Bloody Mitres!!

[moz]

I wouldn't fuss too much trying to establish what that secondary bevel is. You really need to re-establish the main bevel. The further away you get from the main bevel just means more hard work to get it back - unless you have reason to change the angle. What are going to do? Keep dropping it a degree or two every other re-sharpening until the edge is at 90deg? I'd lend you the use of my Tormek but it's a bit far. Course diamond stone with a jig will do but it's miserable work if there's nothing funny on the radio. I'll double Jake's offer and save you the trouble.

John

 

[Anonymous]

Wizer

Make the shooting board I posted recently - it is easy to tune to absolute accuracy on mitres.

PM me if you want more detials on how to make it and tune it

 

[Jake]

Sounds to me like some more instant anti-discouragement is needed than having to go through building a fancy (but very nice) shooting board.

Why don't you try the shimming thing, Wizer. If the plane is working OK, it's the angle of the fence. That's easily adjusted (effectively) by adding and subtracting shims until the damn thing squares up, and its easy enough to tell whether you need to add more or take some away.

 

[Oryxdesign]

Tom, are you sure your plane is sharp enough?

 

[Karl]

Tom - if it is the angle of the mitres, then i'd tune up your shooting board - or build a new one b4 you get rid of the SS.

 

[Mr Ed]

Maybe your house is on a leyline Tom :lol:

Cheers, Ed (not helping much I know...)

 

[Woodmagnet]

Think you have problems Tom, even my memory
foam slippers have got Alzheimer's.

 

[Chris Knight]

Tom,
It's no big deal if your shooting board is slightly off - just pack out one end of the workpiece with a Post-It™ note or two. (you'll need to figure out which end )

 

[wizer]

Thanks guys. I was getting shavings with the No.9 but it could probably do with a proper sharpen. I don't yet have a grinder to regain the primary bevel so I'll have a go by hand.

After I logged off last night I decided to try shims, so it's reassuring to see the advice here this morning.

I will have another go at building a shooting board if I get time today. This is the last day I will have the Jet TS

In short, I'm not sulking so much this morning

 

[bugbear]

grr

Thought I'd make a nice quick picture frame for missus-to-be today. Machined up some lovely Ash. Routed in the recess. Then comes the mitres :evil: Seeing as the Jet is all ready to be picked up, I decided to use the SCMS, it's a good saw but not perfect. So I then went on to the shooting board. But I'm really struggling with either technique or construction. I can shoot full length shavings but not consistently. I stuck at it for about an hour but the 4 pieces did not make a rectangle. I have been checking with a 45 engineers square and I'm close.

I would suggest carefully planing up some scrap, shooting two mitres, and checking the PAIR with a square.

Mess around with shims (paper, card or veneer depending on error) until you're hitting 90.

THEN worry about the matching length on paired sides issue - how are you measuring your sides, since measuring mitred pieces is tricky?

I will admit to a self-bodged version of this in my workshop:

http://www.leevalley.com/wood/page.aspx ... 2936,50298

(sorry Rob)

BugBear

 

[Oryxdesign]

That's a good point, it's worth checking to see if your mitres are all out consistently by the same amount. If they are it's the jig, if there not it's something else.
If you want some new components for another jig drop down with the materials some time and I'll run them through the saw.
Simon

 

[wizer]

That might be an idea actually Simon as the Jet goes tomorrow.

I haven't really got as far as checking for length or even square yet as the mitres are off when I measure them with my 45 engineers square.

I'm just off to the workshop. Be back in 5 mins when I have slung wood about the workshop and dropped a few toys on the way!

 

[ByronBlack]

Tom - I'm a bit late to the party on this one, but I used to really struggle with mitres until I made a shooting-board. Since then I have made two boxes, both came out perfect, and I also made a mitre-frame and panel top for an arts and crafts table (the one that was in british woodworking). That was done mostly by hand and then tuned on the shooting-board using a sharp block plane, it's very easy to tune - using pieces of card/paper behind the angle block on the shooting board you can get it super accurate. Stick with it (the shooting board) it's definitely the way forward.

 

[gidon]

Wizer
I make lots of picture frames and the only way is, as has been said to use a mitre board. If the wood isn't too thick, I double stick tape the equal lengths together back to back and shoot both pieces at the same time. It also means you can cut the mitres very roughly if you like - I've used the bandsaw before for smaller pieces.
The shooting board DOES not have to be anything fancy - I have about the most basic one you can imagine and it works fine. It does help if the blade is very sharp and as soon as it leaves any grooves resharpen it. Especially with your plane (you lucky devil) it should be effortless.
Clamping it is another matter ...
Cheers
Gidon

 

[wizer]

ok so I had a go. I'm really not sure what the problem is. The plane takes nice shavings off the far end of the mitre (as I'm shooting) but doesn't touch the back. So that would tell me I have to keep shooting til the back starts to shave? But it doesn't? I keep shooting and it just seems to shave the same bit or not shave at all. Surely shimming it out to make it cut the back of the mitre isn't the solution? One obvious problem is that there is some wobble when I push. But this wouldn't cause the problems I am having. That'll come later when I find they're out of square. So I'm not sure if it's technique or the board or both.

As I said above, I can't really make another board today. The Jet is nicely cleaned and dismantled ready to go tomorrow afternoon. So looks like I'm finally going to have to give up on the idea of giving the finance a handmade wedding present and go and buy something! :roll:

Thanks for your patience guys. I will pick this back up after the chaos of the wedding (next weekend).

 

[Oryxdesign]

ok so I had a go. I'm really not sure what the problem is. The plane takes nice shavings off the far end of the mitre (as I'm shooting) but doesn't touch the back. So that would tell me I have to keep shooting til the back starts to shave? But it doesn't? I keep shooting and it just seems to shave the same bit or not shave at all. Surely shimming it out to make it cut the back of the mitre isn't the solution? One obvious problem is that there is some wobble when I push. But this wouldn't cause the problems I am having. That'll come later when I find they're out of square. So I'm not sure if it's technique or the board or both.

As I said above, I can't really make another board today. The Jet is nicely cleaned and dismantled ready to go tomorrow afternoon. So looks like I'm finally going to have to give up on the idea of giving the finance a handmade wedding present and go and buy something! :roll:

Thanks for your patience guys. I will pick this back up after the chaos of the wedding (next weekend).

Slip of the finger?

 

[wizer]

Sorry Simon? What do you mean?

EDIT: I see. No not a slip of the finger. The spell check is on MY side

 

[Oryxdesign]

Is she your Finance?

 

[wizer]

in many way yes.

Just noticed your website Simon, is that new? Did you do it yourself? Looks good

 

[Oryxdesign]

It's hosted on my .mac account, designed by a mate and maintained by my ex fiancee who is now my wife and personal financial advisor. I took some of the photos but not all and I will have to change it next week as I'm moving my 'shop.
Glad you like ithe website, thanks for the feedback.
You could come down next week and I'll cut your mitres on the saw, I'll keep it a secret and no one will know. :wink: