Making Your PackFeeder Dream a Reality

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Issue #12250 - May 2020 | Page #43
By Ed Serrano

Packfeeders. Bunk Feeders. Call it what you will, but if you’re like most sites, the idea is nothing more than a pipe dream that quickly disappears once you start to ponder where you might put it. To get any real benefit from them, the perception is that the system you need to carry a lot of packs of lumber will take up a monstrous amount of floor space. You’ve probably also heard horror stories of packfeeders currently on the market. And just like that, the dream disappears from mind.

But, there’s a very good reason to keep that dream alive. For any linear saw, the most common cause for downtime is basic – there isn’t lumber on the infeed to cut! That’s it! It isn’t rocket science. Nothing ready to go in? Nothing’s going to come out! Packfeeders are designed to solve this problem by taking out as many of the human elements as possible in the process of feeding a hungry linear saw. The saw tells the packfeeder what it needs, then the packfeeder grabs the necessary lumber and sends it to the saw automatically. Also, a decent packfeeder should allow for automatic stacking of lumber. There shouldn’t be anything left on the infeed side of the saw for the operator to do. Sounds great, but the downside is that, unless you are moving into a new plant, the required floor space is just too much to be feasible – at least traditionally.

Our latest innovation, the Vekta PackFeeder, is truly a clever bit of kit. By loading lumber into the system in only one location, and by storing longer lengths of lumber not side by side but above shorter lengths, Vekta has been able to achieve a footprint that is only about 25% of an equivalent system. Not 25% less but actually 25% OF the equivalent system! That makes a really big difference if you’re wanting something that might fit into your existing factory. What’s more, the unit is capable of picking up two boards at once, can process lumber from 3” up to 12” wide, is designed to have minimal preventative maintenance requirements, and is a fraction of the cost!

So how does it work? Well, packs of lumber are stored on racks which are all loaded from the same location – at the end of the system. As mentioned, longer lengths are stored above the shorter lengths – allowing us to take advantage of the space above. Then a picking system moves up and down among the packs of timber by travelling along the trestles that are used to support the upper row of timber. This pick system scans the racks that are holding the timber and uses this information to work out where each different grade and length of timber is located within the system. As the saw calls for timber, the picker moves up and down to collect boards from the racks and brings them to the front to be passed onto the saw.

By storing boards on top of one another, we immediately gain roughly 50% in floor space. By then loading new packs in from one central location at the back of the system, as opposed to having to leave floor space clear next to each pack of timber, the required floor space drops by a further 50% – making the Vekta PackFeeder take up just 25% of the floor space!

If you only load new packs from the end, what happens when you need to replace a pack at the front or in the middle of the PackFeeder? A great question that’s easily answered. When a pack in the middle of the system is empty and needs to be replaced, the racks it was sitting on are taken out of the system manually. This leaves a gap between the other packs that still have timber. A new pack is loaded onto racks at the end of the system and then this new pack is pushed into the PackFeeder. All subsequent packs slide over until the gap created by the old pack is closed. Then the PackFeeder scans the racks in the system and notes the new position of each rack – it now knows the new location of all of the packs of timber in the system! It’s simple and, as we all know, simple is usually best!

To see the Vekta PackFeeder in action, check out this video and/or visit vektausa.com/packfeeder/.

Ed Serrano

Author: Ed Serrano

Managing Director, Vekta Automation

You're reading an article from the May 2020 issue.

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