NARISHIGE DM-OH-2 Compact Digital Micromanipulator Controller

Overview

The NARISHIGE DM-OH-2 is a purpose-built compact controller engineered to interface seamlessly with NARISHIGE’s DM-series digital micromanipulators—precision motion systems widely deployed in electrophysiology, patch-clamp recording, microinjection, and intracellular manipulation workflows. Unlike generic motor controllers, the DM-OH-2 implements proprietary firmware architecture optimized for low-latency command execution and real-time positional feedback synchronization with DM-series manipulators. Its operation is grounded in closed-loop stepper motor control, enabling repeatable sub-micron positioning accuracy when paired with compatible DM actuators (e.g., DM-151, DM-152). Designed for integration into space-constrained rig configurations—including upright and inverted microscope stages—the unit operates without external power adapters, drawing regulated voltage directly from the host manipulator via the included 2 m shielded cable. The absence of mechanical dials or rotary encoders reflects a deliberate shift toward touch-actuated digital interaction, minimizing haptic noise and reducing contamination risk in sterile or laminar-flow environments.

Key Features

• Integrated 3.5-inch resistive touchscreen with high-contrast graphical UI for intuitive parameter selection and status monitoring
• Dedicated physical function buttons for immediate toggling between coarse/fine movement modes and zero-point reinitialization—engineered for gloved-hand operation
• Zero-point calibration routine compliant with NARISHIGE’s internal positional reference protocol, ensuring traceable coordinate alignment across multi-axis DM systems
• Compact form factor (45 × 86 × 35 mm) and lightweight construction (130 g) enable mounting on microscope frames, vibration isolation tables, or custom optical breadboards without structural compromise
• EMI-shielded housing and twisted-pair signal routing within the 2 m cable minimize electromagnetic interference during sensitive voltage-clamp recordings
• Firmware supports bidirectional communication with DM-series manipulators via proprietary serial protocol, enabling firmware updates and diagnostic logging through host PC software

Sample Compatibility & Compliance

The DM-OH-2 is exclusively validated for use with NARISHIGE DM-series digital micromanipulators and is not interoperable with third-party motion stages or legacy analog manipulators. It complies with IEC 61326-1:2013 for electrical equipment used in measurement, control, and laboratory applications, including immunity to electrostatic discharge (±8 kV contact), radiated RF fields (10 V/m, 80 MHz–2.7 GHz), and fast transient bursts (2 kV). While not classified as a medical device under FDA 21 CFR Part 820, its design adheres to GLP-relevant principles for instrument traceability: all zero-point calibration events are timestamped and stored in non-volatile memory, supporting audit-ready documentation for preclinical research labs operating under ISO/IEC 17025 or AAALAC-accredited protocols.

Software & Data Management

The controller operates autonomously but interfaces with NARISHIGE’s optional PC-based “DM Control Suite” (v3.2+) via USB-to-serial bridge. This software enables advanced configuration—including velocity profiling, step-size mapping, and macro scripting for repetitive positioning sequences—and logs all user-initiated zero-point resets with UTC timestamps, operator ID fields, and manipulator serial number binding. Audit trails generated by the suite conform to ALCOA+ principles (Attributable, Legible, Contemporaneous, Original, Accurate, Complete, Consistent, Enduring, Available) and support export in CSV and XML formats for integration into LIMS or ELN platforms. No cloud connectivity or remote access functionality is implemented; data residency remains strictly local per institutional IT security policies.

Applications

• Electrophysiology rigs requiring rapid, reproducible electrode positioning during whole-cell patch-clamp experiments
• Single-cell microinjection setups where tactile-free zeroing minimizes stage drift during pipette approach
• Confocal and two-photon imaging systems integrating micromanipulation for targeted subcellular intervention
• Developmental biology studies involving embryo microsurgery or blastomere isolation under stereomicroscopy
• Neuroscience laboratories standardizing manipulator calibration across multiple rig installations for inter-lab reproducibility studies

FAQ

Is the DM-OH-2 compatible with non-NARISHIGE micromanipulators?
No. It is hardware- and protocol-locked to NARISHIGE DM-series digital manipulators and lacks universal motor driver interfaces.
Does the controller require an external power supply?
No. It derives regulated 5 V DC power directly from the connected DM-series manipulator via the supplied 2 m cable.
Can zero-point calibration data be exported or backed up?
Zero-point timestamps and session metadata are retained internally but are only exportable when using the DM Control Suite software on a connected PC.
What is the operational temperature range?
The unit is rated for continuous operation between 15 °C and 35 °C at relative humidity ≤70% non-condensing, consistent with standard laboratory environmental specifications.
Is firmware update capability available in the field?
Yes—updates are delivered via the DM Control Suite and require a USB-connected host PC; no bootloader access or manual hex programming is supported.