BIQU 42 Nema 17 Stepper Motor 34mm Height for CNC X / Y / Z axis For 3D Printer Electronic Parts

Specification:
Step angle accuracy: + – 5%(full step,not load)
Resistance accuracy: + – 10%
Inductance accuracy: + – 20%
Temperature rise: 80deg Max(rated current,2 phase on)
Ambient temperature ———–20deg ~+50deg
Insulation resistance:100MΩ Min,500VDC
Insultion Strength——–500VAC for one minute
Step Angle (deg):1.8A
Motor Length(mm): 33MM
Rated Current (A): 1.33A
Phase Resistance (Ohm) :2.1Ω
Phase Inductance(mH) :2.5mh
Detent Torque (N.cm) : 19mm
Voltage:2.8V
Shaft length mm: 19mm

Package List:
1x Stepper Motor
1xUSB Cable

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EAONE 3D Printer Parts Accessory Hot End Assembled Extruder Kits 1.75mm Filament Direct Feed 12V 0.4mm Nozzle (Bonus: 2 pcs Extruder Tube & 2 pcs Brass Nozzle)


EAONE Assembled Extruder Kits Hot End for 3D Printer 1.75mm Filament Direct Feed 12V Extruder 0.4mm Nozzle

Specification of Assembled Extruder Kits:

Type: Assembled Extruder Kits
The kits include: 1 pc Aluminum Heater Block, 1 pc 1.75MM Tube and 1 pc 0.4MM Brass Extruder Nozzle
Pre-wired thermistor to the updated heater block
Input Diameter: 1.75mm
Output diameter: 0.4mm
Voltage: 12V

Specification of Extruder Tube:

Type: Nozzle Throat
Compatibility: 3D Printer
Outer Thread: M6
Nozzle Throat Outer Diameter: 7mm
Nozzle Throat Inner Diameter: 4mm
Teflon Pipe Inner Diameter: 2mm
Length: 30mm
Filament Diameter: 1.75mm
Material: Stainless Steel

Specification of Brass Nozzle:

Type: 0.4mm Extruder Brass Nozzle Print Head
Color: Golden
Material: brass
Size: 5*13mm
Input Diameter: 1.75mm
Output Diameter: 0.4mm

Attention: Small parts, keep away from children

package including:

1 x Assembled Extruder Kits
2 x 3D Printer Nozzle Inputting Tube
2 x 3D Printer Extruder Brass Nozzle Print Head

Product Features

  • Set of 5: 1 pc Assembled Extruder Kits, 2 pcs 30MM Length Extruder 1.75MM Tube, 2 pcs 0.4MM Brass Extruder Nozzle
  • Compatible with all 1.75mm PLA ABS printer
  • Input diameter: 1.75mm; Output diameter: 0.4mm; Voltage: 12V
  • Installation: external M6 thread connection
  • Plenty of MK8 clone nozzles compatible with this hotend – nozzle replacement is easy

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Chemical ghost signatures protect DED 3D printed parts from counterfeitting

IP protection is one concern that could stilt the growth of additive manufacturing for sensitive applications in high value industries such as aerospace, automotive and defence.

Protection methods under investigation include embedding quantum dot signatures, microstructural manipulation and advanced encryption of the digital design files.

The solution proposed by Dr. Sharon Flank et al. from InfraTrac, is to add spectral signatures to the 3D printed parts that can only be read via x-ray. This technique is more cost effective than some of the other methods in experimentation as it can be conducted using off-the-shelf devices.

The latest research into the method has been conducted in collaboration with the Penn State’s Center for Innovative Materials Processing (CIMP) and results have been published in the 3D Printing and Additive Manufacturing journal.

Leaving metallic fingerprints

The most effective 3D printing method for chemical tagging of parts is directed energy deposition (DED) as it allows the use of multiple metals. In InfraTrac’s study, an Optomec M7 LENS system is used to 3D print titanium alloy samples. Chemical taggants are added to the parts at different depths, and scanned using x-ray fluorescence (XRF) spectroscopy analysis in lab conditions.

(a) Illustration of layers in a smaple without taggant. (b) center and (c) off center placing of the chemical taggant. Image via 3D Printing and Additive Manufacturing journal.(a) Illustration of layers in a smaple without taggant. (b) center and (c) off center placing of the chemical taggant. Image via 3D Printing and Additive Manufacturing journal.DED 3D printed titanium samples with varying taggant depths used in the InfraTrac study. Photo via 3D Printing and Additive Manufacturing journal.DED 3D printed titanium samples with varying taggant depths used in the InfraTrac study. Photo via 3D Printing and Additive Manufacturing journal.

An advanced game of Battleship

Results show that taggants on the surface of parts, though invisible to the naked eye, can easily be detected by XRF. 250 μm deep into the titanium sample however, the taggant becomes harder to differentiate.

Varying stages of taggant presence. Using (a) as a reference point with less taggant content, (b) and (c) clearly show the chemical presence. Image via 3D Printing and Additive Manufacturing journal.Varying stages of taggant presence. Using (a) as a reference point with less taggant content, (b) and (c) clearly show the chemical presence. Image via 3D Printing and Additive Manufacturing journal.

A number of possible improvements are identified by the team to enhance the “smearing” effect in titanium, as a soft metal, that may cause poor clarity. As an example, Flank et al. suggest that “machining/grinding with sufficient lubrication or the use of an etchant, can reduce the effect of smearing.”

The researchers state that “These results are encouraging.”

“Preliminary results suggest hat not only can a taggant mix be detected but also can be hidden in a specific predetermined position, as in a game of Battleship.”

“Moreover, it can be quantitated as well so that a counterfeiter attempting to replicate the fingerprint would have to know about it, find exactly which spot it is in, and replicate its depth and composition correctly, along with matching the composition of
the matrix materials.”

For more research updates, follow 3D Printing Industry on Twitterlike us on Facebook and subscribe to our free newsletter. You can also register your interest for 3D printing jobs here.

Featured image shows DED in Optomec’s LENS technology as used in the InfraTrac study. Screengrab via Optmec on YouTube

Witbot Double V Slot stainless steel Passive Round wheel with Bearings Idler Pulley Gear Perlin Wheel 3D Printer parts ( Pack of 5pcs)

Specification::
Inner Diameter: 5mm
Outer Diameter: 24.39mm
Height: 10.23mm
Net Weight: 25g/pcs
Color: Silver

Package content:
5*Wheels with Bearing

Product Features

  • Test one by one, high quality
  • Inner Diameter: 5mm
  • Outer Diameter: 24.39mm
  • Height: 10.23mm
  • Durable and flexible

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RONGT Aluminum Alloy Version Bowden Extruder 3D Printers Parts Reprap Full Metal For Makerbot MK8 1.75mm Filament (Right)

Product Features

  • Alias: Extruder
  • Applicable machinery: 3D printer
  • Model: MK8
  • Specifications: right, left

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