for many of DIY 3d printers and compatible with most j-head mount nozzles.
There are two kinds of Bulldog extruder, “Bulldog Lite” to suit 1.75mm filament only and “Bulldog XL” to suit both, 1.75 and 3mm filament. The "Bulldog XL" comes with geared Nema 17 (5:1).

Drawings will be made available, after their Indiegogo campaign ends.





Bulldog extruder features:

• symmetric design (you can mount motor motor left or right side)
• additional 6 mm inner screw thread
• fully assembled and tested
• full metal extruder
• grove mount compatible hotend holder
• stable and precise extruder drive
• direct drive extruder
• HIGH precision gear box NEMA 17 motor (5:1) (Bulldog XL only!)
• integrated fan into the mount for nozzle cooling
• can be used as a classic and bowden extruder drive
• ultra sharp filament pulley
• easy filament change, just pushing the bar with your hands
• 100% compatible with most popular hotends. (J-Head old and new version, Merlin hotend, Magma hotend, Prusa Nozzle)

http://www.reprapdiscount.com/

http://www.indiegogo.com/projects/bulldog-extruder-project

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