Yesterday and this morning also I got my geometry completely wrong with my holding jig. Renewed geometry is reflected in the following picture.
When I became aware of it I tried (in vain) to get away with turning the base plate through 180 degrees and it did not work, because the bonded bed plate is simply too wide for my milling machine.
Anyway, complete setup for groove cutting is shown in the next picture.
Even with this fairly firm grasping arrangement I made two failure pieces. In general, initial failure rate is always something like 30%. This tends to improve rapidly after a few turn outs, but then it is nothing but a blow...
So, what follows looks like a good product, but it is a complete failure in minor details and I will be throwing it away after a coating experiment, with oil (WATCO) and polyurethane.
In the meantime the number of beds is increasing as you see here,
and, despite some hitches some are getting inserts embedded, as you see below, and notice that the very first insert is equidistant (in external appearance) from the corner
and another experiment is under way with ebony and walnut and one other unidentified material as the inserts. They are shown below and the idea here is to investigate into the effect of coating with these different insert pieces.
The dark triangular bit on the left is ebony, and the one to its right (reddish in colour) is something unknown. Right now, centre pieces (walnut) look dull enough, but then you will be noticing a striking difference when these are properly coated.
When I became aware of it I tried (in vain) to get away with turning the base plate through 180 degrees and it did not work, because the bonded bed plate is simply too wide for my milling machine.
Anyway, complete setup for groove cutting is shown in the next picture.
Even with this fairly firm grasping arrangement I made two failure pieces. In general, initial failure rate is always something like 30%. This tends to improve rapidly after a few turn outs, but then it is nothing but a blow...
So, what follows looks like a good product, but it is a complete failure in minor details and I will be throwing it away after a coating experiment, with oil (WATCO) and polyurethane.
In the meantime the number of beds is increasing as you see here,
and, despite some hitches some are getting inserts embedded, as you see below, and notice that the very first insert is equidistant (in external appearance) from the corner
and another experiment is under way with ebony and walnut and one other unidentified material as the inserts. They are shown below and the idea here is to investigate into the effect of coating with these different insert pieces.
The dark triangular bit on the left is ebony, and the one to its right (reddish in colour) is something unknown. Right now, centre pieces (walnut) look dull enough, but then you will be noticing a striking difference when these are properly coated.