Woodchip quality

[BFG]

Can I change anything to my chipper to get less long chip bits as shown in photo? I prefer tiny cubes all over.. 

 

Or is it just the material that goes in being responsible? 

 

[Steve Bullman]

What chipper is it?

[roseyweb]

anvils are going to be the only thing 

[Steve Bullman]

4 minutes ago, roseyweb said:

anvils are going to be the only thing 

Not the only thing.  Some chippers have a speed control for the rollers which can change the size of chips.  That looks like its probably dead wood he's been chucking through though in which case it just comes out like that in splinters sometimes

[arbwork]

agree with above sharp blades, distance from anvil ( and sharp or square anvil will make a difference ) and infeed speed, there are addit features on some e.g. TP can have a slither breaker added to the blade set up to break or prevent this . if you are trying to produce fuel woodchip then  a screened system seems to be the way to go .

 the usual cause of 'kindling wood size slithers is when the last part of the branch/log turns sideways in the infeed system and is chipped along the grain rather than across it, one easy way to prevent this is to chip longer lengths of wood!  

[Mick Dempsey]

6 minutes ago, arbwork said:

 

 the usual cause of 'kindling wood size slithers is when the last part of the branch/log turns sideways in the infeed system and is chipped along the grain rather than across it, one easy way to prevent this is to chip longer lengths of wood!  

Well, I’ve often wondered how that happens. 

 

Every day is a school day!

[Gary Prentice]

26 minutes ago, arbwork said:

agree with above sharp blades, distance from anvil ( and sharp or square anvil will make a difference ) and infeed speed, there are addit features on some e.g. TP can have a slither breaker added to the blade set up to break or prevent this . if you are trying to produce fuel woodchip then  a screened system seems to be the way to go .

 the usual cause of 'kindling wood size slithers is when the last part of the branch/log turns sideways in the infeed system and is chipped along the grain rather than across it, one easy way to prevent this is to chip longer lengths of wood!  

Longer lengths won't prevent it entirely,  just reduce the percentage of slithers in the volume. It also helps a bit to keep the material feed continuous, so the chamber between the feed rollers and flywheel is full - material has no/less room to change alignment. 

[gdh]

Obviously a different area to you but we chip for biomass so we've got the sieve in our heizohack, it does take a bit more power but it makes good chip.

 

Even with that you still get the odd slither when doing small diameter timber though. Speed control changes the chip size slightly but in practical terms most people are going to have it set to the fastest the chipper will take it. 

[PeteB]

Chip quality depends on many factors. Generally speaking, arborist's chippers are, bye and large, made to chip arising's from tree work and make a big pile of brash into a small pile of chips with little regard to chip quality.

 

Biomass chippers turn timber into biomass quality woodchips that are suitable for that industry (with all the variables taken into consideration). But, cost of that machine increases beyond tree workers budgets quickly. This is a generalisation but not the rule.

 

Site clearance units are about that, site clearance! If the bye product is usable then that is a bonus!

 

What machine are you operating? What are the blades like? What are the shear bar or anvils like? What are you chipping and why?