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Rebuilding an early Covel Type 15 Surface Grinder
Part 7

Covel Surface Grinder Rebuild

A couple of those detail bits were adding the table way extension covers, and reinstalling the
etched-brass machine ID tag, using small stainless 4-40 buttonhead screws.

Covel Surface Grinder Rebuild

Then all four way wipers got cleaned up, lightly straightened, and reinstalled.

Covel Surface Grinder Rebuild

Then it was time to start working on the power supply. I'm not sure what was
originally in this hole in the left side of the main casting, but it was ideally sized
to accept a VFD. I started by making a cardboard template of the opening.

Covel Surface Grinder Rebuild

The template was easily transferred over to a chunk of 3/16" aluminum sheet, bandsawed out, and trimmed to fit.

Covel Surface Grinder Rebuild

Once drilled and countersinked for mounting screws, a second piece was cut, bent,
drilled and tapped to go in the inside, in order to hold the VFD.

Covel Surface Grinder Rebuild

Installed, from the outside...

Covel Surface Grinder Rebuild

And installed, from the inside. There should be very little grit and dust in there,
so the VFD should be fairly well protected.

Covel Surface Grinder Rebuild

Another pair of my classic arcade-style pushbuttons for the low-voltage VFD control signals..

Covel Surface Grinder Rebuild

And a weatherproof PVC junction box from the local Home Depot, and we
have a nice, functional set of controls. Why is it angled? The machine is actually
surprisingly short, so I angled the box to face up towards the operator a bit more.

Covel Surface Grinder Rebuild

After that, we run all the wiring, and get ready for the first powered test.


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