questions about sharpening

S

SHOKR

Joined
Feb 13, 2013
Messages
33
hey guys
1 i have great trouble resharpening because i have hard time determining and getting back to the right bevel angle (i do sharpening free hand), is there a trick or way to get it right directly without trial and error and ending up with several different bevels on the edge alone? (speaking of course on resharpening using the grinder)

2 my 'manual' sharpener is spyderco's tri angle, same problem goes when using it, because i have trouble determining the angle and its set to use with 40 & 30 degrees

3 i just finished a tanto few days ago, my first double edge, sharpened the main edge fine but trouble came with the swedge.
A its curved upwards, B the belt i used was not even at the sides, so kept 'wobbling' which created more trouble. so after ruining it a bit i decided i will get it as thin as possible then continue on the sharpener.
not only did the sharpener get it more dull than it was (have no idea how or why), while using it this happened
20130326_113621.jpg

the other side is about the same
any thoughts on how to fix this and do a better job sharpening?
my current plan is cover the main bevel with tape, sand this then resharpen with grinder, anything better or advise on techniques?

thanks
 
Not sure how to respond. Are you using stones, belt sander, bench grinder, or all three? Perhaps there is a language barrier. Would need more clear information about what you are doing, and with what. Would be more than happy to help if I understood what you were asking.

Blessings,

Omar
 
lol
ok seems i answered a lot of your questions in my head...

this is a knife i made yes
here: http://www.bladeforums.com/forums/showthread.php/1043511-My-Knives?p=12019950#post12019950

i do the edge bevel (and sometimes resharpening) on my NWG
depending on the edge thickness before sharpening i either start with 220g then 400g then leather strop OR start directly with the 400g

the photo is mainly to show the scratches from using the spyderco sharpner

the way i sharpen is hold the edge upwards (just like grinding) but i reverse the rotation of the belt to go away from the edge. on this blade the swedge was hard to sharpen
i got it really thin and thought i better do the rest on the sharpener so i won't ruin it, but the those scratches happened

i resanded the swedge so it looks ok now

so i am pretty much asking 1 how to sharpen the swedge on the belt grinder, 2 if you guys have explanation why those scratches happened even though i used the same technique of sharpening other knives 3 which is a general question, of how to resharpen a knife on the belt grinder at the exact same angle as before, is there a way of quickly determining it?

thanks

if there is anything else you need me to explain please let me know :)
 
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