Again the fence is set so the grinding is done on the wheel's corner and is fitted
with a stop screw to avoid the wheel contacting the next tooth, this being set precisely
by the X axis traverse. The Y axis controls the amount being ground off. The photograph
shows a large tooth saw, but with a wheel dressed to have a sharp corner saws with
small teeth can easily be sharpened. A point worth noting is that the fence and the
swivel base are the same thickness, as a result the fence also supports the saw,
this is also beneficial in some other setups, typically as in photograph 9.
The end mill attachment
For the reader who is undecided whether to make this or not I will provide a few
photographs that illustrate its use beyond just sharpening an end mill's spiral cutting
edges. However, even though it can carry out the tasks a little easier than the methods
used without it they do not justify the time taken unless the reader wishes to make
it largely for the satisfaction gained.
Photograph 21 shows the side edges of a dovetail cutter being ground. The attachment
has been fitted with a six tooth ratchet which has also been secured so as to eliminate
the end wise movement that is required when grinding the spiral flutes of an end
mill. Compare this with photograph 19. I have included the photograph in full rather
than a close up as it shows that for this one I placed one magnetic base in the centre
and mounted the rest at the end. This enabling me to get the rest well over to the
left for the task, showing the adaptability of the method, see page regarding this
method of mounting the rest.
The setup in Photograph 22 enable the end teeth to be ground with a sweeping movement
rather than being plunged, achieving a better looking result. However, as the edge
only cuts on its tip this is rather academic. The six tooth ratchet mentioned above
has been replaced with a four tooth ratchet which is clearly seen. Also the fence
has a stop at the far end to prevent the adjacent tooth contacting the wheel. Compare
this with photograph 17.
The attachment can also be used for parts that just need to be rotated when being
ground, such as a centre punch or a punch for use in a press tool. Photograph 23
shows a centre punch being ground. The leaf spring has been disengaged from the ratchet
enabling the spindle to be rotated freely. Also, rather than making a collet just
for the diameter of the centre punch shank an adaptor has been made to use with one
of the collets, the adaptor can be seen in the photograph. The angle of the point
is set by pivoting the table and the attachment fixed to the table by being clamped
between the fence behind and the screw seen in front. The Y axis traverse controls
the depth being ground.