本文参数表介绍的是理光MH5220（文中称G5s），不能直接作为所有G5喷头的规格。原厂资料说明其为1280喷嘴、600dpi原生分辨率，墨滴范围2.5–9pl；实际灰阶与喷射表现还取决于墨水和驱动条件。
本文主要介绍理光MH5220（G5s）喷头，并保留原文的喷头清洁视频与技术参数资料。
MH5220喷头功能概览
一、在4 x 320喷嘴中配置了1,280个喷嘴，打印头实现了高分辨率，没有墨点的颗粒状外观，并且能够以多个打印头交错配置打印1,200 dpi分辨率。
二、多墨滴功能可以创建从2.5到9pl的各种墨滴尺寸。（请注意，采用多墨滴技术，墨滴快速连续喷射，然后在到达介质表面之前在飞行中合并）。
三、不锈钢结构，耐用，使用寿命长。
四、内置加热器，能够喷射高粘度油墨。
五、兼容UV耐用墨水，用于标签打印。
理光G5s喷头内部：
理光G5喷头的八大优点和使用要求说明
以下保留原文所附的清洁视频，教你如何清洗理光G5喷头、理光G5S喷头，着重讲解喷头清洗过程中的一些要点和注意事项，希望对大家有所帮助。
原文英文技术说明
Characteristics
Drop size of 2.5pl and Single-pass 600dpi
high-resolution printing and support for multiple ink colors
2.5pl drop size allows excellent print quality without graininess.With 1,280 nozzles configured in 4 x 150dpi rows, this head achieves high-resolution 600dpi printing. Additionally, the ink paths are isolated, enabling a single head to jet up to two ink colors.
Support for grey-scale
Achieves excellent gray-scale rendering at up to 4 levels.
*Although controls for up to 4 scales are provided, actual jetting depends on ink characteristics.
Excellent durability
and extended service life
Ricoh inkjet print heads are made of stainless steel. These heads are highly robust and offer excellent anti-corrosion properties for multiple inks, resulting in excellent durability and extended service life.
Support for different inks
With its built-in heater, these heads are capable of jetting high-viscosity inks. Additionally, the ink path is isolated from the actuator (piezo elements) , i.e. no ink contact.
Variable drop volume capability
Ricoh’s open waveform policy allows tailored multi-drop printing of between 2.5 – 9pl, enabling high quality grayscale printing.
Specifications / External dimensions
MH5220
MH5220
Method Piston pusher with metallic diaphragm plate
Print Width 54.1 mm(2.1″)
Number of nozzles 1,280 (4 × 320 channels), staggered
Nozzle spacing (4 color printing) 1/150″(0.1693 mm)
Nozzle spacing (Row to row distance) 0.93 mm
Nozzle spacing (Upper and lower swath distance) 9.31mm
Compatible ink UV
Total printhead dimensions 89(W) × 64.2(D) × 24.7(H) mm (3.5″ × 2.5″ × 1.0″) excluding cables & connectors
Weight 147g
Max.number of color inks 2 colors
Operating temperature range Up to 60℃
Temperature control Integrated heater and thermistor
Life 100 billion actuations per nozzle
Jetting frequency 30kHz
Drop volume Binary mode: 2.5pl / Grey-scale mode : 2.5-9pl *depending on the ink
Viscosity range 10-12 mPa•s
Surface tension 28-35mN/m
Grey-scale 4 levels
Ink port Yes
Number of ink ports 2 × dual ports
Alignment pin direction Front (standard)
Alignment pin direction Front (standard)
Separately sold parts FPC cable with connectors
*Results obtained from continuous jetting test using standard Ricoh test ink.
Nozzle
– Product appearance and specifications may be changed without prior notice for improvement purposes.
型号和规格来源：理光MH5220原厂数据表。原文英文参数为发布时资料；采购与维护应核对对应版本及设备厂商说明。
设备选型还可参阅UV喷码机打印头选择。
