wood chipper- grade of chippings

[treequip]

No ammount of speed will stop it chucking twigs out, thats down to the anvil gap

[TheTechnobear]

I will sort out the anvil then, and see what i can achieve... simple enough.

 

thanks for the help.

[skyhuck]

Could you make a "screener" or some sort of sieve, to separate out the twiggy bits??

 

Maybe a piece of wire mesh rolled into a drum and rotated while you shovel the chip in, the small chip would fall through leaving much of the twiggy stuff in the mesh drum.

[Ty Korrigan]

That is the problem with gravity feed chippers they don't produce a good chip, they are at braking brash down to ruff chips. To get a uniform chip you have got to have a power feed.

 

Not in my limited experience with a CS100.

It made excellent chips, small and square.

Only willow and birch twigs passed through like straw...

Ty

[openspaceman]

hi,

 

 

a) the output chips, are quite large (1-2cm), and it sometimes throws whole twigs through (i.e. unshredded), though only when small diameter (say 3mm ish)

Ideally, id like to get these down to a smaller size, and with no twigs....

(so chips could be fed into a pellet burner)

 

 

 

I found with any of the pellet burners I dealt with even screened chips jambed in the feed tube. The reason being the auger and feed tube were round and steeply inclined. With an augur in a square tube the larger and longer pieces can ride in the corners. When the auger is horizontal only the bottom of the tube is occupied but as you raise the angle the angular shapes fill the tube and start compacting. The crux will be in the angle of repose of the chips. Make a "sandcastle" of chips in a tumbler and gently raise it above a table, see the angle of repose and compare that with some pellets ( or grain/olive pips).

 

My guess is that an oscillating screen with round graduated holes is likely to sort chips with more cubical shape.

[Stubby]

Sorry didn't see I was the only one who said to slow the feeding down.

 

You weren't I said it 3rd post . I too however did not realize it was a gravity fed chipper !

[TheTechnobear]

thanks catweazel, interesting thoughts and considerations.

actually i meant really a biomass boiler, rather than pellet burner, but your points are still spot on. ive recently been looking at wood chip boilers, and i wondered what the difference was ( v biomass), perhaps they cover the issues you mention.

 

also i still need to improve the grade, unfortunately on the m300, it looks like i need shims to move the blades and anvil (or counterblade as jobeau call it) closer together, so thats my next job