Rotate A Monitor 


Converting a Dynamo HS1 cabinet to fit a rotating monitor.


Background

A lot of dynamo cabs come with a 19" monitor in a square wooden frame which allows the monitor to be 'easily' rotated by pulling out the frame and rotating it 90`.

Well, what if we removed the frame and added a bearing mounted so the monitor could be rotated in-cabinet with no fuss ??

After measuring the outer width of a tube, including the mounting tabs, it seemed possible that given the right bearing a 19" monitor could be rotated while mounted in the Dynamo cab. Searching for a bearing I found one where the numbers matched...

So now I present a pictorial history of getting this to work.
 

600mm bearing arrives - inner diameter is 20.812" or 528.6mm

Testing the tube fitment - it does fit as predicted
There were even two pre-drilled mounting hole that aligned with the tabs perfectly

Making out inner cut out on 1/2" oak plywood. 
Plywood was already timmed to inner dimension of dynamo cab. Approx 23.75" square

Rough jigsaw cutout of the template

Attach the bearing, line up and clamp down
Flip over and route with a template bit. The clamps have to be moved to finish off the cut.
Nice smooth internal cutout.
Outer hold were not drilled all the way through, finishing them with a 7/32 drill

Drilling the bolt holes in the backing mount.

Bearing in place on the backing mount

Tube and bearing mounting test

Mounting test with rotation

Marking drill points for the opposite side tabs

Spray it black !

Drill and countersink the other monitor tab hole

Modified mounts for the dynamo cab, 1" blocks the frame will be screwed onto.

Mounting & rotate test in the cabinet

Tube mounting - rear view
All looks good, time to start final assembly

Start  of final assembly - tube mounting in bearing
Change of plan too, the bearing will be attached to the rear of the mounting panel
Degauss coil flipped to the opposite side of the tube.

Bearing, tube and frame mounted - #10/24 bolts used throughout

Clearances are close !

Testing Rotation
Two notches were added to allow acces to the bolts holding the monitor in the bearing.
They weren't actually needed in the end.

Final mounting in the cabinet

Chassis in place
R/G/B/B+ cable and degauss cables had to be extended - everything else fitted

In place and working !
Enhancements

 - Circular monitor bezel
 - Motor drive for the rotate
 - Mount chassis to the frame for full 360' rotation