Precision Geometric Log Rotation (PGLR) is a real-time rotation verification and correction system that ensures you get the best turn on every log, significantly improving cutting accuracy and increasing uplift and recovery. The PGLR uses the log rotation solution and a lineal scan zone placed upstream or downstream of the turning rolls to actively monitor and correct the precise degree of turn during and after actuation. PGLR works on Dual or Quad roll log turners, Ring-Type Turners and Sharp Chain log turners, providing a fully automated precision log turning system.

Best Turn On Every Log

PGLR system simultaneously verifies the accuracy of your autorotation system and automatically makes any necessary correction turns, ensuring you get the best turn on every log.

Adds Profit to Your Bottom Line

This simple solution to an often hidden problem adds profit to your bottom line in the form of higher recovery and increased production of more boards, longer boards and more wane-free boards, all with no extra mechanical hardware.

Applications for PGLR System

⦁ PGLR works on Dual or Quad roll log turners, Ring-Type Turners and Knuckle turners.
⦁ Enables you to convert a manual system to a semi-automatic system.
⦁ Enables you to convert a semi-automatic system to a fully automated precision log turning system.

Improves and Corrects Log Turning

⦁ Significantly improves your cutting accuracy.
⦁ Increases uplift and recovery.
⦁ Allows you to cut more boards, longer boards and more wane-free boards. Consider that a mis-turn of as little as 2 degrees could wipe out an entire board in a small log.

Standard Scan Zone

⦁ The system uses the same standard scan zone that the WoodExpert Log Turner Optimizer uses, placed upstream or downstream of the turning rolls to actively monitor and correct the turn during and after the turn.

Step 1: Initial scan of log

⦁ All cross sections of the log are collected as usual by the Turner scan zone. They are passed to the PGLR computer to be the reference to compare against scans at the PGLR scan zone.

Step 2: PGLR scanning a correction

⦁ As cross sections are collected at the PGLR scan zone they are compared to the corresponding cross section from the original Turner scan.
⦁ The difference in rotation is calculated. During the turn, the difference in rotation will be used to project turn error and correct the current turn roll motion set.
⦁ After the turn, the system continues to monitor turn accuracy and correct if necessary.

Step 3: Optional turn detector

⦁ For systems that have an existing scan zone on the log infeed or are planning to install one, the Turn Detector can provide continuous verification of the turn accuracy using the same technology used at the PGLR scanner.
⦁ This system has the luxury of examining multiple cross sections to accurately guage the final turn angle with better accuracy than can be hand measured, thus eliminating the need to run time consuming manual tests in order to confirm the turner operation.