Motorizing HG One Part 1

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Several HG One owners have worked on motorizing their grinder. Jason Wolley for instance. He documented the mod on his website. Don Poocher did one as well as you can see in his Vimeo clip. Plus there's a thread about it on HomeBarista and on the LONDINIUM forum.
Tije is working on a similar mod for my HG One. He has some motors stored in crates in his workshop. These motors have powered windshield wipers in cars and years ago Tije salvaged them to use in theatrical art installations.

Today he picked one that has apparently kept the windshield of an Italian car clear. For power he used a vintage box that once powered electric blankets and he sent the AC from the box into a heavy rectifier bridged by the biggest Elco capacitor he could find.

To create a coupling between the HG One axis and the motor, he took an iron rod, sawed off a length, then proceeded to drill a hole in it the exact size of the outside diameter of the HG One axis on one end, and on the other side drilling a tapered hole to fit the motor, of which the little axis has a tapered part at the motor end.

He drilled a hole into the coupling pipe and threaded it to facilitate a little headless screw to fit into the little cotter wedge in the HG One axis.

Then he cut a strip of iron to fix on 4 bolts that also hold the gearbox to the HG One 'tower' and which will get a hole for the motor axis & coupling, plus three holes to bolt on the motor.

This is where we left it on day one!



Pictures below:

HG One and possible motor

Cutting off a length of iron

Ready to roll the lathe

Drilling

Larger hole on one side

Cutting the 'bottom' of the hole to be 'flat'

The wide side of the coupling part

Small side of the coupler to fit the motor

Drilling hole to fit the screw

Threading

The spot where the screw will fit in

Trying out the coupler

Cutting an iron plate 

Preparing the spots where holes will be drilled

A whack with the hammer

Drilling the holes to lock the plate near the HH One 'tower'

Enlarging these holes
Continued here: http://kostverlorenvaart.blogspot.nl/2014/11/motorizing-hg-one-part-2.html

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