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Skiving machine - sharpening

Hi there - I marked the Edge off the knife - with a pen - however - it’s not coming off - when grinding - so I assume no contact between the knife and grinding wheel - how do I fix this? appreciate any help

thanks for help

14 comments

14 Comments

Edward

Mar 12, 2023

Did you solve the problem?

samdiarmaid

Mar 12, 2023

Replying to

Hi Edward,

Thanks for your your reply - sort of, lol, it just takes some trial and error, with adjusting the angle of the stone. just comes with practice. Are you currently having a similar problem?

Edward

Apr 20, 2023

Replying to

Many times we think a two-minute touch-up grind is sharpening the edge when it is not. Periodically, we need to do a 10-minute grind to mate the stone properly with the knife edge.

I now periodically mark only the tip of the knife edge so I can see immediately if the stone is sharpening the edge. If I see no ink removal, I know to do a longer grind.

michaels02130

Jan 31, 2023

Looking at your last picture, it looks like the knife is far away from the presser foot? There should only be a small gap of .2mm to .5mm.

Leathercraft Masterclass

Dec 30, 2022

You're going to need to remove the feed roller assembly, put on some cut resistant gloves, pull out your skiving machine's power cable, reach inside and adjust the angle of the grinding wheel.

Depending on your machine, you may notice there are grub screws (or set screws in the US) to loosen and adjust the pitch or angle of your wheel until it makes full contact with the bell knife.

Do not continue to grind at the current angle.

Leathercraft Masterclass

Dec 30, 2022

Replying to

Do I have to just keep playing with the angle of the stone. Yes that's right.

from my angle it looks like the stone is making full contact with the knife.

It's not making full contact.

is this because I’ve changed the shape of the blade? No it's because the grinding wheel needs adjustment.

samdiarmaid

Dec 30, 2022

Replying to

Hi Phil,

think I got there in the end. Last thing, I’ve skived - 2 pieces of leather - same angle and all - one has skived perfectly - the other jaggered - also - seemed to be eaten under the knife - Is this due to needing the knife to be sharpened again?

samdiarmaid

Dec 30, 2022

Replying to

For example like this -

samdiarmaid

Dec 30, 2022

It seems to be only sharpening the top off the blade - but not the actual blade - at the bottom -

grantkang5

Dec 29, 2022

Make sure you engage the clutch by pulling out the lever on the right side of the machine. Use the left knob from the center (there's usually 2 big knobs paired close to each other) to bring the grinding stone closer to the blade. Engage the rotor, the blade should be grinding against the stone and you should see sparks coming off it.