convex problem

S

skitertank

Joined
Jun 12, 2009
Messages
154
im having trouble sharpening my bravo 1. now, i dont have a strop yet,what i use is the mouse pad and 2000 grit method. im right handed so when i test shave on my left i cant get it to even catch the hair let alone shave it,and i have tried at all different angles.when i switch to left and test on the right however it shaves effortlessly.same exact thing happens when i do the thumbnail test, and also carving.:confused:

can someone explain whats goin on? anyone else have this problem? i know to put that razor edge i need a strop but right now i just want the edge to be even, catch hair and roughly shave it and like i said only one side is doin that. any advice would be great,thanks guys.
 
Seems odd to me, sorry I couldnt be of more help. I have never had a problem like that
 
it sounds like you have a burr on one side, which is why it would bite one way and not the other.
 
How much pressure are you applying ? The most common issue with sharpening convex tends to be the pressure being applied while stropping. Especially when using a mouse pad, there should be little to no pressure (just the blade weight) against the surface while sharpening. You could also try the sharpie method to ensure you are getting the edge and evenly, by marking the edge with a sharpie before taking it to sandpaper.
 
Yeah thats a burr.
you could use a normal clean lether belt for stroping and removing that burr, do 50 passes on an old belt and see if that doess not help with the burr
 
Maybe your putting a little too much pressure on one side. You hardly need any more pressure than the weight of the knife alone, do this and perform alternate strokes and it should be fine !
 
Your mouse pad is probably too soft or you are pressing too hard. Use the 2000 grit on a piece of harness leather or equal.
 
it could be the pressure, and i didnt think of a burr but that makes since. my method right now to get the angle and what i thought was the right pressure is to rest the grind on the pad and then tilt a degree or two more. i think you guys are right,too much pressure and a burr,possibly too much on one side.i dont know why i didnt think of a burr,i had the same prob with regular bevel grinds and stones and all i ended up needing was a steel and wala,the sharpest edges id ever gotten. i think im gona stop with the mouse pad and paper and just wait to get a strop or else im not gona have any blade left! thank you guys,exactly why i come here.
 
Keep at it with the 2k, if you hold a good angle you can get a razor's edge from 2k. Pressure sounds like another factor because of the size of your burr, again, with good angle control you can have a almost burr free edge from a piece of 2k.
 
Skiter,
Have you tried doing away with the mouse pad? Just use the sandpaper on a flat hard surface and see what happens.
If you're interested I put up some vids a while ago on sharpening.
Here
I think it would help you if you put any thought of angle out of your mind and strop starting flat and move to the edge.
Hope this helps.
Iz
 
I have always thought the Mousepad concept had the potential to be hard for some one who was trying it for the first time. I think your much better off backing the paper with a piece of Vinyl floor mat Or as suggested the piece of heavy leather. If the support is too soft it can curl the burr.
I have a number of leather strops all made from old belts most using a metal polish ( from a car shop)
But in a pinch I have used cardboard with toothpaste.
The trick is to get away from aggressive cutting mediums and useing a high number of reps. Well my opinion anyway.
Carl
 
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