Bell skiver messing my pieces

[vhusi]

Good day,

I have a fortuna bell skiver and its messing my pieces at the end of the skiving process. I have watched hours of YouTube videos of setting the gaps between the bell knive and the presser foot, and between the roller stone and the knive, ( set them at 0.4mm) using a stock card but cant seem to get it right. What might i be overlooking or missing?

Edited Monday at 10:09 PM by Northmount
Fixed title

[Tigweldor]

Bell knife not sharp enough due to burr left on the inside after using the built in sharpening wheel.

When the leather is still thick enough, you will not notice it other than the grooves perpendicular to the feed direction - but when it gets real thin, the burr will grab it and make a mess.

Also take a very close look at the stone.

It has pores that tend to clog up and leather builds up on that - thus changing foot pressure when the lump is directly under the leather.

Dry ice blasting is a very good way to "resurface" the stones by cleaning the pores.

With the  "grabby" again stone, you can then use less foot pressure.

Greetings

Hans

Edited Saturday at 08:08 PM by Tigweldor

[Tigweldor]

should naturally read : you will notice it FROM the grooves perpendicular to feed direction.

Is there a time limit on editing - if yes - WHY ?

[Northmount]

2 hours ago, Tigweldor said:

Is there a time limit on editing - if yes - WHY ?

Yes, about 2 hours, to protect the integrity of the forum.

[Tigweldor]

Roger - I´ll keep that in mind.

Now with English not being my mother tongue - I just hate to read written a while later and see my text as if written by an illiterate dork.

Greetings

Hans

[toxo]

17 hours ago, vhusi said:

Good day,

I have a fortuna bell skiver and its messing my pieces at the end of the skiving process. I have watched hours of YouTube videos of setting the gaps between the bell knive and the presser foot, and between the roller stone and the knive, ( set them at 0.4mm) using a stock card but cant seem to get it right. What might i be overlooking or missing?

 

It's not a matter of measurement. You must use your eyes along with some trial and error on some scrap.

Is the feed stone shape in sync with the bell or does it need to go left/right a touch? Whilst you're down there, is the gap between the bell and the bottom of the presser foot even? Ensure that the up/down lever is down. Now run that piece of scrap through adjusting the up/down knob on the top until you get the depth you're looking for. Once all that is sorted you can worry about leaning the presser foot one way or the other. All this is really easy on thick leather, sometimes nigh on impossible on thin leather especially chrome tan.

Sometimes the pressure on the stone makes a difference, ie another notch more or less on the hook spring thing.

I'm taking as given a sharp bell with no burrs.

Edited Sunday at 10:28 AM by toxo

[mbnaegle]

All good advise above. The lines in the cut are a give-away that the blade is not as sharp as it needs to be. Instead of the material passing through the blade easily, it meets resistance and will try to go above or bellow the blade as it cuts. Only thing I'd add is that if there's any wear in your feed roller, such that it's out of round or has play on the spindle it turns on, the machine is likely to "eat" the material, especially when doing thinner cuts.