Spectra SM 128 Print Head

Spectra SM 128 Print Head


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A total of Spectra SM 128 print head jets comprised of two electrically independent piezoelectric slices each containing 64 addressable channels make up the Spectra SM 128. Configured in a single line, the nozzles are separated by a distance of 0.020. At the top of Spectra SM 128 jetting assembly sits the fluid interface and electrical connection, which offers a variety of flexible mounting options. Such an arrangement allows for particularly tight packing in the print process direction. Fast changeovers are facilitated by flushing from the dual-ported fluid interface, which allows drying fluids to be displaced by inert fluids in times of inactivity.

Spectra SM 128 print head specifications:
Number of addressable jets 128
Nozzle spacing 508 microns [0.020 in.]
Nozzle diameter 50 microns
Calibrated drop size 50 picoliters
Adjustment range for drop size 40 - 55 picoliters
Drop size variation, 1 sigma* 4%
Jet straightness, 1 sigma 3 mrad [0.17]
Nominal drop velocity 8 m/sec
Drop velocity variation, 1 sigma* 5%
Crosstalk, maximum 5%
Operating temperature range up to 90C [194F]
Fluid viscosity range (at jetting temperature) 8 - 20 cP
Compatible jetting fluids Organic solvents, UV curables
Maximum operating frequency 20 kHz

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