Lost my edge
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31 October 2018 at 6:42 pm #552949
recently, for some dumb reason, I messed with all my planes.
I was not having any issues except sometimes on end grain.
Because of that I checked my bevel angles and in all of my planes I noticed the very tip creeping up well above 30 degrees.
I took them all out and went to work constantly checking my angle. I thought i got them all down to 30 with the heel worked to a nice camber.
But something is wrong.
Ive lost my ability to get super fine adjustment in my set, it jumps from dust to thick shaving quicker than it used to.
im also getting skudding and the planes biting into my wood
I also experimented with the amount of cutting iron exposed so now Im not sure what variable went wrong
did I not truly reach my cutting edge? they felt “sharp” but maybe my stropping was too shallow?
I didnt move any of the frogs. I did move the cap irons closer than normal, but moving one back didnt solve all issues.Tonight I may just lift back up to what was getting me around 35 degrees and the edge and see if the problems go away.
any guesses?
31 October 2018 at 7:13 pm #552951you might be dulling the edge on the strop because you changed your angle of presentation.
are you getting a burr? look at the edge in strong light, can you see a fine line? if so you haven’t taken off the burr or you rounded the edge.
is the iron square on the frog?
it should work from a 16th of an inch showing to a 1/2 mil showing on the blade sometimes you have to stop and start again but when you change the length of exposed iron you change the depth of cut. take a 1/4 turn at a time til it starts to cut
thats some quick things i would check,,31 October 2018 at 8:04 pm #552952After having had the same experiences when using free hand sharpening, I resorted to use a honing guide after which this particular issue with my planing has been gone.
What I think takes place is that the chamfering results in a too rounded bevel, such that the angle at the edge (actually the tangent to the curve the bevel forms) is way too big. The attached drawing tries to show this in an exaggerated manner.
From the back of the blade the edge will be sharp, but due to the big bevel angle that edge either does not make contact with the wood or digs in too deeply, which results in skudding.
/Sven-Olof
Attachments:
You must be logged in to view attached files.Sometimes when you make bigger corrections, you can develop a large burr, which you then don’t really get off. It feels sharp, but after one or two passes, it doesn’t cut or doesn’t cut well. Take your blade out, remove the chip breaker, and feel for a burr without doing anything else. If you feel one, try going to your superfine and working back and forth between the bevel and back. This works the burr back and forth until it finally comes off. If you are fussy about having a mirror finish on the back, you may want to use the strop for the back instead, but I’m not sure how well that will work for a heavy burr. I’ve decided it makes no sense to polish the back beyond the polish on the bevel, so I’ll work the back as needed on the superfine and then polish the back on the strop. It’s not as shiny as other methods but seems to work for me. The single pull that Paul shows doesn’t seem to work for me. I need a few genuine strokes on the back, usually.
1 November 2018 at 1:41 am #552957Didn’t have much time tonight but noticed some things. All of my blades I thought were sharp are not shaving hair or slicing paper well at all. A few quick seconds on fine stone had an iron cutting some hair on my arm. I then noticed my strop is lumpy from cuts in the leather and built up compound. This happened a lot lately when I stropped a bunch of new chisels and cought the leather.
For starters I have made a new strop. It was over a year old anyway
3 November 2018 at 11:05 pm #553010It was my strop. I was charging my strop waaaay yo frequently and still using it even though there were cuts in the leather and random mounds of abrasive. I sort of assumed it all flattens out u see pressure but I guess that only works to a point. Eventually it began rounding my edges. New strop, light charge, um slicing end grain ribbons again
4 November 2018 at 3:38 pm #553026Thanks, I began to do that, but having extra leather scraps laying around I decided to just make a new one.
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