Wood processing machine manufacturers have achieved higher precision and productivity with servo control. A 2x4 foot piece of wood is a basic commodity in the construction industry, which is why the leader in the wood processing industry is beginning to use complex automation to gain a competitive advantage in such price-sensitive products.
Create a solution with automation
WaneShear Technologies has created a sawmill that places the bevel on the gauge to produce 2x4, 2x6, 2x8 and larger sheets. The equipment is manufactured by WaneShear, Calif., and is a challenge for processing rough-cut sheets that have been sawn from log wool into a consistently sized product, and the width and length of the roughed sheet are entering. The trimming machine may be very different before. The pressure to maintain a stable profit margin in the volatility of the construction industry will inevitably require companies to continuously increase production, which in turn increases the technical challenges.
Traditional trimming automation equipment uses hydraulic components. The hydraulic system provides the powerful, high-torque output required for the application, but hydraulic fluid leaks often occur. Leaked liquid can damage the board and cause it to be unsaleable. The liquid will also mix with the sawdust to become a viscous substance that will stick to the machine and is difficult to clean.
“We know that if you switch from a hydraulic system to servo automation, the operator can solve many of our problems,†says Ron McGehee, who is chairman and chief equipment designer at WaneShear and holds more than 25 related to sawmills. Invention patent. “In the past, we didn’t pay close attention to servo automation. That’s because we think that the servo system can’t provide the torque strength needed to get the job done, and they are too big to be installed in our existing machine space without redesigning. Inside."
This view has changed in the past few years because the footprint of servo motors has been reduced and new and more powerful servo motors have begun to emerge.
“There is an era when new ways are needed, and we see such opportunities will help us become industry leaders,†McGehee said.
Servo automation for edge trimmer
Servo motion provides an opportunity to increase the accuracy of the WaneShear trimming machine, which will result in more plates available for each log. WaneShear is the first to use the vision system and the variable frequency drive to assemble the raw material sheets for the trimming operation. Gathering sheets is particularly challenging because it does not always require a perfect straight cut for an irregular sheet. There are often six angular variations in the cutting angle. It is common practice to use precise cams that often must change rapidly to compensate for changes in the shape of the edge of the sheet. Since the sheet is graded, better cut quality will mean higher prices.
In a crowded sawmill, the edge trimming machine manufactured by WaneShear must be integrated with other equipment, which presents a series of different challenges for trimming process automation. In a sawmill workshop filled with a variety of other equipment, each trimming machine is custom-fitted to fit within the available space, making it important to reduce the footprint of each machine.
“It’s very important to connect machines in tight spaces,†says McGehee. “If we can use servos instead of gearboxes and hydraulics in the same physical space, we can increase production capacity for our customers without increasing integration issues.†Integration of control systems is equally important, most plants A control architecture centered on a programmable logic controller (PLC) is used for their production equipment. “PLC belongs to the comfort zone of the customer,†McGehee said. “No matter what automation system you add, you have to integrate with the PLC, and the integration process should make trouble for the sawmill workshop staff as little as possible, otherwise they will not buy it. ."
When considering switching to servo control, reliability is a major concern and requirement that users have raised against WaneShear. Sawmills must operate 24 hours a day, 365 days a year to ensure profit. This reliability requirement has made McGehee and other engineering team personnel need a motion control manufacturer that can handle reliable servo motors and engineering support for challenging applications.
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