Pathfinder Miniwinch with single conductor cablehead. Borehole logging winch


The Pathfinder winch is our newest generation of small, portable borehole logging winches. It is capable of positioning a geophysical probe or digital camera in a borehole and lowering and raising them to collect a wide variety of geophysical data sets or borehole video. The Pathfinder winch replaces and improves upon our older Miniwinch line. 2.54 mm (1/10 inch) single conductor cable is no longer available, but we can now spool up to 333 m of 3.17 mm (1/8 inch) single conductor cable.

The system is equipped with slip ring and connections through which surface instrumentation can communicate with the probe. A precision measuring wheel and rotary encoder are also included to allow the amount of cable played out to be tracked. The cable is wrapped on the drum in even layers through a manually operated, tiller arm.

The motor is controlled by an 120VAC or 230VAC four-quadrant motor speed controller that allows the speed to remain constant with a varying load and prevents over-driving with heavy loads. The winch is used in conjunction with the current ScoutPro, MSI 360 Digital Camera, or Matrix consoles (or the older Scout logger) with the proper mounting rails, and a portable PC to achieve a complete logging system.

Pathfinder Miniwinch Top view borehole logging

Pathfinder Winch Back View with camera console connectedPathfinder Miniwinch side view right


There are 3 standard ways Mount Sopris can customize a Pathfinder winch based on customer requirements:

For example, here are four models common in the Pathfinder winch line:

  • PF-1-4-3: Spooled with 333m (1092ft) of 3.17mm (1/8in) single conductor cable, 120 VAC, 2CHG cablehead (Gearhart-Owen 4 conductor)
  • PF-2-4-2: Spooled with 233 m (764 ft) of 3.17mm (1/8in) single conductor cable,  230 VAC, 2CHG cablehead (Gearhart-Owen 4 conductor)
  • PF-2-1-3: Spooled with 333m (1092ft) of 3.17mm (1/8in) single conductor cable, 230 VAC, 2CHS cablehead (Mount Sopris single conductor)
  • PF-1-1-2: Spooled with 233 m (764 ft) of 3.17mm (1/8in) single conductor cable, 120 VAC, 2CHS cablehead (Mount Sopris single conductor)

Like the older Miniwinches, the Pathfinder winches are set at the factory to operate at either 120VAC or 230VAC and cannot run at another voltage without first changing wiring. If the winch is configured for 230 VAC, there will be a red label below the POWER IN connector indicating 230 VAC. The ScoutPro or Matrix consoles can automatically switch between 120VAC and 230 VAC. The small aluminum tripod and ship kit are sold separately; this is different from how the Miniwinches were sold.


Motor: 1/20 HP, SCR type
Controller: 4 quadrant, with current limit
Depth Encoder: 128 PPR Optical Quadrature
Logging Speed: 0 to 6 m/min (0 to 20 ft/min)
Load: 18.1 kg (40 lbs.)
Loggable Cable Capacity: 985 ft (300 m) 1/8 inch single conductor
Shipping Weight 333 m cable: 46.3 kg (102 lbs.)
Shipping Weight 233 m cable: 40.8 kg (90 lbs.)
Shipping Weight No cable: 31.7 kg (70 lbs.)
Shipping Case Dimensions: 65.9 x 48.3 x 48.9 cm (24.96 x 19.01 x 19.25 in.)


It is important to prevent kinking or bending the logging cable to not damage the insulated center conductor. The wireline cablehead should be inspected periodically for electrical and mechanical integrity. To prevent loss of tools, we recommend re-heading every three to 6 months or more often as conditions indicate.

NOTE: When using a DC to AC inverter to power the winch, a true sine-wave inverter is required for smooth winch operation. Minimum power requirement for such an inverter is 600 watts, which should also allow operation of the logger.

Pathfinder Miniwinch Side View with Motor controller


Pathfinder User Manual

Brochure Coming Soon!

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