Positioning & Motion
SS250 mkIII Heavy Duty Pan & Tilt
High-torque anodized 6061-t6 aluminum positioner for heavy subsea camera and sensor payloads.
Hardware model · Reference POS-SI-SS250
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System overview
The SS250 mkIII is a two-axis positioner with reversible synchronous motors and precision strain-wave gearing. The August 2025 family specification provides a 65 ft·lbf output torque and 150 lb payload rating. The housing and compensation configuration are selected for the deployment; the mkIII platform is kept separate from the TrueAxis absolute-encoder version.
Applications
- Heavy camera payloads
- Subsea sensor positioning
- Deepwater inspection
Key features
- 65 ft·lbf / 88 Nm maximum output torque per axis.
- 150 lb / 68 kg maximum payload.
- Analog or serial control with position feedback.
- Internal and external compensation configurations.
Technical details
Electrical and motion
- Supply
- 20–30 VDC.
- Maximum drive current
- 300 mA–2.2 A serial DC, speed dependent at nominal torque; 2.0 A analog DC.
- Maximum static current
- 300 mA–1.2 A serial DC, selectable at nominal torque; 1.0 A analog DC.
- Torque
- 65 ft·lbf / 88 Nm per axis.
- Maximum payload
- 150 lb / 68 kg.
- Angular speed
- 0.5–20°/s.
- Position feedback
- 12-bit, approximately 0.1°.
- Backlash
- <3 arcminutes, approximately 0.05°.
- Gearing
- Precision strain-wave gearing.
- Optional limits
- Pan ±175°, tilt ±90°.
Mechanical and environmental
- Housing
- Anodized 6061-T6 aluminum
- Dimensions
- Source lists 292 × 246 × 137 mm and 11.5 × 9.7 × 5.1 in. The third dimension is not an equivalent conversion; request approved mounting drawing.
- Weight in air
- 10.4 kg
- Weight in water
- 6.1 kg
- Operating depth
- 3000 m with standard internal compensation; 6000 m with external compensation.
- Operating temperature
- −20 to +50°C.
- Storage temperature
- −30 to +60°C.
- O-rings
- Buna-N, Viton or other material selected for the fluid environment.
- Fasteners
- 316 stainless steel.
- Compensator
- Internal diaphragm.
Control and integration
- Serial control
- RS485 or RS232.
- Control software
- Laptop/PC with SIDUS Control Panel GUI, or a host implementing SIDUS serial commands.
- Analog control
- Analog control with feedback; factory configuration.
- Optional controls
- Pelco-D integration, keyboard/mouse/joystick control and digital feedback are listed as options.
- Connector
- Customer selectable; Subconn standard.
- Connector wiring
- Follow the connector diagram matching the ordered electrical interface; pin assignments are configuration-dependent.
Configuration options
Power and drive interfaceFactory configuration
Select the documented supply and analog or serial interface. Analog, AC and DC options have different current and torque ratings.
Mounting and motion limitsIntegration option
Agree mounting, payload centre of gravity, cable routing and required hard stops. Continuous rotation does not imply unlimited cable rotation.
CompensationDepth configuration
Internal compensation supports the stated standard depth. External compensation is a separate configuration; confirm fill fluid and all connected equipment.
Compatibility and naming
Printed inch/mm dimensions disagree; confirm mounting drawing. Older individual pages/sheets contain different speed, torque/current and mass values. No public current operating manual found.
Datasheets & documentation
SS250 / SS251 / SS252 — Heavy duty pan and tilt — specification
Applies to the named models and revision only. Housing, interface and performance differences must follow the individual model tables. Source discrepancies are recorded on the ROVITEC product pages; request the approved specification before integration.
Software compatibility and support
SIDUS control software and integration support
Request the control package and protocol documentation matching the ordered model, interface and hardware revision.
Product advice
Let’s discuss your requirements
Tell us about your application, operating conditions and preferred configuration.
These links open your email app. Send the email to submit your enquiry; demonstration dates and configuration are confirmed by ROVITEC.
roy@rovitec.no