End of cut drop-off

[Bob_z_l]

Hi All,

Recently I'm having a problem where towards the end of the board the cut starts to roll off. 
The further down the job i get the worse it gets as it's compounded by more roll.

I can reset it with a new first cut/straight edge but I'd really like to know what I'm doing wrong.

I'm trying to focus on keeping both rails flat. What am I missing?

 

 

Thanks in advance.  

[trigger_andy]

  On 27/10/2021 at 07:32, Bob_z_l said:

Hi All,

Recently I'm having a problem where towards the end of the board the cut starts to roll off. 
The further down the job i get the worse it gets as it's compounded by more roll.

I can reset it with a new first cut/straight edge but I'd really like to know what I'm doing wrong.

I'm trying to focus on keeping both rails flat. What am I missing?

 

 

Thanks in advance.  

Expand  

Might be uneven chain sharpening. The straight edge when used to remedy this is preventing it happening again. 
 

Have you tried a fresh out of the box chain?

[CDMR]

It can be due to hammering the wedges in too far. It lifts the middle of the slab you are cutting and points the mill down at the end and, as you say compounds with successive slabs.

[Will C]

Assuming your talking about the last couple of inch then: I found that coming out the end of the log at an angle helped With this as it stopped the mill dropping as the first rail fell off the end of the log. 

[trigger_andy]

  On 27/10/2021 at 08:50, Will C said:

Assuming your talking about the last couple of inch then: I found that coming out the end of the log at an angle helped With this as it stopped the mill dropping as the first rail fell off the end of the log. 

That’s what I do as well.

[Bob_z_l]

  On 27/10/2021 at 07:39, trigger_andy said:

Might be uneven chain sharpening. The straight edge when used to remedy this is preventing it happening again. 
 

Have you tried a fresh out of the box chain?

Expand  

Cheers. No I haven't . I will give it a go.

  

I also think @CDMRhas a good point. I might have been  a bit over keen on wedges. They were big slabs and I didn't want the pinch marks from the back of the chain.

 

I'll also try @Will C

[trigger_andy]

  On 27/10/2021 at 08:59, Bob_z_l said:

I also think @CDMRhas a good point. I might have been  a bit over keen on wedges. They were big slabs and I didn't want the pinch marks from the back of the chain.

Expand  

I had to do the very same with my brother yesterday, over keen with the sledge hammer.  But I cant help thinking that you'd get a similar effect with a ladder on the top and still banging the wedges in as you go. Of course the rigidity of the ladder will stop it being as severe, but I think you'd still see it. 

[Will C]

I only knock wedges in with that palm of my hand, just to hold the cut - your not trying to push a tree over

[gobbypunk]

I have always had this when milling on my own the weight of the saw tends to drop the cut for the last few inches try leaning on the inner mill frame I think thats what Rob D said to me but it only happens when milling on my own hope this kinda helps

[trigger_andy]

This is how I normally end a sizeable log.