It looks normal for a one hit mortise. Typically Mortises are
elongated so when you start doing slightly overlapping cuts it cleans
out much of that and it's not that noticable.

You could pretty easily chisle that out. Make an X at the bottom with
the right sized chisel then chisle down the edges with a chisle equal
width to the sides. Light taps and lever it and it will pop out.

On Mar 16, 8:23 pm, "David" cosmosatnointerbaunspamdotcom wrote:
Hi folks,

I'm using a General mortising machine and I'm wondering if this is what I
should be getting
as a mortise?

I've adjusted the chisel and bit with the .40c method and tried a few
variations but I still end up with that little collar
at the bottom of the mortise.

I've sharpened the chisel using the Lee Valley cone sharpeners, I've gently
tuned up the bit so that it is sharp.

http://i13.tinypic.com/2z7pmab.jpg

Anyone have some suggestions as to what I might try to correct this?

I hope the picture is of sufficient detail.

Thanks for your time,

David.