Started by Watch Ryder, February 08, 2016, 08:37:28 PM
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Quote from: OlJarhead on February 12, 2016, 06:33:34 PMMy son works in a sawmill that produces 1,000,000 board feet in a shift!!! Can't put teeth on both sides as the band has to ride on tensioners with lips that keep it from being pushed off them...
Quote from: OlJarhead on February 13, 2016, 01:10:13 PMWow, I wonder how you could incorporate that in a portable band saw...would double production.
Quote from: garyc on February 13, 2016, 12:22:32 PMRick, I was a saw filer for several years. The mill that I worked at had a head rig that used a 54''lower dia blade and a 36'' upper blade. We would saw the log to a 20'' cant. then we would send it over to the re-saw building that used a twin band set up. The bands were 10'' wide X 67' long. You are right, the band saw wheels are ground with a crown on them. The bands are benched out using a roller that stretches the center of the band longer then the edges and the back of the band is longer than the front. This would keep the band from coming off the wheels. The lower picture you're showing is an Armstrong automatic bench that takes out the bumps and ridges. The upper picture is a profiling grinder that sharpens the blade.
Quote from: Don_P on February 13, 2016, 10:24:33 PMToo much moving them out of each others way otherwise you'll be dragging one blade off...unless I'm not seeing it I think it'd be simpler and faster to figure out how to gig back faster... although on a circle mill I can gig back fast enough to throw the carriage and the log out into the road, which ends up being not fast atall.snip.................................................................
Quote from: Don_P on February 14, 2016, 12:13:07 AMAt that point one way to go is to make the sawhead stationary and the cants pass through the saw. They can then pass through in a line, run out the rear, move horizontally, conveyor back to the front, slide in and go through again, a continuous line of cants. The saw is never out of cut. You can see them at some of the log shows. That can all be fabricated using pretty cheap salvage parts.The downside of a circle mill, my blade is starting to blister inside that will be a bad day. But it has run an awful lot of feet an awful lot cheaper than band(s).