That said I'm having trouble obtaining a micro-bevel that's exactly parallel to the primary bevel. This in no way affects the sharpness of the edge, but when it comes time to re-sharpen, I'm forced to remove more metal than would otherwise be necessary to get back to the primary bevel.
As an example, on a 1 5/8” wide plane blade, the micro bevel on one end is nearly 1/16” wide while the bevel on the opposite end is barely perceptible. One thing that I find very interesting is that the bevel is always heavier on the left side of the blade. This occurs even if I run the tool holder and blade on the opposite side of the platter.
I'm wondering if anyone else has had a similar problem and found a solution. I've talked to the folks at Lee Valley and they've been more than cooperative and helpful. They've even gone so far as to ship me new platters and media, in case mine were out of spec. Unfortunately, that didn't solve the problem. I'm starting to wonder if maybe my technique is at fault, or my expectations are too high.
Here are a few additional details:
- Both 3mm and 4mm platters are flat within .001 inches (when running there is slight wobble (~.003) but this is consistent between platters.
- The tool bar is parallel to the platters - I have checked this several times.
- There are no air bubbles between the media and platter (LV suggested applying the PSA disks under water and even though this sounds strange, it works great - zero air bubbles)