Using a Torque Measuring System
When screw anchoring a torque reading is required to ensure the pile/pier has been screwed in at the
correct specification. Project engineers will generallly demand that a specific torque amount is reached
depending on what the piles or piers are being used for.
Traditionally torque is calculated by a single sensor located at the hydraulic pump (A) in the excavator.
Unfortunately this is not accurate as pressure is lost as oil travels up the boom, through the drive unit
and back again long the boom to the excavator. Pressure readings can be out by as much as 15-20%
compared to actual working pressure.
Digga’s Torque Measuring System comprises of two sensors - The first sensor located on the supply
line at the entry to the drive unit (B). The second sensor is located on the return line where oil leaves the
drive unit (C).
A micro processor calculates the ´actual usable´ pressure using the two sensors, giving a reading
which is up to 12-15% more accurate than that of traditional methods.
The reading is displayed in BAR or PSI (depending on the option chosen at the time of purchase). This
figure is compared to a supplied torque chart to obtain the pressure reading in ft-lbs or Nm. << Go Back