resistograph help

[tree79]

Hi

 

I haven't much experience with a resistograph but tried today.

 

Having trouble understanding the results, tried different speeds/feeds. Not sure if it was to slow, seen be large area of blue not green on the graphs?

[David Humphries]

were these taken at different points on the tree?

 

graphs 1 & 3 are the same drill, yes?

 

graph 2 looks to be a completely different volume of wood.

 

 

 

The blue graph shows the penetration rate of the resistance of the needle through the wood & the green graph (usually shown behind the blue, though you can switch that around) shows the torgue of the needle.

 

.

Edited May 30, 2017 by David Humphries

[tree79]

were these taken at different points on the tree?

 

graphs 1 & 3 are the same drill,yes?

 

graph 2 looks to be a completely different volume of wood.

 

 

 

.

 

Hi

Yes there all on the same tree, oak.

There at different locations around the tree, which does a large cavity.

 

I was on speed 3. Yes sorry 1 and 3 are the same, upload twice

 

It may just be the fact there's a lot of decay?

Edited May 30, 2017 by tree79

[David Humphries]

1 & 3 (which present as identical drills) show that there is largely intact functional wood (apart from the dip from 14 cm to 20 cm which may be a pocket of decay)

 

Where as the second drill shows almost no resistance (so decayed wood volume) from about 5 cm inward. A vast difference in the functional outer sapwood areas between the two/three graphs.

 

 

As long as the needle chisel is sharp, setting 3 should be OK for oak.

 

 

 

 

 

 

.

[tree79]

1 & 3 (which present as identical drills) show that there is largely intact functional wood (apart from the dip from 14 cm to 20 cm which may be a pocket of decay)

 

Where as the second drill shows almost no resistance (so decayed wood volume) from about 5 cm inward. A vast difference in the functional outer sapwood areas between the two/three graphs.

 

 

As long as the needle chisel is sharp, setting 3 should be OK for oak.

 

 

 

 

 

 

.

 

OK great thanks dave