What causes these lines when skiving?Recently noticed my bell skiver leaves more emphasized lines from each pass. This is soft french goat skin that started at 1.3mm~ skived down to around 0.8mm-0.6mm.
I'm not saying this will solve your problem but whenever I use my machine for splitting I keep the sharpening wheel lightly engaged throughout the split. I've found that it makes for more consistent split across the whole piece.
How much is "lightly engaged" 😅? I've seen that in a few videos actually where the stone is grinding enough to create lots of sparks through the split as if they're sharpening the blade during the process.
That's pretty much it. Enough to keep the edge sharp but not as much pressure on the stone for a reprofiling. I do it more by ear because it's pretty tough to see out the left side of the machine while you're feeding.
Another thing I've done (that I saw on a video somewhere) was to use the bell to re-profile my rubber feed wheel so it perfectly matched the curvature of the knife. This also takes the top oxidized layer off the wheel and seems to make it a bit stickier.
The best way I've found to do this is by moving the bell knife blade towards the feed wheel rather than raising the feed wheel into the blade.....
While we're on belknife tips and tricks I like to do a double bevel on my bell blade. Not sure if this is the correct terminology but I basically start by grinding the knife high and towards the shaft then a narrower grind to the edge. Similar to the edge on a Chartermade skiving knife.
I'm typing this on my phone with a broken screen so if any of it isn't clear I'm happy to clarify. Hopefully these tips work for you.
It's common to see the lines between each row, but like Fadi says, as long as the thickness is uniform it matters not.
The bottom skive as some tearout though, possibly from skiving too much thickness at once, a dulling blade or pulling up too much as you feed it through. A lot of variables involved.
Possibly. It can also be when the feed roller isn't an exact match to the bell knife, or the presser foot isn't adjusted correctly in line with the bell knife. Not saying that's the case here, just mentioning some other variables.
I've always been paranoid of my setup in the machine and am constantly tampering with the adjustments. I'm guessing more often that not the adjustments are probably good enough and it's mostly in my head and I should try and stick to an adjustment for awhile longer before making more adjustments.I've used the machine for about 6 projects now across maybe 3 months ( so a fair amount of use). One thing I've been concerned about is that I've never cleaned out the feed roller or reapplied any oil. Is this something I should be looking into by now you think?
all skiver to that (well 99% unless you custom machine your presser foot), the most important thing is that the thickness of that line is not more (or less) than the rest of the skin.
There was another post on this forum discussing this, but I cannot find it.
I'm not saying this will solve your problem but whenever I use my machine for splitting I keep the sharpening wheel lightly engaged throughout the split. I've found that it makes for more consistent split across the whole piece.
It's common to see the lines between each row, but like Fadi says, as long as the thickness is uniform it matters not.
The bottom skive as some tearout though, possibly from skiving too much thickness at once, a dulling blade or pulling up too much as you feed it through. A lot of variables involved.
Hello,
all skiver to that (well 99% unless you custom machine your presser foot), the most important thing is that the thickness of that line is not more (or less) than the rest of the skin.
There was another post on this forum discussing this, but I cannot find it.