Here we go again . . . MK4

[routercnc]

Progress has been slow because this has turned out to be more involved than planned.

I started by making a raised platform for the lathe. This was to hold the part whilst I used a flycutter to trim and true up the long edges, ready to take the add-on strips. Here are the long T-nuts being made:

Started with the drawing and some stock:


Machined to size:


Finished:


Trial fit in the cross slide, plus made up some simple spacer tubes:


The top plate (a large offcut) was bolted and shimmed using shim stock on the spacer tubes until it was as flat as possible:




Then a straight edge was dialled in:


Edge skimmed back:


Glued and countersunk screws used to add the extra strip:


Ready to try again, this time a different set up which shouldn't move!


Skimmed it all down to 96 mm trying to get within 96.00 - 96.05 everywhere. I used the height gauge to check progress and wrote the heights on the part. Here is it getting close.


I also left a machined edge on one of the sides for the rail to align to.






Hopefully that will be good enough for the rails to run on.

Machined the counterbored holes:


Ready for the end features . . .