Thread: WIP, A New Slabbing Mill

sounds interesting will have to be solidly built to withstand the force of a 7' bar on one rail.

What do Domino's say?

SUPERCALAFRICKINAWESOME

So it won't be something you can throw in the back of the ute huh?It's gotta be heavy,especially the rail setup.I look forward to your ideas.
Cheers,Steve.

Like this but bigger,I'm guessing.

Hmm, 7" on a monorail, sag/blade deflection is really going to be a problem as you wont be tensioning the blade, or will you? I can see the overhead beam being a truss of sorts that overhangs the blade, then perhaps you can brace the other end for tensioning. Your monorail also will have to be very torsionally strong.

I assume a monorail is required for ease of loading the logs. It might be easier for that sized objectives to use twin rails, but make one removeable. Food for thought.

Good luck DJ

Originally Posted by Steve Fryar

Like this but bigger,I'm guessing.

That's the idea but way bigger

Originally Posted by dai sensei

Hmm, 7" on a monorail, sag/blade deflection is really going to be a problem as you wont be tensioning the blade, or will you? I can see the overhead beam being a truss of sorts that overhangs the blade, then perhaps you can brace the other end for tensioning. Your monorail also will have to be very torsionally strong.

I assume a monorail is required for ease of loading the logs. It might be easier for that sized objectives to use twin rails, but make one removeable. Food for thought.

Good luck DJ

Yep bar sag/deflection has been taken into consideration, as I said in my first post, the bar & framing set-up have already been roughly worked out, in fact I have my Lucas bar set-up up under tension and it stays dead flat even with the tension taken off the chain. Have mine set-up so that the bar is under tension full-time and you only need to tension the chain to get the right tension on the chain, not both bar and chain together

Already have some ideas floating around in my head for the monorail set-up, thinking of 2 UB's welded together as a truss frame and using something like girder trolleys for the travelling set-up.

Whatever I do come up with, it will definitely not be a throw in the back of the ute job

Putting my noggin in here to follow things.

This will definitely be worth watching.

A seven-foot horizontal span for a chainsaw bar will be challenging; even worse for a bandsaw mill. On beams for highway bridges, we introduce "camber" (upward pre-curve) to allow for the dead load of the future concrete slab and edge barriers. The bar may also be subject to variable vertical drift influenced by grain alignment at different parts of the log cross-section. And the weight of the slab above the cut should probably be supported by wedges after the cut.

Making the cut vertical instead of horizontal might work better to reduce some of the challenge.

Food for thought.

As a minimum, I suggest you establish reasonable criteria for defining "success" to include generous tolerance on the flatness of the slabs. Most slabs will likely need a trip through a thickness planer or similar device.

Joe

Could you do it with a stationary powerhead with only up and down adjustment, and set up a pair of rails on which a couple of carriages hold the log and can be winched fore and aft to give you your cut?

Completely forgot about this thread.

The slabber has been finished and in operation for quite some time now.

Will take some pics and post some details up in a week or so.

Originally Posted by DJ's Timber

Already have some ideas floating around in my head for the monorail set-up...

So if we see a news story that someone has knocked of with several meters of train track we shouldn't say anything?

This is agoing to be a very interesting one to follow Dj.

(thought I'd posted in here before So c'mon show us the pics).