File talk:ErgoLogicFlexProKB2652.jpg

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History
I still own a FlexPro, but my recollection is that the design originated with Key Tronic, and when K. T. discontinued it, ErgoLogic took over manufacture and sales. Perhaps when they assumed production and sales, it was a return to earlier times.

Extra keys
Note extra Shift, Control, and Alt keys on the base of the keyboard, closer than the Escape key. Linux distributions are likely to include keymaps that recognize these extra keys.

Mechanism
The knob at the upper left rotates a leadscrew with two separate follower nuts, one for each demi-board. Leadscrew threads, of course, are opposite "hand". ("Demi-board" is Key Tronic's name for each of the rising articulated alphanumeric halves.)

Considering that the mechanism raises the demi-boards by moving the followers toward each other, slight elevations have a mechanical disadvantage and are not practical; the "feel" with a downward push is too springy. One could fit improvised stiff foam wedges to fit underneath.

Springs assist the initial rise of the demi-boards. The square button at top center releases a latch that holds down the demi-boards when they are totally retracted.

While typing more or less sidewise is ergonomic as far as typing motion is concerned, I found that even the hand rests were insufficient to absorb the weight of my hands. Their sidewise location and heights are finely adjustable, and both movements lock in place. Their surfaces, while rounded, are unpleasantly hard. I was distressed by a need to raise them to align with the keys. Perhaps other users had differing experiences.

Demi-board mechanisms are assembled with jigs; do not disassemble them! (Ref.: Personal call to factory technician, years ago.)

The factory did have a set of keytops for the Dvorak layout, but I did not buy them.

Regards, Nikevich 03:55, 15 April 2012 (UTC)