Thompson River Lumber, Thompson Falls, Mt., is updating its 30-year-old Lunden sawmill stacker to improve performance and reliability, and bring it up to today’s standards in a most effective manner to maintain high production.
Updates—slated to be installed in the second quarter of 2022—will include a stick feeder to synchronize feeder timing to the distribution chain, improve feeding of damaged or bent sticks, increase stick feeder cycle, and replace wear parts. Adding a secondary hold-down eliminates double feeds at speeds of over 220 sticks per minute.
The existing stick lift and shuttle movement will be converted to electric servo motor actuation. A new random width pull-back will provide uniform downstream stack face and spreading of random width boards.
Also replaced will be the fork carriage, rake-off assembly, fork lift drive, and overhead course divider and tier stop.